Rate of rotation measurement using back-EMFS associated with win

Details Rate of rotation measurement using back-EMFS associated with win Rate of rotation measurement using back-EMFS associated with win

1998-07-27

2000-07-04

Strecker, Gerard

Electricity: measuring and testing

Electrical speed measuring

Including motor current or voltage sensor

32420725, 310 68B, G01P 346, H02K 1100

Patent

active

060843985

ABSTRACT:
A system and method are provided for measuring rate of rotation. A brushless DC motor is rotated and produces a back electromagnetic force (emf) on each winding thereof. Each winding's back-emf is integrated and multiplied by the back-emf associated with an adjacent winding. The multiplied outputs associated with each winding are combined to produce a directionally sensitive DC output proportional only to the rate of rotation of the motor's shaft.

REFERENCES:
patent: 4017726 (1977-04-01), Skutecki
patent: 4868497 (1989-09-01), Wallrafen
patent: 5321342 (1994-06-01), Kruse
patent: 5394102 (1995-02-01), Mori et al.

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