DEVICE FOR DETECTING FAILURE IN VOLTAGE-DRIVING ELEMENT

PROBLEM TO BE SOLVED: To attain a device for detecting failure in a voltage-driving element, capable of detecting failure in the voltage-driving element such as a MOSFET, especially, in a drive for a DC motor used in an industrial vehicle. SOLUTION: This is a DC motor driving circuit where a battery...

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Bibliographische Detailangaben
1. Verfasser:	SAKANO MAKOTO
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION HAULING HOISTING HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD LIFTING MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To attain a device for detecting failure in a voltage-driving element, capable of detecting failure in the voltage-driving element such as a MOSFET, especially, in a drive for a DC motor used in an industrial vehicle. SOLUTION: This is a DC motor driving circuit where a battery 11, a contactor 12, a DC motor 13, and a MOSFET 14 are connected in series. A VGS voltage detecting circuit 17, functioning as a means of protecting low- voltage driving in a power supply system, detects the malfunction in the MOSFET 14. If the gate electrode G is at a prescribed voltage α or lower or at the prescribed voltage α or higher after driving voltage is supplied to the gate electrode G of the MOSFET 14, failure in the MOSFET is annunciated. This device for detecting failure in a voltage-driving element also needs no use of an exclusive power supply circuit a conventional device had needed.