JPS5657955A - Revolution detector - Google Patents

Revolution detector

Info

Publication number
JPS5657955A
JPS5657955A JP13402679A JP13402679A JPS5657955A JP S5657955 A JPS5657955 A JP S5657955A JP 13402679 A JP13402679 A JP 13402679A JP 13402679 A JP13402679 A JP 13402679A JP S5657955 A JPS5657955 A JP S5657955A
Authority
JP
Japan
Prior art keywords
permanent magnet
coil
rotor
binding
powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13402679A
Other languages
Japanese (ja)
Inventor
Hiroaki Takase
Daizaburo Kubota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13402679A priority Critical patent/JPS5657955A/en
Publication of JPS5657955A publication Critical patent/JPS5657955A/en
Pending legal-status Critical Current

Links

Landscapes

  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

PURPOSE: To improve the accuracy of revolution detection owing to the variances in the sizes of a coil bobbin and an annular permanent magnet by binding the powder of permanent magnet by means of a synthetic resin and forming the coil bobbin and annular permanent magnet into one piece.
CONSTITUTION: A resin magnet material 16 binding the powder of ferromagnetic material by means of a synthetic resin is magnetized in a vertical direction and grooves for winding a coil 13 are provided on the outside circumference thereof. This platelike member 16 is fixed 11 to the posts 9 fixed to a substrate 1 in such a manner as to be sandwiched by discs 7, 8 comprising a soft magnetic material. When a rotor 14 rotates and the magnetic resistance of the magnetic circuit by the tooth profile part 8a of the disc 8 and the tooth profile part 14a of the rotor 14 changes, the signal corresponding to the number of revolutions is obtained from the coil 13.
COPYRIGHT: (C)1981,JPO&Japio
JP13402679A 1979-10-16 1979-10-16 Revolution detector Pending JPS5657955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13402679A JPS5657955A (en) 1979-10-16 1979-10-16 Revolution detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13402679A JPS5657955A (en) 1979-10-16 1979-10-16 Revolution detector

Publications (1)

Publication Number Publication Date
JPS5657955A true JPS5657955A (en) 1981-05-20

Family

ID=15118632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13402679A Pending JPS5657955A (en) 1979-10-16 1979-10-16 Revolution detector

Country Status (1)

Country Link
JP (1) JPS5657955A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58125867U (en) * 1982-02-18 1983-08-26 ソニー株式会社 Capstan shaft rotation detection device
JPS58168875U (en) * 1982-05-06 1983-11-10 松下電器産業株式会社 frequency generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58125867U (en) * 1982-02-18 1983-08-26 ソニー株式会社 Capstan shaft rotation detection device
JPS58168875U (en) * 1982-05-06 1983-11-10 松下電器産業株式会社 frequency generator

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