Rotation detection or speed pickup device for miniature d-c moto

Details Rotation detection or speed pickup device for miniature d-c moto Rotation detection or speed pickup device for miniature d-c moto

1988-09-09

1990-04-03

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Field control, or field and armature control, by analog...

324164, 310 68B, 310154, 388912, G05B 500

Patent

active

049147137

ABSTRACT:
In order to pick up in a simple manner which is reliable, and under rough operating conditions, a rotation of the rotor in a miniature motor excited by permanent magnets with magnet segments at a tangential distance with magnet segments distributed at the bore circumference of the stator, it is proposed to arrange in at least one pole gap between the magnet segment a measuring coil. A signal is induced by the pulsation of the stray field due to rotation of the rotor. The measuring coil is advantageously arranged in a non-magnetic, preferably plastic support body held between the individual poles or the magnet segments respectively.

REFERENCES:
patent: 3466477 (1969-04-01), Newill
patent: 3882366 (1975-05-01), Clunis
patent: 3916278 (1975-10-01), Curell et al.
patent: 4082968 (1978-04-01), Jones
patent: 4093882 (1978-06-01), Furuta
patent: 4326153 (1982-04-01), Contri
patent: 4766359 (1988-08-01), Smith et al.
Patent Abstracts of Japan, Band 10, Nr. 213 (E-422) [2269], 25, Jul. 1986; and JP-A-61 52 126 (Matsushita) Electric Ind. Co. Ltd) 14.03, 1986, * Die Ganze Zusammenfassung*.
Patent Abstracts of Japan, Band 9, Nr. 295 (E-360) [2018], Denko K.K.) 18.07.1985, *Die ganze Zusammenfassung*.

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