Motor control using third harmonic stator voltage signal

Details Motor control using third harmonic stator voltage signal Motor control using third harmonic stator voltage signal

1993-12-30

1995-12-05

Wysocki, Jonathan

Electricity: motive power systems

Induction motor systems

Primary circuit control

318254, 318439, H02P 742

Patent

active

054732409

ABSTRACT:
A method and apparatus for controlling operation of a brushless permanent magnet motor wherein a signal containing third harmonic component of the motor flux density is acquired and filtered to isolate the third harmonic components, the filtered third harmonic components are integrated to produce a time integral signal, the back EMF of one stator phase is sensed and the resulting EMF signal is filtered zero crossings of the filtered signals are sensed and then employed to drive an inverter controller.

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Julio C. Moreira, et al., "Simple Efficiency Maximizer for an Adjustable Frequency Induction Motor Drive," IEEE Transactions on Industry Applications, vol. 27, No. 5, Sep./Oct., 1991.

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