| 摘要 |
PURPOSE:To reduce the torque pulsation in the current pattern of the stator winding by using the induction voltage waveform of winding for detection and by flowing the analogous current to this induction voltage. CONSTITUTION:On the stator side, windings for detection 3A-3C are wound in addition to the stator windings 1A-1C. These windings for detection 3A-3C are arranged so that the induction voltages E fA-E fC induced thereby may be in the same phase as in the induction voltages EA-EC related to the phase induction voltages of the stator windings 1A-1C. A speed control output signal 16, the PLL output signal of a PLL circuit 9, and the induction voltages E fA-E fC related to the signals of windings for detection 3A-3C are multiplied by the multipliers 7A-7C. Thus the waveform of the stator winding current and that of the induction voltage of the winding for detection are controlled so as to be analogous. |
