GB1256133A - Improvements relating to eddy current damping devices - Google Patents
Improvements relating to eddy current damping devicesInfo
- Publication number
- GB1256133A GB1256133A GB3294269A GB3294269A GB1256133A GB 1256133 A GB1256133 A GB 1256133A GB 3294269 A GB3294269 A GB 3294269A GB 3294269 A GB3294269 A GB 3294269A GB 1256133 A GB1256133 A GB 1256133A
- Authority
- GB
- United Kingdom
- Prior art keywords
- teeth
- stator
- rotor
- eddy current
- permanent magnet
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/043—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with a radial airgap
Abstract
1,256,133. Eddy current brakes. BRITISH AIRCRAFT CORP. Ltd. 26 June, 1970 [30 June, 1969], No. 32942/69. Heading H2A. An eddy current damping device e.g. for a gyroscope, comprises a permanent magnet rotor 10 with toothed polepieces 11 surrounded by a cylindrical, non-magnetic, conductive stator 14 having teeth formed by soft-iron bars 13 embedded therein. Relative angular movement between the stator and rotor produces eddy currents in the stator which give rise to an opposing torque and to increase the eddy currents, half the teeth on each polepiece 11 are phase-shifted by half a tooth pitch as shown in Fig. 3a so that when the teeth in Band I of a pole-piece are in register with the stator teeth 13, those in Band II are out of register therewith. Consequently for a given rate of displacement of the rotor, the major phase axis oscillates about the polar axis of the magnet as the bands of rotor teeth come into register with the teeth 13 so that the rate at which the lines of flux cut the damping member is higher than said given rate. The stator teeth may be formed as the polepieces of the permanent magnet or, alternatively, the stator and permanent magnet in Fig. 1 may be stationary and only the rotor teeth movable in the air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3294269A GB1256133A (en) | 1969-06-30 | 1969-06-30 | Improvements relating to eddy current damping devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3294269A GB1256133A (en) | 1969-06-30 | 1969-06-30 | Improvements relating to eddy current damping devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1256133A true GB1256133A (en) | 1971-12-08 |
Family
ID=10346284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3294269A Expired GB1256133A (en) | 1969-06-30 | 1969-06-30 | Improvements relating to eddy current damping devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1256133A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1927733A1 (en) * | 2006-12-01 | 2008-06-04 | Delphi Technologies, Inc. | Torque Oscillation Controller |
| GB2511856A (en) * | 2013-03-15 | 2014-09-17 | Goodrich Actuation Systems Ltd | Damping arrangement for aircraft landing gear, for example a nosewheel |
-
1969
- 1969-06-30 GB GB3294269A patent/GB1256133A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1927733A1 (en) * | 2006-12-01 | 2008-06-04 | Delphi Technologies, Inc. | Torque Oscillation Controller |
| WO2008065086A1 (en) * | 2006-12-01 | 2008-06-05 | Delphi Technologies, Inc. | Torque oscillation controller |
| GB2511856A (en) * | 2013-03-15 | 2014-09-17 | Goodrich Actuation Systems Ltd | Damping arrangement for aircraft landing gear, for example a nosewheel |
| GB2511856B (en) * | 2013-03-15 | 2015-07-01 | Goodrich Actuation Systems Ltd | Damping arrangement for aircraft landing gear, for example a nosewheel |
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