CN110336438A - V-type segmented composite magnetoelectric machine - Google Patents
V-type segmented composite magnetoelectric machine Download PDFInfo
- Publication number
- CN110336438A CN110336438A CN201910643130.XA CN201910643130A CN110336438A CN 110336438 A CN110336438 A CN 110336438A CN 201910643130 A CN201910643130 A CN 201910643130A CN 110336438 A CN110336438 A CN 110336438A
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- Prior art keywords
- permanent magnet
- magnet
- permanent
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- rotor
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Classifications
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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
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
-
- 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
- H02K1/2706—Inner rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/022—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
A kind of V-type segmented composite magnetoelectric machine, is related to technical field of motors, and the solution is to improve weak magnetism speed expansion ability.The motor includes stator, rotor, and the rotor is equipped with multiple permanent magnet units, and each permanent magnet unit is symmetrically spaced laying around the axle center of rotor, and each permanent magnet unit is divided into symmetrical two halves by the d-axis of rotor；The permanent magnet unit includes multiple permanent magnetism slots, each permanent magnetism slot cloth is set as V-shape, and each permanent magnetism slot mutually separates, and a built-up magnet is equipped in each permanent magnetism slot, and each built-up magnet in same unit constitutes the both ends V-shaped built-up magnet array of one end inwardly outwardly；The built-up magnet is laminated by the first permanent magnet, the second permanent magnet, and the first permanent magnet is located at the outside of the second permanent magnet, and the coercivity of the first permanent magnet is greater than the coercivity of the second permanent magnet.Motor provided by the invention is able to satisfy electric car, hybrid vehicle driving requires.
Description
Technical field
The present invention relates to motor technologies, more particularly to a kind of technology of V-type segmented composite magnetoelectric machine.
Background technique
Drive system of electric automobile all uses internal permanent magnet synchronous motor (IPMSM) as power source, built-in type permanent-magnet
Synchronous motor uses permanent magnet excitation, and magnetic field is constant, is not adjustable, therefore haves the defects that weak magnetism speed expansion ability is difficult.
One timing of the parameter of electric machine and size, revolving speed increase with voltage and are risen, the output-constant operation region more than base speed, with revolving speed
It increases, due to the limitation of supply voltage (Motor for Electric Automobile is battery powered), it is difficult to invariable power speed-raising；In addition, in motor
D-axis (d axis) on, for the magnetic conductivity of permanent magnet close to air, d-axis inductance Ld is small, increases the difficulty of weak magnetic speed-up.
Existing internal permanent magnet synchronous motor must be by weak magnetic, by adjusting stator current (i.e. increase stator d-axis
Demagnetizing current component-Id) reluctance torque is obtained, it is equivalent to directly to weaken excitation field with the decrease in motor gas-gap magnetic field
Reach weak magnetic, weak magnetism speed expansion narrow range, stator loss is big, system (motor and controller) low efficiency, while increasing d-axis armature
Electric current-Id will lead to magnet steel irreversible demagnetization risk, and rotor centrifugal force and cost will be increased again by thickening magnet steel.Therefore existing interior
Formula permanent magnet synchronous motor is set there is power and torque density are low, high speed constant power bracket is narrow, torque ripple is big, overload capacity and
The defects of system effectiveness is low, magnet steel demagnetization risk is big and poor reliability, these defects restrict the research and development and its production of driving motor
Industry progress.
Summary of the invention
For above-mentioned defect existing in the prior art, technical problem to be solved by the invention is to provide a kind of expansions of weak magnetic
The good V-type segmented composite magnetoelectric machine of fast ability.
In order to solve the above-mentioned technical problem, a kind of V-type segmented composite magnetoelectric machine provided by the present invention, including it is fixed
Son, rotor, the rotor are equipped with multiple permanent magnet units, and each permanent magnet unit is symmetrically spaced laying around the axle center of rotor, and
And each permanent magnet unit is divided into symmetrical two halves by the d-axis of rotor；It is characterized by:
The permanent magnet unit includes multiple permanent magnetism slots, and each permanent magnetism slot cloth is set as V-shape, and each permanent magnetism slot mutually separates,
A built-up magnet is equipped in each permanent magnetism slot, each built-up magnet in same unit constitutes both ends one end outwardly
V-shaped built-up magnet array inwardly；
The built-up magnet is laminated by the first permanent magnet, the second permanent magnet, and the first permanent magnet is located at the second permanent magnet
Outside, and the coercivity of the first permanent magnet be greater than the second permanent magnet coercivity.
Further, the length of the first permanent magnet is identical as the length of the second permanent magnet.
Further, thickness of the thickness of the first permanent magnet less than the second permanent magnet.
Further, the thickness of the second permanent magnet is 1.6~2.0 times of the thickness of the first permanent magnet.
Further, the permanent magnet unit further includes two round magnet isolation tanks, and two round magnet isolation tanks are laid in V word respectively
The outside of two outer ends of type built-up magnet array.
Further, the taper auxiliary tank of interior thin outer width is offered in the middle part of the permanent magnet unit.
V-type segmented composite magnetoelectric machine provided by the invention, utilizes the coercivity of neodymium iron boron and alnico permanent magnetic material
Property difference forms concatenated built-up magnet p-m rotor on magnetic circuit, can obtain higher air-gap flux, improves efficiency and function
Rate, torque density, and the d-axis armature reaction MMF that can be generated by the vector pulse of stator direct-axis current, to regulate and control permanent magnetism slot
In interior built-up magnet, the low alnico degaussing of coercivity and magnetization degree make a part of main flux pass through alnico local bypass,
Become leakage magnetic flux, reaches weak magnetism speed expansion, the operation of low speed permanent torque, high speed output-constant operation, and obtain than existing permanent magnet synchronous electric
The broader constant power speed range of machine, increases substantially motor integrated quality, realizes high power density, wide range speed control, fast sound
It answers, frequent starting and even running, meets electric car, hybrid vehicle driving requires.
Detailed description of the invention
Fig. 1 is the local radial schematic cross-section of the V-type segmented composite magnetoelectric machine of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with Detailed description of the invention, but the present embodiment is not used to limit
The system present invention, all that protection scope of the present invention should all be included in using similar structure and its similar variation of the invention, present invention
In pause mark indicate the relationship of sum, the English alphabet in the present invention is case sensitive.
As shown in Figure 1, a kind of V-type segmented composite magnetoelectric machine provided by the embodiment of the present invention, including stator is (in figure
Do not show), rotor 1, the rotor 1 is equipped with multiple permanent magnet units, and each permanent magnet unit is symmetrically spaced cloth around the axle center of rotor
And if each permanent magnet unit is divided into symmetrical two halves by the d-axis of rotor (pole center line, d axis)；It is characterized by:
The permanent magnet unit includes multiple permanent magnetism slots, and each permanent magnetism slot cloth is set as V-shape, and each permanent magnetism slot mutually separates,
A built-up magnet is equipped in each permanent magnetism slot, each built-up magnet in same unit constitutes both ends one end outwardly
V-shaped built-up magnet array inwardly；
The built-up magnet is laminated by the first permanent magnet 21, the second permanent magnet 22, and the first permanent magnet 21 is located at second
The outside (being outside towards rotor outer circle side) of permanent magnet 22, and the coercivity of the first permanent magnet 21 is greater than the second permanent magnet
22 coercivity, and in the radial section of rotor, the length of the first permanent magnet 21 is identical as the length of the second permanent magnet 22,
The thickness h 1 of first permanent magnet less than the thickness h 2(of the second permanent magnet set built-up magnet with a thickness of h0, then h0=h1+h2)；
In the embodiment of the present invention, the permanent magnet unit further includes two round magnet isolation tanks 3, and two round magnet isolation tanks 3 are laid respectively
In the outside of two outer ends of V-shape built-up magnet array, for reducing leakage field.
In the embodiment of the present invention, the taper auxiliary tank 4 of interior thin outer width is offered in the middle part of the permanent magnet unit, opens up auxiliary
Slot 4 can reduce core loss, improve air-gap field waveform, reduce torque ripple, inhibit static and dynamic armature-reaction degaussing,
Realize efficient, high power density, low speed permanent torque and high speed invariable power expansion speed even running.
In the built-up magnet of the embodiment of the present invention, the thickness proportion preferred embodiment of the first permanent magnet and the second permanent magnet are as follows:
The thickness of second permanent magnet is 1.6~2.0 times of the thickness of the first permanent magnet.
In the embodiment of the present invention, the round magnet isolation tank on the outside of two outer ends of V-shape built-up magnet array plays reduction leakage field
Effect, built-up magnet array and pole shoe (rotor core) magnetic poles, the first permanent magnet is using neodymium iron boron magnetic body, and second forever
Magnet is connected on magnetic circuit using alnico magnet, the first permanent magnet with the second permanent magnet, neodymium iron boron magnetic body and alnico
The remanent magnetism of magnet is closer to, but coercivity difference is very big, and neodymium iron boron magnetic body is difficult to degaussing and magnetization, and alnico magnet is easy degaussing
And magnetization；Optimize the thickness proportion of the first permanent magnet, the second permanent magnet, higher air-gap flux can be obtained, improve efficiency and
Power, torque density, and can be regulated and controled by the d-axis armature reaction MMF that the direct-axis current vector id pulse of rotor generates
In permanent magnetism slot in built-up magnet, the magnetization and degaussing degree of the second low permanent magnet of coercivity (increase to regulate and control air gap main flux
Strong or decrease)；When the second permanent magnet degaussing, makes a part of main flux by the second permanent magnet local bypass (short circuit), become to leak
Magnetic flux, air gap main flux weaken, and reach weak magnetism speed expansion, the operation of low speed permanent torque, high speed output-constant operation, and obtain than it is existing forever
The broader constant power speed range of magnetic-synchro motor；It connects on magnetic circuit, the strip rectangle built-up magnet that formation is whole integrally fills
After magnetic in permanent magnetism slot, compact-sized, anti-high speed centrifugation power can be effectively reduced motor noise and torque ripple, make motor
Integrated quality significantly improves, and realizes high power density, wide range speed control, fast-response, frequent starting and even running, meets electronic vapour
Vehicle, hybrid vehicle driving require；It can get the perseverance more broader than the internal permanent magnet synchronous motor of existing V-type permanent-magnet structure
Power speed range；
The position separated between adjacent permanent magnet slot forms magnetic conduction bridge 5, and magnetic conduction bridge 5 is saturated shape in magnetic circuit to permanent magnet flux when unloaded
State, permanent magnet flux are difficult to through magnetic conduction bridge；When load, under stator current effect, the degaussing of armature-reaction makes a part of permanent magnetism
Magnetic flux flows to the magnetic conduction bridge between adjacent sectional magnet steel, becomes leakage magnetic flux, makes to reduce by the magnetic flux density of air gap.Adjust magnetic conduction bridge
Width (section), i.e., the saturation of magnetic path of adjustable magnetic conduction bridge, so that the permanent magnet flux of regulatory pathway magnetic conduction bridge (forms leakage
Magnetic flux), regulate and control the reduction degree of air gap flux density.Due to one timing of the parameter of electric machine and size, torque is directly proportional to air gap flux density, turns
Speed is inversely proportional with air gap flux density, to further enhance the effect of high regime weak magnetic invariable power expansion speed and range.
Claims (6)
1. a kind of V-type segmented composite magnetoelectric machine, including stator, rotor, the rotor is equipped with multiple permanent magnet units, each
Permanent magnet unit is symmetrically spaced laying around the axle center of rotor, and each permanent magnet unit is divided into symmetrical two by the d-axis of rotor
Half；It is characterized by:
The permanent magnet unit includes multiple permanent magnetism slots, and each permanent magnetism slot cloth is set as V-shape, and each permanent magnetism slot mutually separates,
A built-up magnet is equipped in each permanent magnetism slot, each built-up magnet in same unit constitutes both ends one end outwardly
V-shaped built-up magnet array inwardly；
The built-up magnet is laminated by the first permanent magnet, the second permanent magnet, and the first permanent magnet is located at the second permanent magnet
Outside, and the coercivity of the first permanent magnet be greater than the second permanent magnet coercivity.
2. V-type segmented composite magnetoelectric machine according to claim 1, it is characterised in that: the length of the first permanent magnet with
The length of second permanent magnet is identical.
3. V-type segmented composite magnetoelectric machine according to claim 1, it is characterised in that: the thickness of the first permanent magnet is small
In the thickness of the second permanent magnet.
4. V-type segmented composite magnetoelectric machine according to claim 3, it is characterised in that: the thickness of the second permanent magnet is
1.6~2.0 times of the thickness of first permanent magnet.
5. V-type segmented composite magnetoelectric machine according to claim 1, it is characterised in that: the permanent magnet unit further includes
Two round magnet isolation tanks, two round magnet isolation tanks are laid in the outside of two outer ends of V-shape built-up magnet array respectively.
6. V-type segmented composite magnetoelectric machine according to claim 1, it is characterised in that: the middle part of the permanent magnet unit
Offer the taper auxiliary tank of interior thin outer width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910643130.XA CN110336438A (en) | 2019-07-17 | 2019-07-17 | V-type segmented composite magnetoelectric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910643130.XA CN110336438A (en) | 2019-07-17 | 2019-07-17 | V-type segmented composite magnetoelectric machine |
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| Publication Number | Publication Date |
|---|---|
| CN110336438A true CN110336438A (en) | 2019-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910643130.XA Pending CN110336438A (en) | 2019-07-17 | 2019-07-17 | V-type segmented composite magnetoelectric machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436633A (en) * | 2020-11-12 | 2021-03-02 | 哈尔滨工业大学 | Three-section type V-shaped series-parallel combined magnetic pole adjustable flux motor |
-
2019
- 2019-07-17 CN CN201910643130.XA patent/CN110336438A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436633A (en) * | 2020-11-12 | 2021-03-02 | 哈尔滨工业大学 | Three-section type V-shaped series-parallel combined magnetic pole adjustable flux motor |
| CN112436633B (en) * | 2020-11-12 | 2022-03-08 | 哈尔滨工业大学 | Three-section type V-shaped series-parallel combined magnetic pole adjustable flux motor |
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