H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/55
H02M 7/5395 (2006.01) H02M 7/527 (2006.01) H02M 7/539 (2006.01)
Patent
CA 1191892
ABSTRACT OF THE DISCLOSURE A pole switch firing control for a pulse width modulated inverter controls pole switch operation under steady state operating conditions such that the inverter output duplicates a reference signal waveform after a fixed time delay. Pole switch operating time for a given pulse in an inverter output cycle is measured and sub- tracted from a fixed time interval to get a delay time. In the succeeding output cycle, the corresponding pulse is produced by initiating the pole switch operating sequence after the delay time, thereby causing the pole switch to operate a fixed time following the reference signal.
421574
Oldham And Company
Westinghouse Electric Corporation
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