Variable speed motor drive system

Details Variable speed motor drive system Variable speed motor drive system

1982-07-12

1984-08-21

Rubinson, G. Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

363132, 363 37, H02P 536

Patent

active

044672616

ABSTRACT:
A motor drive system which utilizes the relatively poor storage time or turn-off time of Darlington pair power transistors which have typically been used as the driver elements in inverter motor driver applications. It primarily finds use in multiphase systems, such as the six step three phase inverter. The relatively long turn-off time of the power Darlington provides relatively constant collector current to the motor without the need for additional circuitry to provide constant base drive load. An additional circuit automatically and dynamically tailors the motor torque to the load requirements to minimize unnecessary use of electrial energy.

REFERENCES:
patent: 3449595 (1969-06-01), Marek
patent: 4338532 (1982-07-01), Houghton
patent: 4354223 (1982-10-01), Turnbull
patent: 4357655 (1982-11-01), Beck

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