A PWM switching scheme is used with three phase inverter to
- A. reduce low order harmonics and increase high order harmonics
- B. minimize the load on the DC side.
- C. increase the life of the batteries.
- D. reduce the total harmonic distortion with modest filtering
Answer: A. reduce low order harmonics and increase high order harmonics
Explanation: PWM switching techniques push harmonic energy to high frequencies (around carrier frequency and its sidebands) while eliminating or reducing low-order harmonics, greatly simplifying filtering requirements.