| 摘要 |
The present invention discloses an inductance parameter identification method for a synchronous motor and an implementation system thereof, The method includes: determining the position of the rotor magnetic pole axis of the synchronous motor and obtaining direct-quadrature (d-q) axes; injecting a high-frequency voltage or current signal having a predetermined amplitude to the d-axis of the synchronous motor; obtaining the amplitude of a feedback high-frequency current or voltage component that has the same frequency as the injected high-frequency voltage or current of a feedback high-frequency current or voltage at the d-axis; and calculating d-axis inductance L d according to the amplitude of the feedback high-frequency current or voltage component at the d-axis. The present invention is easy to implement. It imposes no high requirements on the accuracy of the sampling of the feedback current from the synchronous motor. The frequency and amplitude of the high-frequency voltage signal injected to the synchronous motor are easy to control. Moreover, the d-axis inductance and q-axis inductance of the synchronous motor can be directly identified, whether the shaft of the synchronous motor is free or braked, without affecting the accuracy of identification. |
