| 摘要 |
PROBLEM TO BE SOLVED: To immediately activate a protection operation when an abnormal state of a semiconductor switching element mounted on an inverter device is detected.SOLUTION: An elevator control device 30 according to an embodiment comprises a voltage detection part 41, a voltage prediction part 42, an abnormality determination part 43 and a protection operation part 44. The voltage prediction part 42 predicts a current pattern of a current flowing in an IGBT 13a of an inverter device 13 on the basis of an operation pattern of an elevator car 4 to predict a Vce voltage value of the IGBT 13a on the basis of the predicted current pattern. The voltage detection part 41 detects the Vce voltage value of the IGBT 13a during operation of the elevator car 4. The abnormality determination part 43 compares the prediction value and the detection value of Vce to determine an abnormal state of the IGBT 13a. The protection operation part 44 performs a protection operation of the IGBT 13a on the basis of the determination results by the abnormality determination part 43.SELECTED DRAWING: Figure 1 |
