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 explained below in conjunction with the 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 when distributing the high-frequency voltage components injected by the d-axis and the q-axis, based on the principle of minimizing the electromagnetic torque high-frequency ripple; When calculating the rotor position estimation value, 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 rotor position estimation value error is 0, so as to obtain an accurate rotor position estimation value.
[0048] 1. Basic principle description
[0049] 1. Permanent magnet synchronous motor voltage equation and coordinate transformation
[0050] The mathematical model of the permanent magnet synchronous motor can be written in matrix form or complex vector form. F...
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