Apparatus for sensing direction of rotation

Details Apparatus for sensing direction of rotation Apparatus for sensing direction of rotation

1986-12-02

1988-07-19

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318326, H02K 2300, G05B 500

Patent

active

047587695

ABSTRACT:
Direction of rotation of a device is sensed by means of a rotor which is coupled to the device and which carries at least two permanent magnets which are angularly spaced and present opposite magnetic poles to two sensors. One of the sensors is responsive to one only of the magnetic polarities to produce a voltage signal and the other sensor produces a voltage signal whose polarity is dependent on the polarity and direction of rotation of the magnet which induces that signal. The two detector voltage are compared and their correspondence or otherwise indicates the direction of rotation.

REFERENCES:
patent: 3678358 (1972-07-01), Kolatorowicz
patent: 4072881 (1978-02-01), Ban
patent: 4258299 (1981-03-01), Takeda

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