JPS5716567A - Linear dc motor - Google Patents

Linear dc motor

Info

Publication number
JPS5716567A
JPS5716567A JP8779080A JP8779080A JPS5716567A JP S5716567 A JPS5716567 A JP S5716567A JP 8779080 A JP8779080 A JP 8779080A JP 8779080 A JP8779080 A JP 8779080A JP S5716567 A JPS5716567 A JP S5716567A
Authority
JP
Japan
Prior art keywords
magnets
linear
magnetic
circuits
coil
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
JP8779080A
Other languages
Japanese (ja)
Inventor
Takehiro Yoshimura
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP8779080A priority Critical patent/JPS5716567A/en
Publication of JPS5716567A publication Critical patent/JPS5716567A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Linear Motors (AREA)

Abstract

PURPOSE:To cover the decrease in the characteristics of a permanent magnet by providing an auxiliary coil in a magnetic circuit of a linear DC motor and varying a current flowing through the coil in response to the temperature rise. CONSTITUTION:Permanent magnets 3A, 3B are provided at both ends of yokes 1A, 1B, auxiliary coils 4A, 4B are respectively wound on the magnets 3A, 3B, and a thermistor 5 is mounted in the vicinity of the magnet 3A. Magnetic circuits 6A, 6B which have circuits from the magnets 3A, 3B, through the yoke 1A, a gap G and a yoke 1B to the magnets 3A, 3B are ordinary formed, and a thrust is produced by the action of the magnetic circuits and the current flowing through a movable coil 2. When the temperature of a linear DC motor increases, the resistance of the thermistor 5 will vary, and the currents flowing through the coils 4A, 4B will increase. In this manner, the magnetic fluxes generated in the magnetic circuits 6A, 6B can be maintained constantly even if the temperature varies.
JP8779080A 1980-06-30 1980-06-30 Linear dc motor Pending JPS5716567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8779080A JPS5716567A (en) 1980-06-30 1980-06-30 Linear dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8779080A JPS5716567A (en) 1980-06-30 1980-06-30 Linear dc motor

Publications (1)

Publication Number Publication Date
JPS5716567A true JPS5716567A (en) 1982-01-28

Family

ID=13924769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8779080A Pending JPS5716567A (en) 1980-06-30 1980-06-30 Linear dc motor

Country Status (1)

Country Link
JP (1) JPS5716567A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992004721A1 (en) * 1990-08-31 1992-03-19 Bruno Gruber Electromagnetic regulating device
EP0571128A1 (en) * 1992-05-19 1993-11-24 Caterpillar Inc. A motor having temperature compensation
US6024791A (en) * 1993-03-25 2000-02-15 Mitomo Shoji Kabushiki Kaisha Molded bodies of cement type admixed and kneaded material having excellent bending strength and compression strength and a method of manufacturing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992004721A1 (en) * 1990-08-31 1992-03-19 Bruno Gruber Electromagnetic regulating device
EP0571128A1 (en) * 1992-05-19 1993-11-24 Caterpillar Inc. A motor having temperature compensation
US6024791A (en) * 1993-03-25 2000-02-15 Mitomo Shoji Kabushiki Kaisha Molded bodies of cement type admixed and kneaded material having excellent bending strength and compression strength and a method of manufacturing the same

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