Method of controlling a torque ripple of a motor having interior

Details Method of controlling a torque ripple of a motor having interior Method of controlling a torque ripple of a motor having interior

1998-07-29

1999-10-05

Ip, Paul

Electricity: motive power systems

Constant motor current, load and/or torque control

318430, 318439, 318592, 318254, H02P 600

Patent

active

059629991

ABSTRACT:
Torque ripples of a motor having interior permanent magnets can be reduced through the following method and the torque ripple controller using the same method: first, drive the motor having a plurality of phase windings and interior permanent magnets with a basic current supply circuit which outputs a basic current having a predetermined waveform, then store torque ripple waves produced in the running motor or obtained through a numerical analysis into a torque-ripple-wave-memory, next, compensate the torque ripple wave tapped off from the memory according to a prepared torque ripple compensation pattern and transform it to a torque compensation waveform with a torque-compensation-waveform-producing-circuit, further, multiply the torque compensation waveform tapped off from the waveform producing circuit by the basic current with a multiplier to output a torque ripple control current, and, supply the torque ripple control current to the plurality of phase windings shifting a phase by a predetermined electrical angle sequentially.

REFERENCES:
patent: 4651068 (1987-03-01), Meshkat-Razavi
patent: 4680526 (1987-07-01), Okuyama et al.
patent: 4767976 (1988-08-01), Mutoh et al.
patent: 5841263 (1998-11-01), Kaneko et al.
patent: 5850132 (1998-12-01), Garces
patent: 5854877 (1998-12-01), Lewis
patent: 5886491 (1999-03-01), Yoshida et al.

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