Electromagnetic shutter driving circuit

Details Electromagnetic shutter driving circuit Electromagnetic shutter driving circuit

1979-06-11

1981-07-28

Gellner, Michael L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

354 50, 354 60R, 354235, 361152, G03B 7097, H01H 4700

Patent

active

042807611

ABSTRACT:
In the disclosed circuit, an electromagnetically driven shutter is opened and closed by an electromagnetic drive device. A detector senses the current through or the voltage across an exciting member of the electromagnetic drive. A drive circuit is controlled by a comparator which compares the output of a constant voltage source with the output of the detector. The drive circuit is regulated so that when the shutter is opened and closed, the current is maintained at predetermined values so as to always keep the shutter characteristics constant.

REFERENCES:
patent: 4104666 (1978-08-01), Toyoda et al.

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