What are the limitations of stepped wave inverters?

All Questions › Category: Electrical Industrial Drives › What are the limitations of stepped wave inverters?
0 Vote Up Vote Down
Chetan Shidling Staff asked 5 years ago

I need short info.

1 Answers
0 Vote Up Vote Down
Chetan Shidling Staff answered 5 years ago

The limitations of stepped wave inverters are:

  1. The presence of low frequency harmonics-increases motor losses at all speeds-required to derates the motor.
  2. Develops pulsating torques due to 5th, 7th, 11th and 13th harmonics-cause jerky motion of rotor at low speeds.
  3. At low speeds, harmonic content will increases-machine saturates at light loads due to high (V/f) ratio-causes overheating of the machine at low speeds.