Motor controller, electric vehicle, and heat stress estimation method for switching element

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United States of America Patent

PATENT NO 9709444
APP PUB NO 20160155278A1
SERIAL NO

14954217

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Abstract

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The specification is related to a motor controller, a vehicle including the motor controller and a heat stress estimating method for a switching element. The motor controller includes a switching element, a temperature sensor, and a computer. The switching element is configured to convert output electric power of an electric power supply into motor-driving electric power. The temperature sensor is configured to measure a temperature of the switching element. The computer is configured to extract a maximum point and a minimum point in a time-dependent change in the temperature of the switching element, the computer is configured to calculate a temperature difference between the maximum point and the minimum point adjacent to each other and configured to calculate an estimated value of a heat stress to which the switching element is subjected based on each calculated temperature difference.

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Patent Owner(s)

Patent OwnerAddress
DENSO CORPORATION1-1 SHOWA-CHO KARIYA-CITY AICHI-PREF 448-8661

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nozawa, Natsuki Toyota, JP 11 101
Taguchi, Etsushi Kasugai, JP 7 54
Taguri, Kento Toyota, JP 2 16

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