GB2176345A - Actuator with compensating flux path - Google Patents

Actuator with compensating flux path

Info

Publication number
GB2176345A
GB2176345A GB08606895A GB8606895A GB2176345A GB 2176345 A GB2176345 A GB 2176345A GB 08606895 A GB08606895 A GB 08606895A GB 8606895 A GB8606895 A GB 8606895A GB 2176345 A GB2176345 A GB 2176345A
Authority
GB
United Kingdom
Prior art keywords
driving
gap
stator
assembly
permeable
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
GB08606895A
Other versions
GB8606895D0 (en
GB2176345B (en
Inventor
Jean I Montagu
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.)
GEN SCANNING Inc
General Scanning Inc
Original Assignee
GEN SCANNING Inc
General Scanning 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 GEN SCANNING Inc, General Scanning Inc filed Critical GEN SCANNING Inc
Publication of GB8606895D0 publication Critical patent/GB8606895D0/en
Publication of GB2176345A publication Critical patent/GB2176345A/en
Application granted granted Critical
Publication of GB2176345B publication Critical patent/GB2176345B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • H01F7/145—Rotary electromagnets with variable gap

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

In an actuator having a stator (411) assembly which defines a pair of stator pole faces (435) a permeable rotor (430) assembly which is positioned to rotate relative to the stator assembly, and which defines a driving pole face (438) separated from each of the stator pole faces by a flux permeable driving gap (g), the rotor assembly having an operational range of rotor angular position over which drive flux passing across the driving gap drives the rotor assembly, the extent of the driving gap (g) at one of the stator pole faces being reduced as the rotor assembly rotates toward the limit of the operational range, the improvement including a flux-permeable compensating gap (G) between the driving pole face (438) and each stator pole face (435) which provides a secondary path for drive flux as the rotor assembly rotates toward the limit of the operational range, the compensating gap (G) being less permeable than the driving gap (g).
GB08606895A 1984-07-24 1984-07-24 Actuator with compensating flux path Expired GB2176345B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1984/001189 WO1986001028A1 (en) 1984-07-24 1984-07-24 Actuator with compensating flux path

Publications (3)

Publication Number Publication Date
GB8606895D0 GB8606895D0 (en) 1986-04-23
GB2176345A true GB2176345A (en) 1986-12-17
GB2176345B GB2176345B (en) 1988-07-06

Family

ID=22182216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08606895A Expired GB2176345B (en) 1984-07-24 1984-07-24 Actuator with compensating flux path

Country Status (5)

Country Link
EP (1) EP0187748A1 (en)
JP (1) JPS61502992A (en)
DE (1) DE3490738T1 (en)
GB (1) GB2176345B (en)
WO (1) WO1986001028A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2746456B2 (en) * 1989-09-14 1998-05-06 シャープ株式会社 Liquid crystal display
FR2688105B1 (en) * 1992-02-28 1994-05-06 Moving Magnet Technologies Sa ELECTROMAGNETIC ROTARY ACTUATOR SINGLE-PHASE RACE BETWEEN 60 AND 120 DEGREES.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2364656A (en) * 1941-10-23 1944-12-12 Magnetic Device Inc Magnetic actuator
US3624574A (en) * 1969-11-24 1971-11-30 Gen Scannings Inc Actuator
US3753180A (en) * 1972-05-23 1973-08-14 Ledex Inc Rotary solenoid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE26749E (en) * 1967-02-27 1970-01-06 Llectric motor for limited rotation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2364656A (en) * 1941-10-23 1944-12-12 Magnetic Device Inc Magnetic actuator
US3624574A (en) * 1969-11-24 1971-11-30 Gen Scannings Inc Actuator
US3753180A (en) * 1972-05-23 1973-08-14 Ledex Inc Rotary solenoid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
US E RE 26749 *

Also Published As

Publication number Publication date
JPS61502992A (en) 1986-12-18
JPH0530288B2 (en) 1993-05-07
GB8606895D0 (en) 1986-04-23
GB2176345B (en) 1988-07-06
WO1986001028A1 (en) 1986-02-13
DE3490738T1 (en) 1986-11-20
EP0187748A1 (en) 1986-07-23

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Legal Events

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

Effective date: 19920724