The primary elements of POWERMAG eddy current variable speed drive are an AC motor, an eddy current clutch, a tacho generator and a seperate small solid-state electronic controller. The eddy current clutch consists of two rotating members : a drum driven at constant speed by the AC motor and within the drum, a rotor output shaft which connected to the load. Torque is transmitted from the drum to the rotor shaft through an adjustable magnetic field that attracts the two members. The magnetic field is produced by a clutch coil typically below 2% of the total drive power requirements which means smaller and longer - life controller circuits can be used.

The primary elements of POWERMAG eddy current variable speed drive are an AC motor, an eddy current clutch, a tacho generator and a seperate small solid-state electronic controller. The eddy current clutch consists of two rotating members : a drum driven at constant speed by the AC motor and within the drum, a rotor output shaft which connected to the load. Torque is transmitted from the drum to the rotor shaft through an adjustable magnetic field that attracts the two members. The magnetic field is produced by a clutch coil typically below 2% of the total drive power requirements which means smaller and longer - life controller circuits can be used.