Universal electric motor speed control

Details Universal electric motor speed control Universal electric motor speed control

1976-02-26

1977-08-02

Hohauser, Herman J.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318245, 318332, H02P 516

Patent

active

040399133

ABSTRACT:
A motor speed control system which comprises: (a) a power modulator circuit having gating means adapted to control the power supplied to the motor; (b) means adapted to provide a voltage which is directly proportional to the instantaneous motor terminal current; (c) means adapted to provide a sensing current which is directly proportional to the voltage across means (b), and thus to the instantaneous motor terminal current; (d) means adapted to provide a sensing current which is directly proportional to the instantaneous motor terminal voltage; (e) summing means adapted to algebraically sum the instantaneous values of the two sensing currents; (f) integrator means adapted to average the sum of instantaneous values provided by means (e); and, (g) feedback means adapted to generate a signal for operating the gating means, said signal having a phase determined by the output of the integrator means, whereby the output of the integrator means controls the phase of the gating means and thereby controls the power supplied to the motor.

REFERENCES:
patent: 3470437 (1969-09-01), Douglass
patent: 3601673 (1971-08-01), Mason

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