| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device of an electric motor, capable of reducing the burden of processing of estimating a rotor angle and a rotor phase difference. <P>SOLUTION: The control device is provided with: a first rotor angle estimated value calculating section 85 for calculating a first rotor angle estimated value θm_e1 based on detection voltages Δvd, Δvq and a d-axis current detection value Id_s and a q-axis current detection angle Iq_s when detection voltages are superimposed; an induction voltage constant estimated value calculating section 81a for calculating a first induction voltage constant estimated value Ke_e1 based on reference values L0, L1 of the electric motor 1 which are calculated in accordance with the calculation processing of the first rotor angle estimated value θm_e1 by the first rotor angle estimated value calculating section 85, the d-axis current detection value Id_s and the q-axis current detection value Iq_s; and a rotor phase difference control section 95a for causing the rotor phase difference changing means 27 to change the rotor phase difference so as to reduce deviation ΔKe between the induction voltage constant command value Ke_c and the first induction voltage estimated value Ke_e1. <P>COPYRIGHT: (C)2010,JPO&INPIT |
