ELECTRIC POWER SUPPLY RELAY FAILURE PREVENTIVE DEVICE FOR ELECTRIC MOTOR DRIVING APPARATUS

PURPOSE:To restrain a variation in voltage on the output side of a relay, and discriminate reliably the existence of a failure of the electric power supply relay by arranging an electric power supply control means to preliminarily charge a capacitor means with electricity by controlling electric pow...

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Bibliographische Detailangaben
Hauptverfasser:	TAMURA KAZUTAKA, MASE HISAYASU, HATANO TAKESHI, MATSUMOTO TADAICHI, FUSHIMI TAKEHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES GENERATION LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MOTOR VEHICLES PERFORMING OPERATIONS RELAYS SELECTORS TRAILERS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Beschreibung
Zusammenfassung:	PURPOSE:To restrain a variation in voltage on the output side of a relay, and discriminate reliably the existence of a failure of the electric power supply relay by arranging an electric power supply control means to preliminarily charge a capacitor means with electricity by controlling electric power supply switching means of a bypass means so as to be turned on before relay contact point means are put in a connecting condition. CONSTITUTION:A bypass means is connected in parallel to relay contact point means 11 and 12, and when electric power supply switching means 51 and 52 of the bypass means are turned on, a bypass passage of the relay contact point means is formed. That is, an electric current can be flowed to secondary electric power supply lines (PIGA and PIGB) through the electric power supply switching means from an electric power supply means BT. However, an electric current of the bypass passage is restrained by electric current restraining means 53 and 54. An electric power supply control means controls the electric power supply switching means of the bypass passage so as to be turned on before the relay contact point means are put in a connecting condition, and preliminarily charges a capacitor means with electricity.