GB1331396A - Electric motor - Google Patents

Electric motor

Info

Publication number
GB1331396A
GB1331396A GB364472A GB364472A GB1331396A GB 1331396 A GB1331396 A GB 1331396A GB 364472 A GB364472 A GB 364472A GB 364472 A GB364472 A GB 364472A GB 1331396 A GB1331396 A GB 1331396A
Authority
GB
United Kingdom
Prior art keywords
field
rotor
teeth
stator
cores
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
GB364472A
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 GB1331396A publication Critical patent/GB1331396A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/20—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar machine
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C15/00—Clocks driven by synchronous motors
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/16—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating an electro-dynamic continuously rotating motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
    • 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
    • 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
    • H02K37/20—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 rotating flux distributors, the armatures and magnets both being stationary

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Motors (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

1331396 Electric motors; core constructions DAINI SEIKOSHA KK 26 Jan 1972 [26 Feb 1971 12 April 1971 12 May 1971 19 May 1971(2) 6 Dec 1971 14 Dec 1971] 3644/72 Heading H2A In an electric motor comprising a rotor 10 having a plurality of equiangularly spaced apart teeth on its circumferential surface interacting within a stator comprising a plurality of electromagnet assemblies e.g. 22, 23, each having a pair of toothed field cores, 24, 25 and 26, 27, and in which the teeth on each field core have the same pitch as the rotor teeth and the teeth on successive cores are staggered by a fraction of the tooth pitch, a steady magnetic field is produced in the field cores and rotor and the electromagnets produce a superimposed field which together with the steady field produces an effective field having a maximum value in the various cores in succession, so causing the rotor to rotate. The steady field may be provided by a permanently magnetized stator, as shown, or a permanently magnetized rotor, Fig. 8 (not shown). Alternatively, either the stator or rotor may be magnetized by an electromagnet. The electromagnet assemblies producing the superimposed field may be energized by phase displaced alternating currents or by amplitude modulated pulse signals having a sinusoidal envelope, Fig. 15 (not shown). Either the rotor or stator teeth may have grooves, Figs. 10, 11 (not shown), through which the teeth of the other member pass to improve the magnetic coupling.
GB364472A 1971-12-14 1972-01-26 Electric motor Expired GB1331396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10066871A JPS4864414A (en) 1971-12-14 1971-12-14

Publications (1)

Publication Number Publication Date
GB1331396A true GB1331396A (en) 1973-09-26

Family

ID=14280143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB364472A Expired GB1331396A (en) 1971-12-14 1972-01-26 Electric motor

Country Status (2)

Country Link
JP (1) JPS4864414A (en)
GB (1) GB1331396A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4915913A (en) * 1972-06-09 1974-02-12
DE2429492C3 (en) * 1974-06-20 1979-04-26 Elmeg-Elektro-Mechanik Gmbh, 3150 Peine Electric motor that can be operated step by step or continuously, in particular a step motor for driving a roller counter
EP2345141B1 (en) * 2009-09-08 2019-03-06 Moog Inc. Stepping motor able to create small increments

Also Published As

Publication number Publication date
JPS4864414A (en) 1973-09-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee