Electric automobile
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 5, 2017
Issued Date -
N/A
app pub date -
Dec 31, 2014
filing date -
Feb 25, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An electric vehicle includes a motor unit configured to drive a wheel, the motor unit including motor coils; a control system including an inverter; a temperature sensor configured to sense temperature of the motor coils or the inverter; and a limiter configured to, if the temperature sensed by the temperature sensor is equal to or greater than a motor coils temperature threshold, reduce a motor current of the motor unit until a derivative dTmc/dt of the sensed temperature with time drops to zero or below, or to, if the temperature sensed by the temperature sensor is equal to or greater than an inverter temperature threshold, limit a current command to the inverter until a derivative dTic/dt of the sensed temperature with time drops to zero or below. The limiter is further configured to stop reducing a motor current of the motor or limiting the current command to the inverter.
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