Control apparatus in motor drive system and method of controlling motor drive system
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United States of America Patent
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Jan 6, 2015
Issued Date -
N/A
app pub date -
Apr 5, 2013
filing date -
Jun 26, 2012
priority date (Note) -
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Abstract
A control apparatus in a motor drive system includes a magnet temperature acquiring device and a step-up ratio determining device. The magnet temperature acquiring device is configured to estimate or detect a temperature of a permanent magnet provided in a rotor or a stator of a motor of the motor drive system. The motor drive system includes a power supplying device to output direct current voltage, and a voltage step-up device to increase, at a certain step-up ratio, the direct current voltage which is output from the power supplying device. The step-up ratio determining device is configured to determine the certain step-up ratio in accordance with the temperature of the permanent magnet estimated or detected by the magnet temperature acquiring device.
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