Controller of a synchronous motor

Details Controller of a synchronous motor Controller of a synchronous motor

1991-04-08

1992-03-17

Shoop, Jr., William M.

Electricity: motive power systems

Synchronous motor systems

Synchronization systems

318599, 318811, 318714, H02F 528

Patent

active

050971921

ABSTRACT:
A controller of a synchronous motor for stably controlling the synchronous motor from a low speed to a high speed. The controller includes a multi-phase synchronous motor, a multi-phase square wave oscillator circuit, a magnetic pole position detection unit for detecting a position of the magnetic pole of a rotor of the multi-phase synchronous motor, and a unit for calculating a detection period of the magnetic pole position of the rotor by the magnetic pole position detection unit. The controller further includes a unit for dividing multi-phase square waves for each phase generated from the multi-phase square wave oscillator circuit into a plurality of pulses for each period to produce the divided square pulses. The controller also includes an excitation current control unit for controlling the divided square pulses for each phase in accordance with the detection period to supply the pulses to stator coils of the motor.

REFERENCES:
patent: 3967173 (1976-06-01), Stich
patent: 4322671 (1982-03-01), Kawada et al.
patent: 4952860 (1990-08-01), Soeda
patent: 4983891 (1991-01-01), Sekimoto
patent: 5010282 (1991-04-01), Moberg

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