| 摘要 |
PURPOSE:To eliminate the influence of a counterelectromotive force to an armature current control by adding a voltage command value obtained by the calculations of a mean field current and a mean rotating speed to the original voltage command value to be applied as an armature current control rectifier voltage command value. CONSTITUTION:A control block 33 multiplies by a multiplier 35 a mean rotating speed omega and a magnetic flux Kphi value obtained by the field current of a separately-excited motor If to magnetic flux Kphi characteristic 34 using a mean field current If' to obtain the mean counterelectromotive force EA of 3 separately-excited motors. The mean counterelectromotive force EA is input through an amplifier 36 to a controller 20 as the correction voltage command value Vp of an armature current control rectifier 4. The controller 20 adds the original voltage command value Vp output from a P-I control unit 32 and the correction voltage command value Vp, and applies it as the voltage command value of the rectifier 4. |
