Brushless DC motor torque control

Details Brushless DC motor torque control Brushless DC motor torque control

1987-12-28

1989-05-30

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02P 602

Patent

active

048354481

ABSTRACT:
A control operates a permanent magnet brushless DC motor utilizing a phase advance signal to control motor torque. Input signals to the motor comprise a phase advance command signal and rotor position signals. The control provides switching signals to drive an inverter switch circuit to energize the motor. A start circuit is responsive to an analog rotor position signal and develops switching signals according to a preselected pattern stored in a memory. A run circuit compares a periodic sawtooth signal representing motor speed and a maximum desired phase advance, to a phase advance command signal to develop switching signals. The control switches from the start circuit to the run circuit at a preselected speed.

REFERENCES:
patent: 3908130 (1975-09-01), Lafuze
patent: 4295085 (1981-10-01), Lafuze
patent: 4320330 (1982-03-01), Bahr et al.
patent: 4546293 (1985-10-01), Peterson et al.
patent: 4561068 (1987-03-01), Meshkat-Razavi
patent: 4608527 (1986-08-01), Glennon et al.
patent: 4638224 (1987-01-01), Gritter
patent: 4751438 (1988-06-01), Markunas

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