CN106655568A - High-performance interior-ferrite permanent magnet (IPM) motor - Google Patents
High-performance interior-ferrite permanent magnet (IPM) motor Download PDFInfo
- Publication number
- CN106655568A CN106655568A CN201510736279.4A CN201510736279A CN106655568A CN 106655568 A CN106655568 A CN 106655568A CN 201510736279 A CN201510736279 A CN 201510736279A CN 106655568 A CN106655568 A CN 106655568A
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- China
- Prior art keywords
- ferrite
- steel
- magnet
- magnetic steel
- motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a high-performance interior-ferrite permanent magnet (IPM) motor. A rotor magnetic pole structure (1/6) shown as an abstract drawing consists of ferrite magnetic steels A (1), a ferrite magnetic steel B (2), and a ferrite magnetic steel C (3). The four ferrite magnetic steels have the same shapes and dimensions, so that convenient installation and batch type production can be realized. The motor has the good cost performance; the ferrite magnetic steel price is one third to a quarter of the price of the rare-earth permanent magnet neodymium-iron-boron magnetic steel; however, on the basis of the optimized design of the magnetic steel dimensions and configuration structure, the performance of the ferrite magnetic steel and the performance of the rare-earth permanent magnet neodymium-iron-boron magnetic steel are close to each other basically.
Description
Technical field：
The invention belongs to magneto technical field, and in particular to a kind of high performance built-in ferrite permanent-magnet (Interior-ferrite Permanent Magnet) motor.
Background technology：
In recent years, with the increasingly in-depth required environmental protection and energy-saving, every field is all in the permanent magnet motor for promoting the use of achievable small-sized efficient.Rare-earth permanent magnetic material is the requisite material of motor small-sized efficient rateization.Rare Earth Alloy Permanent Magnet Materials mainly have three kinds of 5 types SmCo rare earth alloy (SmCo5), 17 types SmCo rare earth alloy (SmCo17) and NdFeB rear-earth alloy (Nd2Fe14B), because samarium, cobalt are the rare metal of costliness, belong to strategic goods and materials, price, therefore relatively broad use NdFeB rear-earth alloy (magnet steel).
Nd-Fe-B magnet steel presses different model and classification, general price about in 200～250 yuan/kg or so, relative to the ferrite magnetic steel of tens of unit/kg, its price still very high (about 3～4) times, and the fluctuation of price is big, is difficult to guarantee the stable supply of material.Therefore, while active development permanent magnet motor, the present invention is improved by optimization design, magnetic field analysis and structure, it is proposed that a kind of high performance built-in ferrite permanent-magnet motor.
Ferrite is that permanent-magnet ferrite is called ferrite magnetic steel, is that one kind has single shaft, anisotropic hexagonal structure compound, mainly barium, strontium, three kinds of ferrites of lead and its compound solid solution by the oxide and other dispensing sintering of iron.Therefore after class material magnetizes, the magnetic field intensity of residual is very high, remains to maintain constant residual magnetization for a long time after external magnetic field disappears, therefore can be used for the high-intensity magnetic field that space outerpace produces permanent magnetic.
All kinds of motor of widespread demand, enormous amount are made using the ferrite magnetic steel of this cheap (about the 1/3～1/4 of Nd-Fe-B magnet steel price), not only decline to a great extent on cost, and the enforcement and checking for passing through the present invention, also can match in excellence or beauty with the performance of Nd-Fe-B rare-earth permanent magnet motor in performance.
Product made by the present invention, with its superior cost performance, practical application area is expected increasingly extensive.
The content of the invention：
The basic structure of built-in ferrite permanent-magnet (1PM) motor rotor is as shown in Figure 1.
To reduce leakage magnetic flux, the outer circumferential side iron core of ferrite magnetic steel A is detached；It is to be connect by a narrow bridging bridging between magnet steel A, magnet steel B.
To expand the surface area of ferrite magnetic steel, the ferrite magnetic steel A of wheel web configuration is employed；To reduce leakage field, ferrite magnetic steel B is configured with；Ferrite magnetic steel C is configured with to reduce d axle inductances and increase salient pole ratio.
The field structure of 1PM motor rotors of the present invention is made up of this few part magnet steel.In this structure, because being fully effectively utilized magnetic resistance moment, even if ferritic remanence strength (Br=0.45T, T- teslas, magnetic induction intensity unit) it is only the 1/3 of rare earth permanent magnet neodymium iron boron, under the conditions of same electric current, specification, the 90% of rare-earth permanent magnet motor nominal torque can be also reached.
Torque and efficiency are two big performance indications of motor.In terms of efficiency, contrasted by the efficiency curve figure of rare-earth permanent magnet motor and ferrite permanent-magnet motor of the present invention, reached the almost identical result of both peak efficiencies.Under same current condition, due to the torque of ferrite permanent-magnet motor it is little, in the range of low speed high torque, increase the electric current of ferrite permanent-magnet motor, though because of the increasing of copper loss, efficiency has the trend of some reductions, but in high speed Rotary District because the electric current of low-intensity magnetic field is little, efficiency can be lifted.
Basic structure (Fig. 1) of the present invention for built-in ferrite permanent-magnet (1PM) motor rotor, analytical calculation and the optimization design of rotor structure by magnetic field, to reach optimal electromagnetic performance, shape, the size of structure and magnet steel to rotor are further improved.Fig. 2 is the magnetization analysis model of rotor magnetic pole (1/6)；Fig. 3 is the configuration structure and shape of the rotor magnetic pole (1/6) after improving.
Description of the drawings：
Fig. 1 is the basic structure of built-in ferrite permanent-magnet (1PM) motor rotor, wherein, 1- ferrite magnetic steel A；2- ferrite magnetic steel B；3- ferrite magnetic steel C.
Fig. 2 is the magnetization analysis model of built-in ferrite permanent-magnet (1PM) motor rotor magnetic pole (1/6), wherein, 1- ferrite magnetic steel A；2- ferrite magnetic steel B；3- ferrite magnetic steel C.
Fig. 3 is the configuration structure and shape of (1PM) the motor rotor magnetic pole (1/6) after improving, wherein, 1- ferrite magnetic steel A；2- ferrite magnetic steel B；3- ferrite magnetic steel C.
Specific embodiment：
The present invention is practical to reach batch production, We conducted the trial-production of model machine.The stator of motor still adopts conventional art, and the structure and winding mode of winding do not change.Key is the rotor for being built-in with magnet steel, and by designed rotor structure (Fig. 3), the punching first on punch press goes out the silicon steel sheet of required form, then according to iron core thickness, by silicon steel sheet layering overlapping, compressing composition rotor core.The single ferrite magnetic steel for magnetizing is embedded into one by one in the magnet steel mould of iron core again.Additionally, also to be magnetized i.e. so-called " back magnetization " process again to the magnet steel in insertion groove, to reach the purpose for fully magnetising.The necessary condition of back magnetization is：It is required that the magnetic field for applying should be such that magnet steel has than original high 3 times coercivity.
After the completion of back magnetization technique, magnetization analysis model (Fig. 2) is drawn out.Analysis result finds：The magnet steel A of spoke-like configuration is difficult to pass through because of magnetic flux in the internal side diameter of rotor, must shorten magnet steel A, and magnet steel A is inner to one angle of magnet steel B directions deflection；And between the inner of the two ends of magnet steel B and magnet steel A, be provided with magnetic flux easily by air layer.Thus, in rotor magnetic pole structure (Fig. 3) after improvement, 4 blocks of magnet steel of each pole configuration, its configuration improves to some extent, but its shape, size all same.Both the improvement of performance had been ensure that, the unification of specification had been realized again, and be easy to manufacture and install.
Claims (3)
1. a kind of high performance built-in ferrite permanent-magnet (1PM) motor, its rotor magnetic pole structure includes
2 pieces of ferrite magnetic steel A (1), 1 piece of ferrite magnetic steel B (2), 1 piece of ferrite magnetic steel C (3), each
Magnetic pole is constituted by 4 block sizes, shape identical ferrite magnetic steel.
2. the rotor magnetic pole structure of built-in ferrite permanent-magnet motor according to claim 1, its feature
It is to be inserted in the magnet steel groove of rotor core after every piece of magnet steel magnetization, in addition it is also necessary to in insertion groove
Magnet steel carry out it is magnetized so-called again《Back magnetization》Process, to reach the purpose for fully magnetising.
3. the rotor magnetic pole structure of built-in ferrite permanent-magnet motor according to claim 1, its feature
The necessary condition for being " back magnetization " is：Require the magnetic field for applying, it is ensured that magnet steel has than originally high 3 times
Coercivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736279.4A CN106655568A (en) | 2015-11-04 | 2015-11-04 | High-performance interior-ferrite permanent magnet (IPM) motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736279.4A CN106655568A (en) | 2015-11-04 | 2015-11-04 | High-performance interior-ferrite permanent magnet (IPM) motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106655568A true CN106655568A (en) | 2017-05-10 |
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ID=58810555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510736279.4A Pending CN106655568A (en) | 2015-11-04 | 2015-11-04 | High-performance interior-ferrite permanent magnet (IPM) motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655568A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831083A (en) * | 2019-04-08 | 2019-05-31 | 哈尔滨工业大学 | The built-in U-shaped series-parallel adjustable flux permanent magnet synchronous motor of mixed magnetic circuit of "-" type- |
| CN110011509A (en) * | 2019-05-09 | 2019-07-12 | 浙江万冠电机有限公司 | A kind of DC brushless motor |
| CN113824226A (en) * | 2021-08-24 | 2021-12-21 | 扬州大学 | Alternating pole local HALBACH structure less rare earth mixed permanent magnet motor |
-
2015
- 2015-11-04 CN CN201510736279.4A patent/CN106655568A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831083A (en) * | 2019-04-08 | 2019-05-31 | 哈尔滨工业大学 | The built-in U-shaped series-parallel adjustable flux permanent magnet synchronous motor of mixed magnetic circuit of "-" type- |
| CN110011509A (en) * | 2019-05-09 | 2019-07-12 | 浙江万冠电机有限公司 | A kind of DC brushless motor |
| CN113824226A (en) * | 2021-08-24 | 2021-12-21 | 扬州大学 | Alternating pole local HALBACH structure less rare earth mixed permanent magnet motor |
| CN113824226B (en) * | 2021-08-24 | 2022-07-15 | 扬州大学 | Alternating pole local HALBACH structure less rare earth mixed permanent magnet motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |
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| WD01 | Invention patent application deemed withdrawn after publication |