Temperature estimation device, motor control device, and temperature estimation method
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United States of America Patent
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Dec 6, 2022
Grant Date -
Oct 28, 2021
app pub date -
Nov 13, 2018
filing date -
Nov 13, 2018
priority date (Note) -
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Abstract
A temperature estimation device estimates a drive duty ratio by taking account of the influence of ambient temperature on the energization to a coil part, on the basis of a drive duty ratio and the ambient temperature, and estimates the power consumption of a motor when the coil part is energized with the estimated drive duty ratio, the power consumption of the motor, this power consumption being accompanied by the heat dissipation of the coil part, the power difference between both the power consumption values, the temperature time constant of the coil part, and a temperature variation during a period of the temperature time constant of the coil part, and estimates the temperature variation of the coil part from the ambient temperature on the basis of these estimated values and a last temperature variation of the coil part.
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