Permanent magnet synchronous motor sensorless control method based on high-frequency signal injection
A permanent magnet synchronous motor and high-frequency signal technology, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem of reducing system control performance and other issues
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[0046] The present invention will be further described below in conjunction with the accompanying drawings.
[0047] The basic idea of the present invention is to obtain the optimal high-frequency current angle and the optimal high-frequency voltage angle based on the principle of minimizing the high-frequency ripple of the electromagnetic torque when distributing the high-frequency voltage components injected by the d-axis and the q-axis; When calculating the estimated value of the rotor position, the high-frequency current component of the control response is 0 at the orthogonal position of the optimal high-frequency current angle, so that the error of the estimated value of the rotor position is 0, thereby obtaining an accurate estimated value of the rotor position.
[0048] 1. Description of the basic principles
[0049] 1. Permanent magnet synchronous motor voltage equation and coordinate transformation
[0050] The mathematical model of permanent magnet synchronous mo...
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