| 摘要 |
PURPOSE:To suppress torque ripple when the exciting phase of a reluctance motor is switched by switching the exciting phase when the electric angle reaches an exciting phase switching angle and altering the exciting phase switching angle reversely to the advancing direction of motor thereby reducing the differential torque before and after switching the exciting phase. CONSTITUTION:A current command icmd from a PI compensation block 1 is fed from a PWM amplifier 4 through a current detection block 8 to an exciting phase switching block 2 while subtracting a current to be fed back. The exciting phase switching block 2 switches the exciting phase by applying the current command icmd and a differential current command of feedback current. The switching block 2 detects a rotor passing the exciting phase switching angle and compares an electric angle, obtained through a rotary encoder 6 and an electric angle detection block 9, with the exciting phase switching angle. When the electric angle passes a set phase switching angle, the exciting phase is switched. |
