| 摘要 |
PURPOSE:To operate a plurality of motors with a maximum efficiency in the aggregate and to prevent the driving force from changing suddenly at the time of switching motors. CONSTITUTION:A necessary-for-running torque calculated on the basis of signals from an accelerator stroke sensor 12 and a rotation sensor 13 is inputted from a necessary-for-running torque calculating part 21 to a target sharing torque calculating part 22, and here a target sharing torque TA*, TB* for each motor for making the overall efficiency of a plurality of motors maximum is calculated. Each vector controlling part 23 receives a target sharing torque through a filter having the same transfer function, outputs a current command for three- phase alternating current from this torque and the signal omegare of the rotation sensor, and drives each motor with a PWM inverter 24. Accordingly, they are operated with a high efficiency always for a necessary torque, and moreover torque is changed smoothly without a torque ripple when the necessary torque changes. |
