In view of the problem that an existing technique can detect a failure in an arm circuit for each phase and continue motor drive by only a normal phase, but a brake torque is generated due to a closed circuit of the faulty phase, an inverter apparatus for polyphase AC motor drive is provided that includes: a first power supply switching device 15 in a power supply line to an inverter circuit; a second power supply switching device 35 for each phase in the arm circuit of the inverter circuit, and a motor relay switching device 34 in an output path from each phase, wherein the parasitic diodes of the first power supply switching device 15 and second power supply switching device 35 have directional characteristics different from each other, which prevent generation of a closed circuit.
INVERTER DEVICE FOR DRIVING MULTI-PHASE AC MOTOR
WECHSELRICHTERVORRICHTUNG ZUR ANSTEUERUNG EINES MEHRPHASIGEN WECHSELSTROMMOTORS
DISPOSITIF D'ONDULEUR POUR ENTRAÎNER UN MOTEUR À COURANT ALTERNATIF POLYPHASÉ
04.05.2022
Patent
Elektronische Ressource
Englisch
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B62D MOTOR VEHICLES , Motorfahrzeuge |
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