Inverter firing control with pulse averaging error compensation

Details Inverter firing control with pulse averaging error compensation Inverter firing control with pulse averaging error compensation

1983-04-29

1985-02-26

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, 363132, H02M 112

Patent

active

045021058

ABSTRACT:
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. Average pole switch operating time for a given pulse in an inverter output cycle is measured by obtaining an average number of clock pulses which occur during the delay time of the associated pole switch for a given number of preceding inverter output cycles. This average count then serves as a starting point for a presettable counter which begins to count upon the occurrence of a transition point in the reference waveform. When the presettable counter reaches a preselected count, the pole switch operating cycle is initiated, thereby causing the pole switch to operate at a fixed time following a transition point in the reference signal.

REFERENCES:
patent: 3649902 (1972-03-01), Dunbar
patent: 3710229 (1973-01-01), Jessee
patent: 3715649 (1973-02-01), Ravas
patent: 3958171 (1976-05-01), Sekino
patent: 3967173 (1976-06-01), Stich
patent: 4166247 (1979-08-01), Miyazawa
patent: 4179727 (1979-12-01), Muto et al.
patent: 4228491 (1980-10-01), Abraham et al.
patent: 4291368 (1981-09-01), Yarema et al.
patent: 4443842 (1984-04-01), Jessee

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