SPEED DETECTOR FOR USE WITH MINIATURE DC MOTOR

摘要

TITLE OF THE INVENTION: Speed Detector for use with Miniature DC Motor A speed detector for use with a miniature DC motor is disclosed wherein means such as coils or Hall generators for detecting the magnitude and direction of leakage flux are placed in opposed relation with at least one pair of field poles of the DC motor, so that the output signal of a frequency in proportion to the number of slots of the armatur or in proportion to twice as much as thereof may be derived.