Asynchronous motor speed sensorless control method based on improved Q-MRAS
A speed sensorless, asynchronous motor technology, applied in motor generator control, electronic commutation motor control, control system and other directions, can solve the problem of the decline of the estimation effect, achieve strong load capacity, solve the strong dependence of motor parameters, The effect of high speed identification accuracy
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[0026] The present invention will be further described below in conjunction with the description of the drawings and the specific embodiments.
[0027] Such as Figure 1 to Figure 14 As shown, a speed sensorless control method of asynchronous motor based on improved Q-MRAS includes the following steps:
[0028] (1) Speed control: According to the deviation between the motor speed estimated by the speed sensorless method and the given speed, the difference is sent to the speed regulator (PI regulator), and the calculated output is the stator current q axis The given value of the component;
[0029] (2) Calculation of slip frequency: According to the stator current q-axis component, the slip angular velocity of the motor is calculated, and the electrical angular velocity of the rotor flux is obtained by adding it to the motor speed estimated by the speed sensorless method. After passing an integral link The space phase of the rotor flux can be obtained;
[0030] (3) Coordinate transf...
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