Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1989-12-11
1990-10-02
Wong, Peter S.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 37, 363 79, 363 98, 364726, 318802, 318811, H02M 112
Patent
active
049611305
ABSTRACT:
A PWM inverter takes into account the harmonic distortion produced by a d.c. link which is not constant. The controller determines switching angles in real time eliminating the need for storing PWM patterns in ROM. This is made possible by a "quick" Fourier transform which allows the determination of switching events in a PWM inverter in real time. The inverter controller develops pattern sets for rejecting selected harmonics and accounts for known fixed harmonic distortion on the d.c. link by determining the set of switching angles for each controlled selected harmonic.
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Sundstrand Corporation
Wong Peter S.
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