DynaMotors (Cleveland, OH) has introduced the Model
56-2 DynaMotor, a single-phase, variable-speed electric motor
for air-moving, pumping, and other applications. The motor
features optional fan cooling, incorporates a NEMA 56 frame,
and is suitable for applications up to 2 HP and 800 to 4,800
RPM. The motor integrates a variable-speed drive with an AC
induction motor by embedding solid-state switches in the
armature of the motor. It will not trip ground fault interrupt
outlets, produces virtually no EMI/RFI, and eliminates voltage spikes and line voltage reflections.
The motor interfaces through a board that accepts 0-10V, serial, or other control signals.