POWER CONVERTER

PURPOSE:To reduce the power consumption of a charging circuit by providing a charging circuit which has an AC power source and a current limiting impedance and starting energizing a thyristor which turns OFF a commutation condenser charged by the charging circuit. CONSTITUTION:An AC motor 15 is driv...

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Bibliographische Detailangaben
Hauptverfasser:	ANDOU YASUHIRO, SAITOU SUKEO
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	PURPOSE:To reduce the power consumption of a charging circuit by providing a charging circuit which has an AC power source and a current limiting impedance and starting energizing a thyristor which turns OFF a commutation condenser charged by the charging circuit. CONSTITUTION:An AC motor 15 is driven by a power converter 4 which has positive side thyristors 21-23, diodes 24-26, negative side diodes 27-29, thyristors 30-32 and commutation condensers 33-35, 36-38. At this time, the condenser 33 is charged through the thyristors 21 by a series circuit of a current limiting impedance 75, an AC power source 76, and a diode 77, a similar charging circuit is provided at the negative side, and the thyristors 21, 32 are first fired by a ring counter 50 according to the operating command, thereby starting it. Accordingly, the power consumption of the charging circuit can be reduced by a simple configuration, thereby improving the efficiency.