JPS5568865A - Motor employing magnetic sensitive element - Google Patents

Motor employing magnetic sensitive element

Info

Publication number
JPS5568865A
JPS5568865A JP14234978A JP14234978A JPS5568865A JP S5568865 A JPS5568865 A JP S5568865A JP 14234978 A JP14234978 A JP 14234978A JP 14234978 A JP14234978 A JP 14234978A JP S5568865 A JPS5568865 A JP S5568865A
Authority
JP
Japan
Prior art keywords
magnetic
magnet
sensitive elements
magnetic field
motor
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
JP14234978A
Other languages
Japanese (ja)
Inventor
Seiji Yamashita
Shigeki Morinaga
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14234978A priority Critical patent/JPS5568865A/en
Publication of JPS5568865A publication Critical patent/JPS5568865A/en
Pending legal-status Critical Current

Links

Landscapes

  • Brushless Motors (AREA)

Abstract

PURPOSE:To lessen the fluctuation of revolution, by preventing the torque ripple of the motor wherein detecting signals are smoothed by arranging a magnetic material of specified dimensions among a magnet forming a magnetic field and magnetic sensitive elements for detecting the magnetic field of the magnet. CONSTITUTION:This motor is constituted in such a manner that a magnetic field of a magnet 3 is detected by means of magnetic, sensitive elements 91, 92, and the currents of a drive coil crossing with the magnetic field made up by means of the magnet 3 flow in response to the output signals of the magnetic, sensitive elements. A magnetic material 121, in which opposite area with the magnet 3 is wider than the sensitive portions of the magnetic, sensitive elements 91, 92, such as, a silicon steel plate, an iron plate, on which the formation of rust is obviated by spraying synthetic resin onto the surface, or the like is disposed among the magnet 3 and the magnetic, sensitive elements 91, 92. Thus, since magnetic flux with some width passes through the magnetic sensitive elements 91, 92, the local strength of the magnetic field due to the defects of the magnet 3 is eliminated, and signals produced in the magnetic sensitive elements 91, 92 can be smoothed.
JP14234978A 1978-11-20 1978-11-20 Motor employing magnetic sensitive element Pending JPS5568865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14234978A JPS5568865A (en) 1978-11-20 1978-11-20 Motor employing magnetic sensitive element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14234978A JPS5568865A (en) 1978-11-20 1978-11-20 Motor employing magnetic sensitive element

Publications (1)

Publication Number Publication Date
JPS5568865A true JPS5568865A (en) 1980-05-23

Family

ID=15313293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14234978A Pending JPS5568865A (en) 1978-11-20 1978-11-20 Motor employing magnetic sensitive element

Country Status (1)

Country Link
JP (1) JPS5568865A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5970174A (en) * 1982-10-14 1984-04-20 Takahashi Yoshiteru Superposition type brushless motor with armature coil groups not superposed
JPS6387162A (en) * 1986-09-26 1988-04-18 Ebara Corp Motor
US6127749A (en) * 1999-02-10 2000-10-03 Nikon Corporation Of Japan Two-dimensional electric motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5970174A (en) * 1982-10-14 1984-04-20 Takahashi Yoshiteru Superposition type brushless motor with armature coil groups not superposed
JPS6387162A (en) * 1986-09-26 1988-04-18 Ebara Corp Motor
US6127749A (en) * 1999-02-10 2000-10-03 Nikon Corporation Of Japan Two-dimensional electric motor
US6455956B1 (en) 1999-02-10 2002-09-24 Nikon Corporation Two-dimensional electric motor

Similar Documents

Publication Publication Date Title
EP0157470A3 (en) Magnetic field sensor
JPS5568865A (en) Motor employing magnetic sensitive element
JPS5662060A (en) Brushless dc motor
SE9101315D0 (en) KANTLAEGSEMAETARE
JPS57122326A (en) Contactless inspection system of object
JPS5337898A (en) Permanent magnet of enclosed construction
NO161762C (en) MAGNETIC TRANSDUCTOR DEVICE FOR MEASURING A POWER SPECIFIC TENSION RESISTANCE TO AN AGRICULTURAL TRACTOR.
JPS5783150A (en) Commutatorless motor
JPH03131717A (en) Linear position detection device
JPS5773618A (en) Linear displacement detecting method
JPS5631639A (en) Electromagnetic ultrasonic wave flaw detector
SU641277A1 (en) Sensitive element of signal inductive pickup
JPS5642312A (en) Demagnetization
JPS634987Y2 (en)
JPS5532427A (en) Circuit for driving motor
JPS562566A (en) Detecting method for rotation of motor
JPS5758222A (en) Magnetic head
JPS5563504A (en) Magnetic float controller
JPS6423113A (en) Magnetic encoder
JPS56107774A (en) Linear pulse motor
JPH0412652Y2 (en)
JPS6481650A (en) Flat type motor
JPS5736570A (en) Dc motor
JPS57132745A (en) Rotating speed detector for motor
JPS5788334A (en) Stress detector