Overheat protection control device and vehicle-mounted power circuit device

Overheat protection control device and vehicle-mounted power circuit device

A plurality of semiconductor elements have sources which are commonly connected, and drains which are commonly connected. A voltage measurement unit measures an ON voltage between the source of a first semiconductor element of the plurality of semiconductor elements and the drain of the first semico...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Tani, Masakazu, Mitsui, Takao, Ikeda, Matahiko
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
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
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
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GENERATION
PULSE TECHNIQUE
SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:A plurality of semiconductor elements have sources which are commonly connected, and drains which are commonly connected. A voltage measurement unit measures an ON voltage between the source of a first semiconductor element of the plurality of semiconductor elements and the drain of the first semiconductor element. A determination unit receives information indicating a magnitude of an ON current between the source of the first semiconductor element and the drain of the first semiconductor element, and a measured value of the ON voltage in the voltage measurement unit, and determines whether the plurality of semiconductor elements are in a normal state or in an overheated state based on the measured value of the ON voltage and the received information indicating the magnitude of the ON current.