| 摘要 |
PURPOSE:To reduce the torque pulsation by using the waveform obtained by the integration of the induction power of the detecting winding as a pattern of the winding current of a stator. CONSTITUTION:To the detecting windings 3A-3C the induction voltages EfA-EfC is induced synchronously with the induction voltages EA-EC of the stator windings 1A-1C. These induction voltages are inputted into multipliers 7A-7C through integrators 24A-24C and multiplied by the output of a speed control circuit 9. The outputs of the multipliers 7A-7C are led to addition circuits 8A-8C, where they are added together with the outputs related to the starting signals 15A-15C of a starting circuit 10. The outputs of the addition circuits 8A-8C are inputted to a servo pump composed of adders 6A-6C, amplifiers 5A-5C and current detectors 4A-4C. |
