DC Motor control

Details DC Motor control DC Motor control

1982-10-15

1984-07-03

Rubinson, G. Z.

Electricity: motive power systems

Battery-fed motor systems

318345R, 318341, H02P 506, H02P 500

Patent

active

044581831

ABSTRACT:
To reduce battery drain by a DC electric motor (e.g. in the case of an ambulatory monitoring tape recorder) the motor is fed with pulses of current derived from a pulse circuit that includes a differential amplifier monitoring the voltage difference between a first reference voltage that is related to torque load on the motor and a second reference voltage that is derived by adding a sawtooth waveform to a base signal that is proportional to the voltage across the motor.

REFERENCES:
patent: 3241023 (1966-03-01), Eby
patent: 3855511 (1974-12-01), Smith
patent: 3912994 (1975-10-01), Stovall
patent: 3914671 (1975-10-01), Morton et al.
patent: 4200832 (1980-04-01), Johansson et al.
patent: 4211961 (1980-07-01), Marumoto et al.
patent: 4381479 (1983-04-01), Wesling et al.

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