CN202616965U - Permanent magnet linear motor and compressor with same - Google Patents
Permanent magnet linear motor and compressor with same Download PDFInfo
- Publication number
- CN202616965U CN202616965U CN 201220297661 CN201220297661U CN202616965U CN 202616965 U CN202616965 U CN 202616965U CN 201220297661 CN201220297661 CN 201220297661 CN 201220297661 U CN201220297661 U CN 201220297661U CN 202616965 U CN202616965 U CN 202616965U
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- permanent magnet
- linear motor
- permanent
- halbach
- magnetism linear
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Abstract
The utility model provides a permanent magnet linear motor and a compressor with the same. The permanent magnet linear motor comprises an outer stator and a rotor, wherein the outer stator comprises an outer stator bracket and an outer stator core which is arranged on the outer stator bracket; the rotor comprises a rotor bracket and N Halbach permanent magnets which are arranged on the rotor bracket along the circumferential direction of the rotor bracket; the magnetizing directions of the adjacent Halbach permanent magnets are sequentially changed at an angle delta; and the Halbach permanent magnets are provided with smooth arc magnetic circuits. The compressor comprises the permanent magnet linear motor. The magnetizing directions of the permanent magnets are optimized by employing a Halbach array, and the brow leakage is reduced, so that a single-sided magnetic field is strengthened; and in addition, an inner stator of the motor can be saved so that the cost of the permanent magnet linear motor is saved, and the weight of the permanent magnet linear motor is lightened; and moreover, the iron loss of the motor is reduced, and the efficiency of the motor is improved.
Description
Technical field
The utility model relates to electric motors, more specifically, relates to a kind of permanent-magnetism linear motor and has its compressor.
Background technology
Linear compressor mainly is to be accompanied by the development of linear motor driving technology and progressively to grow up; Linear electric motors are a kind of power set that can electric energy be directly changed into straight-line mechanical energy, and being a kind ofly can provide main driving element high-power, high thrust.Linear electric motors generally are made up of stator and mover, and mover is done rectilinear motion under the driving of stator.
Because linear electric motors can directly produce continuously the straight line mechanical movement of unidirectional or reciprocal short stroke; Changed in the past with traditional intermediate mechanical transmission transform parts such as chain, steel wire rope, conveyer belt, tooth bar leading screw, turbine and worm and toggles; Defective such as transmission chain length, the volume that has overcome traditional mechanical switching mechanism is big, efficient is low, low-response, precision are low; Thereby, the innovation and the development of its new principle and new construction have also directly been promoted for the reciprocating piston refrigerant compressor provides a kind of new type of drive.
Existing linear compressor motor adopts moving-magnetic type linear motor mostly.As depicted in figs. 1 and 2, existing moving-magnetic type linear motor magnet steel comprises external stator 10, mover 20 and internal stator 30, and wherein external stator 10 comprises external stator support 11 and external stator core 12, and mover comprises mover support 21 and magnet steel 22.Shown in the C among Fig. 2 is the magnetic circuit that forms between magnet steel 22 and external stator 10 and the internal stator 30.Existing moving-magnetic type linear motor adopts the mode of parallel magnetization, needs internal stator to cooperate, just can with external stator stroke closed magnetic path, and brow leakage is more serious.
The utility model content
The utility model purpose be to provide a kind of simple in structure, can reduce the permanent-magnetism linear motor of leakage field and have its compressor.
An aspect according to the utility model provides a kind of permanent-magnetism linear motor, comprises external stator, and it comprises the external stator support and is arranged on the external stator core on the external stator support; Mover, it comprise the mover support and along the mover support circumferentially be arranged on N Halbach permanent magnet on the mover support, wherein, the magnetizing direction of adjacent Halbach permanent magnet changes and forms the permanent magnet of smooth arc magnetic circuit with the δ angle.
Further, the magnetizing direction of adjacent Halbach permanent magnet increases progressively with the δ angle successively.
Further, the magnetizing direction of adjacent Halbach permanent magnet successively decreases with the δ angle successively.
Further, 0 °＜δ≤45 °.
Further, the Halbach permanent magnet is a piece magnet.
Further, the Halbach permanent magnet comprises a plurality of permanent magnet units that magnetic direction changes with the δ angle successively.
Further, the cross section of Halbach permanent magnet is square.
Further, the cross section of Halbach permanent magnet is a rhombus.
Further, the cross section of Halbach permanent magnet is a polygon.
An aspect according to the utility model also provides a kind of compressor, comprises aforesaid permanent-magnetism linear motor.
Adopt the permanent-magnetism linear motor of the utility model and have its compressor; Adopt the Halbach array that the magnetizing direction of permanent magnet is optimized; The stator shaft orientation direction of motion reduces successively and forms level and smooth arc magnetic circuit outside, has reduced brow leakage, thereby has strengthened monolateral magnetic field.In addition, the utility model can save electric motor internal stator, has practiced thrift the cost of permanent-magnetism linear motor, has alleviated the weight of permanent-magnetism linear motor, and has reduced the motor iron loss, improves electric efficiency.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the perspective view of existing linear electric motors;
Fig. 2 is the sectional structure sketch map of existing linear electric motors;
Fig. 3 is the perspective view according to the permanent-magnetism linear motor of the utility model;
Fig. 4 is the first sectional structure sketch map according to the permanent-magnetism linear motor of the utility model;
Fig. 5 is the second sectional structure sketch map according to the permanent-magnetism linear motor of the utility model;
Fig. 6 is the magnetic circuit sketch map according to the permanent magnet of the permanent-magnetism linear motor of the utility model;
Fig. 7 is first structural representation according to the permanent magnet of the permanent-magnetism linear motor of the utility model;
Fig. 8 is second structural representation according to the permanent magnet of the permanent-magnetism linear motor of the utility model;
Fig. 9 is the 3rd structural representation according to the permanent magnet of the permanent-magnetism linear motor of the utility model; And
Figure 10 is the 4th structural representation according to the permanent magnet of the permanent-magnetism linear motor of the utility model.
Embodiment
Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Like the permanent-magnetism linear motor of Fig. 3 according to the utility model, comprise external stator 10, it comprises external stator support 11 and is arranged on the external stator core 12 on the external stator support 11; Mover 20, it comprise mover support 21 and along mover support 21 circumferentially be arranged on N Halbach permanent magnet 22 on the mover support 21, wherein, the magnetizing direction of adjacent Halbach permanent magnet 22 increases progressively the δ angle successively and forms smooth arc magnetic circuit.
As shown in Figure 4; The permanent-magnetism linear motor that the employing Halbach array arc of the utility model magnetizes; Be moving-magnetic type linear motor, the Halbach permanent magnet mode of magnetizing of placing on the electric mover is: reduce forming level and smooth arc magnetic circuit successively in external stator 10 axial motion directions.
The magnetic field of permanent magnet that adopts above-mentioned magnetization method to form can form the magnetic circuit C of sealing with motor external stator 10, has reduced brow leakage, thereby has strengthened monolateral magnetic field.(forming the closed magnetic path reason can resolve according to the minimum reluctance principle---and magnetic flux is always closed along the minimum path of magnetic resistance.) since monolateral this kind of employing structure decrease brow leakage, magnetic field strengthens naturally.
Because Halbach permanent magnet 22 constitutes closed magnetic path voluntarily with external stator 10, does not need internal stator to form closed magnetic circuit, so can save electric motor internal stator, has practiced thrift the cost of permanent-magnetism linear motor, has alleviated the weight of permanent-magnetism linear motor.In addition,, can reduce iron loss, improve electric efficiency so save electric motor internal stator because internal stator is the part in the source of iron loss.
In the previous embodiment, use magnetizing equipment that the Halbach permanent magnet is carried out arc and magnetize, thereby form level and smooth arc magnetic circuit as shown in Figure 5.The magnetizing direction of Halbach permanent magnet 22 is along the direction of motion of mover 20 from left to right, and perhaps the magnetizing direction of Halbach permanent magnet 22 is along the direction of motion of mover 20 from right to left.
Preferably, the magnetizing direction of adjacent Halbach permanent magnet 22 increases progressively with the δ angle successively or successively decreases with the δ angle.Wherein, 0 °＜δ≤45 °
As shown in Figure 5, according to another embodiment of the utility model, Halbach permanent magnet 22 comprises a plurality of permanent magnet units 221 that magnetic direction changes with the δ angle successively.The a plurality of permanent magnet units 221 that constitute Halbach permanent magnet 22 splice each other, can simplify and magnetize.
In other embodiments, Halbach permanent magnet 22 is a piece magnet, to simplify processing and assembling process.
To shown in Figure 9, the Halbach permanent magnet 22 in the utility model can be designed to multiple shape like Fig. 6, and on mover support 21, designs multiple corresponding magnet steel groove accordingly.Wherein, Halbach permanent magnet 22 is fixed on through gluing or plastic packaging mode in the magnet steel groove on the mover support 21 that matches.
For example Halbach permanent magnet 22 is an arc-shaped permanent magnet as shown in Figure 6.Perhaps Halbach permanent magnet 22 is square permanent magnet for cross section as shown in Figure 7.Perhaps as shown in Figure 8, Halbach permanent magnet 22 is the permanent magnet of rhombus for the cross section.Perhaps as shown in Figure 9, Halbach permanent magnet 22 is polygonal permanent magnet for the cross section.
The utility model also provides a kind of compressor, comprises aforesaid permanent-magnetism linear motor.
From above description, can find out that the utility model the above embodiments have realized following technique effect:
The permanent-magnetism linear motor of the utility model and have its compressor; Adopt the Halbach array that the magnetizing direction of permanent magnet is optimized; The stator shaft orientation direction of motion reduces successively and forms level and smooth arc magnetic circuit outside, has reduced brow leakage, thereby has strengthened monolateral magnetic field.In addition, the utility model can save electric motor internal stator, has practiced thrift the cost of permanent-magnetism linear motor, has alleviated the weight of permanent-magnetism linear motor, and has reduced the motor iron loss, improves electric efficiency.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (10)
1. a permanent-magnetism linear motor is characterized in that, comprising:
External stator (10), it comprises external stator support (11) and is arranged on the external stator core (12) on the said external stator support (11);
Mover (20), it comprise mover support (21) and along said mover support (21) circumferentially be arranged on N the Halbach permanent magnet (22) on the said mover support (21),
Wherein, the magnetizing direction of adjacent said Halbach permanent magnet (22) changes and forms the said Halbach permanent magnet (22) with smooth arc magnetic circuit successively with the δ angle.
2. permanent-magnetism linear motor according to claim 1 is characterized in that, the magnetizing direction of adjacent said Halbach permanent magnet (22) increases progressively with the δ angle successively.
3. permanent-magnetism linear motor according to claim 1 is characterized in that, the magnetizing direction of adjacent said Halbach permanent magnet (22) successively decreases with the δ angle successively.
4. according to each described permanent-magnetism linear motor in the claim 1 to 3, it is characterized in that 0 °＜δ≤45 °.
5. permanent-magnetism linear motor according to claim 4 is characterized in that, said Halbach permanent magnet (22) is a piece magnet.
6. permanent-magnetism linear motor according to claim 4 is characterized in that, said Halbach permanent magnet (22) comprises a plurality of permanent magnet units (221) that magnetic direction changes with the δ angle successively.
7. permanent-magnetism linear motor according to claim 1 is characterized in that, the cross section of said Halbach permanent magnet (22) is square.
8. permanent-magnetism linear motor according to claim 1 is characterized in that, the cross section of said Halbach permanent magnet (22) is a rhombus.
9. permanent-magnetism linear motor according to claim 1 is characterized in that, the cross section of said Halbach permanent magnet (22) is a polygon.
10. a compressor is characterized in that, comprises each described permanent-magnetism linear motor in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297661 CN202616965U (en) | 2012-06-21 | 2012-06-21 | Permanent magnet linear motor and compressor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297661 CN202616965U (en) | 2012-06-21 | 2012-06-21 | Permanent magnet linear motor and compressor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202616965U true CN202616965U (en) | 2012-12-19 |
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ID=47350634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220297661 Expired - Lifetime CN202616965U (en) | 2012-06-21 | 2012-06-21 | Permanent magnet linear motor and compressor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202616965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516172A (en) * | 2012-06-21 | 2014-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet linear motor and compressor having permanent magnet linear motor |
-
2012
- 2012-06-21 CN CN 201220297661 patent/CN202616965U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516172A (en) * | 2012-06-21 | 2014-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet linear motor and compressor having permanent magnet linear motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |