| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress an overcurrent of a motor 50 when an electric vehicle is slipped, and to suppress the reduction of torque. <P>SOLUTION: This motor control device of the electric vehicle includes a map for setting a voltage waveform applied to the motor 50 according to the number of revolutions N of the motor 50 for driving the electric vehicle and a torque command value Trqcom to a rectangular waveform or a non-rectangular waveform, and controls the motor 50 on the basis of the map. When it is determined that the electric vehicle has been slipped, the motor control device sets a rectangular prohibition region A for prohibiting the application of a rectangular waveform into a region in which the rectangular waveform of the map is applied, and when the number of revolutions N of the motor 50 and the torque command value Trqcom are brought into the rectangular prohibition region A, the motor control device switches the voltage waveform applied to the motor 50 to the non-rectangular waveform from the rectangular waveform, and switches a control method of the motor 50 to weaker magnetic field control from the maximum torque control. <P>COPYRIGHT: (C)2013,JPO&INPIT |
