Device for detecting motor speed of automatic washing machine

Details Device for detecting motor speed of automatic washing machine Device for detecting motor speed of automatic washing machine

1994-11-30

1996-11-19

O'Shea, Sandra L.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

32420725, 3242072, 68 1216, G01P 348, D06F 3300

Patent

active

055766200

ABSTRACT:
A device for detecting motor speed of an automatic washing machine suitable for controlling the motor speed in accordance with different kinds of laundry and for improving washing effect of the washing machine. The motor speed detecting device includes a motor speed detecting unit interposed between a support plate and a motor unit. The motor speed detecting unit is cased by a detecting unit casing and has a gear type detecting member mounted to the motor shaft, a rectangular base plate interiorly mounted to a side wall of the detecting unit casing, a magnet mounted to the base plate and generating a magnetic line of force and scanning the magnetic line of force on the detecting member, and a Hall effect linear sensor mounted to the magnet and sensing change of density of line of magnetic force.

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patent: 5210489 (1993-05-01), Petersen
patent: 5293760 (1994-03-01), Tani et al.

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