CN206164227U - Stator of permanent magnetic force square motor and permanent magnetic force square motor that has high rotation torque density - Google Patents
Stator of permanent magnetic force square motor and permanent magnetic force square motor that has high rotation torque density Download PDFInfo
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- CN206164227U CN206164227U CN201621134045.9U CN201621134045U CN206164227U CN 206164227 U CN206164227 U CN 206164227U CN 201621134045 U CN201621134045 U CN 201621134045U CN 206164227 U CN206164227 U CN 206164227U
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Abstract
The utility model provides a stator of permanent magnetic force square motor, it is sealed with the notch between each stator tooth through sealing material, make stator tooth be annular overall structure, stator yoke portion is another overall structure, and the two is separable each other, consequently in stator assembly technology, inserts each armature winding assembly back accessible draw -in groove on corresponding stator tooth that close or the lock is direct links together the two, and simple process is with low costs, efficient, the module production of being convenient for. In addition, stator core is favorable to reducing the loss of electric machine when selecting nanocrystalline soft magnetic alloy material or high trade mark silicon steel material for use, be unshakable in one's determination when the rotor permanent magnet and support, the tangential magnetize permanent magnet and the permanent magnet that radially magnetizes in turn the setting be favorable to improving motor torque density when the work air gap side surface of iron core.
Description
Technical field
The utility model is related to machine field, more particularly to a kind of efficient high torque density permanent magnet torque motor.
Background technology
Permanent magnet torque motor includes stator and rotor, and stator includes stator core and armature winding, and stator core includes fixed
Sub- yoke portion and stator teeth, stator teeth is made up of several stator tooths, and armature winding detours on each stator tooth, each adjacent stators
It is groove between tooth.At present, stator yoke and stator teeth are structure as a whole, in the assembly technology of stator, usually by each electricity
Pivot winding is assemblied on corresponding stator tooth.In order to prevent winding from spilling outside groove, encapsulant is typically adopted at present by each notch
Sealing, so as to play the function of slot wedge.But, because general slot wedge is non-magnet_conductible material so that motor has cogging torque, will
Affect the performance of motor.In addition, the process costs height of sealing notch, efficiency are low, especially when slot number increases, technique is loaded down with trivial details,
The cost of manufacture of stator is increased, make efficiency is reduced, large-scale production is not suitable with.
In addition, the loss of permanent magnet torque motor is one of the problem for needing scientific worker to consider.Permanent magnet torque motor
Loss is mainly derived from the resistance loss of winding and the magnetic hysteresis and eddy-current loss of stator core material.At present, permanent magnet motor stator
Unshakable in one's determination main using traditional silicon steel sheet, the core loss of this material is larger, and especially in high-frequency electric machines, core loss is particularly tight
Weight, constrains application of the motor in high-frequency high-speed occasion.
The motor requirement torque density for being applied to the occasions such as robot, industrial drives, computer external, wheel hub driving is big,
Therefore multi-pole magnetic pole is generally taken in the design to reduce every pole magnetic flux, and then can reduce corresponding stator yoke size, so as to
The motor for alloing same power reduces volume, improves the torque density (number of poles is between 10-30) of motor.But meanwhile, phase
(such as 3000rpm) under with rotating speed, number of poles increases so that frequency increase, core loss (1.3 times with frequency of supply of unit volume
Side is directly proportional) increase therewith.If taking 10 pairs of poles, frequency of supply is up to 500Hz, if using identical material and magnetic flux density
Words, the loss of the electric machine stator iron unit volume by for 20 times of common power frequency motor, if not taking reduction core loss
Or cooling provision, motor will be unable to use.
Utility model content
In view of the state of the art of above-mentioned permanent magnet torque motor, the utility model is there is provided a kind of stator of permanent magnet torque motor
Structure, the structure is conducive to improving the assembly technology of stator, low cost, efficiency high.
The technical solution of the utility model is as follows：
A kind of stator of permanent magnet torque motor, including stator core and armature winding, stator core include stator yoke and
Stator teeth, stator teeth is made up of several stator tooths, and armature winding detours on each stator tooth, is between each adjacent stators tooth
Groove；It is characterized in that：
The stator yoke is separable with stator teeth；
Described each notch is sealed by encapsulant, makes each stator tooth form ring junction with the encapsulant of notch
Structure；
The stator yoke can be linked together with stator teeth by draw-in groove insert-type, i.e. in the end of each stator tooth
And the opposite position of stator yoke is formed with the convex card article and spill draw-in groove for matching in pairs, along the axle of the loop configuration
To together with each convex card article for matching in pairs can be plugged together with spill draw-in groove；
Or, the stator yoke can be linked together with stator teeth by buckle-type, i.e. each fixed described in spacer
The end of sub- tooth and the opposite position of stator yoke are formed with the projection and depression for matching in pairs, along the loop configuration
Axially, each projection for matching in pairs can be fastened togather with depression.
In the stator of this structure, the notch of each stator between cog is sealed by encapsulant, make stator teeth in a ring
Overall structure, stator yoke is in another overall structure, and the two is separable each other, therefore in stator assembly technology, by each armature
Winding can be plugged together by draw-in groove after being assemblied on corresponding stator tooth or fastened and directly the two links together, technique letter
Single, low cost, efficiency high eliminate the loaded down with trivial details technique of individually sealing notch, are easy to modularized production；On the other hand, due to for
Closed slot, it is also possible to reduce cogging torque and the torque pulsation of motor, improves the torque density of permanent magnet torque motor.
In view of the loss of permanent magnet torque motor, preferably, stator core described in the utility model is using nanocrystalline
Alloy material or high grade silicon steel material, the core loss of this material is less, it is possible to achieve the low damage under high frequency service condition
Consumption, high torque density operation, and the efficiency of motor increase.Further preferably, the stator core laminated by punching and
Into.
Preferably, described encapsulant adopts nanometer crystal alloy material.
The permanent magnet torque motor constituted using stator of the present utility model includes stator and rotor, in the stator and rotor
Between be working gas gap.At present, the rotor of permanent magnet torque motor adopts traditional magnet structure mostly, compares induced moment electricity
Machine torque density increases, but is applied to require that the occasion torque density such as higher Aero-Space, robot still is apparent not enough, because
This has document introduction to improve motor torque density using halbach permanent magnet arrays structure, improves electric efficiency.But, tradition
There is a problem of that permanent magnet magnetizes complexity in the processing of halbach permanent magnet arrays structure system, the problems such as inconvenience is installed.
For this purpose, the utility model further improves rotor structure, it is the structure supported by rotor core by rotor design,
Rotor core arranges rotor permanent magnet towards the surface of stator, i.e. rotor permanent magnet is arranged on the working gas gap side of rotor core；
Also, rotor permanent magnet includes cutting orientation magnetizing permanent magnet and radial magnetizing permanent magnetism body, two kinds of permanent magnets are alternateed and are arranged on
The working gas gap side of rotor core.The radial magnetizing permanent magnetism body refers to that its magnetic direction points to working gas gap or away from work
Air gap.When the magnetic direction of the radial magnetizing permanent magnetism body points to working gas gap, the magnetic field of its both sides cutting orientation magnetizing permanent magnet
Point to the radial magnetizing permanent magnetism body in direction；When the magnetic direction dorsad working gas gap of the radial magnetizing permanent magnetism body, its both sides
The magnetic direction of cutting orientation magnetizing permanent magnet deviates from the radial magnetizing permanent magnetism body.
That is, on the one hand the utility model adopts magnet structure, compares induced moment motor torque density and increases, separately
On the one hand design rotor permanent magnet is cutting orientation magnetizing permanent magnet and radial magnetizing permanent magnetism body, further increases motor torque close
Degree, and the Halbach array structure of permanent magnet is compared, magnetizing direction is simplified, reduce the complexity that magnetizes.
Further preferably, the cutting orientation magnetizing permanent magnet and radial magnetizing permanent magnetism body are the permanent magnets that Jing cuts arc process, i.e.,
With cutting arc structure.
Further preferably, the width ratio of the cutting orientation magnetizing permanent magnet and radial magnetizing permanent magnetism body is 0.25-1.
Further preferably, the rotor core is hollow-core construction.
In order to further improve motor torque density, the pole groove for realizing concentratred winding form coordinates, preferably, this
Number of stator slots described in utility model and rotor number of poles are combined as：Number of pole-pairs is p, and slot number is Q, and the number of pole-pairs of unit motor
p1=p/GCD (p, Q), slot number Q of unit motor1=Q/GCD (p, Q)=2p1± 1, and Q=3n, Q1=3n1, wherein p1、n、n1
For positive integer.
Description of the drawings
Fig. 1 is the cross-sectional view of the efficient high torque density permanent magnet torque motor in the utility model embodiment 1；
Fig. 2 is the section of the stator teeth of the efficient high torque density permanent magnet torque motor in the utility model embodiment 1
Structural representation；
Fig. 3 is the section of the stator yoke of the efficient high torque density permanent magnet torque motor in the utility model embodiment 1
Structural representation；
Fig. 4 is the magnetic direction figure of the rotor permanent magnet in Fig. 1；
Fig. 5 is that the efficient high torque density permanent magnet torque motor in the utility model embodiment 1 pastes structure forever with traditional face
The close comparison of magneto air gap radial direction magnetic；
Fig. 6 is that the efficient high torque density permanent magnet torque motor in the utility model embodiment 1 pastes structure forever with traditional face
Magneto torque-current Property comparison；
Fig. 7 is the stator teeth section knot of the efficient high torque density permanent magnet torque motor in the utility model embodiment 2
Structure schematic diagram；
Fig. 8 is the stator yoke section knot of the efficient high torque density permanent magnet torque motor in the utility model embodiment 2
Structure schematic diagram.
Reference in accompanying drawing 1-8 is：1st, stator；2nd, rotor；3rd, air gap；11st, stator yoke；12nd, stator teeth；13
Stator slot；14th, armature winding；21st, cutting orientation magnetizing permanent magnet；22nd, radial magnetizing permanent magnetism body；23rd, rotor core；41st, sealing material
Material；51st, it is raised；52nd, it is recessed；53rd, spill draw-in groove；54th, convex card article.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example is further elaborated to the utility model.It is to be appreciated that specific embodiment described herein is only used for explaining this
Utility model, is not used to limit the utility model.
Embodiment 1：
In the present embodiment, permanent magnet torque motor as shown in figure 1, including stator 1 and rotor 2, in the stator 1 and rotor 2
Between be working gas gap 3.
Stator 1 includes stator core and armature winding 14, and stator core includes stator yoke 11 and stator teeth 12, stator
Teeth portion 12 is made up of several stator tooths, and armature winding 14 detours on each stator tooth, is stator slot 13 between each adjacent stators tooth.
As shown in Fig. 2 sealing in the notch of each stator between cog by encapsulant 41, stator teeth is set integrally to tie in a ring
Structure.As shown in figure 3, stator yoke 11 is in another overall structure.Stator yoke 11 is separable each other with both stator teeths 12.
Such as Fig. 2, shown in 3, the opposite position in the end of each stator tooth and stator yoke is formed with what is matched in pairs
Projection 51 and depression 52, along the axial direction of the loop configuration, each projection for matching in pairs can be fastened on each other one with depression
Rise.
In the present embodiment, stator core is using nanometer crystal alloy material or high grade silicon steel material, the iron core of this material
Loss is less, it is possible to achieve the low-loss, high torque density under high frequency service condition, it is also possible to improve electric efficiency.Also, it is fixed
Sub- iron core is overrided to form by punching.
In the present embodiment, encapsulant 41 adopts nanometer crystal alloy material.
In the present embodiment, such as Fig. 1, shown in 4, rotor 2 is made up of rotor core 23 and rotor permanent magnet, and rotor core 23 is
Supporter, in for hollow-core construction.Towards the surface of stator 1, i.e. working gas gap side arranges rotor permanent magnet for rotor core 23.And
And, rotor permanent magnet includes cutting orientation magnetizing permanent magnet 21 and radial magnetizing permanent magnetism body 22, and two kinds of permanent magnets alternate setting
In the working gas gap side of rotor core 23.As shown in figure 4, radial magnetizing permanent magnetism body 22 refers to that its magnetic direction points to working gas gap
Or away from working gas gap.When the magnetic direction of the radial magnetizing permanent magnetism body 22 points to working gas gap, its both sides is tangentially filled
The magnetic direction of magnetic permanent magnet 21 points to the radial magnetizing permanent magnetism body；When the radial magnetizing permanent magnetism body 22 magnetic direction dorsad
During working gas gap, the magnetic direction of its both sides cutting orientation magnetizing permanent magnet 21 deviates from the radial magnetizing permanent magnetism body.
As shown in figure 4, cutting orientation magnetizing permanent magnet 21 and radial magnetizing permanent magnetism body 22 are the permanent magnet for cutting arc process.Also,
The width ratio of cutting orientation magnetizing permanent magnet 21 and radial magnetizing permanent magnetism body 22 is 0.25-1.
Comparative example 1：
In the present embodiment, the structure of the permanent magnet torque motor in the structure of permanent magnet torque motor and above-described embodiment 1 is basic
It is identical, except that rotor permanent magnet is traditional face patch structure.
Jing test, in embodiment 1 with comparative example 1 in permanent magnet torque motor torque-current Property comparison figure such as
Shown in Fig. 5, show compared with the motor with traditional face patch construction rotor permanent magnet in comparative example 1, in embodiment 1
Permanent magnet torque motor with cutting orientation magnetizing permanent magnet 21 and radial magnetizing permanent magnetism body 22 has higher radial air gap magnetic density.
Jing test, in embodiment 1 with comparative example 1 in permanent magnet torque motor torque-current Property comparison figure such as
Shown in Fig. 6, show compared with the motor with traditional face patch construction rotor permanent magnet in comparative example 1, in embodiment 1
Permanent magnet torque motor with cutting orientation magnetizing permanent magnet 21 and radial magnetizing permanent magnetism body 22 has higher motor torque.
Embodiment 2：
In the present embodiment, the structure of the permanent magnet torque motor in the structure of permanent magnet torque motor and above-described embodiment 1 is basic
Identical, except that such as Fig. 7, shown in 8, the opposite position in the end of each stator tooth and stator yoke is formed with paired phase
The convex card article 54 of matching and spill draw-in groove 53, along the axial direction of the loop configuration, each convex card article for matching in pairs with it is recessed
Shape draw-in groove can be plugged together together.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that common for this area
For technical staff, without departing from the concept of the premise utility, some deformations and improvement can also be made, these all belong to
In protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be defined by claims.
Claims (8)
1. a kind of stator of permanent magnet torque motor, including stator core and armature winding, stator core includes stator yoke and fixed
Sub- teeth portion, stator teeth is made up of several stator tooths, and armature winding detours on each stator tooth, is between each adjacent stators tooth
Groove；It is characterized in that：
The stator yoke is separable with stator teeth；
Described each notch is sealed by encapsulant, makes each stator tooth form loop configuration with the encapsulant of notch；
Opposite position in the end of each stator tooth and stator yoke is formed with the convex card article and spill card for matching in pairs
Groove, along the axial direction of the loop configuration, together with each convex card article for matching in pairs can be plugged together with spill draw-in groove；
Or, the end of each stator tooth and the opposite position of stator yoke be formed with the projection that matches in pairs with it is recessed
Fall into, along the axial direction of the loop configuration, each projection for matching in pairs can be snapped together with depression.
2. the stator of permanent magnet torque motor as claimed in claim 1, is characterized in that：Described stator core laminated by punching and
Into.
3. a kind of permanent magnet torque motor with high torque density, is characterized in that：Including stator and rotor, between stator and rotor
For working gas gap, the stator using the permanent magnet torque motor described in claim 1 or 2 stator.
4. the permanent magnet torque motor with high torque density as claimed in claim 3, is characterized in that：The rotor is by rotor iron
The heart is constituted with rotor permanent magnet, and rotor permanent magnet is arranged on the working gas gap side of rotor core, and rotor permanent magnet includes cutting
To charging permanent magnet and radial magnetizing permanent magnetism body, two kinds of permanent magnets alternate setting.
5. the permanent magnet torque motor with high torque density as claimed in claim 4, is characterized in that：Described cutting orientation magnetizing is forever
Magnet and radial magnetizing permanent magnetism body are to cut arc structure.
6. the permanent magnet torque motor with high torque density as claimed in claim 4, is characterized in that：Described cutting orientation magnetizing is forever
The width ratio of magnet and radial magnetizing permanent magnetism body is 0.25-1.
7. the permanent magnet torque motor with high torque density as claimed in claim 3, is characterized in that：The rotor core is sky
Core structure.
8. the permanent magnet torque motor with high torque density as claimed in claim 3, is characterized in that：The number of stator slots and turn
Sub- number of poles is combined as：Number of pole-pairs is p, and slot number is Q, and number of pole-pairs p of unit motor1=p/GCD (p, Q), unit motor
Slot number Q1=Q/GCD (p, Q)=2p1± 1, and Q=3n, Q1=3n1, wherein p1、n、n1For positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134045.9U CN206164227U (en) | 2016-10-18 | 2016-10-18 | Stator of permanent magnetic force square motor and permanent magnetic force square motor that has high rotation torque density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134045.9U CN206164227U (en) | 2016-10-18 | 2016-10-18 | Stator of permanent magnetic force square motor and permanent magnetic force square motor that has high rotation torque density |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206164227U true CN206164227U (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621134045.9U Active CN206164227U (en) | 2016-10-18 | 2016-10-18 | Stator of permanent magnetic force square motor and permanent magnetic force square motor that has high rotation torque density |
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| Country | Link |
|---|---|
| CN (1) | CN206164227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959361A (en) * | 2016-10-18 | 2018-04-24 | 中国科学院宁波材料技术与工程研究所 | The stator of permanent magnet torque motor and the permanent magnet torque motor with high torque density |
-
2016
- 2016-10-18 CN CN201621134045.9U patent/CN206164227U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959361A (en) * | 2016-10-18 | 2018-04-24 | 中国科学院宁波材料技术与工程研究所 | The stator of permanent magnet torque motor and the permanent magnet torque motor with high torque density |
| CN107959361B (en) * | 2016-10-18 | 2024-04-23 | 中国科学院宁波材料技术与工程研究所 | Stator of permanent magnet torque motor and permanent magnet torque motor with high torque density |
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