| 摘要 |
PURPOSE:To discriminate the cause of faults by estimating the disturbance torque of a motor in different aspects respectively based on the voltage, current and speed signals and by estimating the faulted region from each estimate. CONSTITUTION:A speed regulator(ASR) 7 outputs a current command I* in accordance with the deviation between a speed actual value N and a speed command N*. A current regulator(ACR) gives a voltage command V* in accordance with the deviation between a current actual value l and a current command I* to a striking pulse regulator 9. On the other hand, a state observer 10 estimates a plurality of disturbance torque mutually different taud1, taud2, taud3 based on the current actual value I, a speed actual value N and a voltage command V*. A fault diagnoser 11 detects the deviation between each disturbance torque taud1-taud3 and discriminates the fault state in accordance with these deviated states. |
