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GB1475792A - Brushless direct current motor - Google Patents

Brushless direct current motor

Info

Publication number
GB1475792A
GB1475792A GB340777A GB340777A GB1475792A GB 1475792 A GB1475792 A GB 1475792A GB 340777 A GB340777 A GB 340777A GB 340777 A GB340777 A GB 340777A GB 1475792 A GB1475792 A GB 1475792A
Authority
GB
United Kingdom
Prior art keywords
sensor
motor
rotor
disc
coils
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
GB340777A
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.)
Union Special Corp
Original Assignee
Union Special Corp
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
Priority claimed from US00359870A external-priority patent/US3832613A/en
Application filed by Union Special Corp filed Critical Union Special Corp
Publication of GB1475792A publication Critical patent/GB1475792A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/12—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using detecting coils using the machine windings as detecting coil

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Power Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Brushless Motors (AREA)

Abstract

1475792 Electric motors UNION SPECIAL CORP 10 May 1974 [14 May 1973] 03407/77 Divided out of 1475791 Heading H2A A brushless D.C. motor includes a permanent magnet rotor, three position indicating devices rotatable with the rotor and three sensors, one cooperating with each of the position indicating devices. The first sensor is used to control the motor rotational speed, the second sensor, which is fixed, is used to stop the motor in a given position, and the third sensor, whose position is adjustable, is used to stop the rotor in the selected, adjustable position. In the embodiment, the position indicating devices are formed from metallic segments on a disc that is attached to the rotor, and the sensors are coils that are either on a disc fixed to the motor frame or (for the third sensor) on a manually adjustable disc. The coils form part of a resonant circuit that is detuned by the segments passing the coils, and used in a sewing machine motor speed or stopping position control system (see Division G3).
GB340777A 1973-05-14 1974-05-10 Brushless direct current motor Expired GB1475792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00359870A US3832613A (en) 1973-05-14 1973-05-14 Sewing machine motor and control circuit

Publications (1)

Publication Number Publication Date
GB1475792A true GB1475792A (en) 1977-06-10

Family

ID=23415631

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2068274A Expired GB1475791A (en) 1973-05-14 1974-05-10 Control system for a brushless direct current motor
GB340777A Expired GB1475792A (en) 1973-05-14 1974-05-10 Brushless direct current motor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB2068274A Expired GB1475791A (en) 1973-05-14 1974-05-10 Control system for a brushless direct current motor

Country Status (8)

Country Link
JP (1) JPS5523637B2 (en)
CA (1) CA1019423A (en)
CH (1) CH586306A5 (en)
DE (1) DE2421589B2 (en)
ES (1) ES425624A1 (en)
FR (1) FR2229796B1 (en)
GB (2) GB1475791A (en)
IT (1) IT1013132B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS512019A (en) * 1974-06-22 1976-01-09 Iwatani & Co Ekikagasuyokikarano kitaigasutoridashisochi
JPS54102611A (en) * 1978-01-31 1979-08-13 Iwatani & Co Vaporizing method and apparatus for liquified gas with atmospheric heat as source
JPS596498A (en) * 1982-06-30 1984-01-13 Kagura Seisakusho:Kk Liquefied gas evaporation device utilizing atmospheric heat
JPS62266098A (en) * 1986-11-18 1987-11-18 ブラザー工業株式会社 Sewing machine drive control device
JPS6365893A (en) * 1987-04-17 1988-03-24 株式会社日立製作所 Control of electromotive sewing machine
JPH0685606U (en) * 1993-05-24 1994-12-13 恒 福村 Hair dryer
WO2009029019A1 (en) 2007-08-30 2009-03-05 Vsm Group Ab Positioning of stitch data objects
WO2009061258A1 (en) 2007-11-09 2009-05-14 Vsm Group Ab Thread cut with variable thread consumption in a sewing machine
US8606390B2 (en) 2007-12-27 2013-12-10 Vsm Group Ab Sewing machine having a camera for forming images of a sewing area
CN102277696B (en) 2010-06-09 2015-03-11 Vsm集团股份公司 Feeder movement compensation
US8960112B2 (en) 2013-02-01 2015-02-24 Vsm Group Ab Stitching system and method for stitch stop embellishments

Also Published As

Publication number Publication date
AU6647874A (en) 1975-09-11
FR2229796B1 (en) 1977-10-14
ES425624A1 (en) 1976-06-16
GB1475791A (en) 1977-06-10
CH586306A5 (en) 1977-03-31
JPS5016009A (en) 1975-02-20
DE2421589A1 (en) 1974-12-05
CA1019423A (en) 1977-10-18
JPS5523637B2 (en) 1980-06-24
FR2229796A1 (en) 1974-12-13
DE2421589B2 (en) 1977-12-29
IT1013132B (en) 1977-03-30

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Legal Events

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