Motor driving apparatus

A motor driving apparatus capable of drivingly controlling a plurality of inverter units (IV1-IV4) with a single motor driving command S from a motor control unit (1), to thereby control a large-capacity motor or the like. The motor control unit (1) sends out a single motor driving command (torque command) S. An intermediary unit (3) obtains motor driving commands SxA1 to SxA4 for the inverter units (IV1-IV4) by multiplying the motor driving command S by each of coefficients A1 to A4 set in advance. The inverter units (3) are fed with the motor driving commands SxA1 to SxA4 individually and drive a single motor (2). Since the motor (2) is driven by the total current supplied by the inverter units (IV1-IV4), the motor can generate a large torque. The motor control unit (1) only needs to generate a single motor driving command S, and hence only needs to operate a single processing part. Alternatively, the single motor (2) may be replaced by a plurality of motors, each associated with a respective one of the inverter units (IV1 to IV4). Also, the intermediary unit (3) may generate the individual motor driving commands in the form of parallel or serial data.