Motor and generator winding services suppliers specialize in producing custom motors, generators and custom windings per customer specifications, as well as companies that specialize in motor repair and refurbishing.  Motor types that are commonly wound by suppliers of motor and generator winding services include brushless motors, brush motors, linear motors, power generators, servo motors, stepper motors, switch reluctance motors, torque motors, and traction motors.  Motors can be single phase or polyphase (3-phase).  A single phase motor has a single alternating current source.  A three phase or polyphase motor is for use with three-phase power, motors provide efficient service for moderate to hard to start equipment such as pumps, blowers, and air-compressors.  Common applications serviced by suppliers of motor and generator winding services include avionics and aerospace, automotive, industrial, marine, medical, military, motion control, and power generation.