| 摘要 |
PURPOSE:To feed current according to a current command even for a high induced voltage, by applying compensation corresponding to the gain of an output from a current amplifier and the frequency characteristic of phase onto the current command. CONSTITUTION:A compensation value Ke.NFB/A1 proportional to the motor speed is applied to a torque command Tref, then a sine value sintheta of a rotor phase theta is multiplied to produce a current command Iref. Here, NFB is a motor speed, and Ke is an induced voltage constant. Furthermore, a correction value Ke.NFB.aNSin(theta+bn)/A1 is applied onto the current command Iref corresponding to the gaing A1 of a current amplifier, reciprocal aN thereof, rotor phase theta, a signal (bn) having inverted sign, and the motor speed NFB; then the result is fed to the current amplifier. Consequently, current can be fed according to the current command even for a high induced voltage. |
