Switching frequency stabilization and load fault detection in sw

Details Switching frequency stabilization and load fault detection in sw Switching frequency stabilization and load fault detection in sw

1980-04-11

1982-07-13

Truhe, J. V.

Electricity: motive power systems

Open-loop stepping motor control systems

318432, 318434, 318681, G05B 1940

Patent

active

043397018

ABSTRACT:
The switching amplifiers of the prior art improved by a variable hysteresis in the comparator circuitry of said amplifier. Said variable hysteresis is controlled by the power supply voltage and a frequency sensitive feedback circuit. If the amplifier load creates an excessive frequency which cannot be controlled, a fault detector circuit disables the amplifier.

REFERENCES:
patent: 3387205 (1968-06-01), Tesdall
patent: 3855511 (1974-12-01), Smith
patent: 4087732 (1978-05-01), Pritchard
patent: 4140956 (1979-02-01), Pritchard
patent: 4167693 (1979-09-01), Liska et al.
patent: 4209733 (1980-06-01), Narita et al.

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