Patent ID: 7459877

Claim:
A solid state AC motor starter with DC power source comprising: a DC input; a capacitor input filter connected across the DC input; a power bridge comprising: at least six gates respectively having a gate output individually switchable between an on and off state; a power bridge output having three phases, each phase of the bridge output being connected to respective combinations of the gate outputs; a capacitor filter connected across each phase of the three phase output; an AC power logic circuit for controlling the timing of the switching on and off of the states of the respective gates at a higher frequency than the desired bridge output and varying the duration of the on state of the respective gates so that an output voltage of the three phases can be made to approximate a sine wave using pulse width modulation; and an AC motor starter circuit having an AC power input connected to the power bridge output; wherein the AC motor starter circuit includes a motor starter logic circuit that has an open signal input, a close signal input and a run signal input wherein a run signal and either an open signal or a close signal must be present at the corresponding run signal input and open signal input or close signal input for the motor starter circuit to be in an on state to actuate a motor.