LOAD DRIVING DEVICE

PROBLEM TO BE SOLVED: To provide a load driving device which suppresses the loss in a switching operation of an FET and allows the FET to be made smaller-sized and more cost-reduced than a conventional device. SOLUTION: When a driving current to an actuator 11 is increased in a load driving device 1...

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Bibliographische Detailangaben
1. Verfasser:	IMAI FUKAMI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS PULSE TECHNIQUE 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 provide a load driving device which suppresses the loss in a switching operation of an FET and allows the FET to be made smaller-sized and more cost-reduced than a conventional device. SOLUTION: When a driving current to an actuator 11 is increased in a load driving device 10, a current flowing to the gate of an FET 12 in the switching operation is increased, a capacitor C1 parasitic on the FET 12 is quickly charged, and the time constant of the transitional resistance change between the drain and the source in the switching operation is reduced. Thus the voltage drop in the FET 12 in the switching operation is quickly attenuated, and the loss in the FET 12 caused when the driving current to the actuator 11 increases is made smaller than in a conventional device. Heat generation in the FET 12 is suppressed to allow the FET 12 to be made small-sized and more cost-reduced. COPYRIGHT: (C)2004,JPO&NCIPI