Surface-attached type three-phase permanent magnet synchronous motor rotor magnetic pole initial position location method
A permanent magnet synchronous motor and rotor magnetic pole technology, which is applied in the control of generators, motor generators, and electromechanical transmissions, etc., and can solve the problems of low positioning accuracy and long positioning time.
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[0026] Embodiment: A method for locating the initial position of the rotor magnetic pole of a surface-mounted three-phase permanent magnet synchronous motor. This method comprises the following steps:
[0027] Step 1: PWM period T PWM determination;
[0028] The PWM period is initialized as Run the motor for PWM control: where, Input the voltage vector whose electrical angle is 0°, For the PWM full off state, Input the voltage vector whose electrical angle is 180°, For the PWM full shutdown state, the The current value of phase A is collected at all times and recorded as at a duration of When the PWM control ends, if the is less than the rated current peak value of the motor, then gradually increase the PWM period, so that p=1, 2, 3..., k is the increment of the PWM cycle, and the duration of the motor is PWM control, acquisition of and judge as a function of the peak value of the rated motor current, up to Equal to or greater than the peak value ...
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