Patent ID: 6707227
Filing Date: 2004-03-16
Classification: H02K

Abstract:
A rotor for an alternator comprising:a coil assembly defined by a bobbin and a field coil, the coil assembly having first and second ends; the bobbin having a cylinder and opposing first and second end caps corresponding the first and second ends of the coil assembly; the field coil being wound onto the bobbin between the first and second end caps, the field coil defining an outer diameter; first and second pole pieces positioned at the first and second ends of the coil assembly and encasing the coil assembly therebetween, the first and second pole pieces each having pole fingers extending axially to define an inner diameter; a shaft fit through the first and second pole pieces and connected thereto to maintain the position of the first and second pole pieces relative to the coil assembly; and the outer diameter of the field coil being greater than the inner diameter of the first and second pole pieces for frictional engagement of the coil assembly to the first and second pole pieces.