Device to increase the closing force of AC powered contactors, relays and solenoids

摘要

A device for increasing the closing force of an AC powered contact in a circuit having a low-voltage AC source and a switch in a structure of the type used for activating electric devices by means of a low voltage such as heating pumps, air conditioners and refrigerators. In order to improve the closing force, a half-wave rectifier operates on the AC voltage to provide an output to energize the contactor. The closing force when the contactor receives the half-wave rectified voltage exceeds a force generated by the contactor when it receives an unrectified low-voltage alternating current of the same voltage and frequency value. The resulting improved closing force is accompanied by an improvement in the life time of the electromagnetic contactor and a decrease in the resistance of the electrical flow through the contactor.