Switching transconductance amplifier for inductive loads

Details Switching transconductance amplifier for inductive loads Switching transconductance amplifier for inductive loads

1979-10-30

1981-06-09

Dobeck, B.

Electricity: motive power systems

Open-loop stepping motor control systems

318680, 318138, 330 8, G05B 1940

Patent

active

042727138

ABSTRACT:
A switching current amplifier for stepping motors utilizing a square hysteresis loop transformer to measure the motor winding load current directly, to determine the high and low switching points in reference to the position command signal, to compare the motor winding current to the determined switching points and to provide a switching signal to switch the output devices of the amplifier when the motor winding current reaches the switching points. The square hysteresis loop transformer is constructed to have a high common mode signal rejection.

REFERENCES:
patent: 4087732 (1978-05-01), Pritchard
patent: 4100471 (1978-07-01), Pritchard
patent: 4140955 (1979-02-01), Drabing
patent: 4140956 (1979-02-01), Pritchard
patent: 4171510 (1979-10-01), Kiwaki et al.

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