| 摘要 |
PROBLEM TO BE SOLVED: To suppress torque fluctuation at switching time between one pulse control and PWM control and to switch control instantaneously (or in short time).SOLUTION: When amplitude of actual voltage changes by switching control between PWM control and one pulse control, a voltage phase is simultaneously controlled by an angle with which a change of the amplitude of the actual voltage is compensated. A control amount of the voltage phase when the control is switched is determined in accordance with the voltage phase just before switching of the control. Thus, switching of control is instantaneously completed and torque fluctuation can be suppressed. |
