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GB1451825A - Stepping motor - Google Patents

Stepping motor

Info

Publication number
GB1451825A
GB1451825A GB1328674A GB1328674A GB1451825A GB 1451825 A GB1451825 A GB 1451825A GB 1328674 A GB1328674 A GB 1328674A GB 1328674 A GB1328674 A GB 1328674A GB 1451825 A GB1451825 A GB 1451825A
Authority
GB
United Kingdom
Prior art keywords
rotor
polepieces
degrees
air gap
polepiece
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.)
Expired
Application number
GB1328674A
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of GB1451825A publication Critical patent/GB1451825A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
    • H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
    • H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K37/16—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures having horseshoe armature cores
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C13/00—Driving mechanisms for clocks by master-clocks
    • G04C13/08—Slave-clocks actuated intermittently
    • G04C13/10—Slave-clocks actuated intermittently by electromechanical step advancing mechanisms
    • G04C13/11—Slave-clocks actuated intermittently by electromechanical step advancing mechanisms with rotating armature

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1451825 Electric motors DAINI SEIKOSHA KK 26 March 1974 [11 April 1973] 13286/74 Heading H2A A stepping motor comprises a cylindrical permanent magnet rotor 1 of diameter less than 2À5 mm., and two stator polepieces 2, 3, each having a part-cylindrical pole face, the two polepieces together encompassing at least 300 degrees of the circumference of the rotor, at least one of the part-cylindrical pole faces being eccentric with respect to the rotor axis so that the air gap is non-uniform in the circumferential direction. As shown the polepiece 2 is adjustable by means of screw 7 to vary the air gap and so give the rotor a preferred direction of rotation. The thickness of the stator polepieces in the axial direction is between 1 and 1À5 times the rotor axial thickness. The air gap 9 under the non-adjustable polepiece 3 is between 1 and 1À5 times the length of space 8 between the ends of the polepieces. The angle a shown is between 10 and 45 degrees and is preferably substantially 25 degrees.
GB1328674A 1973-04-11 1974-03-26 Stepping motor Expired GB1451825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4035273A JPS49127115A (en) 1973-04-11 1973-04-11

Publications (1)

Publication Number Publication Date
GB1451825A true GB1451825A (en) 1976-10-06

Family

ID=12578226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1328674A Expired GB1451825A (en) 1973-04-11 1974-03-26 Stepping motor

Country Status (9)

Country Link
JP (1) JPS49127115A (en)
AR (1) AR198456A1 (en)
BR (1) BR7402812D0 (en)
CH (1) CH512474A4 (en)
DD (1) DD110989A1 (en)
DE (1) DE2410745A1 (en)
FR (1) FR2225869A1 (en)
GB (1) GB1451825A (en)
IT (1) IT1003724B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111446835A (en) * 2019-01-11 2020-07-24 精工电子有限公司 Stator, stepping motor, movement for timepiece, and method of manufacturing stator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814144B2 (en) * 1975-09-23 1983-03-17 株式会社精工舎 Kogata motor
JPS5349215A (en) * 1976-10-15 1978-05-04 Matsushita Electric Works Ltd Step motor
DE3107283C2 (en) * 1981-02-26 1984-10-11 Naučno-issledovatel'skij institut časovoj promyšlennosti, Moskau/Moskva Single-phase miniature stepper motor
DE9201423U1 (en) * 1992-02-03 1992-04-16 Berliner TT-Bahnen, O-1055 Berlin Actuator for models

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111446835A (en) * 2019-01-11 2020-07-24 精工电子有限公司 Stator, stepping motor, movement for timepiece, and method of manufacturing stator

Also Published As

Publication number Publication date
IT1003724B (en) 1976-06-10
BR7402812D0 (en) 1974-12-03
DE2410745A1 (en) 1974-10-24
FR2225869A1 (en) 1974-11-08
DD110989A1 (en) 1975-01-12
AR198456A1 (en) 1974-06-21
JPS49127115A (en) 1974-12-05
CH512474A4 (en) 1977-07-29

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940325