Low-power relay operating circuit

Details Low-power relay operating circuit Low-power relay operating circuit

H - Electricity

01

H

H01H 47/22 (2006.01) G08B 13/18 (2006.01) H01H 47/24 (2006.01) H05B 37/02 (2006.01)

Patent

CA 2130219

LOW-POWER RELAY OPERATING CIRCUIT ABSTRACT OF THE DISCLOSURE A high-power relay with a low-power operating circuit is usable in combination with a low-current source of DC power. The source has a hot terminal and a common terminal and a bistable relay has an energizing winding with one terminal of the winding connected to the common terminal of the supply. Semiconductor switches are connected to the second terminal, the switches being alternately operable in response to control signals to respectively set and reset the relay. First and second capacitors are connected to the first and second semiconductor switches, respectively, and first and second charging circuits are connected to the low-current source and to the first and second capacitors, respectively, to charge the capacitors from the source. The switches are connected to selectively discharge the capacitors in opposite directions through the relay winding thereby to SET and RESET the relay in response to control signals. A method of operating the circuit is also disclosed.

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