CN108777522A - Motor rotor and permanent magnet motor - Google Patents
Motor rotor and permanent magnet motor Download PDFInfo
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- CN108777522A CN108777522A CN201810904388.6A CN201810904388A CN108777522A CN 108777522 A CN108777522 A CN 108777522A CN 201810904388 A CN201810904388 A CN 201810904388A CN 108777522 A CN108777522 A CN 108777522A
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- 230000005389 magnetism Effects 0.000 claims description 104
- 239000004744 fabric Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 230000005347 demagnetization Effects 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a motor rotor and a permanent magnet motor. The motor rotor comprises a rotor core (1) and a first permanent magnet pole and a second permanent magnet pole which are alternately arranged along the circumferential direction of the rotor core (1), wherein the coercive force of the permanent magnet on the first permanent magnet pole is higher than that of the permanent magnet on the second permanent magnet pole. According to the motor rotor disclosed by the invention, the magnetizing current of the motor can be effectively reduced, the demagnetizing current of the motor is increased, the stability of a magnetic loop is ensured when the motor normally operates, and the efficiency of the motor is improved.
Description
Technical field
The invention belongs to technical field of motors, and in particular to a kind of rotor and magneto.
Background technology
Conventional permanent magnet motor provides magnetic flux by permanent magnet, but permanent magnet provides magnetic field and fixes, and motor internal magnetic field is difficult to
It adjusts, efficiency when magneto being made to be difficult to take into account high and low frequency.And it is fixed in power supply voltage, it limits
The maximum running frequency of motor.
Currently, the shortcomings that magneto internal magnetic field is difficult to adjust mostly, results in motor maximum speed by input direct-current
The problems such as factors such as busbar voltage limit, and motor low speed, high-speed cruising area efficiency are difficult to take into account, and common variable magnetic is powered
Machine, low-coercivity magnet steel are influenced by high-coercive force magnet steel, fill that demagnetization current is larger, can increase low-coercivity magnet steel to fill demagnetization difficult
Degree reduces electric efficiency.
Invention content
Therefore, the technical problem to be solved in the present invention is to provide a kind of rotor and magneto, can effectively subtract
Small machine magnetizes electric current, increases motor demagnetization current, ensures magnetic loop stability when motor normal operation, promotes electric efficiency.
To solve the above-mentioned problems, the present invention provides a kind of rotor, including rotor core and the week along rotor core
To the first permanent-magnet pole and the second permanent-magnet pole being arranged alternately, the coercivity of the permanent magnet in the first permanent-magnet pole is higher than the second permanent-magnet pole
On permanent magnet coercivity.
Preferably, the first permanent-magnet pole includes the first permanent magnet, pole center line of first permanent magnet about the first permanent-magnet pole
Symmetrically.
Preferably, the first permanent magnet is in "-" type, V-type or W types.
Preferably, the second permanent-magnet pole includes the second permanent magnet, pole center line of second permanent magnet about the second permanent-magnet pole
Symmetrically.
Preferably, the second permanent-magnet pole further includes third permanent magnet, pole center of the third permanent magnet about the second permanent-magnet pole
Line is symmetrical, and the second permanent magnet is located at the both ends of the circumferential direction of third permanent magnet.
It is in W types to be preferably located at the second permanent magnet of same permanent-magnet pole and third permanent magnet.
Preferably, meet between the first permanent magnet, the second permanent magnet and third permanent magnet：
0.9H1≤H2；
Hcj3*Br3*H3≤3/4*Hcj1*Br1*H1；
0.8Hcj3≤Hcj2≤1.3Hcj3；
Wherein H1 is the thickness of the first permanent magnet, and H2 is the thickness of the second permanent magnet, and H3 is the thickness of third permanent magnet,
Hcj1 is the coercivity of the first permanent magnet, and Br1 is the remanent magnetism of the first permanent magnet, and Hcj2 is the coercivity of the second permanent magnet, and Br2 is
The remanent magnetism of second permanent magnet, Hcj3 are the coercivity of third permanent magnet, and Br3 is the remanent magnetism of third permanent magnet.
Preferably, the coercivity of third permanent magnet is more than the coercivity of the second permanent magnet.
Preferably, the second permanent magnet is different with the thickness of third permanent magnet and/or the trade mark is different.
Preferably, the angle between the second permanent magnet and third permanent magnet is 30 ° of θ >.
Preferably, the second permanent magnet and the first permanent magnet form cascaded structure in magnetic loop.
Preferably, when the first permanent magnet is W types, it is provided with the first permanent magnetism slot in the first permanent-magnet pole, is set in the second permanent-magnet pole
It is equipped with the second permanent magnetism slot, the first permanent magnet is arranged in the first permanent magnetism slot, and the second permanent magnet is arranged in the second permanent magnetism slot, and first
Angle between permanent magnetism slot and the second permanent magnetism slot is 1≤30 ° of -5 °≤θ.
Preferably, the second permanent-magnet pole includes the second permanent magnetism slot and third permanent magnetism slot, and the second permanent magnet is arranged in the second permanent magnetism
In slot, third permanent magnet is arranged in third permanent magnetism slot, and the second permanent magnet portion stretches into third permanent magnetism slot, and the second permanent magnet
It is H4 close to the maximum height of the second permanent magnet side side wall that the part of third permanent magnetism slot, which is stretched into, relative to third permanent magnetism slot, wherein
H4/H2 < 0.3, H2 are the thickness of the second permanent magnet.
Preferably, when the first permanent magnet is W types, the first permanent magnetism slot, the setting of the first permanent magnet are provided in the first permanent-magnet pole
In the first permanent magnetism slot, in the section of the central axis of rotor core, the outer edge and second of the first permanent magnetism slot is forever
Minimum range between the outer edge of magnetic slot is H, and the thickness of the first permanent magnet is H1, and the second permanent magnetism slot is close to the first permanent magnetism slot
Maximum distance between side wall and the first permanent-magnet pole and the interface of the second permanent-magnet pole is H5, wherein：
H≥2H1；
0.5*H1≤H5≤H1。
Preferably, in the section of the central axis of rotor core, in the radial direction of the first permanent magnet
On separated time, the spacing between the radially outward edge of the first permanent magnet and the radially outward edge of rotor core is L1, in the second permanent magnetism
In the middle separated time of the radial direction of body, the spacing between the radially outward edge of the second permanent magnet and the radially outward edge of rotor core
Thickness for L2, the first permanent magnet is H1, wherein：
L1≥2L2；And L1 >=1.8*H1.
Preferably, the radially outward edge of the first permanent magnet is provided with the opening of the radially outward edge of perforation rotor core；Or,
The radially outward edge of first permanent magnet is provided with magnetic conduction bridge.
Preferably, it when the radially outward edge of the first permanent magnet is provided with opening, is open and has close to the side of the second permanent-magnet pole
There is bevelled edge.
Preferably, when the radially outward edge of the first permanent magnet is provided with opening, opening and the permanent magnet of the second permanent-magnet pole it
Between be provided with the groove being recessed inwardly from the outer radial periphery edge of rotor core.
Preferably, it is provided with the first permanent magnetism slot in the first permanent-magnet pole, the second permanent magnetism slot and are provided in the second permanent-magnet pole
Three permanent magnetism slots, the first permanent magnet are arranged in the first permanent magnetism slot, and the second permanent magnet is arranged in the second permanent magnetism slot, third permanent magnet
It is arranged in third permanent magnetism slot, the gap size between the first permanent magnet and the first permanent magnetism slot is D1, the second permanent magnet and second
Gap size between permanent magnetism slot is D2, and the gap size between third permanent magnet and third permanent magnetism slot is D3, wherein D2 >=
1.5D1, D3 >=1.5D1.
Preferably, D1 >=0.1mm.
According to another aspect of the present invention, a kind of magneto, including rotor are provided, which is above-mentioned
Rotor.
Preferably, magneto further includes motor stator, and air gap is formed between motor stator and rotor, when rotor iron
When being arranged fluted on core, the relationship between the width k and width of air gap δ of groove meets：
k≥1.2δ。
Rotor provided by the invention, including rotor core and the first permanent magnetism for being arranged alternately of circumferential direction along rotor core
Pole and the second permanent-magnet pole, the coercivity of the coercivity of the permanent magnet in the first permanent-magnet pole higher than the permanent magnet in the second permanent-magnet pole.
The rotor forms the first permanent-magnet pole and the second permanent-magnet pole being arranged alternately, different coercives using the different permanent magnet of coercivity
The permanent magnet of power can form cascaded structure in magnetic loop, in motor normal course of operation, can pass through the first permanent-magnet pole
On high-coercive force the second permanent-magnet pole of permanent magnet pair on low-coercivity permanent magnet formed protect magnetic action, improve whole magnetic
The equivalent coercivity in circuit can effectively reduce motor and magnetize electric current, improve motor demagnetization current, when ensureing motor normal operation
Magnetic loop stability, promoted electric efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of the rotor of first embodiment of the invention；
Fig. 2 is the structural schematic diagram of the rotor of second embodiment of the invention；
Fig. 3 is magnetic figure of the magneto of the embodiment of the present invention when the first magnetic shielding structure magnetizes；
Fig. 4 is magnetic figure of the magneto of the embodiment of the present invention when second of magnetic shielding structure magnetizes；
Fig. 5 is magnetic figure of the magneto of the embodiment of the present invention when the third magnetic shielding structure magnetizes；
Fig. 6 is magnetic figure of the magneto of the embodiment of the present invention when the 4th kind of magnetic shielding structure magnetizes；
Fig. 7 is magnetic figure of the magneto of the embodiment of the present invention when the 5th kind of magnetic shielding structure magnetizes；
Fig. 8 be the rotor of the embodiment of the present invention the second permanent magnet and third permanent magnet in different relative positions pair
Magnetize the influence schematic diagram of electric current.
Reference numeral is expressed as：
1, rotor core；2, the first permanent magnet；3, the second permanent magnet；4, third permanent magnet；5, the first permanent magnetism slot；6, second
Permanent magnetism slot；7, third permanent magnetism slot；8, magnetic conduction bridge；9, it is open；10, bevelled edge；11, groove；12, motor stator；13, air gap.
Specific implementation mode
In conjunction with referring to shown in Fig. 1 to 8, according to an embodiment of the invention, rotor includes rotor core 1 and along rotor iron
The first permanent-magnet pole and the second permanent-magnet pole that the circumferential direction of core 1 is arranged alternately, the coercivity of the permanent magnet in the first permanent-magnet pole is higher than the
The coercivity of permanent magnet in two permanent-magnet poles.
Above-mentioned permanent magnet is, for example, magnet steel.
At least two coercitive magnetic are respectively adopted in the permanent magnet on permanent magnet and the second permanent-magnet pole in first permanent-magnet pole
The steel trade mark, to form different coercitive permanent-magnet structures in two permanent-magnet poles, due to the coercitive permanent magnetism knot of two kinds of differences
Structure is located at different magnetic poles, therefore low-coercivity magnet steel is not readily susceptible to the influence of high-coercive force magnet steel, can effectively play
The magnetic characteristic of low-coercivity magnet steel, to improve motor performance.
The rotor is formed in first be circumferentially arranged alternately on rotor core 1 using the different permanent magnet of coercivity
Permanent-magnet pole and the second permanent-magnet pole, different coercitive permanent magnets can form cascaded structure in magnetic loop, normally be transported in motor
During row, the permanent magnetism of the low-coercivity in the second permanent-magnet pole of permanent magnet pair of the high-coercive force in the first permanent-magnet pole can be passed through
Body, which is formed, protects magnetic action, improves the equivalent coercivity of whole magnetic loop, can effectively reduce motor and magnetize electric current, improves motor
Demagnetization current ensures magnetic loop stability when motor normal operation, promotes electric efficiency.
Preferably, the first permanent-magnet pole includes the first permanent magnet 2, pole center of first permanent magnet 2 about the first permanent-magnet pole
Line is symmetrical.Thus, the structure positioned at the first permanent magnet of the pole center line both sides of the first permanent-magnet pole is identical, therefore can be with
Good magnetic structure is formed with the structure of the second permanent-magnet pole of the first permanent-magnet pole circumferential direction both sides, motor is further increased and normally transports
The magnetic stability in circuit when row.
First permanent magnet 2 can be in "-" type, V-type or W types, so as to be selected according to the magnet structure in the second permanent-magnet pole
Suitable arrangement is selected, can preferably be formed and be coordinated with the magnet structure in the second permanent-magnet pole, promote the workability of motor
Energy.
Second permanent-magnet pole includes the second permanent magnet 3, and the second permanent magnet 3 is symmetrical about the pole center line of the second permanent-magnet pole,
Can enable positioned at pole center line both sides the second permanent magnet 3 respectively with the first permanent-magnet pole shape of the second permanent-magnet pole both sides
At identical magnetic structure, ensures the harmony that motor entirety magnetic circuit is distributed in circumferential direction, improve the working performance of motor.
Second permanent-magnet pole further includes third permanent magnet 4, pole center line pair of the third permanent magnet 4 about the second permanent-magnet pole
Claim, the second permanent magnet 3 is located at the both ends of the circumferential direction of third permanent magnet 4.The coercive of second permanent magnet 3 and third permanent magnet 4
Power is below the coercivity of the first permanent magnet 2, therefore the second permanent magnet 3 and the mutual cooperation of third permanent magnet 4 are formed by permanent magnetism
Body combines, and coercivity still is below the coercivity of the first permanent magnet 2, and due to using two kinds of permanent magnetism in the second permanent-magnet pole
Body, therefore can so that more kinds of coercitive permanent-magnet structures of difference can be formed in the second permanent-magnet pole, it can be more easily
Cooperation is formed between the first permanent magnet 2, obtains good magnetic circuit effect, while can effectively promote the adjustable magnetic range of motor.
It is in W types to be preferably located at the second permanent magnet 3 of same permanent-magnet pole and third permanent magnet 4.Second permanent magnet 3 and
The thickness of three permanent magnet 4 is different and/or the trade mark is different.
In the present embodiment, meet between the first permanent magnet 2, the second permanent magnet 3 and third permanent magnet 4：
0.9H1≤H2；
Hcj3*Br3*H3≤3/4*Hcj1*Br1*H1；
0.8Hcj3≤Hcj2≤1.3Hcj3；
Wherein H1 is the thickness of the first permanent magnet 2, and H2 is the thickness of the second permanent magnet 3, and H3 is the thickness of third permanent magnet 4
Degree, Hcj1 are the coercivity of the first permanent magnet 2, and Br1 is the remanent magnetism of the first permanent magnet 2, and Hcj2 is the coercive of the second permanent magnet 3
Power, Br2 are the remanent magnetism of the second permanent magnet 3, and Hcj3 is the coercivity of third permanent magnet 4, and Br3 is the remanent magnetism of third permanent magnet 4.
Preferably, H2≤H3/2；Hcj2≤Hcj3.
In the present embodiment, the thickness of the second permanent magnet 3 and coercivity are respectively less than third permanent magnet 4.It is set using such
Meter, during being demagnetized, 4 thickness of third permanent magnet is thicker, and coercivity is higher, therefore its magnetic stable type is higher, will not
It is influenced by demagnetization is filled；In this way, only the second permanent magnet 3 continuous magnetized and is demagnetized during adjustable magnetic, and by
In 3 thinner thickness of the second permanent magnet, coercivity is relatively low, and the electric current that magnetizes required for magnetization process is small；Simultaneously because it is rectified with height
Stupid power magnet steel series connection, equivalent coercivity H j is also higher, therefore its demagnetization current is relatively high, and normal condition is less prone to demagnetization；
Wherein equivalent coercivity H j=(Hcj1*H1+Hcj2*H2)/(H1+H2)
And second the main function of permanent magnet 3 be for adjusting magnetic circuit useful flux range, only providing a small amount of main flux；
And magnetic stability is higher during 4 entire adjustable magnetic of third permanent magnet；Generally speaking it is magnetized in the whole process electricity using this structure
Stream is smaller, and required controller module cost is relatively low；Demagnetization current is larger, and main flux is stablized higher.
Since the second permanent magnet 3 is different with the thickness of third permanent magnet 4, each magnet steel arrangement of two low-coercivity magnetic pole
Relative position carries out special designing, and the radially height setting of thicker third permanent magnet 4 is higher or lower than the second permanent magnet 3
It can.
In conjunction with shown in Figure 8, in the present embodiment, radially height is higher than third permanent magnet 4 to the second permanent magnet 3
Height, the second permanent-magnet pole include the second permanent magnetism slot 6 and third permanent magnetism slot 7, the second permanent magnet 3 be arranged in the second permanent magnetism slot 6,
Third permanent magnet 4 is arranged in third permanent magnetism slot 7, and 3 part of the second permanent magnet is stretched into third permanent magnetism slot 7, and the second permanent magnet 3
It is H4 close to the maximum height of 3 side side wall of the second permanent magnet that the part of third permanent magnetism slot 7, which is stretched into, relative to third permanent magnetism slot 7,
Wherein H4/H2 < 0.3, H2 are the thickness of the second permanent magnet 3.
Preferably, the angle between the second permanent magnet 3 and third permanent magnet 4 is 30 ° of θ >.With the variation of ratio, magnetize
The amplitude that electric current reduces reduces, i.e., the range of decrease is smaller, and electric current is bigger, and there are one optimal proportional regions for entire size.Entire ratio
Change procedure is magnet steel 4 in movement, although the range of decrease is larger when more than 0.3 or more, equally also influences adjustable magnetic multiple in this way, because
This limits H4/H2 < 0.3 herein, while limiting 30 ° of θ >, can be matched with the ratio, further increase motor efficiency.
Second permanent magnet 3 and the first permanent magnet 2 form cascaded structure in magnetic loop, high-coercive force in normal course of operation
Magnet steel, which has low-coercivity magnet steel, protects magnetic action, improves the equivalent coercivity of whole magnetic loop, promotes motor demagnetization current,
Ensure circuit magnetic stability when normal operation.
It is provided with the first permanent magnetism slot 5 when first permanent magnet 2 is W types, in the first permanent-magnet pole, the is provided in the second permanent-magnet pole
Two permanent magnetism slots 6, the first permanent magnet 2 are arranged in the first permanent magnetism slot 5, and the second permanent magnet 3 is arranged in the second permanent magnetism slot 6, and first
Angle between permanent magnetism slot 5 and the second permanent magnetism slot 6 is 1≤30 ° of -5 °≤θ.When first permanent magnet 2 is W types, high coercive is increased
The dosage of power magnet steel, while the magnetic interpolar structures of the first permanent magnet 2 and the second permanent magnet 3 are defined, it can effectively be promoted
Electric efficiency.
Preferably, when the first permanent magnet 2 is W types, it is provided with the first permanent magnetism slot 5 in the first permanent-magnet pole, the first permanent magnet 2 is set
It sets in the first permanent magnetism slot 5, in the section of the central axis of rotor core 1, the outer edge of the first permanent magnetism slot 5 and
Minimum range between the outer edge of two permanent magnetism slots 6 is H, and the thickness of the first permanent magnet 2 is H1, and the second permanent magnetism slot 6 is close to first
Maximum distance between the side wall of permanent magnetism slot 5 and the first permanent-magnet pole and the interface of the second permanent-magnet pole is H5, wherein：
H≥2H1；
0.5*H1≤H5≤H1。
Magnetic circuit reluctance can be effectively reduced using the design, generally can effectively promote electric efficiency.Use this simultaneously
Design can be effectively increased interpolar magnetic conduction channel, and second permanent magnet 3 is to the short-circuit effect of entire magnetic circuit when increasing reversed, to increase
10% or more motor adjustable magnetic range is added.
In conjunction with shown in Figure 5, in the present embodiment, in the section of the central axis of rotor core 1,
In the middle separated time of the radial direction of one permanent magnet 2, the radially outward edge of the radially outward edge and rotor core 1 of the first permanent magnet 2
Between spacing be L1, in the middle separated time of the radial direction of the second permanent magnet 3, the radially outward edge of the second permanent magnet 3 with turn
Spacing between the radially outward edge of sub- iron core 1 is L2, and the thickness of the first permanent magnet 2 is H1, wherein：
L1≥2L2；And L1 >=1.8*H1.
Using the structure design, the cost performance of motor can be made optimal, under the premise of the electric current that magnetizes increases less, most
The demagnetization current of the reduction motor of limits.
In conjunction with shown in Figure 3, in the present embodiment, the radially outward edge of the first permanent magnet 2 is provided with magnetic conduction bridge 8.
In conjunction with shown in Figure 4, in the present embodiment, the radially outward edge of the first permanent magnet 2 is provided with perforation rotor iron
The opening 9 of the radially outward edge of core 1.
It, can be by changing the position of the magnetic conduction bridge 8 of the first permanent magnet 2 and right by using the structure of Fig. 3 and Fig. 4
The outer circle of first permanent magnet 2 carries out the mode of opening design, changes magnetic line of force trend by force, increases the first permanent magnet 2 to second
The magnetic assist ability of permanent magnet 3, to further decrease the size of current that magnetizes.
In conjunction with shown in Figure 6, it is preferable that when the radially outward edge of the first permanent magnet 2 is provided with opening 9, opening 9 is close
The side of second permanent-magnet pole has bevelled edge 10.By carrying out outer circle angle of chamfer design on the basis of Fig. 5, can further subtract
The small electric current that magnetizes, while demagnetization current variation is little, ensure that the working performance of motor.
Preferably, when the radially outward edge of the first permanent magnet 2 is provided with opening 9, the permanent magnet of opening 9 and the second permanent-magnet pole
Between be provided with the groove 11 being recessed inwardly from the outer radial periphery edge of rotor core 1.The groove 11 can change the first permanent-magnet pole
And the second magnetic circuit trend between permanent-magnet pole, therefore can also play the role of reducing the electric current that magnetizes.
It is provided with the first permanent magnetism slot 5 in first permanent-magnet pole, the second permanent magnetism slot 6 and third permanent magnetism are provided in the second permanent-magnet pole
Slot 7, the first permanent magnet 2 are arranged in the first permanent magnetism slot 5, and the second permanent magnet 3 is arranged in the second permanent magnetism slot 6, third permanent magnet 4
Be arranged in third permanent magnetism slot 7, gap size between the first permanent magnet 2 and the first permanent magnetism slot 5 is D1, the second permanent magnet 3 with
Gap size between second permanent magnetism slot 6 is D2, and the gap size between third permanent magnet 4 and third permanent magnetism slot 7 is D3, wherein
D2 >=1.5D1, D3 >=1.5D1.
Preferably, D1 >=0.1mm.Also as the part in magnetic circuit, gap is bigger in magnetic slot gap, and magnetic resistance is bigger；?
This mode can also be used under special construction to increase the anti-degaussing ability of low-coercivity magnet steel, ensure the magnetic of low-coercivity magnet steel
Property.
In conjunction with referring to shown in Fig. 3 to Fig. 7, according to an embodiment of the invention, magneto includes rotor, which turns
Son is above-mentioned rotor.
Preferably, magneto further includes motor stator 12, and air gap 13 is formed between motor stator 12 and rotor, when
When being arranged fluted 11 on rotor core 1, the relationship between the 13 width δ of width k and air gap of groove 11 meets：
k≥1.2δ。
The relationship between width and the width of rotor air gap 13 by limiting groove 11, can effectively reduce the electricity that magnetizes
Stream.
By using the said program of the present invention, by verification, when the adjustable magnetic range for ensureing motor promotes 10% or more,
The electric current that magnetizes of motor can be made to decline 15%, demagnetization current promotes 10%, therefore effectively improves the working performance of motor, drops
The normal condition of low motor and the load torque of demagnetized state are pulsed.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present invention
Protect range.
Claims (22)
1. a kind of rotor, which is characterized in that alternately arranged including rotor core (1) and along the circumferential of the rotor core (1)
The coercivity of the first permanent-magnet pole and the second permanent-magnet pole of cloth, the permanent magnet in first permanent-magnet pole is higher than second permanent-magnet pole
On permanent magnet coercivity.
2. rotor according to claim 1, which is characterized in that first permanent-magnet pole includes the first permanent magnet (2),
First permanent magnet (2) is symmetrical about the pole center line of first permanent-magnet pole.
3. rotor according to claim 2, which is characterized in that first permanent magnet (2) is in "-" type, V-type or W
Type.
4. rotor according to any one of claim 1 to 3, which is characterized in that second permanent-magnet pole includes the
Two permanent magnets (3), second permanent magnet (3) are symmetrical about the pole center line of second permanent-magnet pole.
5. rotor according to claim 4, which is characterized in that second permanent-magnet pole further includes third permanent magnet
(4), the third permanent magnet (4) is symmetrical about the pole center line of second permanent-magnet pole, and second permanent magnet (3) is located at
The both ends of the circumferential direction of the third permanent magnet (4).
6. rotor according to claim 5, which is characterized in that be located at second permanent magnet of same permanent-magnet pole
(3) and the third permanent magnet (4) is in W types.
7. rotor according to claim 5, which is characterized in that first permanent magnet (2), second permanent magnet
(3) meet between the third permanent magnet (4)：
0.9H1≤H2；
Hcj3*Br3*H3≤3/4*Hcj1*Br1*H1；
0.8Hcj3≤Hcj2≤1.3Hcj3；
Wherein H1 is the thickness of the first permanent magnet (2), and H2 is the thickness of the second permanent magnet (3), and H3 is the thickness of third permanent magnet (4)
Degree, Hcj1 are the coercivity of the first permanent magnet (2), and Br1 is the remanent magnetism of the first permanent magnet (2), and Hcj2 is the second permanent magnet (3)
Coercivity, Br2 are the remanent magnetism of the second permanent magnet (3), and Hcj3 is the coercivity of third permanent magnet (4), and Br3 is third permanent magnet
(4) remanent magnetism.
8. rotor according to claim 5, which is characterized in that the coercivity of the third permanent magnet (4) is more than institute
State the coercivity of the second permanent magnet (3).
9. rotor according to claim 8, which is characterized in that second permanent magnet (3) and the third permanent magnetism
The thickness of body (4) is different and/or the trade mark is different.
10. rotor according to claim 5, which is characterized in that second permanent magnet (3) and the third permanent magnetism
Angle between body (4) is 30 ° of θ >.
11. rotor according to claim 4, which is characterized in that second permanent magnet (3) and first permanent magnetism
Body (2) forms cascaded structure in magnetic loop.
12. rotor according to claim 4, which is characterized in that when first permanent magnet (2) is W types, described the
It is provided with the first permanent magnetism slot (5) in one permanent-magnet pole, the second permanent magnetism slot (6) is provided in second permanent-magnet pole, described first forever
In the first permanent magnetism slot (5), the second permanent magnet (3) setting is interior in the second permanent magnetism slot (6) for magnet (2) setting,
Angle between the first permanent magnetism slot (5) and the second permanent magnetism slot (6) is 1≤30 ° of -5 °≤θ.
13. rotor according to claim 5, which is characterized in that second permanent-magnet pole includes the second permanent magnetism slot (6)
With third permanent magnetism slot (7), the second permanent magnet (3) setting is in the second permanent magnetism slot (6), the third permanent magnet (4)
In the third permanent magnetism slot (7), second permanent magnet (3) is partly stretched into the third permanent magnetism slot (7), and described for setting
Second permanent magnet (3) stretch into the part of the third permanent magnetism slot (7) relative to the third permanent magnetism slot (7) close to described second forever
The maximum height of magnet (3) side side wall is H4, and wherein H4/H2 < 0.3, H2 are the thickness of the second permanent magnet (3).
14. rotor according to claim 4, which is characterized in that when first permanent magnet (2) is W types, described the
The first permanent magnetism slot (5) is provided in one permanent-magnet pole, the first permanent magnet (2) setting is being hung down in the first permanent magnetism slot (5)
Directly in the section of the central axis of the rotor core (1), outer edge and second permanent magnetism of the first permanent magnetism slot (5)
Minimum range between the outer edge of slot (6) is H, and the thickness of first permanent magnet (2) is H1, the second permanent magnetism slot (6)
Maximum between the side wall and first permanent-magnet pole and the interface of second permanent-magnet pole of the first permanent magnetism slot (5)
Distance is H5, wherein：
H≥2H1；
0.5*H1≤H5≤H1。
15. rotor according to claim 5, which is characterized in that in the central shaft perpendicular to the rotor core (1)
In the section of line, in the middle separated time of the radial direction of first permanent magnet (2), the diameter of first permanent magnet (2) is outside
Spacing between edge and the radially outward edge of the rotor core (1) is L1, in the radial direction of second permanent magnet (3)
Middle separated time on, between the radially outward edge and the radially outward edge of the rotor core (1) of second permanent magnet (3) between
It is H1 away from the thickness for L2, the first permanent magnet (2), wherein：
L1≥2L2；And L1 >=1.8*H1.
16. rotor according to claim 2, which is characterized in that the radially outward edge of first permanent magnet (2) is set
It is equipped with the opening (9) for the radially outward edge for penetrating through the rotor core (1)；Or, the radially outward edge of first permanent magnet (2)
It is provided with magnetic conduction bridge (8).
17. rotor according to claim 16, which is characterized in that the radially outward edge of first permanent magnet (2)
When being provided with opening (9), the opening (9) has bevelled edge (10) close to the side of second permanent-magnet pole.
18. rotor according to claim 16, which is characterized in that the radially outward edge of first permanent magnet (2)
When being provided with opening (9), it is provided with from the rotor core between opening (9) and the permanent magnet of second permanent-magnet pole
(1) groove (11) that outer radial periphery edge is recessed inwardly.
19. rotor according to claim 5, which is characterized in that be provided with the first permanent magnetism in first permanent-magnet pole
Slot (5) is provided with the second permanent magnetism slot (6) and third permanent magnetism slot (7) in second permanent-magnet pole, and first permanent magnet (2) sets
It sets in the first permanent magnetism slot (5), the second permanent magnet (3) setting is in the second permanent magnetism slot (6), and the third is forever
Magnet (4) setting in the third permanent magnetism slot (7), between first permanent magnet (2) and the first permanent magnetism slot (5) between
Gap size is D1, and the gap size between second permanent magnet (3) and the second permanent magnetism slot (6) is D2, and the third is forever
Gap size between magnet (4) and the third permanent magnetism slot (7) is D3, wherein D2 >=1.5D1, D3 >=1.5D1.
20. rotor according to claim 19, which is characterized in that D1 >=0.1mm.
21. a kind of magneto, including rotor, which is characterized in that the rotor is any in claim 1 to 20
Rotor described in.
22. magneto according to claim 21, which is characterized in that the magneto further includes motor stator
(12), the motor stator (12) forms air gap (13) between rotor, fluted when being arranged on the rotor core (1)
(11) when, the relationship between the width k and air gap (13) width δ of the groove (11) meets：
k≥1.2δ。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810904388.6A CN108777522B (en) | 2018-08-09 | 2018-08-09 | Motor rotor and permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810904388.6A CN108777522B (en) | 2018-08-09 | 2018-08-09 | Motor rotor and permanent magnet motor |
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| Publication Number | Publication Date |
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| CN108777522A true CN108777522A (en) | 2018-11-09 |
| CN108777522B CN108777522B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810904388.6A Active CN108777522B (en) | 2018-08-09 | 2018-08-09 | Motor rotor and permanent magnet motor |
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| Country | Link |
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| CN (1) | CN108777522B (en) |
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| CN109951039A (en) * | 2019-04-08 | 2019-06-28 | 哈尔滨工业大学 | Built-in reverse W type hybrid permanent magnet adjustable flux permanent magnet synchronous motor |
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| CN117767614A (en) * | 2023-12-26 | 2024-03-26 | 淮阴工学院 | Surface-mounted-built-in hybrid permanent magnet synchronous motor rotor structure |
| WO2025050818A1 (en) * | 2023-09-07 | 2025-03-13 | 广东美芝制冷设备有限公司 | Motor, compressor, and refrigeration device |
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| CN108777522B (en) | 2020-09-01 |
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