Patent Grant
8723488
This invention relates to energy savings devices, systems and methods, more particularly, an insulated gate bipolar transistor/field effect transistor (IGBT/FET) based energy savings device, system and method for use wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy.
Since the industrial revolution, the world's consumption of energy has grown at a steady rate. Most power generated and energy consumed is from the combustion of fossil fuels, a nonrenewable, natural resource that is rapidly becoming depleted. As the depletion of Earth's natural resources continues, power generation and energy conservation has become an increasingly important issue with governments in both this country and abroad. In addition, not only are governments concerned with power generation and energy conservation, but businesses and consumers are also concerned as the costs for such resources are rapidly increasing.
Not only do there exist worldwide concerns with power generation and energy conservation, but there also exist concerns with power distribution as well, especially in emerging economies. Although power generation and energy conservation are of great importance, the problem of power distribution is also of great concern as it involves existing infrastructure that is usually inadequate for properly distributing power and not readily suitable to be improved upon. This problematical situation is manifested by “brown outs” wherein a nominal AC voltage cannot be maintained in the face of a grid/generation overload.
Currently, governmental entities and power companies attempt to remedy brown out occurrences by elevating the AC voltage or adding power shedding generation at appropriate locations on the power grid. This method usually results in a wide disparity of voltages available to consumers in homes and/or business. The voltage increases may range from ten percent to fifteen percent (10%-15%) and, since power is calculated by Voltage2/load, the result of the governmental entities' and power companies' “remedy” can result in increased charges to the consumer of up to twenty-five percent (25%). Thus, rather than conserving energy, governmental entities and power companies are expending energy.
Furthermore, although most appliances and equipment used in businesses and homes are capable of performing, exactly to specification, at the nominal voltage minus ten percent (10%), most energy savings devices do not exploit this feature. Thus, a further potential for energy savings is oftentimes ignored.
Therefore, a need exists for an IGBT/FET-based energy savings device, system and method wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy.
The relevant prior art includes the following references:
The primary object of the present invention is to provide an IGBT/FET-based device, system and method wherein a predetermined amount of voltage below a nominal line voltage is saved, thereby conserving energy.
Another object of the present invention is to provide an IGBT/FET-based device, system and method wherein a predetermined amount of voltage below a nominal appliance voltage is saved, thereby conserving energy.
A further object of the present invention is to provide an IGBT/FET-based device, system and method that may be used for a variety of applications, including, but not limited to, whole house energy savings devices, motor controllers, small appliance regulators and any application wherein the measurement of AC current is required.
Another object of the present invention is to provide an IGBT/FET-based device, system and method that may be used for the following: controllers for refrigerators, freezers, air conditioners, AC electric motors and AC voltage; single, bi- and poly-phase whole house energy savings devices; commercial and industrial energy savings devices; and AC voltage regulators.
A further object of the present invention is to provide an IGBT/FET-based device, system and method that virtually eliminates brown outs caused by energy overload on a power grid.
An even further object of the present invention is to provide an IGBT/FET-based device, system and method that reduces a load on a power grid.
Another object of the present invention is to provide an IGBT/FET-based device, system and method that may be used to reduce the load imposed on a power grid during peak load times.
An even further object of the present invention is to provide an IGBT/FET-based device, system and method that permits governmental entities and/or power companies to manage power from a demand perspective as opposed to a production and/or delivery perspective.
Another object of the present invention is to provide an IGBT/FET-based device, system and method that is low in costs after the initial cost of the equipment utilized in the system is amortized.
Another object of the present invention is to provide an IGBT/FET-based device, system and method provides accurate power control and regulation.
Another object of the present invention is to provide an IGBT/FET-based device, system and method wherein the device may be programmed by a user for activation for a specific time and/or date period.
An even further object of the present invention is to provide an IGBT/FET-based device, system and method wherein a user may program individual and/or multiple energy savings percentage reductions.
A further object of the present invention is to provide an IGBT/FET-based device, system and method that is adaptable to a plurality of powers and/or frequencies.
A further object of the present invention is to provide an IGBT/FET-based device, system and method that may be small in size.
Another object of the present invention is to provide an IGBT/FET-based device, system and method that is preferably affordable to an end user.
An even further object of the present invention is to provide an IGBT/FET-based device, system and method that allows a user to manage peak demand at point of consumption rather than at point of generation.
Another object of the present invention is to provide an IGBT/FET-based device, system and method that provides galvanic isolation of a central processing unit (if utilized) from an AC power source.
An even further object of the present invention is to provide an IGBT/FET-based device, system and method that may include synchronous or random pulse width modulation.
Another object of the present invention is to provide an IGBT/FET-based device, system and method that reduces hamionics resulting from currently utilized energy savings devices.
The present invention fulfills the above and other objects by providing an IGBT/FET-based device, system and method wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy. Phase input connections are provided for inputting analog signals into the device and system. A magnetic flux concentrator senses the incoming analog signal and a volts zero crossing point detector determines the zero volts crossing point of the signal. The positive half cycle and negative half cycle of the signal is identified and routed to a digital signal processor for processing the signal. The signal is reduced by a driver control via pulse width modulation and the reduced amount of energy is outputted, thereby yielding an energy savings for an end user.
The above and other objects, features and advantages of the present invention should become even more readily apparent to those skilled in the art upon a reading of the following detailed description in conjunction with the drawings wherein there is shown and described illustrative embodiments of the invention.
In the following detailed description, reference will be made to the attached drawings in which:
For purposes of describing the preferred embodiment, the terminology used in reference to the numbered components in the drawings is as follows:
With reference to
A predetermined amount of incoming energy 19 having at least one analog signal 20 therein is inputted into the device and system 1 via an inputting means, which is preferably at least one phase input connection 2. A neutral 18 line is also provided in the device and system 1. As shown in
At least one phase input connection 2 is connected to at least one sensing means, which is preferably at least one magnetic flux concentrator 3, that senses the predetermined amount of incoming energy 19. The magnetic flux concentrator 3 galvanically isolates the current of the incoming energy 19 and reports any over-current conditions to a routing means, which is preferably at least one logic device 9. If there are any over-current conditions, then the over-current conditions are simultaneously reported to the logic device 9 and a processing means, which is preferably a digital signal processor 10, wherein the digital signal processor 10 immediately shuts down the device and system 1. This electronic breaker action is intended to safeguard the device and system 1 itself, as well as the terminal equipment used in conjunction with the device and system 1 in the event of a short circuit or overload. Thus, the logic device 9 provides total protection of the power control devices in the event of a software/firmware glitch and/or power line glitch or surge in real-time as the reaction time of the logic device 9 and digital signal processor 10 is preferably 5 μs. The logic device 9 arbitrates between the drive signals applied to the IGBT/FET half cycle control transistors 54 and 58 and the signals applied to the IGBT/FET shunt control transistors 59, 60, 67 and 68. Therefore, it avoids the IGBT/FET half cycle control transistors 54 and 58 and IGBT/FET shunt control transistors 59, 60, 67 and 68 from being simultaneously driven to an on-condition that could lead to the failure of the power control and/or shunt elements. The digital signal processor 10 preferably includes at least one A/D converter 11.
Prior to reporting the analog value of the phase current from the phase input connection 2 to the digital signal processor 10, the magnetic flux concentrator 3 first transmits the incoming energy 19 through at least one signal conditioning means, which is preferably at least one analog signal conditioning device 4. After the signal(s) have been conditioned, a method which is described below, the conditioned signals are then sent to a volts zero crossing point determining means, which is preferably at least one volts zero crossing point detector 5, for detecting the point where the AC voltage goes through zero volts relative to neutral 18, which is commonly referred to as a zero crossing point.
After the zero crossing point is detected and if using a three-phase electrical system, the conditioned signal then enters at least one loss detecting means, which is preferably at least one lost phase detection device 6 and at least one phase rotation determination and rotating means, which is preferably at least one phase rotation device 7, so as to prepare the signal for proper inputting into at least one half cycle identifying means, which is preferably at lest one half cycle identifier 8, and then the logic device 9 and digital signal processor 10. Details of the half cycle identifier 8 are discussed below.
The power control is executed via at least one voltage reducing means, which preferably includes at least one IGBT/FET drive control 15, in electrical connection with the digital signal processor 10 to reduce the energy a predetermined amount. Prior to the processed signals entering the reducing means, however, the signals may once again be conditioned through at least one analog signal conditioning device 4 so as to clean a signal to remove any spurious signals or transient signals. The command signals to exercise control of the IGBT/FET drive control 15 of the voltage reducing means are determined by the digital signal processor 10 and mitigated by the logic device 9.
The reduced energy 24 then enters at least one magnetic flux concentrator 3 and then enters at least one outputting means, which is preferably at least one phase output connection 17, and is outputted to an electrically-operated device for consumption.
The system and device 1 is powered via a powering means, which is preferably a power supply unit 12 in electrical connection with the digital signal processor 10. A resetting means, which is preferably a reset switch 13, is preferably provided to permit a user to reset the device and system 1 as desired. In addition, an indicator means, such as a light emitting diode 14, may be in electrical connection withe reset switch 13 so as to alert a user if the device and system 1 needs to be reset.
The device and system 1 may optionally include at least one digital electricity meter 50 and at least one communication means, such as a USB communications interface 25, capable of interfacing with at least one computing device 16 having at least one USB port 74 and at least one window interface 40, via wired or wireless transmission. The USB communications interface 25 permits a user to monitor, display and/or configure the device and system 1 via his/her computing device 16. However, inclusion of the USB communications interface 25 is not necessary in the implementation of the device and system 1. In addition, a real time clock 49 may optionally be incorporated within the digital signal processor 10 of or otherwise connected to the energy savings device and system 1.
A user may determine the operational manner in which to use the energy savings device and system 1 of the present invention, e.g., a user may select how he/she would like to save energy by either inputting the desired RMS value, inputting the desired percentage voltage or inputting the desired percentage savings reduction into a computing device 16. For example, if a user chooses to reduce the incoming voltage by a fixed percentage, the energy savings device and system 1 permits such voltage percentage reduction and automatically lowers the voltage so as to be consistent with a maximum allowed harmonic content by establishing a lower voltage threshold. The lower voltage threshold assures that in lower or brown-out conditions, the system and device 1 does not continue to attempt to reduce the available voltage by the percentage reduction specified.
The housing 27 snaps together and bears on the conductor 28, which is preferably a cable, to ensure that the conductor 28 is held firmly against the housing 27. The housing top half 29 may be formed in various sizes so as to accommodate differing wire gauges. A plurality of apertures 38 of various sizes may be formed when the halves 29 and 30 are snapped together so as to accommodate conductors 28 of various widths. The magnetic flux concentrator 3 provides galvanic isolation of the incoming energy 19, performs accurate current measurement, is adaptable to any range of currents through multiple cable passages located within the housing 27, provides high voltage galvanic isolation, has zero harmonic distortion and superb linearity. In addition, since the current measurement range is determined by mechanical means, no changes are necessary to the printed circuit board 26. The following equation determines the approximate sensitivity:
Vout=0.06*I/(D+0.3 mm)
where I=current in the conductor 28 and D=the distance in mm from the top surface of the magnetic flux concentrator chip 37 to the center of the conductor 28.
Since no electrical connection is made to the measurement target, full galvanic isolation is achieved. Moreover, there is zero insertion loss and, therefore, no heat is dissipated nor energy lost as there is no electrical connection made nor is a shunt or a transformer used.
With reference to
To properly condition the sine wave signal, operational amplifiers 70 are utilized. An operational amplifier 70 is configured as an active, second order, low pass filter to remove or reduce harmonics and any transients or interfering signals that may be present. When utilizing such filter, however, group delay occurs wherein the group delay offsets, in time, the zero crossing of the filtered signal from the actual zero crossing point of the incoming AC sine wave. To remedy the delay, operational amplifiers 70 are provided to allow the phase change necessary to correct the zero crossing point accurately in time as required. The output of the operational amplifiers 70 is the fully conditioned 50/60 Hz sine wave signal that is connected to the A/D converter 11 of the digital signal processor 10 (see
Additional conditioning of the zero cross signal is further performed by a Schmidt buffer 35. Subsequent to the additional signal processing, a very accurate square wave 69 accurate to a few millivolts of the actual volts zero crossing point 21 of the sine wave is produced.
In a three-phase electrical system, the phase rotation may be either A-B-C or A-C-B. To enable the digital signal processor 10 to properly function, the phase rotation must first be ascertained. The comparators 34 are used to detect the volts zero crossing point(s) 21 and report the point(s) 21 to the digital signal processor 10. The digital signal processor 10, in turn, makes the rotational timing through timing logic. Each of the operational amplifiers 70 act as a simple comparator 34 with the input signal, in each case provided by the inverse parallel pairs of diodes 53 in conjunction with the series resistors 63.
The operational amplifiers 70, which are configured as window comparators 34, have separate switching thresholds determined by at least one resistor 63. As shown in
With reference to
The logic device 9 performs the routing function to assure that all signals are appropriate to the instantaneous requirement and polarity of the incoming sine wave 39 and performs the pulse width modulation function so as to assure the safe operation of the energy savings device and system 1, regardless of the state of the digital signal processor 10, presence of noise, interference or transients. The circuitry of the isolator 71, as shown in
Dealing with a resistive load is much less demanding than dealing with a reactive load, in particular, an inductively reactive load. Currently, pulse width modulation (PWM) is defined as modulation of a pulse carrier wherein the value of each instantaneous sample of a modulating wave produces a pulse of proportional duration by varying the leading, trailing, or both edges of a pulse and which is also known as pulse-duration modulation. However, for purposes of this invention and application, PWM is defined as the modulation of a pulse carrier wherein at least one slice is removed from an area under the curve of a modulating wave. When PWM is applied directly to the incoming power, the inductive component reacts when power is removed and attempts to keep the current going and will raise its self-generated voltage until the current finds a discharge path. This circumstance, without the shunt circuitry, would destroy the half cycle control transistors.
Therefore, the logic device 9 is a “supervisor” wherein it takes the appropriate action should the digital signal processor 10 “hang-up”, if there is an over-current condition or if there is a phase loss. In any of these situations, the logic device 9 responds immediately, in real time, to safeguard the half cycle control transistors and shunt devices and the equipment connected to it.
Additionally, the logic device 9 mitigates the complex drive requirements of the IGBT/FET half cycle control transistors 54 and 58 and the IGBT/FET shunt control transistors 59, 60, 67 and 68 and, to an extent, unloads the digital signal processor 10 of this task. Since the logic device 9 controls this function, it may be performed in real time and, therefore, the timing control of the drive requirements can be held to much stricter limits than would be achieved by the digital signal processor 10. The ability to respond in real time is important to the safe, reliable operation of the energy savings device and system 1 of the present invention.
The original shape of the input sine wave is retained and, since modulation can be made high, possibly 10's of KHz, filtering of the output is possible due to the smaller size of the wound components becoming a practical proposition. The overall effect is realized when the root-mean-square value (RMS), which is the square root of the time average of the square of a quantity or, for a periodic quantity, the average is taken over one complete cycle and which is also referred to as the effective value, is correctly measured and the output voltage is seen to be reduced by a percentage similar to the mark space ratio employed. Reduced voltage results in reduced current, thereby resulting in reduced power consumed by an end user.
Since IGBT and FET devices are unipolar in nature, in the case of AC control, it is necessary to provide at least one IGBT/FET drive control 15 to control each half cycle. Furthermore, to avoid reverse biasing, steering diodes are used to route each half cycle to the appropriate device. Additionally, many IGBT and FET devices have a parasitic diode shunting main element wherein connecting two IGBT or FET devices in inverse parallel would result in having two of the parasitic diodes in inverse parallel, thereby rendering the arrangement inoperative as a controlling element.
The diodes 53 are connected across the positive half cycle transistor 54 and the negative half cycle control transistor 58 and works ideally for a purely resistive load or a current-leading reactive load. However, when driving a load with a current lagging power factor, when the current in an inductively reactive component is suddenly removed, as is the case when the modulation occurs, the collapsing magnetic field attempts to keep the current going, similar to an electronic fly-wheel, and produces an EMF that will rise in voltage until it finds a discharge path that will enable release of the energy. With this arrangement, this “back EMF” would cause active components of the half cycle control element to fail. To prevent this from occurring, additional IGBT/FET shunt control transistors 59, 60, 67 and 68 are placed in a shunt configuration.
During the positive half cycle, the positive half cycle control transistor 54 modulates and a diode 53 is active during the complete positive half cycle. The IGBT second shunt control transistor 60 is turned fully on and a diode 53 is active. Therefore, any opposite polarity voltages resulting from the back EMF of the load are automatically clamped.
During the negative half cycle, the other devices comprised in series and shunt networks are activated in a similar manner.
During the switching transitions, a spike may be present which may last for a very short period of time. The spike is clamped by the transorb devices 52, which are capable of absorbing large amounts of energy for a very short period of time and enables vary fast response time. The transorb devices 52 also clamp any mains bourn transient signals due to lightning strikes or other sources that could otherwise damage the active components of the half cycle transistors or shunt transistors. Further, while each half cycle transistor is pulse width modulating, the other half cycle transistor is turned fully on for the precise duration of the half cycle. The duties of these half cycle transistors reverse during the next half cycle. This process provides complete protection against the back EMF signals discussed above. This arrangement is necessary, especially near the zero crossing time when both shunt elements are in transition.
Each of the IGBT/FET half cycle control transistors 54 and 58 and the IGBT/FET shunt control transistors 59, 60, 67 and 68 have insulated gate characteristics that require the devices to be enhanced to enable them to turn on. This enhancement voltage is preferably 12 Volts in magnitude and is preferably supplied by a floating power supply, preferably one for each pair. This is only possible since the IBGT/FET devices are operated in the common emitter mode in the case of the IGBT's and in the common source mode in the case of the FET's; otherwise, four isolated power supplies would be required for each phase. Each of the pairs requires a separate drive signal that is provided by the isolated, optically-coupled drivers 66. These drivers 66 make use of the isolated supplies and serve to very rapidly turn-on and turn-off each power device. These drivers 66 are active in both directions, which is necessary since the input capacitance of the power devices are high and have to be actively discharged rapidly at the turn-off point and charged rapidly at the turn-on point.
The problem with direct pulse width modulation is when driving an inductively reactive load as when the IGBT modulates off, there is a back EMF that needs to be clamped. Referring to
Due to modulation of the positive half cycle, a back EMF signal occurs. Since the negative half cycle control transistor 58 is on during this time, the negative back EMF is passed through a diode 53 to be clamped at the simultaneous AC positive half cycle voltage.
Although no modulation is applied to the IGBT first shunt control transistor 59 and the IGBT second shunt control transistor 60, these transistors 59 and 60 work in conjunction with diodes 53 in a similar manner as set forth above.
As shown in
Similarly, as shown in
In summary, there are two clamping strategem used, the first for the positive half cycle and the second for the negative half cycle. During the positive half cycle, when the positive half cycle control transistor 54 is modulated, the negative half cycle control transistor 58 and the second shunt control transistor 60 are on. During the negative half cycle, when the negative half cycle control transistor 58 is modulated, the positive half cycle control transistor 54 and the IGBT first shunt control transistor 59 are on.
The hardware utilized in the IGBT-based and FET-based energy savings device and method 1 of the present invention is identical with the only difference being the IGBT/FET half cycle control transistors 54 and 58 and the IGBT/FET shunt control transistors 59, 60, 67 and 68. The circuitry diagrams of the IGBT-based circuitry
With reference to
The power supply unit 12 is fully-isolated and double-regulated in design. At the input, a rectifier 72 composed of diodes 53 accepts single, bi- and three-phase power. The power is applied to a switching regulator 90 and integrated circuit 62 via a transformer 57. In view of the large voltages existing across the DC terminals, the switching regulator 90 and integrated circuit 62 is supplemented by a FET transistor 73 employed in a StackFET configuration in order to raise its working voltage. The secondary of transformer 57 has a diode 53 and a reservoir capacitor 56. The DC voltage across capacitor 56 is passed via the network resistors 63 and a Zener diode 75 to an optical isolator 65 and finally to the feedback terminals. Use of the optical isolator 65 guarantees galvanic isolation between the input and the supply output (6.4V DC). Finally, the output of the linear voltage regulators 81 (3.3 VA DC) is passed to a operational amplifier 70, which is configured as a unity gain buffer with two resistors 63 that set the split rail voltage. The main neutral is connected to this split rail point and also a zero Ohm resistor. An inductor 78 isolates the supply rail digital (+3.3V) from the analog (3.3 VA) and reduce noise.
Next,
The circuitry of a USB communications interface 25 is shown in
Since the main printed circuit board is not isolated from neutral, it is necessary to galvanically isolate the USB communications interface 25. Use is made of the built-in serial communications feature of the digital signal processor 10 to serially communicate with the communication means 46. Signals, on the user side of the isolation barrier, are applied to an integrated circuit 62, which is a device that takes serial data and translates it to USB data for direct connection to a computing device 16 via a host USB port 74. The host USB 5V power is used to power the communication means 46 and voids the necessity of providing isolated power from the unit. Preferably, there are two activity light emitting diodes 14, that indicate activity on the TX (transmit) and RX (receive) channels. Communications preferably operates at 9600 Baud, which is adequate in view of the small amount of data passed.
Although the inclusion of a communications means is not necessary in the performance of the energy savings device and system 1, it is a feature that permits easier use of the device and system 1.
Finally, with reference to
In the operational field 43, a user may select the manner in which he/she/it desires to conserve energy. The manners include voltage reduction percentage wherein the output Volts is adjusted by a fixed percentage, savings reduction percentage wherein the output Volts is aimed at achieving a savings percentage and voltage regulation wherein the root mean squared Volts output is a pre-set value.
The phase field 44 permits a user to select the phase type used in connection with the energy savings device and system 1, i.e., single phase, bi-phase or three phase.
The startup field 45 permits a user to configure the system and device 1 to randomly start and/or to have a delayed or “soft start” wherein the user input the delay time in seconds in which the system and device will start.
The calibration field 46 permits a user to input the precise calibrations desired and/or to rotate the phases.
The setpoints field 47 displays the settings selected by the user and shows the amount of energy saved by utilizing the energy savings device and system 1 as voltage regulation, voltage reduction percentage or power savings reduction percentage. With respect to percentage voltage reduction, the lower limit RMS is set below the incoming voltage passed therethrough to permit the incoming voltage to be passed through when it is less than or equal to the lower limit voltage. With respect to the percentage savings reduction, the lower limit RMS is set below the incoming voltage passed therethrough.
Indicators 48 are provided on the windows interface 40 display operating current, operating voltage, line frequency, calculated power savings and phase rotation.
A real time clock 49 may be incorporated into the windows interface 40 to allow programming of additional voltage reduction for a predetermined time and a predetermined operational time, e.g., for seasons, days of the week, hours of the day, for a predetermined operational time. In addition, a user may program the energy savings device and system 1 to operate during various times of the day. The real time clock 49 is set through a communications port or fixed to allow the selection of defined seasonal dates and time when, through experience, are known to exhibit power grid overload. During these times, the system allows further reduction of the regulated AC voltage, thereby reducing the load on the grid. Multiple time can be defined each with its own additional percentage reduction or voltage drop.
The digital electricity meter 50 provides a means to log statistical data on power usage, power factor and surges. The digital electricity meter 50 also provides the ability to include capacitors for power factor correction, operates on single, bi and three-phase systems and operates on all world wide voltages. It may be used remotely or locally to disable or enable the user's power supply at will by the provider. In addition, the digital electricity meter 50 may detect when the energy savings device and system 1 has been bridged by an end user attempting to avoid paying for energy consumption wherein the provider is alerted to such abuse. Finally, use of the real time clock 49 permits a user and/or provider to reduce the consumption of power at selected times of a day or for a selected time period, thereby relieving and/or eliminating brown-out conditions.
It is to be understood that while a preferred embodiment of the invention is illustrated, it is not to be limited to the specific form or arrangement of parts herein described and shown. It will be apparent to those skilled in the art that various changes may be made without departing from the scope of the invention and the invention is not be considered limited to what is shown and described in the specification and drawings.
This application is a continuation of U.S. application Ser. No. 12/185,442, filed Aug. 4, 2008, now U.S. Pat. No. 8,085,009 to issue on Dec. 27, 2011, which claims the benefit of U.S. Provisional Applications Nos. 60/964,587 filed Aug. 13, 2007; 60/966,124 filed Aug. 24, 2007; 61/009,844 filed Jan. 3, 2008; 61/009,846 filed Jan. 3, 2008; 61/009,845 filed Jan. 3, 2008; and 61/009,806 filed Jan. 3, 2008, all of which are incorporated by reference herein in their entirety for all purposes.
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| Notification of Eurasian Patent Office Readiness to Grant Patent dated Dec. 15, 2011 for Application No. 201070369/ (OFE/1004/0111) filed Apr. 13, 2010 with English translation (our matter 117EA) (2 pages). |
| Response dated Apr. 3, 2012 for Eurasian Application No. 201070369 (our matter 117EA) (16 pages). |
| Response dated Mar. 5, 2012 for Application No. W-00201000893 with English translation distinguishing US 5,828,200 to Ligman and US 6,449,567 to Desai (our matter 117ID) (15 pages). |
| Final Office Action in U.S. Appl. No. 12/207,913 mailed from the USPTO on Mar. 14, 2012 relying on US 6,274,999 to Fuji and US 6,489,742 to Lumsden (our matter 117) (17 pages). |
| Extended European Search Report from the European Patent Office in Application No. 08830045.4 dated Aug. 22, 2012 (our matter 117EP) (8 pages). |
| Notice of Reasons for Refusal of Patent Application No. 2010-524881 mailed from the Japanese Patent Office on Aug. 28, 2012 relying on Japanese Unexamined Patent Publication HEI6-261594 with English translation (our matter 117JP) (6 pages). |
| Response to final Office Action for U.S. Appl. No. 12/207,913, filed Sep. 13, 2012 (our matter 117) (32 pages). |
| Sul, S K and Park, M H: “A novel Technique for Optimal Efficiency Control of a Current-Source Inverter-Fed Induction Motor”, IEEE Transactions on Power Electronics, vol. 3, No. 2, Apr. 1, 1988, pp. 192-199, XP002063874, ISSN: 0885-8993, DOI: 10.1109/63.4349, p. 2, left-hand column, line 9-p. 4, left-hand column, line 29; Figs. 4-8 (8 pages); retrieved from IEEE databank attached, considered to be particularly relevant if taken alone, (our matter 117EP) (8 pages). |
| Flemming Abrahamsen, et al.: “On the Energy Optimized Control of Standard and High-Efficiency Induction Motors in CT and HVAC Applications”, IEEE Transactions on Industry Applications, IEEE Service Center, Piscataway, NJ, US, vol. 34, No. 4, Aug. 1, 1998, XP011022398, ISSN: 0093-9994, p. 4, right-hand column, line 11-p. 5, left-hand column, line 5; Fig. 9 (10 pages); ); retrieved from IEEE databank attached, considered to be particularly relevant if taken alone, (our matter 117EP) (10 pages). |
| Office Action issued by the State Intellectual Property Office (SIPO) on Apr. 28, 2012 for Chinese Application No. 200880115946 (PCT/US2008/010720) relying on US 6,274,999 B1 to Fuji, with English translation (our matter 117CN) (21 pages). |
| Office Action from Eurasian Patent Office dated Aug. 16, 2012 for Application No. 201070369/31 with English translation (our matter 117EA) (4 pages). |
| European Patent Office grant of patent dated Jun. 4, 2012, European Patent Application No. 08795029.1-1242 (our matter 113EP) (61 pages). |
| Response to requesting deletion of text added to claims 1 and 10 by Examiner dated Sep. 19, 2012, European Patent Application No. 08795029.1-1242 (our matter 113EP) (2 pages). |
| Office Action from the Eurasian Patent Office dated May 28, 2012, Eurasian Patent Application No. 201070276/31 (our matter 113EA) (English translation, 2 pages). |
| Response including reference numbers for 96 claims as filed in U.S. Appl. No. 13/331,757 on or between Sep. 20-27, 2012 (our matter 139EA) (12 pages). |
| Response dated Jul. 9, 2012 amending claims to claims 1-77 of US Patent No. 8,085,009 (our matter 113CN) (24 pages). |
| International Search Report and Written Opinion for International Application No. PCT/US2012/035844 dated Nov. 16, 2012 corresponding to US2012/0213645 Al (our matter 135) (8 pages). |
| Patent Cooperation Treaty Notification Concerning Transmittal of International Preliminary Report on Patentability (Chapter I of the Patent Cooperation Treaty) (PCT Rule 44bis.1(c) mailed Mar. 14, 2013 for PCT Application corresponding to International Application No. PCT/US2011/020326, filed on Jan. 6, 2011, and published as WO 2012/030403 on Mar. 2, 2012, corresponding to U.S. Appl. No. 12/967,128 published as US-2011/0080130 A1 (our matter 0133) (6 pages). |
| Office Action from the U.S. Patent and Trademark Office mailed Feb. 22, 2013 corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 0117US) (48 pages). |
| Office Action from the State Intellectual Property Office mailed Mar. 29, 2013 for Chinese Application No. 200880115946.5 (our matter 0117CN) with English translation corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 0117US) (19 pages). |
| Response to Office Action from the State Intellectual Property Office dated Mar. 29, 2013 for Chinese Application No. 200880115946.5 (our matter 0117CN) corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 0117US) (13 pages). |
| Notice of Allowance form the U.S. Patent and Trademark Office mailed Jun. 11, 2013 for U.S. Appl. No. 13/451,041, published as US-2012/0213645 A1 (our matter 0135US) (49 pages). |
| Response to Office Action from the Colombian Patent Office dated Dec. 27, 2012 for Colombian Application No. 10.042.683 (our matter 0117CO) with English translation corresponding to U.S. Appl. No. 12/207,913, republished as US-20I0/0117588 A1 (our matter 0117US) (55 pages). |
| Response to Office Action from Eurasian Patent Office dated Dec. 17, 2012 for Application No. 201070369/31 (our matter 117EA) corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 01I7US) (15 pages). |
| Notification of the necessity to Submit Additional Materials from the Eurasian Patent Office dated Apr. 1, 2013 for Application No. 201070369/31 (our matter 117EA) with English translation corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 0117US) (4 pages). |
| Response to Supplementary European Search Report from the European Patent Office mailed on Aug. 22, 2012, filed on Mar. 18, 2013 regarding European Application No. 08830045.4 (our matter 117EP) corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 0117US) (21 pages). |
| Notice of Reasons for Refusal of Patent Application No. 2010-524881 (our matter 117JP) mailed from the Japanese Patent Office on Aug. 28, 2012 with English translation, relying on Japanese Unexamined Patent Publication HEI6-261594; (6 pages). |
| Response to 2nd Office Action for Chinese Patent Application No. 200880111387.0 (our matter 0113CN) filed on Jan. 8, 2013 corresponding to U.S. Appl. No. 12/185,442, issued as US Patent No. 8085009B2 (our matter 0113US) (25 pages). |
| Voluntary Amendment filed on Mar. 21, 2013 for Chinese Patent Application No. 200880111387.0 (our matter 0113CN) filed on Jan. 8, 2013 corresponding to U.S. Appl. No. 12/185,442, issued as US Patent No. 8085009B2 (our matter 0113US) (22 pages). |
| Notification on Grant of Patent Right for Invention mailed on Apr. 9, 2013 for Chinese Patent Application No. 200880111387.0 (our matter 0113CN) filed on Jan. 8, 2013 with English translation corresponding to U.S. Appl. No. 12/185,442, issued as US Patent No. 8085009B2 (our matter 0113US) (4 pages). |
| Response to Office Action for Colombian Patent Application No. 10.029.658 (our matter 0113CO) filed on Feb. 20, 2013 corresponding to U.S. Appl. No. 12/185,442, issued as US Patent No. 8085009B2 (our matter 0113US) (42 pages). |
| Office Action from the U.S. Patent and Trademark Office mailed Mar. 13, 2013 corresponding to U.S. Appl. No. 12/873,510, published as US-2010/0320956 A1 on Dec. 23, 2010 (our matter 0123US), which is a continuation-in-part of U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (our matter 0117US) (15 pages). |
| International Search Report for International Application No. PCT/US2010/047477 (our matter 0123PCT) mailed Mar. 22, 2012 corresponding to U.S. Appl. No. 12/873,510, published as US-2010/0320956 A1 (our matter 0123US) (9 pages). |
| Voluntary Amendment filed on Nov. 9, 2012 for Chinese Patent Application No. 201080039849.X (our matter 0123CN) corresponding to U.S. Appl. No. 12/873,510, republished as US-2010/0320956 A1 (our matter 0123US) (8 pages). |
| Office Action from the U.S. Patent and Trademark Office mailed Feb. 26, 2013 corresponding to U.S. Appl. No. 12/893,539, published as US-2012/0075896 A1 (our matter 0127US) (7 pages). |
| International Search Report for International Application No. PCT/US2010/050714 (our matter 0127PCT) mailed Apr. 11, 2013 corresponding to U.S. Appl. No. 12/893,539, published as US-2012/0075896 A1 (our matter 0127US) (5 pages). |
| Office Action from the U.S. Patent and Trademark Office mailed Apr. 10, 2013 corresponding to U.S. Appl. No. 13/026,931 (our matter 0128US) (11 pages). |
| Notice of Allowance from the U.S. Patent and Trademark Office mailed Jun. 11, 2013 corresponding to U.S. Appl. No. 12/967,128 (our matter 0133US) (11 pages). |
| Office Action from the U.S. Patent and Trademark Office mailed Aug. 17, 2012 corresponding to U.S. Appl. No. 13/331,757 (our matter 0139US) (14 pages). |
| Response to Office Action from the U.S. Patent and Trademark Office mailed Aug. 17, 2012, filed Nov. 15, 2012 corresponding to U.S. Appl. No. 13/331,757 (our matter 0139) (26 pages). |
| Final Office Action from the U.S. Patent and Trademark Office mailed Feb. 27, 2013 corresponding to U.S. Appl. No. 13/331,757 (our matter 0139) (45 pages). |
| Response to Office Action from the Eurasian Patent Office filed on Apr. 19, 2013 corresponding to U.S. Appl. No. 13/331,757 (our matter 0139) (13 pages). |
| Sul, S K and Park, M H: “A novel Technique for Optimal Efficiency Control of a Current-Source Inverter-Fed Induction Motor”, IEEE Transactions on Power Electronics, vol. 3, No. 2, Apr. 1, 1988, pp. 192-199, XP002063874, ISSN: 0885-8993, DOI: 10.1109/63.4349, p. 2, left-hand column, line 9-p. 4, left-hand column, line 29; Figs. 4-8 (8 pages); retrieved from IEEE databank attached, considered to be particularly relevant if taken alone, (our matter 117EP) (16 pages). |
| Flemming Abrahamsen, et al.: “On the Energy Optimized Control of Standard and High-Efficiency Induction Motors in CT and HVAC Applications”, IEEE Transactions on Industry Applications, IEEE Service Center, Piscataway, NJ, US, vol. 34, No. 4, Jul./Aug. 1998, XP011022398, ISSN: 0093-9994, p. 4, right-hand column, line 11-p. 5, left-hand column, line 5; Fig. 9 (10 pages); ); retrieved from IEEE databank attached, considered to be particularly relevant if taken alone, (our matter 117EP) (20 pages). |
| International Search Report for International Application No. PCT/US2011/032840 (our matter 0128PCT), mailed Apr. 11, 2013 corresponding to U.S. Appl. No. 13/026,931 (our matter 0128US), published as US 2011-0182094 A1 (6 pages). |
| Industry and Commerce Superintendency, Republic of Colombia, Resolution No. 71361, denying the Colombian patent application corresponding to US2010/0117588 (U.S. Appl. No. 12/207,913) (our matter 117), dated Nov. 26, 2012, executed by Pablo Felipe Robledo Del Castillo (6 pages), with English translation (6 pages) (Total 12 pages). |
| Response to Office Action for Chinese Application No. 200880115946.5 filed on Aug. 13, 2013 with English translation of claims 1-41- corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (20 pages). |
| Notification of Third Action for Chinese Application No. 200880115946.5 issued on Oct. 10, 2013 with English translation of Office Action—corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1(17 pages). |
| Notification of Office Action for Japanese Patent Application No. 2010-520985 mailed on Jun. 25, 2013 with English translation—corresponding to U.S. Appl. No. 12/185,442, now Publication No. US2009/0046490 A1 (4 pages). |
| Notice of Reasons for Refusal of Japanese Patent Application No. 2010-524881 mailed on Sep. 10, 2013—corresponding to U.S. Appl. No. 12/207,913, republished as US-2010/0117588 A1 (6 pages). |
| Office Action No. 13454 for Colombian Patent Application No. 12.052.906 mailed on Jul. 23, 2013 with English translation—corresponding to U.S. Appl. No. 12/873,510, republished as US-2010/0320956 A1 (14 pages). |
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| 20120086415 A1 | Apr 2012 | US |
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| 60964587 | Aug 2007 | US | |
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| 61009844 | Jan 2008 | US | |
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| 61009845 | Jan 2008 | US | |
| 61009806 | Jan 2008 | US |
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| Parent | 12185442 | Aug 2008 | US |
| Child | 13331757 | US |
