POWER CONVERTER APPARATUS

PURPOSE:To suppress a spike voltage and to reduce a circuit loss by absorbing through a capacitor the spike voltage generated at the time of commutation of a frequency converter circuit, and by connecting the capacitor with a proper transformer according to the polarity of a transformer output to re...

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Bibliographic Details
Main Authors AMANO HISAO, TOKUNAGA KIICHI, MATSUDA YASUO, YAMATO IKUO
Format Patent
LanguageEnglish
Published 21.05.1990
Subjects
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Summary:PURPOSE:To suppress a spike voltage and to reduce a circuit loss by absorbing through a capacitor the spike voltage generated at the time of commutation of a frequency converter circuit, and by connecting the capacitor with a proper transformer according to the polarity of a transformer output to regenerate the charge of the capacitor on the transformer side. CONSTITUTION:Just before the secondary voltage e2 of a transformer 3 attains zero, a transistor Tr 43 is turned ON and a capacitor C709 is charged with a voltage twice as much as the peak value of a voltage e2 via the Tr 43 and diodes D705, 708. When commutation occurs from Trs 41, 43, the stored energy of a circuit inductance such as the leakage inductance of a transformer 3 is absorbed by C709. Thus, a spike voltage generated in a circuit can be suppressed. Also, when TRrs 701, 704 are turned ON according as a voltage e2 attains a peak value, a discharge route for C709 is formed and the absorbed energy is released to a load.
Bibliography:Application Number: JP19880241113