CN208890501U - Rotor, magneto and washing machine - Google Patents
Rotor, magneto and washing machine Download PDFInfo
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- CN208890501U CN208890501U CN201821886806.5U CN201821886806U CN208890501U CN 208890501 U CN208890501 U CN 208890501U CN 201821886806 U CN201821886806 U CN 201821886806U CN 208890501 U CN208890501 U CN 208890501U
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Abstract
The utility model provides a kind of rotor, magneto and washing machine.The rotor includes rotor core (1), the first permanent magnet (2) and the second permanent magnet (3) of annular, N1 the first permanent magnets (2) and N2 the second permanent magnets (3) are arranged alternately along the circumferential direction of rotor core (1), the coercivity of first permanent magnet (2) is greater than the coercivity of the second permanent magnet (3), the direction of magnetization that first permanent magnet (2) is is tangential, the direction of magnetization of second permanent magnet (3) is radial, N1 >=1, N2 >=1.Rotor according to the present utility model can significantly reduce magnetizing current when motor changes permanent magnet magnetization state.
Description
Technical field
The utility model belongs to technical field of motors, and in particular to a kind of rotor, magneto and washing machine.
Background technique
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 in the case where power supply voltage is fixed, limit
The maximum running frequency of motor.Currently, magneto can only control expansion range of operation by weak magnetic mostly, but weak magnetic controls
In the presence of increase copper olse, reduce electric efficiency, speed adjustable range is limited the problems such as.
In order to realize that Magnetic Field for Permanent Magnet Electrical Machines is adjustable, there is a kind of magneto for using two kinds of permanent magnets to be suggested.Motor
Generally comprise the different permanent magnet of several coercivitys.Wherein low-coercivity permanent magnet can be changed forever by applying magnetizing current
The magnetized state of magnet.When motor operation is when low speed, big torque conditions, motor needs high-intensity magnetic field, passes through magnetizing current at this time
Low-coercivity permanent magnet saturation is magnetized, keeps magnetic field strength in motor maximum.When motor operation in high speed, small torque when, at this time
The magnetization degree that low-coercivity permanent magnet is reduced by magnetizing current reduces magnetic field strength in motor.
However there are the following problems for the variable motor of existing permanent magnet magnetization state:
1, because there are High-coercivity Permanent Magnets on magnetized magnetic circuit, there is magnetization when changing permanent magnet magnetization state in motor
The big problem of electric current.
2, low-coercivity permanent magnet, which is in the torque pulsation for increasing magnetic or subtracting magnetic state, has a state torque pulsation big.Due to
The permanent magnet of magnetic poles is different, and it is constant that High-coercivity Permanent Magnets provide magnetic field, and low-coercivity permanent magnet has increasing magnetic, subtracts magnetic
Two states, so if the torque pulsation of one state of optimization, and the pulsation of another state torque is inevitable larger or two
The torque pulsation of state is all undesirable.
Utility model content
Therefore, the technical problem to be solved by the present invention is to provide a kind of rotor, magneto and washing machine,
Magnetizing current when motor changes permanent magnet magnetization state can significantly be reduced.
To solve the above-mentioned problems, the utility model provides a kind of rotor, forever including annular rotor core, first
Magnet and the second permanent magnet, N1 the first permanent magnets and N2 the second permanent magnets are arranged alternately along the circumferential direction of rotor core, and first
The coercivity of permanent magnet be greater than the second permanent magnet coercivity, the direction of magnetization of the first permanent magnet be it is tangential, the second permanent magnet
The direction of magnetization is radial, N1 >=1, N2 >=1.
Preferably, the magnetic circuit arranged in series of the first permanent magnet and the second adjacent permanent magnet.
Preferably, at least one second permanent magnet is provided between two adjacent the first permanent magnets.
Preferably, the second permanent magnet is located at the radially inner side of the first permanent magnet.
Preferably, the inner circumferential side of rotor core is provided with the convex block for protruding from the internal perisporium of rotor core, the second permanent magnet
It is embedded in convex block.
Preferably, the quantitative proportion of the first permanent magnet and the second permanent magnet is N1:N2=1:2.
Preferably, the size relationship between the first permanent magnet and the second permanent magnet meets:
0.6*L2 < L1 < 1.1*L2,0.5*H2 < H1 < 0.8*H2；
Wherein L1 is the width of the first permanent magnet, and H1 is the thickness of the first permanent magnet, and L2 is the width of the second permanent magnet, H2
For the thickness of the second permanent magnet.
Preferably, the radially inner side of the second permanent magnet has magnetic layer, the thickness of the thickness of magnetic layer and the second permanent magnet
Between relationship meet:
0.2*H2 < H3 < 0.6*H2；
Wherein H2 is the thickness of the second permanent magnet, and H3 is the thickness of magnetic layer.
Preferably, the radial outside of the first permanent magnet is provided with magnet isolation tank；And/or first the radially inner side of permanent magnet set
It is equipped with magnet isolation tank.
Preferably, the magnetic pole of rotor is all formed by the second permanent magnet, and magnetized state is identical.
Another aspect according to the present utility model provides a kind of magneto, including rotor and motor stator, should
Rotor is above-mentioned rotor, and the rotor core of rotor is set in outside motor stator.
It is according to the present utility model in another aspect, provide a kind of washing machine, including magneto, which is upper
The magneto stated.
Rotor provided by the utility model, rotor core, the first permanent magnet and the second permanent magnet including annular, the
One permanent magnet and the second permanent magnet are arranged alternately along the circumferential direction of rotor core, and the coercivity of the first permanent magnet is greater than the second permanent magnet
Coercivity, the direction of magnetization of the first permanent magnet be it is tangential, the direction of magnetization of the second permanent magnet is radial, N1 >=1, N2 >=1.It is logical
The direction of magnetization of setting the first permanent magnet and the second permanent magnet, and the first permanent magnet of reasonable Arrangement and the second permanent magnet are crossed, is being adjusted
When the magnetized state of the second relatively low permanent magnet of whole coercivity, it is opposite to be directly over coercivity for the magnetic field that armature winding generates
The second low permanent magnet avoids relatively high first permanent magnet of coercivity, the magnetization of second permanent magnet relatively low to coercivity
State is adjusted, to significantly reduce magnetizing current when motor changes permanent magnet magnetization state.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the magneto of the utility model embodiment；
Fig. 2 is the partial structural diagram of the magneto of the utility model embodiment；
Fig. 3 is the magnetization magnetic circuit figure of the magneto of the utility model embodiment；
Fig. 4 is the first permanent magnet of the magneto of the utility model embodiment and the dimensional structure figure of the second permanent magnet；
Fig. 5 is the structural schematic diagram of the rotor of the magneto of the utility model embodiment；
Fig. 6 is the strong magnetic state magnetic circuit figure of the magneto of the utility model embodiment；
Fig. 7 is the demagnetizing state magnetic circuit figure of the magneto of the utility model embodiment；
Fig. 8 is the demagnetizing state enlarged drawing of the magneto of the utility model embodiment.
Appended drawing reference indicates are as follows:
1, rotor core；2, the first permanent magnet；3, the second permanent magnet；4, convex block；5, magnetic layer；6, magnet isolation tank；7, motor
Stator.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to Fig. 8, embodiment according to the present utility model, rotor includes the rotor iron of annular
The week of core 1, the first permanent magnet 2 and the second permanent magnet 3, N1 the first permanent magnets 2 and N2 the second permanent magnets 3 along rotor core 1
To being arranged alternately, the coercivity of the first permanent magnet 2 is greater than the coercivity of the second permanent magnet 3, and the direction of magnetization of the first permanent magnet 2 is
Tangentially, the direction of magnetization of the second permanent magnet 3 is radial, N1 >=1, N2 >=1.Motor is by adjusting low-coercivity permanent magnet magnetization shape
State obtains optimal operating status in different operating conditions.N1 herein the first permanent magnets 2 and N2 the second permanent magnets 3 are along turning
The circumferential direction of sub- iron core 1 is arranged alternately, specially arrangement N2 after N1 the first permanent magnet 2 of the circumferential direction of rotor core 1
Second permanent magnet 3, N1 the first permanent magnets 2 of arranging followed by, N2 the second permanent magnets 3 of arranging followed by are so alternately arranged.
By setting the direction of magnetization of the first permanent magnet 2 and the second permanent magnet 3, and the first permanent magnet of reasonable Arrangement 2 and the
Two permanent magnets 3, when adjusting the magnetized state of the second relatively low permanent magnet 3 of coercivity, the magnetic field that armature winding generates, directly
By the second relatively low permanent magnet 3 of coercivity, relatively high first permanent magnet 2 of coercivity is avoided, it is relatively low to coercivity
The magnetized state of second permanent magnet 3 is adjusted, and since the magnetic resistance of the first permanent magnet 2 of high-coercive force is big, is avoiding rectifying
After stupid relatively high first permanent magnet 2 of power, it can significantly reduce magnetizing current when motor changes permanent magnet magnetization state.
Preferably, the magnetic circuit arranged in series of the first permanent magnet 2 and the second adjacent permanent magnet 3.Due to the of low-coercivity
The coercivity of two permanent magnets 3 is small, and magnetized state is easy to change, and the magnetic field that armature supply generates when may be operated normally is moved back
Magnetic is arranged the first permanent magnet 2 of concatenated high-coercive force, can increase anti-demagnetization capability to reduce uncontrollable demagnetization risk.
Before motor adjustable magnetic, the second permanent magnet 3 saturation of low-coercivity magnetizes, and motor is in strong magnetic state, at this time low coercive
The magnetic flux of second permanent magnet 3 of power is connected completely with the first permanent magnet 2 of high-coercive force, generates main flux, as shown in Figure 6；Electricity
After machine adjustable magnetic, the magnetization degree of the second permanent magnet 3 of low-coercivity weakens, and generates magnetic flux and reduces, and first with high-coercive force
Permanent magnet 2 is connected, and motor is in demagnetizing state at this time, and main flux reduces, and high-coercive force magnet steel residual flux passes through rotor yoke
Portion constitutes circuit, as shown in Figure 7.
Preferably, the magnetic pole of rotor is all formed by the second permanent magnet 3, and magnetized state is identical.In the prior art
In, since rotor pole a part is made of high-coercive force magnet steel, a part is made of low-coercivity magnet steel, due to magnetic steel material
The magnetized state of two kinds of magnet steel of reason must be different, therefore the torque that homopolarity does not generate must be variant, therefore motor is caused to turn
Square pulsation is larger.And in the present embodiment, rotor pole is all made of the second permanent magnet 3 of low-coercivity, the complete phase of magnetized state
Together, therefore output torque pulsation substantially reduces.
Preferably, at least one second permanent magnet 3 is provided between two adjacent the first permanent magnets 2.High-coercive force
First permanent magnet, 2 arranged for interval can make motor tune at least provided with second permanent magnet 3 between the first permanent magnet of every two 2
Magnetic circuit reduces adjustable magnetic difficulty without the first permanent magnet 2 of high-coercive force when magnetic magnetizes.
In the present embodiment, the quantitative proportion of the first permanent magnet 2 and the second permanent magnet 3 is N1:N2=1:2, in permission
Within the scope of magnetizing current, the magnetization degree of the second permanent magnet 3 of low-coercivity is higher, therefore has bigger permanent magnet to adjust model
It encloses.In the present embodiment, it is arranged alternately for first permanent magnet 2 and two the second permanent magnets 3 along the circumferential direction of rotor core 1,
Or first permanent magnet 2 and three the second permanent magnets 3 are arranged alternately or other along the circumferential direction of rotor core 1
Arrangement mode.
Motor permanent magnet is by the set of permanent magnets of two kinds of different materials at permanent magnet is all rectangular shape, and every a pair of pole is all wrapped
3 permanent magnets are included, including the first permanent magnet 2 of the second permanent magnet 3 and 1 high-coercive force of 2 low-coercivities.It is preferred that
Ground, the first permanent magnet 2 use Nd-Fe-B permanent magnet, and the second permanent magnet 3 uses Al-Ni-Co permanent magnet.
In the present embodiment, the second permanent magnet 3 is located at the radially inner side of the first permanent magnet 2, the of adjustment low-coercivity
When the magnetized state of two permanent magnets 3, it is more conducive to avoiding relatively high first permanent magnet 2 of coercivity, it is relatively low to coercivity
The magnetized state of the second permanent magnet 3 be adjusted.
The inner circumferential side of rotor core 1 is provided with the convex block 4 for protruding from the internal perisporium of rotor core 1, and the second permanent magnet 3 is embedded
In convex block 4.Second permanent magnet 3 of low-coercivity is distributed in the inside of rotor core 1 with the magnetic pole protrusion at place, makes motor Ld
It is roughly equal with Lq, guarantee that motor has higher performance under Id=0 control.
Size relationship between first permanent magnet 2 and the second permanent magnet 3 meets:
0.6*L2 < L1 < 1.1*L2,0.5*H2 < H1 < 0.8*H2；
Wherein L1 is the width of the first permanent magnet 2, and H1 is the thickness of the first permanent magnet 2, and L2 is the width of the second permanent magnet 3
Degree, H2 are the thickness of the second permanent magnet 3.
It, can be by the first permanent magnet 2 by the size relationship between reasonable set the first permanent magnet 2 and the second permanent magnet 3
Control avoids the too small effect for not having anti-demagnetization of the first permanent magnet 2, also avoids the first permanent magnet in reasonable size range
2 greatly have an impact motor adjustable magnetic very much, increase magnetization difficulty.
The radially inner side of second permanent magnet 3 has magnetic layer 5, between the thickness of magnetic layer 5 and the thickness of the second permanent magnet 3
Relationship meet:
0.2*H2 < H3 < 0.6*H2；
Wherein H2 is the thickness of the second permanent magnet 3, and H3 is the thickness of magnetic layer 5.
Second permanent magnet 3 of low-coercivity is embedded in rotor core 1, and the second permanent magnet 3 has one close to stator side guarantee
The magnetic layer 5 for determining thickness, when adjustable magnetic can be made to magnetize, the second permanent magnet 3 of low-coercivity being capable of uniform magnetization.
The radial outside of first permanent magnet 2 is provided with magnet isolation tank 6；And/or first the radially inner side of permanent magnet 2 be provided with
Magnet isolation tank 6.
Magnet isolation tank 6 is set by the radial outside of the first permanent magnet 2 in high-coercive force and inside, height can be effectively reduced
Coercivity permanent magnet brow leakage.Since magnetic circuit reluctance and magnetic path width and length have relationship, magnet isolation tank 6 can be passed through
The brow leakage that one section of long and narrow magnetic circuit reduces High-coercivity Permanent Magnets is arranged.
In conjunction with shown in Figure 1, embodiment according to the present utility model, magneto includes rotor and motor stator
7, which is above-mentioned rotor, and the rotor core 1 of rotor is set in outside motor stator 7.
Embodiment according to the present utility model, washing machine include magneto, which is above-mentioned magneto.
In washing and dewatering state, the magnetized state of the second permanent magnet 3 of low-coercivity changes magneto.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill of the art
For personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with modification.
Claims (12)
1. a kind of rotor, which is characterized in that rotor core (1), the first permanent magnet (2) and the second permanent magnet including annular
(3), N1 first permanent magnets (2) and N2 second permanent magnets (3) are alternately arranged along the circumferential of the rotor core (1)
Cloth, the coercivity of first permanent magnet (2) are greater than the coercivity of second permanent magnet (3), and first permanent magnet (2) is
The direction of magnetization be it is tangential, the direction of magnetization that second permanent magnet (3) is is radial, N1 >=1, N2 >=1.
2. rotor according to claim 1, which is characterized in that first permanent magnet (2) and adjacent described
The magnetic circuit arranged in series of two permanent magnets (3).
3. rotor according to claim 1, which is characterized in that between first permanent magnet (2) of adjacent two
It is provided at least one described second permanent magnet (3).
4. rotor according to claim 1, which is characterized in that second permanent magnet (3) is located at described first forever
The radially inner side of magnet (2).
5. rotor according to claim 1, which is characterized in that the inner circumferential side of the rotor core (1) is provided with convex
For the convex block (4) of the internal perisporium of the rotor core (1), second permanent magnet (3) is embedded in the convex block (4).
6. rotor according to claim 1, which is characterized in that first permanent magnet (2) and second permanent magnetism
The quantitative proportion of body (3) is N1:N2=1:2.
7. rotor according to claim 1, which is characterized in that first permanent magnet (2) and second permanent magnetism
Size relationship between body (3) meets:
0.6*L2 < L1 < 1.1*L2,0.5*H2 < H1 < 0.8*H2；
Wherein L1 is the width of the first permanent magnet (2), and H1 is the thickness of the first permanent magnet (2), and L2 is the width of the second permanent magnet (3)
Degree, H2 are the thickness of the second permanent magnet (3).
8. rotor according to claim 5, which is characterized in that the radially inner side of second permanent magnet (3) has
Magnetic layer (5), the relationship between the thickness of the magnetic layer (5) and the thickness of second permanent magnet (3) meet:
0.2*H2 < H3 < 0.6*H2；
Wherein H2 is the thickness of the second permanent magnet (3), and H3 is the thickness of magnetic layer (5).
9. rotor according to claim 1, which is characterized in that the radial outside of first permanent magnet (2) is arranged
There are magnet isolation tank (6)；And/or the radially inner side of first permanent magnet (2) is provided with magnet isolation tank (6).
10. rotor according to claim 1, which is characterized in that the magnetic pole of the rotor is all by described
Two permanent magnets (3) formation, and magnetized state is identical.
11. a kind of magneto, including rotor and motor stator (7), which is characterized in that the rotor is wanted for right
The rotor core (1) of rotor described in asking any one of 1 to 10, the rotor is set in the motor stator (7)
Outside.
12. a kind of washing machine, including magneto, which is characterized in that the magneto is permanent magnetism described in claim 11
Motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886806.5U CN208890501U (en) | 2018-11-15 | 2018-11-15 | Rotor, magneto and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886806.5U CN208890501U (en) | 2018-11-15 | 2018-11-15 | Rotor, magneto and washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208890501U true CN208890501U (en) | 2019-05-21 |
Family
ID=66518275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821886806.5U Active CN208890501U (en) | 2018-11-15 | 2018-11-15 | Rotor, magneto and washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208890501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193985A (en) * | 2018-11-15 | 2019-01-11 | 珠海格力电器股份有限公司 | Rotor, magneto and washing machine |
-
2018
- 2018-11-15 CN CN201821886806.5U patent/CN208890501U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193985A (en) * | 2018-11-15 | 2019-01-11 | 珠海格力电器股份有限公司 | Rotor, magneto and washing machine |
| WO2020098345A1 (en) * | 2018-11-15 | 2020-05-22 | 珠海格力电器股份有限公司 | Motor rotor, permanent magnet motor and washing machine |
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