| 摘要 |
<p>The assembly has a control device controlling speed of an electric driving motor. The control device includes a frequency converter, is designed such that a weakened field is increased by the speed of the driving motor, and is generated in a control range (S3). The driving motor is provided with a permanent magnetic-rotor. The control device is designed such that the weakened field is generated, and a load angle of power is increased above 90 degree compared to a magnetic field of rotor, so that current and an induced counter voltage (E) does not exceed in a phase.</p> |
