Eliminate Noise from a Motor with an Inverter

Inverters rectify ac to dc then chop it up again with transistors to provide a variable frequency, variable voltage pseudo ac to create a variable speed motor from a fixed speed ac motor. This chopping takes place many times a second from around 1kHz to 16kHz. This is the switching frequency. At lower switching frequencies, the inverter losses reduce (lower number of power consuming transistor switches) but the motor losses increase (cruder voltage waveform). The…