| Abstract |
High speed induction motors with frequency control are increasingly applied on industrial drives, e.g. on high speed milling machines, compressors etc. The maximum power output and the speed as well are limited by increasing power losses and heating of the machine. The paper presents the results of comprehensive measurements and calculations considering different supply modes (sine wave, six step, PWM), different lengths of the motor air gap and different rotor designs. A novel calculation method for the inverter induced core losses is described. Suggestions for design and control of transistorized high speed induction motor drives are derived. |
