| 摘要 |
PROBLEM TO BE SOLVED: To detect abnormality such as erroneous wiring of an induction motor.SOLUTION: An induction motor control device comprises: one or more induction motors 101-104; a torque control section which stops torque control of the induction motors 101-104 in response to a test command (t), applies a fixed voltage in a sinusoidal wave shape to the induction motors 101-104 and allows currents to flow; current detection sections 201-204 for detecting the currents inputted to the induction motors 101-104; a current vector calculation section 5 for calculating rotation directions of current vectors i1-i4 of the currents inputted to the induction motors 101-104; and a rotation direction abnormality detection section 6 for detecting that any one of the rotation directions of the current vectors i1-i4 is abnormal. |
