Interlock circuit for complementary electronic switches

Details Interlock circuit for complementary electronic switches Interlock circuit for complementary electronic switches

1977-07-01

1978-11-21

Hohauser, Herman J.

Electricity: motive power systems

Induction motor systems

Primary circuit control

363 56, 363132, 318798, H02M 324

Patent

active

041268199

ABSTRACT:
Two transistors each have their emitter-collector circuits coupled in series between one end of a motor field winding and the opposite terminals of a D.C. voltage source to switch current flow in either direction through the winding. Two current sensors are provided, one coupled in series with each emitter-collector circuit. The voltage developed across each current sensor is applied through a driver circuit to the base of the other transistor so as to cut one transistor off when the other is conducting and vice versa, thereby eliminating the possibility of having both transistors conduct simultaneously which would short out the voltage source and burn out one or both transistors.

REFERENCES:
patent: 3559031 (1971-01-01), La Vigna
patent: 3878445 (1975-04-01), Kirkham et al.

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