| Abstract |
Slip recovery drives are popular because they have low life-time cost. For limited ranges of speed control they represent one of the most cost-effective adjustable speed drives. By introducing an improved slip power control, some new qualities have been added to this type of drive. Non-torque producing circulating currents in the d.c. link are eliminated and it will be possible to maintain control over the drive during power supply disturbances. As a result of the improved control system, a number of application advantages such as savings in equipment size, operating losses, power consumption and production continuity are made available to the drive user. |
