Energy preservation and transfer mechanism

Details Energy preservation and transfer mechanism Energy preservation and transfer mechanism

1997-04-14

1999-03-30

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361156, 361155, 361166, 361167, 361195, 307141, 307139, H01H 4700

Patent

active

058896457

ABSTRACT:
An arrangement for driving actuator coils for two or more driven devices employs a microprocessor or similar controller and an actuator driver circuit. The actuator driver circuit controls two or more relay actuator coils from a single microprocessor output terminal. This output terminal can provide a high, low, or pulse output signal. An amplifier switching device, such as a transistor, whose base is coupled to the output terminal of the microprocessor, drives the first relay actuator coil as its load. A rectifying diode is connected to one end of a capacitor and thence through a negative resistance device to a second relay actuator coil or other driven device. The coil impedances are selected so that the second coil has a significantly higher impedance than the first coil. When output pulses appear at the microprocessor output terminal, the transistor switch pulses on and off, and thus energizes the first coil. Flyback voltage pulses pass through the rectifier diode to charge up the capacitor until its voltage exceeds the threshold voltage of the negative resistance device. Then current flows to energize the second relay actuator coil. By selecting the appropriate pulse rate, the microprocessor can energize either or both actuator coils.

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