Multiple phase chopper current limiting

Details Multiple phase chopper current limiting Multiple phase chopper current limiting

1982-03-26

1984-02-21

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 57, 318139, 318345E, 318434, 361 31, 361 87, H02M 3315, H02P 728, H02H 7122

Patent

active

044333706

ABSTRACT:
The current in each phase of a multiple phase chopper is sensed and compared to a reference overcurrent value. Any chopper phase reaching overcurrent and any chopper phase on for a longer period of time are turned off immediately. The conduction periods of chopper phases that have been on for a shorter period of time than the overcurrent phase are similarly shortened to maintain balanced phase conduction and minimize the ripple content of the source current. The phase relationship among the various chopper phases is adjusted in response to an overcurrent turn-off to allow the commutation network associated with such phase to be adequately charged before the generation of a current turn-on for another phase.

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patent: 4090115 (1978-05-01), Franz, Jr.
patent: 4150324 (1979-04-01), Naito
patent: 4161010 (1979-07-01), Mann et al.
patent: 4257092 (1981-03-01), Prines et al.

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