Fan motor drive device and blower device
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United States of America Patent
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Oct 4, 2016
Grant Date -
Dec 24, 2015
app pub date -
Jun 23, 2015
filing date -
Jun 24, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A fan motor drive device configured to drive a fan with a motor includes a position speed estimating calculator configured to calculate estimated values of a rotation angle and a rotation speed of the motor, a multiplier configured to calculate a control target value by multiplying the rotation speed calculated in the position speed estimating calculator and a flow coefficient, and a current vector controller configured to control a drive current of the motor by feedback control based on the control target value. A rotor magnetic flux intensity of the motor is calculated based on at least a drive current obtained by a current sensor and the rotation angle obtained from the position speed estimating calculator, and a control value used in driving the motor is changed by the rotor magnetic flux intensity thus calculated.
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