Patent Application
20080074823
The present invention is a kind of two sets or above two sets of electromagnetic actuators controlled through switch device, driving coil such as electromagnetic braking, electromagnetic clutch, electromagnetic switch, electromagnetic relay, and electromagnetic relay, etc. for parallel actuation, so as to generate better electromagnetic actuation force, and then through the control of switch device, taking driving coil switch as serial to make the electrical current driving coil to reduce, but still sustain the operation of electrical actuation, in order to save electrical energy and reduce the heat generated by electromagnetic actuator.
As after serial connection of excitation coil it is still required to maintain the electromagnetic actuator device presenting under the operation of electrical actuator, therefore the electromagnetic actuation device applicable to the present invention must have the characteristic of maintaining electrically actuating operation after the excitation coil switched to serial connection state.
The present excitation actuator parallel actuation serial sustaining driving circuit is focusing at one or above one electromagnetic actuator with excitation coil, such as electromagnetic brake, electromagnetic clutch, electromagnetic switch, electromagnetic relay, or electromagnetic valve, etc., through the control of switch device, using the excitation coil for parallel actuation and serial sustaining operation in order to save electrical energy.
Two of the above electromagnetic actuator devices are used as preferred embodiment and described below:
Switch device 101: mechanical or electrical switches, relay, electromagnetic switch or solid state switch component, operated by human power, or mechanical power, or fluid power, or electrical energy; using alternating or direct electrical current energy to deliver to excitation coil of at least two electromagnetic actuators, or for cutting off electricity operation;
Said switch device can be used for the operation of switching, so that the coils of at least two electromagnetic actuators can be first to perform parallel actuation and then switched to serial connection state, and during serial connection the electromagnetic actuator still could maintain the operation of electrical actuation;
Electromagnetic actuators 102 and 112: consist of at least two electromagnetic brake, electromagnetic clutch, electromagnetic switch, electromagnetic relay, and electromagnetic valve with AC or DC electrical power, the electromagnetic actuators has the basic characteristic of sustaining of electrical actuating operation while the electromagnetic coils are in serial connection;
Capacitors 103 and 113: matched AC or DC capacitor or other storage and discharging component based on the specification of electromagnetic actuator, for assistance of coils 102′ and 112′ of electromagnetic actuator in sustaining the stable operation when switch device 101 is switching between series or parallel connection to electromagnetic coils. Such capacitor 103 can either be installed or not installed based on the need.
The operation of the embodiment of
If VA is the normal minimum actuation voltage of the coil of electromagnetic actuators 102 and 112, VH is the holding voltage of normal minimum sustaining electrical actuating characteristics for electromagnetic actuators 102 and 112. If the two electromagnetic actuators 102 and 112 of the preferred embodiment in
In the actual application, this electromagnetic actuator parallel actuation serial sustaining driving circuit, the two or above two electromagnetic actuators installed can be formed by similar or different electromagnetic actuators.
The previously stated capacitor connected to excitation coils 102′ and 112′ in parallel when in use of DC electrical energy for driving excitation coils also can use flying wheel diode for replacement of capacitors or mixed in use; when in use of AC electrical energy for driving excitation coils, it is also possible to be replaced by the short circuit conductivity ring or short circuit shielded windings.
In summary, this electromagnetic actuator parallel actuation serial sustaining driving circuit can use the excitation coil of the electromagnetic actuator for parallel state actuation in order to obtain better actuation response characters and controlling switching excitation coil as serial connection so as to sustain electromagnetic actuation as the operation of electrical actuation with energy savings as characteristics.
