| 摘要 |
<P>PROBLEM TO BE SOLVED: To inexpensively provide a multiple system motor drive apparatus. <P>SOLUTION: In a motor drive apparatus 2 having two power supply systems for driving a motor 80, output currents supplied from inverters 601, 602 and detected by current sensors 751, 752 are added, for each phase. Sums Iu, Iv. Iw of the output phase currents are fed back to a 3-2 phase conversion section 25 and are subjected to coordinate transformation. A 2-3 phase conversion section 35 branches and outputs the same three-phase voltage command values PWMu, PWMv, PWMw to the two inverters 601, 602. Thus, the 3-2 phase conversion section 25 and the 2-3 phase conversion section 35 are both reduced to 1 in number, which is less than 2 of the inverters. Thus, a computational load on a microcomputer is reduced and the motor drive apparatus 2 having two power supply systems is provided inexpensively. <P>COPYRIGHT: (C)2011,JPO&INPIT |
