Patent ID: 6424061
Filing Date: 2002-07-23
Classification: H02K,Y10S

Abstract:
A stepping motor comprising:(a) a rotor being driven by exciting a driving coil, and a magnet mounted to said rotor, said rotor and magnet in a motor sub-assembly including said driving coil; (b) a position detector including a magnetic flux generator for outputting a signal of said rotor in the same phase as a polarity position of said magnet mounted to said rotor, and a magnetic sensor receiving a magnetic force from the magnetic flux generator; (c) a controller for controlling said stepping motor responsive to a position detection signal supplied from said position detector; (d) a board on which said magnetic sensor and said controller are mounted, said board spaced from said motor sub-assembly to avoid heat generated by said motor sub-assembly; and (e) a sensor cover for positioning said board with said magnetic sensor spaced from said motor sub-assembly, for dissipating heat of said controller, and for covering at least a part of said position detector and said controller.