Power conversion device, motor drive system, and disconnection detection method for signal transmission cable

A power conversion device includes: a power conversion circuit that outputs power to a power output terminals to which electric cables of a power cable for supplying AC power to a motor is connected; an encoder circuit that outputs encoder information on the basis of angle information input to an in...

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Bibliographische Detailangaben
Hauptverfasser:	Washino, Masaomi, Haruna, Nobuyuki, Takahashi, Keita, Yamakaji, Yusuke
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:	A power conversion device includes: a power conversion circuit that outputs power to a power output terminals to which electric cables of a power cable for supplying AC power to a motor is connected; an encoder circuit that outputs encoder information on the basis of angle information input to an information input terminal and supplied from signal lines of a signal transmission cable; a control unit that outputs a control signal that controls the power conversion circuit on the basis of the encoder information supplied from the encoder circuit; a shield terminal connected to a shield of the signal transmission cable which is electrically connected to a ground line of a power cable on the motor side; and a determination unit that detects a current input to the shield terminal and flowing through the shield of the signal transmission cable, and outputs disconnection detection information for disconnection in the shield.