Patent ID: 8933656
Filing Date: 2015-01-13
Classification: H02K,H02P,Y02B

Abstract:
1. A blower system, comprising: a) a permanent magnet motor, the permanent magnet motor comprising a stator assembly comprising a winding, a rotor assembly, and a motor controller; and b) a wind wheel driven by the permanent magnet motor; wherein the rotor assembly comprises a salient pole rotor comprising a rotor core and magnets embedded in the rotor core; the motor controller employs a sensorless vector control mode and comprises a microprocessor, a frequency inverter, and a sensor unit; the sensor unit inputs a phase current or phase currents, a phase voltage, and a DC bus voltage into the microprocessor, and the microprocessor outputs a signal to control the frequency inverter; the frequency inverter is connected to the winding of the stator assembly; and a ratio between an air gap of the motor and a thickness of the magnets ranges from 0.03 to 0.065, and a ratio between a length of a pole arc and a length of the magnets ranges from 0.8 to 1.0.