GB2006540A - Dynamo Electromagnetic Machines: Magnetic Circuits - Google Patents

Dynamo Electromagnetic Machines: Magnetic Circuits

Info

Publication number
GB2006540A
GB2006540A GB7839029A GB7839029A GB2006540A GB 2006540 A GB2006540 A GB 2006540A GB 7839029 A GB7839029 A GB 7839029A GB 7839029 A GB7839029 A GB 7839029A GB 2006540 A GB2006540 A GB 2006540A
Authority
GB
United Kingdom
Prior art keywords
plates
reduced
employed
pole pieces
alternatively
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.)
Granted
Application number
GB7839029A
Other versions
GB2006540B (en
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.)
PA Management Consultants Ltd
Original Assignee
PA Management Consultants 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 PA Management Consultants Ltd filed Critical PA Management Consultants Ltd
Priority to GB7839029A priority Critical patent/GB2006540B/en
Publication of GB2006540A publication Critical patent/GB2006540A/en
Application granted granted Critical
Publication of GB2006540B publication Critical patent/GB2006540B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/145—Stator cores with salient poles having an annular coil, e.g. of the claw-pole type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • 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
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

In an electric machine of the kind described in British Patent Application No. 48794/74, iron losses are reduced by laminating the rotor backing plate (2, 4); an axial stack of insulated plates or a spiral lamination may be employed. Alternatively eddy current losses are reduced by forming the backing plates from sintered ferrite material and mounting either an array of discrete magnets or a magnetised ring therearound, or by replacing the backing plates (2, 4) and separate magnets with plates of sintered magnetic material, permanently magnetised to present alternate North and South poles therearound. Interpolar flux leakage is reduced by radially staggering the U-shaped pole pieces around the stator coil. In addition or alternatively differently shaped pole pieces may be employed, alternately, around the stator assembly (Figure 5). <IMAGE>
GB7839029A 1977-10-06 1978-10-03 Electromagnetic machines Expired GB2006540B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7839029A GB2006540B (en) 1977-10-06 1978-10-03 Electromagnetic machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4153977 1977-10-06
GB7839029A GB2006540B (en) 1977-10-06 1978-10-03 Electromagnetic machines

Publications (2)

Publication Number Publication Date
GB2006540A true GB2006540A (en) 1979-05-02
GB2006540B GB2006540B (en) 1982-12-22

Family

ID=26264700

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839029A Expired GB2006540B (en) 1977-10-06 1978-10-03 Electromagnetic machines

Country Status (1)

Country Link
GB (1) GB2006540B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563544A1 (en) * 1984-04-26 1985-10-31 Electro Mec Nivernais Washing machine or spin dryer having a rotor of the drive motor of the drum mounted directly on the shaft of this rotor
FR2639486A1 (en) * 1988-11-21 1990-05-25 Martire Roger Rotating machine with permanent magnets and magnetic flux looping
EP1458080A1 (en) * 2001-12-20 2004-09-15 Mitsubishi Denki Kabushiki Kaisha Permanent magnet type dynamo-electric machine and wind power generation-use permanent magnet type synchronous generator
RU2448404C1 (en) * 2011-02-24 2012-04-20 Евгений Константинович Пучкин Terminal electrical machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563544A1 (en) * 1984-04-26 1985-10-31 Electro Mec Nivernais Washing machine or spin dryer having a rotor of the drive motor of the drum mounted directly on the shaft of this rotor
FR2639486A1 (en) * 1988-11-21 1990-05-25 Martire Roger Rotating machine with permanent magnets and magnetic flux looping
EP1458080A1 (en) * 2001-12-20 2004-09-15 Mitsubishi Denki Kabushiki Kaisha Permanent magnet type dynamo-electric machine and wind power generation-use permanent magnet type synchronous generator
EP1458080B1 (en) * 2001-12-20 2017-03-01 Mitsubishi Denki Kabushiki Kaisha Permanent magnet type dynamo-electric machine and wind power generation-use permanent magnet type synchronous generator
RU2448404C1 (en) * 2011-02-24 2012-04-20 Евгений Константинович Пучкин Terminal electrical machine

Also Published As

Publication number Publication date
GB2006540B (en) 1982-12-22

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee