CN202817935U - Magnetic steel structure of motor rotor - Google Patents
Magnetic steel structure of motor rotor Download PDFInfo
- Publication number
- CN202817935U CN202817935U CN 201220533836 CN201220533836U CN202817935U CN 202817935 U CN202817935 U CN 202817935U CN 201220533836 CN201220533836 CN 201220533836 CN 201220533836 U CN201220533836 U CN 201220533836U CN 202817935 U CN202817935 U CN 202817935U
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- Prior art keywords
- magnetic steel
- torque
- steel body
- motor rotor
- groove
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- Expired - Fee Related
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to a magnetic steel structure of a motor rotor. The magnetic steel structure comprises a magnetic steel body, wherein continuous bending grooves are arranged at a side edge of the magnetic steel body, corners of the bending grooves have arc chamfered structures, and bending groove tongues which can be matched with the bending grooves are symmetrically arranged at the other side of the magnetic steel body. According to the magnetic steel structure, the positioning torque of the structure is greatly reduced, so that the permanent magnet motor has low torque ripple, the structure can ensure the accurate positioning operation and good slow running performance of the permanent magnet motor, and the structure is easy to implement in the production process.
Description
Technical field
The utility model relates to the magneto technical field, specifically relates to a kind of motor rotor magnetic steel structure.
Background technology
Along with the increase that permanent-magnet brushless DC electric machine is used in the high-performance occasion, the cogging torque minimization technique seems and becomes more and more important.No matter be the optimal design of brshless DC motor, or it is carried out the Pulsation analysis of torque, all must consider the impact of cogging torque.
Gullet positioning torque is the intrinsic phenomenon of permanent-magnetic electric machine, in the situation of permanent magnet synchronous motor three phase winding no powers and winding open circuit, during with the light rotary rotor of have gentle hands, can feel the torque that has certain effect on the rotor, this torque size in a circle scope is inhomogeneous, and can find some anchor points, namely be positioned at these points at the nature lower rotor part, only under certain extraneous torque, could change the position of rotor location, Just because of this, usually the torque of rotary rotor under permanent magnet motor no power and the winding open circuit situation is called location torque, the rotor that is magneto has a kind of trend of aliging with stator along a certain specific direction, and trend can produce a kind of vibration torque thus, is also referred to as cogging torque.
The generation of gullet positioning torque comes from the tangential force between rotor permanent magnet and the stator tooth, is rotor permanent magnet and the interactional result of stator teeth groove.It produces the existence that mainly comes from the stator teeth groove, the relative position of the magnetic pole of p-m rotor and stator teeth groove is not simultaneously, the magnetic conductance of main magnetic circuit is different, the position of p-m rotor trend location magnetic conductance maximum, i.e. stable equilibrium point, electromagnetic torque is zero, depart from the effect torque that Shi Douyou is returned to this position, or be tending towards another adjacent stable equilibrium point, and the action direction of visible torque is alternation, usually said location torque refers to the alternation amplitude.Motor revolves and turns around, the periodicity of torque alternation, i.e. and stable equilibrium position number, more situation equals stator tooth (groove) number.Location torque mainly comes from the stator teeth groove, so also be called cogging torque, perhaps extensively some are called gullet positioning torque to implication.
The way that reduces at present location torque is that the lateral edges at magnet steel is provided with zigzag slot or wave-shaped groove, but still can't produce a desired effect.
The utility model content
The purpose of this utility model provides a kind of motor rotor magnetic steel structure in order to reduce the gullet positioning torque of magneto.
For achieving the above object, the technical scheme that the utility model adopts is: a kind of motor rotor magnetic steel structure, comprise the magnet steel body, lateral edges at the magnet steel body is provided with the continuous bending groove, the turning of described bending groove is the circular arc chamfering structure, is provided with symmetrically the bending shape groove and tongue that can cooperate with the bending groove at the opposite side of magnet steel body.
Be provided with the recess that coincide with the turning chamfering at described groove and tongue.
The curved structure of described magnet steel body.
Because the employing of technique scheme, the utility model compared with prior art has the following advantages: the location torque of this structure significantly reduces, and makes magneto have the low torque fluctuation, guarantee its accurate positioning trip and low cruise characteristic preferably, and on production technology, also be easy to realize.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
The permanent magnet machine rotor surface is provided with the magnet steel of a plurality of Surface Mounts, the curved structure of described magnet steel, consistent with the rotor surface radian, the adjacent magnet steel Cheng Yiquan that is fitted to each other, the structure of every magnet steel as shown in Figure 1, it comprises magnet steel body 1, lateral edges at magnet steel body 1 is provided with continuous bending groove 3, this bending groove 3 is upper perpendicular to body 1, go to the bottom, the turning 2 of described bending groove 3 is the circular arc chamfering structure, opposite side at magnet steel body 1 is provided with the bending shape groove and tongue 5 that can cooperate with bending groove 3 symmetrically, is provided with the recess 4 that coincide with turning 2 chamferings at described groove and tongue 5.During assembling, the bending-type groove and tongue 5 of each magnet steel all inserts in the adjacent bending groove 3 to finish assembling.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement; can not limit protection range of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (3)
1. motor rotor magnetic steel structure, it is characterized in that: comprise magnet steel body (1), lateral edges at magnet steel body (1) is provided with continuous bending groove (3), the turning (2) of described bending groove (3) is the circular arc chamfering structure, is provided with symmetrically the bending shape groove and tongue (5) that can cooperate with bending groove (3) at the opposite side of magnet steel body (1).
2. a kind of motor rotor magnetic steel structure according to claim 1 is characterized in that: be provided with the recess (4) that coincide with turning (2) chamfering at described groove and tongue (5).
3. a kind of motor rotor magnetic steel structure according to claim 1 is characterized in that: the curved structure of described magnet steel body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220533836 CN202817935U (en) | 2012-10-18 | 2012-10-18 | Magnetic steel structure of motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220533836 CN202817935U (en) | 2012-10-18 | 2012-10-18 | Magnetic steel structure of motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202817935U true CN202817935U (en) | 2013-03-20 |
Family
ID=47876745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220533836 Expired - Fee Related CN202817935U (en) | 2012-10-18 | 2012-10-18 | Magnetic steel structure of motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202817935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868242A (en) * | 2012-10-18 | 2013-01-09 | 太仓东元微电机有限公司 | Magnetic steel structure of motor rotor |
-
2012
- 2012-10-18 CN CN 201220533836 patent/CN202817935U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868242A (en) * | 2012-10-18 | 2013-01-09 | 太仓东元微电机有限公司 | Magnetic steel structure of motor rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20201018 |