CN109756091A - A kind of weak magnetic speed-up magneto - Google Patents
A kind of weak magnetic speed-up magneto Download PDFInfo
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- CN109756091A CN109756091A CN201811573761.0A CN201811573761A CN109756091A CN 109756091 A CN109756091 A CN 109756091A CN 201811573761 A CN201811573761 A CN 201811573761A CN 109756091 A CN109756091 A CN 109756091A
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Abstract
The invention discloses a kind of weak magnetic speed-up magnetoes, it is made of stator winding, stator core and p-m rotor, magnetism-regulating structure is provided in rotor rim between two adjacent permanent magnets, the magnetism-regulating structure is made of the adjustable magnetic chamber radially arranged and the adjustable magnetic block that can be moved radially, adjustable magnetic is intracavitary to be additionally provided with the elastic element connecting with adjustable magnetic block, elastic element one end is connect with adjustable magnetic block, and other end is fixed, and adjustable magnetic top of chamber opening is limited equipped with adjustable magnetic block；The present invention utilizes rotary centrifugal force principle, it is mobile to outer circle by the adjustable magnetic block as permanent magnetic circuit a part, it is staggered on adjustable magnetic block and former rotor yoke radial dimension, to increase rotor magnetic resistance, motor permanent magnet flux will increase automatic reduction with revolving speed, reach mechanical weak magnetic effect；Direct adjusting to permanent magnetic field can be achieved, ensure that high efficiency and High Power Factor during weak magnetic speed-up, reduce overvoltage risk, and further expansion weak-magnetic speed-regulating range can be combined with stator winding electricity weak magnetic.
Description
Technical field
The invention belongs to technical field of motors more particularly to a kind of traction permanent magnetic motors for needing weak magnetic speed-up.
Background technique
Magneto is widely applied in automobile power drive system at present, also just gradually leads in electric locomotive, rail traffic
Domain is as traction electric machine application.
These fields require that power drive system has the function of weak magnetism speed expansion, i.e. rated speed and permanent torque claimed below is negative
Carrying characteristic, (motor permanent magnet flux is constant at this time, all torque currents of stator current, and motor terminal voltage becomes with revolving speed direct proportion
Change, in rated speed, end voltage reaches maximum value and is equal to voltage rating)；It is special in rated speed requirements above constant power load
Property (at this time since permanent magnet flux can not be adjusted, only pass through stator apply demagnetizing current, reduce main flux, realize motor side electricity
Pressure increases with revolving speed and keeps voltage rating constant, and motor will keep rated current, rated power operation, and torque will be with revolving speed
It increases and linear decline).
The operational mode for needing weak magnetic speed-up magneto above, in the above weak magnetic field operation of rated speed, stator current
To have and greatly be used to weak magnetic, and reduce operational efficiency；Typically up to revolving speed is up to 3 times of rated speed even more
Height, the back-emf that permanent magnet flux generates in maximum speed will be much higher than voltage rating, once there is deviation in weak magnetoelectricity stream, entirely
Drive system will face very big over-voltage risk.
Summary of the invention
For the deficiency for the weak magnetic technology for applying demagnetizing current by stator winding in the prior art, the present invention provides one kind
Weak magnetic speed-up magneto.
The technical scheme adopted by the invention is that: a kind of weak magnetic speed-up magneto, stationary part are regular alternating current electricity
Machine stator is made of stator winding, stator core and p-m rotor, two neighboring permanent magnetism in the rotor rim of the p-m rotor
Between body, i.e. magnetic flux maximum is provided with magnetism-regulating structure between two magnetic poles, the magnetism-regulating structure by the adjustable magnetic chamber radially arranged and
Set on the intracavitary adjustable magnetic block composition moved radially of adjustable magnetic, adjustable magnetic is intracavitary to be additionally provided with the elastic element connecting with adjustable magnetic block, bullet
Property element one end connect with adjustable magnetic block, other end is fixed, adjustable magnetic top of chamber opening equipped with adjustable magnetic block limit.
Further, the elastic element is drawing elastic element, is located at adjustable magnetic block bottom end.
Further, the elastic element is compression elastic element, is located between adjustable magnetic block and the limit of adjustable magnetic block.
A kind of weak magnetic speed-up magneto, adjustable magnetic block use the ferromagnetic material of magnetic conduction.
Further, the p-m rotor is inside stator winding and stator core, i.e., mechanical weak magnetic speed-up magneto
For inner rotor core.
Further, the stator winding and stator core are inside p-m rotor, i.e., mechanical weak magnetic speed-up magneto
For outer-rotor structure.
The beneficial effect comprise that: rotary centrifugal force principle is utilized, is adjusted by being arranged in rotor permanent magnet magnetic circuit
Magnetic structure, when rotor speed increases, the adjustable magnetic block as permanent magnetic circuit a part is acted on by rotary centrifugal force to outer circle movement,
It is staggered on adjustable magnetic block and former rotor yoke radial dimension, to increase rotor magnetic resistance, motor permanent magnet flux will increase certainly with revolving speed
It is dynamic to reduce, reach mechanical weak magnetic effect, realizes magneto weak magnetic liter under the premise of holding voltage, power factor is basically unchanged
Speed；On the basis of realizing mechanical weak magnetic speed-up, it still can apply demagnetizing current in conjunction in stator winding, realize mechanically and electrically
Joint weak magnetic further promotes weak magnetic speed-up space and performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of inner rotor core motor of the present invention；
Fig. 2 is the partial enlarged view of part A in Fig. 1；
Fig. 3 is the operation mechanism figure of inner rotor core motor of the present invention；
Fig. 4 is the structural schematic diagram of outer-rotor structure motor of the present invention.
Each appended drawing reference are as follows: 1-stator winding, 2-stator cores, 3-permanent magnets, 4-rotor rims, 5-adjustable magnetic chambers,
The limit of 6-adjustable magnetic blocks, 7-elastic elements, 8-adjustable magnetic blocks.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Embodiment 1
It is a basic embodiment of the invention shown in Fig. 1.The motor uses inner rotor radial durface mounted permanent magnet magnetic pole pattern,
Stationary part is regular alternating current motor stator, is made of stator winding 1, stator core 2 and p-m rotor, sets on p-m rotor
Magnetism-regulating structure is set, magnetism-regulating structure should be arranged in rotor rim 4 between two adjacent permanent magnets 3, i.e. magnetic flux is maximum between two magnetic poles
Place is mainly made of adjustable magnetic chamber 5, adjustable magnetic block limit 6, elastic element 7, adjustable magnetic block 8；The adjustable magnetic block 8 and 7 one end of elastic element
Fixed, 7 other end of elastic element is fixed, and adjustable magnetic block 8 can move radially in adjustable magnetic chamber 5；The adjustable magnetic block 8 should be adopted
With the ferromagnetic material of magnetic conduction；The elastic element 7 can be drawing elastic element, and tension spring as shown in Figure 2 is also possible to press
Contracting elastic element such as compressed spring, elastic element 7 should be arranged between adjustable magnetic block 8 and adjustable magnetic block limit 6 at this time, adjustable magnetic block limit
Position 6 is for preventing adjustable magnetic block 8 from running out of adjustable magnetic chamber 5；The adjustable magnetic block 8 is increasingly closer to permanent magnet 3 when mobile to outer circle, will increase
3 leakage field of permanent magnet, will be further reduced permanent magnetism main flux, and when specific implementation should accurately calculate.
Machinery weak magnetic speed-up mechanism when magneto of the invention works are as follows: the magnetic that adjustable magnetic block 8 is provided by permanent magnet flux
Power Ft, the elastic force Fx and rotary centrifugal force Fm collective effect that elastic element 7 provides, its adjustable magnetic mechanism is shown in during rotational speed regulation
Fig. 3, revolving speed from 0 rise to rated speed nN during, permanent magnet flux does not change so Ft=0, rotary centrifugal force only make bullet
Property element 7 deformation be Fm=Fx, adjustable magnetic block 8 radially circle movement；When reaching rated speed, adjustable magnetic block 8 reaches permanent magnetic flux
Extreme position, the point correspond to the maximum speed of the permanent magnetic flux operation of magneto；Revolving speed continues to rise from rated speed, due to adjusting
Magnetic patch 8 is continued mobile to outer circle by Fm effect, and position will extend over permanent magnetic flux extreme position, permanent magnet flux will persistently reduce and by
Step generates Ft, and Fx persistently increases because elastic element 7 further deforms, at this time Fm=Ft+Fx；Continue to rise to when revolving speed so that
Adjustable magnetic block 8 just arrives to adjustable magnetic block limit 6, and Ft and Fx reaches maximum value at this time, and the magnetic flux of permanent magnet 3 reaches minimum at this time
Value；If revolving speed continues growing, Fm will continue to increase, and Ft=consant, Fx=consant no longer change, and Fm > Ft+ will occur
Fx, extra centrifugal force will limit 6 by adjustable magnetic block and undertake, and permanent magnet flux will keep minimum value no longer to change.
Down speeding procedure mechanism is identical as boosting velocity procedure.
Embodiment 2
As shown in figure 4, the motor uses external rotor radial durface mounted permanent magnet magnetic pole pattern, magnetism-regulating structure is interior with embodiment 1
Rotor structure is similar, the difference is that not will increase forever when the adjustable magnetic block 8 is mobile to outer circle more and more far away from permanent magnet 3
3 leakage field of magnet.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (6)
1. a kind of weak magnetic speed-up magneto is made of stator winding (1), stator core (2) and p-m rotor, feature exists
In: magnetism-regulating structure, the adjustable magnetic are provided between two adjacent permanent magnets (3) in the rotor rim (4) of the p-m rotor
Structure is made of the adjustable magnetic chamber (5) radially arranged and the adjustable magnetic block (8) that can be moved radially in adjustable magnetic chamber (5), adjustable magnetic chamber
(5) it is additionally provided with the elastic element (7) connecting with adjustable magnetic block (8) in, elastic element (7) one end is connect with adjustable magnetic block (8), and in addition one
Hold it is fixed, adjustable magnetic chamber (5) top open part be equipped with adjustable magnetic block limit (6).
2. a kind of weak magnetic speed-up magneto according to claim 1, which is characterized in that the elastic element (7) is
Drawing elastic element is located at adjustable magnetic block (8) bottom end.
3. a kind of weak magnetic speed-up magneto according to claim 1, which is characterized in that the elastic element (7) is
Compression elastic element is located between adjustable magnetic block (8) and adjustable magnetic block limit (6).
4. a kind of weak magnetic speed-up magneto according to claim 1 or 2 or 3, which is characterized in that the adjustable magnetic block
(8) ferromagnetic material is used.
5. a kind of weak magnetic speed-up magneto according to claim 4, which is characterized in that the p-m rotor is in stator
Winding (1) and stator core (2) are internal.
6. a kind of weak magnetic speed-up magneto according to claim 4, which is characterized in that the stator winding (1) and
Stator core (2) is inside p-m rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573761.0A CN109756091A (en) | 2018-12-21 | 2018-12-21 | A kind of weak magnetic speed-up magneto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573761.0A CN109756091A (en) | 2018-12-21 | 2018-12-21 | A kind of weak magnetic speed-up magneto |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109756091A true CN109756091A (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811573761.0A Pending CN109756091A (en) | 2018-12-21 | 2018-12-21 | A kind of weak magnetic speed-up magneto |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821615A (en) * | 2021-02-24 | 2021-05-18 | 上海电机学院 | Rotor structure for flux weakening and speed increasing of permanent magnet synchronous motor for tangential magnetization |
| CN113315269A (en) * | 2021-05-31 | 2021-08-27 | 河北工业大学 | Stator type permanent magnet synchronous motor with flux weakening function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252642A (en) * | 1999-11-19 | 2000-05-10 | 南海汇泉科技工业园有限公司 | Permanent magnet motor with weak magnetism speed expansion |
| CN101783536A (en) * | 2009-10-22 | 2010-07-21 | 上海海事大学 | Automatic field-weakening method for built-in permanent magnet synchronous motor |
| CN102710043A (en) * | 2012-05-23 | 2012-10-03 | 黑龙江大学 | Permanent magnet motor rotor with excitation circuit variable reluctance and leakage flux path function |
| CN102710044A (en) * | 2012-05-23 | 2012-10-03 | 黑龙江大学 | Self-adaptive passive flux-weakening permanent magnet synchronous rotor |
-
2018
- 2018-12-21 CN CN201811573761.0A patent/CN109756091A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252642A (en) * | 1999-11-19 | 2000-05-10 | 南海汇泉科技工业园有限公司 | Permanent magnet motor with weak magnetism speed expansion |
| CN101783536A (en) * | 2009-10-22 | 2010-07-21 | 上海海事大学 | Automatic field-weakening method for built-in permanent magnet synchronous motor |
| CN102710043A (en) * | 2012-05-23 | 2012-10-03 | 黑龙江大学 | Permanent magnet motor rotor with excitation circuit variable reluctance and leakage flux path function |
| CN102710044A (en) * | 2012-05-23 | 2012-10-03 | 黑龙江大学 | Self-adaptive passive flux-weakening permanent magnet synchronous rotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821615A (en) * | 2021-02-24 | 2021-05-18 | 上海电机学院 | Rotor structure for flux weakening and speed increasing of permanent magnet synchronous motor for tangential magnetization |
| CN113315269A (en) * | 2021-05-31 | 2021-08-27 | 河北工业大学 | Stator type permanent magnet synchronous motor with flux weakening function |
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Application publication date: 20190514 |