CN2182997Y - Braking magnet steel combination body made of Nd-Fe-B and rare-earth permanent magnet for electric meter - Google Patents
Braking magnet steel combination body made of Nd-Fe-B and rare-earth permanent magnet for electric meter Download PDFInfo
- Publication number
- CN2182997Y CN2182997Y CN 94202704 CN94202704U CN2182997Y CN 2182997 Y CN2182997 Y CN 2182997Y CN 94202704 CN94202704 CN 94202704 CN 94202704 U CN94202704 U CN 94202704U CN 2182997 Y CN2182997 Y CN 2182997Y
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- magnetic
- permanent magnet
- earth permanent
- rare
- utility
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- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The utility model discloses a braking magnet steel combination body made of Nd-Fe-B and rare earth permanent magnet for an electric meter, which belongs to the technical field of braking magnet in the constructional detail of the electromechanical device of the voltaic time integral. The utility model is mainly suitable for an electric meter. The structure of the composite unit of the brake magnetic steel of the utility model is composed of a magnetic conductivity plate, a general Nd-Fe-B and rare earth permanent magnet, a magnetic yoke iron, magnetic temperature compensating alloy and a magnetic insulation metal plate. The structural style of the utility model is characterized in that a permanent magnet is inlaid between the two magnetic yoke irons, the permanent magnet and two magnetic yoke irons are all fixed on the magnetic insulation metal plate, and the outside of two magnetic yoke irons are appressed with two blocks of magnetic temperature compensating alloy. The magnetic conductivity plate and the magnetic yoke iron are assembled in parallel, and an air space is arranged between the magnetic conductivity plate and the magnetic yoke iron.
Description
The utility model belongs to the machine of the time integral of electric current---the braking field of magnets in the electric installation structure parts.Mainly be applicable to watt-hour meter.
Brake magnetic steel in the watt-hour meter (being magnet) acts on the operating disk, makes it to produce braking moment, because the magnetic line of force of operating disk cutting brake magnetic steel causes in disk rotation direction opposite effect moment disk at the uniform velocity being turned round.
In order to make watt-hour meter that good temperature characterisitic be arranged, on brake magnetic steel, dispose magnetic temperature compensating alloy, when temperature raises, the corresponding reduction of the magnetic permeability of magnetic temperature compensating alloy, magnetic flux by it reduces, thereby causes the magnetic flux of brake magnetic steel to increase, and the error of temperature value is compensated.
For precision and the serviceable life that guarantees watt-hour meter, require brake magnetic steel to have high magnetic flux density and bigger coercive force.
Based on above-mentioned requirements, existing brake magnetic steel structurally adopts two " recessed " type one-piece constructions, adopts Al-Ni-Co series permanent-magnet alloy or low-temperature coefficient Nd-Fe-B permanent magnet on material.But the magnetic Circuit Design of this two " recessed " type structures is also unreasonable.The Al-Ni-Co series permanent-magnet alloy that is adopted, its coercive force is very low, for satisfying the requirement of watt-hour meter, must strengthen magnet volume, causes cost to rise.
The purpose of this utility model is to provide the big watt-hour meter of a kind of magnetic flux density height, coercive force with common Nd-Fe-B rare-earth permanent magnet brake magnetic steel assembly.
According to above-mentioned purpose, the utility model structurally adopts fabricated structure, and promptly brake magnetic steel is an assembly.It is made up of magnetic conductance plate, common Fe-B rare-earth permanent magnet, magnetic vibrating feeder yoke, magnetic temperature compensating alloy and non-magnetic conductive metal sheet.
The utility model adopts abovementioned technology, the air-gap flux that makes brake magnetic steel is greater than 2700 oersteds, temperature coefficient is less than 0.015%, satisfied the requirement of the every performance index of watt-hour meter fully, cost reduces greatly, than alnico alloy is the low more than 1/3rd of permanent magnet, and production efficiency improves greatly.
Compared with prior art, the utlity model has following advantage:
(1) the magnetic flux density height of brake magnetic steel, coercive force is big, and braking ability is stable.
(2) the brake magnetic steel volume is little, and is in light weight.
(3) low cost of manufacture is convenient to promote.
Now the utility model is described in further detail in conjunction with the accompanying drawings.
Accompanying drawing is the structural representation of the utility model watt-hour meter with common Nd-Fe-B rare-earth permanent magnet brake magnetic steel assembly.
In the accompanying drawing, 1 is the magnetic conductance plate, and 2 is common Fe-B rare-earth permanent magnet, and 3 is magnetic vibrating feeder yoke, and 4 is magnetic temperature compensating alloy, and 5 is non-magnetic conductive metal sheet.
Find out that from accompanying drawing brake magnetic steel assembly described in the utility model is made up of magnetic conductance plate 1, common Fe-B rare-earth permanent magnet 2, magnetic vibrating feeder yoke 3, magnetic temperature compensating alloy 4 and non-magnetic conductive metal sheet 5.Wherein, a common Fe-B rare-earth permanent magnet 2 is set in the centre of two magnetic vibrating feeder yokes 3, is fixed in the lump on the non-magnetic conductive metal sheet 5, and the outside symmetry of two magnetic vibrating feeder yokes is close to two blocks of magnetic temperature compensating alloies 4, magnetic conductance plate 1 and magnetic vibrating feeder yoke 3 parallel assemblings have an air gap between the two.Magnetic conductance plate 1 can make the magnetic line of force that is sent by magnetic vibrating feeder yoke 3 the two poles of the earth play poly-magnetic and guarantee that magnetic field acts on uniformly.
Magnetic vibrating feeder yoke is made by permeability magnetic material.
Claims (1)
- A kind of watt-hour meter comprises permanent magnet and magnetic vibrating feeder yoke with common Nd-Fe-B rare-earth permanent magnet brake magnetic steel assembly, it is characterized in that:This brake magnetic steel assembly is made up of magnetic conductance plate (1), common Fe-B rare-earth permanent magnet (2), magnetic vibrating feeder yoke (3), magnetic temperature compensating alloy (4) and non-magnetic conductive metal sheet (5);Common Fe-B rare-earth permanent magnet (2) is set in the centre of two magnetic vibrating feeder yokes (3), be fixed in the lump on the non-magnetic conductive metal sheet (5), the outside symmetry of two magnetic vibrating feeder yokes (3) is close to two blocks of magnetic temperature compensating alloies (4), magnetic conductance plate (1) and the parallel assembling of magnetic vibrating feeder yoke (3), and an air gap is arranged between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202704 CN2182997Y (en) | 1994-02-03 | 1994-02-03 | Braking magnet steel combination body made of Nd-Fe-B and rare-earth permanent magnet for electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202704 CN2182997Y (en) | 1994-02-03 | 1994-02-03 | Braking magnet steel combination body made of Nd-Fe-B and rare-earth permanent magnet for electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2182997Y true CN2182997Y (en) | 1994-11-16 |
Family
ID=33822401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94202704 Expired - Fee Related CN2182997Y (en) | 1994-02-03 | 1994-02-03 | Braking magnet steel combination body made of Nd-Fe-B and rare-earth permanent magnet for electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2182997Y (en) |
-
1994
- 1994-02-03 CN CN 94202704 patent/CN2182997Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |