The DynaMotor™ Integrated Motor/Drive

GFCI Operation

The DynaMotor™ is the only AC variable speed technology able to operate on GFCI protected circuits. Conventional technologies utilizing Pulse Width Modulation have high ground currents due to capacitive coupling to ground as well as bearing current. The DynaMotor™ produces less than 1 mA ground current. The graph below illustrates DynaMotors™ ground current compared to three typical manufacturers of conventional single phase drives relative to the Class A GFCI limit.