Motor temperature sensor system and method to determine motor performance
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United States of America Patent
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Jun 7, 2005
Grant Date -
Feb 10, 2005
app pub date -
Aug 5, 2003
filing date -
Aug 5, 2003
priority date (Note) -
Expired
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Abstract
A method and apparatus is herein disclosed for determining the motor performance of an electric motor through monitoring the temperature of rotor magnets. The temperature is determined by initially heating the rotor magnets to two known temperatures and subsequently recording the temperature at each known temperature. From the known and recorded temperatures, an offset, if any, is calculated. An actual temperature is then determined from the subsequent temperatures of the magnets and the offset. The actual temperature is then used as a basis to determine the motor performance.
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