MOTOR DRIVE DEVICE

Provided is a motor driving apparatus that makes it possible to effectively reduce a leakage current without addition of a device detecting the leakage current. The motor driving apparatus according to the present invention includes a first motor group including a number N of individual servo motors 3A, a second motor group including a number N of individual second servo motors 3B that are driven in synchronization with the servo motors 3A, and an inverter control unit 17. The inverter control unit 17 controls a first switching total value M1 and a second switching total value M2 to be reversed in positive (+)/negative (-) sign. The first switching total value M1 is obtained by subtracting the number of semiconductor switching devices opened in circuit on low potential side from the number of semiconductor switching devices opened in circuit on first high potential side, corresponding to the first motor group. The second switching total value M2 is obtained by subtracting the number of semiconductor switching devices opened in circuit on high potential side from the number of second switching elements opened in circuit on low potential side, corresponding to the second motor group.