Position sensor-free permanent magnet synchronous motor starting method
A technology of permanent magnet synchronous motor and starting method, which is applied to control generator, motor generator control, electronic commutation motor control, etc., can solve the problems of motor out of step, large motor impact, and large influence of motor starting torque.
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[0062] Such as figure 1 Shown is the block diagram of the optimized "three-stage" starting method of the present invention, and the implementation of the optimized "three-stage" starting method comprises the following steps:
[0063] First, when the motor starts, a two-step current injection method based on a current closed loop is used. Among them, the system block diagram of current closed-loop pre-positioning is as follows: figure 2 As shown; the block diagram is composed of d / q axis current regulator, Park transform and its inverse transform, Clarke transform, SVPWM modulation module, three-phase inverter, permanent magnet synchronous motor.
[0064] According to a specific example of the present invention, such as figure 2 As shown, the permanent magnet synchronous motor is an air conditioner compressor, which is controlled by an IPM module and modulated by a seven-stage SVPWM.
[0065] in, is the estimated decoupling angle.
[0066] The specific process of the tw...
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