Patent ID: 9735715
Date: 2017-08-15
CPC Classifications: H02M,H02P

Claim:
1. A controller configured to coupled to an electric motor, the controller comprising: a rectifier configured to convert an alternating current (AC) input voltage received from a power source to a direct current (DC) link voltage; a DC link capacitor coupled to an output of the rectifier and having a capacitance below 10 μF, the DC link capacitor configured to receive the DC link voltage, wherein the DC link voltage drops to a value of approximately zero during each cycle when the AC input voltage transits a value of zero; an inverter coupled to an output of the DC link capacitor and comprising a plurality of switches configured to condition the DC link voltage to output an AC voltage for driving the electric motor; and a processor coupled to the DC link capacitor and the inverter, said processor programmed to: