Patent Application
20090185319
1. Field of the Invention
This invention relates to a method that forces electricity economy and particularly to a method of breaking an overcurrent for economizing on energy of a lamp and lantern.
2. Description of Related Art
At the age of energy shortage and green house effect on Earth, in order to economize source of energy and protect environments on Earth, advanced countries' governments has publicly proclaimed to force the use of an energy saving lamp bulb for a lamp and lantern as an illuminator; further in order to economize in electricity, the governments stipulate for the use of each of the lamp and lantern that must be provided with an overcurrent breaking controller sensing a current fed to the lamp and lantern; USA stipulate for the use of energy saving lamp and lantern starting from year 2009.
With reference to
Consequently, because of the technical defects of described above, the applicant keeps on carving unflaggingly through wholehearted experience and research to develop the present invention, which can effectively improve the defects described above.
In a conventional method of breaking an overcurrent, a lamp and lantern 3 is connected in series to a NFB 1; thus, when the lamp and lantern 3 operates, a current generated with a consumed power caused by the lamp and lantern 3 passes through the NFB 1 to make the NFB 1 to be heated and mechanically interrupted, thereby a circuit of the lamp and lantern 3 being open; however, the NFB 1 connected in the method cannot recover and the NFB 1 must be manually again recovered and is inconveniently used for operation.
In this invention, a method of breaking an overcurrent is provided to connect an overcurrent breaking controller in series between an AC power and a load, in which overcurrent breaking controller mainly comprises a trigger control unit made up with a DIAC and a TRIAC, a current transformer, and an overcurrent restraint unit made up with a silicon-controlled rectifier (SCR) and a bridge rectifier. One terminal of the trigger control unit is connected to the AC power, while the other terminal is connected to the current transformer and then the load. The overcurrent restraint unit is connected between the trigger control unit and the current transformer. Thus, when the trigger control unit triggers the load to work, the load starts to consume a power and generates a current in a loop. When detecting the connected load of which the current generated with the consumed power is higher than a rated current of the overcurrent breaking controller, the overcurrent breaking controller instantly stops the load working. When detecting the current passing through the load that is lower than the rated current, the controller allows the work re-work. Thus, the method of breaking the overcurrent may not only prevent a user of ignorance from replacing the a load of which the rated current or power exceeds but also automatically turn off or connect the power supply for protection. Further, No extra power supply does not need to be connected to the controller, thereby power saving and easy installation being achieved and even energy waste being prevented.
Now, the present invention will be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed.
Firstly, with reference to
A. Connecting an overcurrent breaking controller 100 in series:
One terminal of the controller 100 is connected in series to a load 200, while the other terminal is connected in series to an AC power 300.
B. Triggering and controlling the load 200:
With a power source supplied by the AC power 300, the overcurrent breaking controller 100 triggers and controls the load 200.
C. Detecting a current higher than a rated current:
When starting to work, the load 200 consumes a power and generates a current in a loop and the controller 100 starts to detect the current generated with the power consumed by the load 200; when the current is higher than the rated current of the controller 100, step D proceeds.
D. Turning OFF the overcurrent breaking controller 100:
When detecting the current, being generated with the power consumed by the load 200, which is higher than the rated current, the overcurrent breaking controller 100 does not turn ON, and thus a circuit between the load 200 and the AC power 300 stays open, thereby the controller 100 instantly stopping the load 200 working.
E. Detecting a current lower than a rated current:
When detecting the current passing through the load 200 that is lower than the rated current, the controller 100 allows the load 200 to re-work and step B proceeds.
Thus, when detecting the connected load 200 of which the current generated with the consumed power is higher than the rated current of the overcurrent breaking controller 100, the overcurrent breaking controller 100 instantly stops the load 200 working. When detecting the current passing through the load 200 that is lower than the rated current, the controller 100 allows the load 200 to re-work. The load 200 in the preferred embodiment of this invention is the lamp and lantern, in which the overcurrent breaking controller 100 connected in the method of breaking the overcurrent mainly comprises a current transformer 10, a trigger control unit 20, and an overcurrent restraint unit 30.
One terminal of the current transformer 10 is connected to the load 200. The current transformer 10 mainly comprises a primary coil with small number of coils, and a secondary coil with large number of coils. In the preferred embodiment of this invention, a ratio of the primary coil to the secondary coil is set to 1:150. Thus, when a current passing through the load 200 increases, an induced current generated by the primary coil of the current transformer 10 increases and the induced voltage generated by the secondary coil increases, thereby the current transformer 10 being featured with an effect of amplification.
One terminal of the trigger control unit 20 is connected to the AC power 300, and the other terminal is connected to the current transformer 10 to trigger and control the load 200 connected to the other terminal of the current transformer 10. The trigger control unit 20 is further a phase control circuit. In the preferred embodiment of this invention, the phase control circuit is a full wave phase control circuit, mainly comprising a Diode for Alternating Current (DIAC) 21 and a TRIode for Alternating Current (TRIAC) 22, in which the DIAC 21 is connected in series to a Gate of the TRIAC 22. Thus, the DIAC 21 that turns ON may trigger the TRIAC 22 so as to make the DIAC 21 further control the load 200.
One terminal of the overcurrent restraint unit 30 is connected to the current transformer 10, while the other terminal is connected to the trigger control unit 20. With reference to
With reference to
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
