Drive circuitry for electric motor

Details Drive circuitry for electric motor Drive circuitry for electric motor

1979-08-17

1981-12-15

Truhe, J. V.

Electricity: motive power systems

Open-loop stepping motor control systems

318599, 318432, G05B 1940

Patent

active

043061818

ABSTRACT:
A drive circuit for an inductive load such as a synchronous motor responds to an analog signal representing a desired load current and an actual load current and selectively applies first and second potentials to the load. The circuit includes transistor switches for selectively connecting the load to the potentials in desired polarity and diode circuits for maintaining current flow through the load when the transistor switches are opened, thereby decaying the load current.

REFERENCES:
patent: 3686557 (1972-08-01), Futamura
patent: 3824440 (1974-07-01), McIntosh
patent: 4006391 (1977-02-01), Deering et al.
patent: 4163931 (1979-08-01), Seitz et al.

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