| 摘要 |
<p>Currents Iu, Iv, Iw flowing through a synchronous motor are converted into a d-axis actual current Idfb and a q-axis actual current Iqfb on a rotating coordinate system rotating in synchronism with a rotor magnetic flux vector by using the actual position θ of the rotor of the synchronous motor. A d-axis simulated current Idob and a q-axis simulated current Iqob are estimated on the basis of the d-axis actual current Idfb, the q-axis actual current Iqfb, a d-axis actual voltage command Vdref, and a q-axis actual voltage command Vqref. The d-axis actual voltage command Vdref and the q-axis actual voltage command Vqref are generated from a d-axis current command Idref, a q-axis current command Iqref, the d-axis simulated current Idob, and the q-axis simulated current Iqob. The d-axis actual voltage command Vdref and the q-axis actual voltage command Vqref are converted to actual voltage command Vuref, Vvref, and Vwref by using the actual position θ of the rotor. Thus, a method and device for controlling the currents of a synchronous motor having good current response irrespective of influences such as temperature is realized.</p> |
