| 摘要 |
PURPOSE:To suppress a torque pulsation in a simple control circuit by correcting directly an inverter output voltage by a DC pulsating voltage signal, and further controlling a current reference signal by the pulsation to control the momentary pulsating torque at a constant value. CONSTITUTION:The output voltage of a diode converter 11 is detected by a secondary voltage detector 13, and added with the output signal of a current controller 9 as a reference input of a phase controller 10. Then, the output signal of the detector 13 is divided by a divider 12 by the output signal of a slip speed calculator 12A to detect the pulsating voltage signal of the momentary secondary voltage of a motor 3 of the amplitude irrespective of the slip. The output signal of a speed detector 8 is divided by the output signal of the divider 12 by a divider 8A to lead-out a current reference signal. |
