Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1986-10-03
1988-03-08
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363132, 363 98, H02H 7122
Patent
active
047302461
ABSTRACT:
For the alternating drive of switches of a pulse frequency converter acting on a common AC-side terminal, the control pulses of the switches must be jointly latched at each alternation. For each switch, the control signal applied for its latching may be regarded as a set value for its switch voltage, whereas the actual switch voltage occurs only if after a storage time this switch actually extinguishes. By integration of the deviance, therefore, a correction signal is formed which is proportional to the storage time of the last fired switch or to the voltage-time area occurring at the output during the latch time. Thereby the distorting influence of voltage-time areas which are caused due to the spread between units of different latch times of different switches can be taken into consideration in the formation of the width-modulated control pulses.
REFERENCES:
patent: 3710229 (1973-01-01), Jessee
patent: 4150423 (1979-04-01), Boschert
patent: 4447867 (1984-05-01), Evans et al.
patent: 4535399 (1985-08-01), Szepesi
patent: 4633381 (1986-12-01), Upadhyay
Hoff Marc S.
Salce Patrick R.
Siemens Aktiengesellschaft
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