POWER CONVERTER

PROBLEM TO BE SOLVED: To provide a power converter and an inverter unit which are improved in reliability, solving a problem that (shaft voltage) discharge of motor neutral point potential to a shaft causes electrolytic corrosion of a bearing to remarkably shorten a service life of a motor. SOLUTION...

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Bibliographische Detailangaben
Hauptverfasser:	TOKASHIKI MUTSUO, TOMITA HIROYUKI
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 OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a power converter and an inverter unit which are improved in reliability, solving a problem that (shaft voltage) discharge of motor neutral point potential to a shaft causes electrolytic corrosion of a bearing to remarkably shorten a service life of a motor. SOLUTION: As a high-performance microcomputer is generally used at a control portion of an inverse converting portion of the power converter, and a PWM logic signal is generated by software processing, combination of logics of each phase (U, V, W) is constituted to be calculated so that appearance of a zero vector for each phase (U, V, W) may be reduced, by which the generation of the shaft voltage discharge is reduced more than ever. COPYRIGHT: (C)2007,JPO&INPIT