Vehicular power supply control device and a controlling method of the same

When supplying electric power to a load from a power supply via a parallel circuit of two electrical wires having the same wiring resistance, a vehicular power supply control device uses a current measurement unit in intelligent power devices (IPDs) to measure a passing current flowing in a semicond...

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Bibliographische Detailangaben
Hauptverfasser:	Satake, Shuuji, Ikuta, Yoshinori, Ueta, Keisuke, Nakamura, Yoshihide, Shigezane, Yasuyuki
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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PERFORMING OPERATIONS PHYSICS SYSTEMS FOR STORING ELECTRIC ENERGY TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Beschreibung
Zusammenfassung:	When supplying electric power to a load from a power supply via a parallel circuit of two electrical wires having the same wiring resistance, a vehicular power supply control device uses a current measurement unit in intelligent power devices (IPDs) to measure a passing current flowing in a semiconductor switching device in each of the electrical wires. Then, in order to match the temperatures of the electrical wires as estimated by a present temperature estimation unit base on the measured current, a target duty ratio in a PWM control for reducing the passing current in the semiconductor switching device of the IPD on one electrical wire is calculated in a target duty ratio calculation unit, and the semiconductor switching device of the one IPD is turned on and off by a PWM/DC control and shutoff determination unit with the calculated target duty ratio.