A New Stepmotor Design Boosts Efficiency and Reduces Noise and Vibration

A stepmotor divides a full rotation into a large number of steps instead of rotating continuously like a regular electric motor. They are very useful in positioning systems particularly in digitally controlled servo systems. A hybrid stepmotor design enhances the magnetic field on the surface of each rotor cup delivering higher torque. Hybrid stepmotors combine the controllability of the variable reluctance motor with the higher torque of the permanent magnet or "canstack" motor. New construction techniques now allow designers use prime-ratio laminations that improve efficiency, lower audible noise, and reduce operating temperatures over standard hybrid stepmotors. Hybrid stepmotors are constructed with thin sheet-iron laminations layered one on top of another to form the stator and rotator stacks. The motor can operate at a cooler temperature because of the improved efficiency and increased surface area of the stator stack. The cooler motor temperature will reduce the amount of heat given off to the equipment in which it operates and subsequently create a more efficient environment.