Method and apparatus for monitoring rotational position of an electric machine
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United States of America Patent
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Jul 28, 2015
Grant Date -
Mar 5, 2015
app pub date -
Aug 27, 2013
filing date -
Aug 27, 2013
priority date (Note) -
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Abstract
A method for monitoring an electric motor employing a pulse-type rotational position sensor includes monitoring a signal output from the pulse-type rotational position sensor and a reference signal associated with a control signal for the electric motor. A position of a rotor of the electric motor coincident with the reference signal is determined based upon a nominal rotor position, a nominal rotational speed of the rotor and a time between the reference signal and a falling edge of the signal output from the pulse-type rotational position sensor. The electric motor is controlled based upon the position of the rotor.
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