Zero-current notch waveform for control of a three-phase,...

Details Zero-current notch waveform for control of a three-phase,... Zero-current notch waveform for control of a three-phase,...

2007-05-31

2010-12-07

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S779000, C318S799000, C318S800000, C363S041000, C363S042000, C363S056020

Reexamination Certificate

active

07847507

ABSTRACT:
A zero-current, synchronous switching waveform is provided for a three-phase, wye-connected H-Bridge to power an electric motor. The switching waveform includes two notches per cycle on the switching waveform provided to each of the semiconductor switches to minimize total harmonic distortion and switching loss. Positioning of the notch with respect to the zero-current crossing is optimized to reduce switching loss and minimize total harmonic distortion.

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Mohan/Undeland/Robbins, Power Electronics, 1995,John Wiley & Sons, Inc, 2nd Edition, pp. 240-241 and 150-153.

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