DC VOLTAGE RISE PREVENTIVE DEVICE FOR INVERTER

PROBLEM TO BE SOLVED: To prevent the DC voltage of an inverter from rising by a method in which a resistor is inserted between the grounding part of the shield of a shielded power line with which the inverter is connected to a three-phase induction motor and an actual grounding point or between the...

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Bibliographische Detailangaben
1. Verfasser:	ENOMOTO YASUHISA
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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER 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 SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the DC voltage of an inverter from rising by a method in which a resistor is inserted between the grounding part of the shield of a shielded power line with which the inverter is connected to a three-phase induction motor and an actual grounding point or between the grounding part of an inverter input power supply apparatus and an actual grounding point. SOLUTION: A resistor 17 is inserted between the grounding part 143 of a shielded line and an actual grounding point 15. With this constitution, the maximum value of a resonance current produced by a coil and a capacitor can be suppressed and, further, the resonance can be attenuated. As a result, the resonance current is reduced and a current by which a DC voltage smoothing capacitor 133 in an inverter 13 is charged is reduced, so that the rise of the DC voltage of the inverter 13 can be avoided.