CN209104916U - Motor rotor construction and magneto - Google Patents
Motor rotor construction and magneto Download PDFInfo
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- CN209104916U CN209104916U CN201821876424.4U CN201821876424U CN209104916U CN 209104916 U CN209104916 U CN 209104916U CN 201821876424 U CN201821876424 U CN 201821876424U CN 209104916 U CN209104916 U CN 209104916U
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Abstract
The utility model relates to technical field of motors, especially a kind of motor rotor construction and magneto.Motor rotor construction includes: rotor core, is along the circumferential direction equipped with multiple radial slots, is equipped with the first magnet isolation tank between two neighboring radial slot；The permanent magnet of different sizes there are two types of coercivity is respectively mounted in each radial slot, radial distribution of two kinds of coercivitys permanent magnet of different sizes along rotor core, and two kinds of coercivitys permanent magnet of different sizes is equipped with the second magnet isolation tank between the cutting orientation magnetizing of rotor core, the different permanent magnet of two kinds of coercivitys；When the direction of magnetization of two kinds of coercivitys permanent magnet of different sizes is opposite, rotor core is in more magnetic pole states, and when the direction of magnetization of two kinds of coercivitys permanent magnet of different sizes is identical, rotor core is in few magnetic pole state.The motor rotor construction can make rotor core be divided into more magnetic pole states and few magnetic pole state, increase motor high efficient district, expand motor operating range according to motor operation Operating condition adjustment internal magnetic field.
Description
Technical field
The utility model relates to technical field of motors, more particularly to a kind of motor rotor construction and magneto.
Background technique
Load state of the adjustable permanent magnet synchronous motor of magnetic flux according to motor, adjusts the power of motor internal magnetic field
Section.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 adjust,
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, motor is limited
Maximum running frequency.Currently, magneto can only control expansion range of operation by weak magnetic mostly, but weak magnetic control exists
Increase copper olse, reduce electric efficiency, the problems such as speed adjustable range is limited.
Utility model content
Based on this, it is necessary to when controlling expansion range of operation by weak magnetic for traditional magneto, existing motor
Copper loss increases, electric efficiency reduces, the problems such as speed adjustable range is limited, provides a kind of motor rotor construction and magneto.
A kind of motor rotor construction, comprising: rotor core, rotor core is along the circumferential direction equipped with multiple radial slots, adjacent
The first magnet isolation tank is equipped between two radial slots；
The permanent magnet of different sizes there are two types of coercivity is respectively mounted in each radial slot, two kinds of coercivitys are of different sizes forever
Magnet is along the radial distribution of rotor core, and two kinds of coercivitys permanent magnet of different sizes is along the cutting orientation magnetizing of rotor core,
The second magnet isolation tank is equipped between the different permanent magnet of two kinds of coercivitys；
When the direction of magnetization of two kinds of coercivitys permanent magnet of different sizes is opposite, rotor core is in more magnetic pole states, and two
When the direction of magnetization of kind coercivity permanent magnet of different sizes is identical, rotor core is in few magnetic pole state.
Two kinds of coercivity permanent magnets of different sizes are respectively relatively low of coercivity in one of the embodiments,
One permanent magnet and relatively high the second permanent magnet of coercivity, the first permanent magnet are set to the one of the close rotor outer circle of radial slot
Side, the second permanent magnet are set to the side of the close rotor inner circle of radial slot.
When rotor core is in few magnetic pole state in one of the embodiments, the number of magnetic poles of rotor core is n, rotor
When iron core is in more magnetic pole states, the number of magnetic poles of rotor core is 2n.
In one of the embodiments, two kinds of different permanent magnets of coercivity be respectively coercivity it is relatively low first forever
Magnet and relatively high the second permanent magnet of coercivity, the coercivity of the first permanent magnet are H1, with a thickness of d1, the second permanent magnet
Coercivity is H2, with a thickness of d2, then has d2*H2/H1*0.9 < d1 < d2*H2/H1*1.1.
In one of the embodiments, two kinds of different permanent magnets of coercivity be respectively coercivity it is relatively low first forever
Magnet and relatively high the second permanent magnet of coercivity, the remanent magnetism of the first permanent magnet are Br1, width L1, the second permanent magnet
Remanent magnetism is Br2, width L2, then has L2*Br2/Br1*0.9 < L1 < L2*Br2/Br1*1.1.
The both ends in the width direction of the second magnet isolation tank are close to rotor outer circle in one of the embodiments,.
Motor rotor construction further includes third magnet isolation tank in one of the embodiments, and it is close to be set to the second magnet isolation tank
Two ends of rotor outer circle, the width direction of third magnet isolation tank are parallel to the tangential of rotor core.
The thickness range of third magnet isolation tank is 2g~5g in one of the embodiments, and wherein g is motor gas-gap.
Radial slot is close to the side of rotor outer circle with a thickness of d, the width of third magnet isolation tank in one of the embodiments,
For L3, then 0.8*d < L3 < 1.2*d.
The thickness range of the second magnet isolation tank is 2g~5g in one of the embodiments, and wherein g is motor gas-gap.
The second magnet isolation tank is close to the center of the end of rotor outer circle and radial slot close to rotor in one of the embodiments,
The central angle that the center of the end of outer circle is constituted is α, and wherein 0.9* π/n < α < 1.1* π/n, n is to turn under few magnetic pole state
The number of magnetic poles of sub- iron core.
The first magnet isolation tank is along the radial both ends of rotor core respectively close to the inner circle of rotor in one of the embodiments,
With the outer circle of rotor, and the first magnet isolation tank close to one end of rotor inner circle thickness be greater than the other end thickness.
Motor rotor construction further includes the 4th magnet isolation tank in one of the embodiments, and it is close to be set to the first magnet isolation tank
The width direction of the end of rotor outer circle, the 4th magnet isolation tank is parallel to the tangential of rotor core.
A kind of magneto, including stator core and motor rotor construction, motor rotor construction are any of the above-described scheme institute
The motor rotor construction stated.
The beneficial effects of the utility model include:
By two kinds of coercivitys of setting permanent magnet of different sizes, and using the second magnet isolation tank by two kinds of coercivity sizes not
Same permanent magnet separates, and realizing rotor internal magnetic field can be adjusted as needed.When motor operation turns greatly in low speed
When square operating condition, motor changes the direction of magnetization for the permanent magnet that coercivity is relatively low in rotor core by armature supply, makes to turn
Sub- iron core is more magnetic pole states, and motor pole number is more at this time, and the torque of generation is larger.When motor operation is in the small torque operating condition of high speed
When, motor changes the direction of magnetization for the permanent magnet that coercivity is relatively low in rotor core by armature supply, makes rotor core
It is adjusted to few magnetic pole state, motor pole number reduces, and the torque of generation is smaller, but revolving speed increases under identical electric frequency.To
The motor rotor construction can make rotor core be divided into more magnetic pole states and lack according to motor operation Operating condition adjustment internal magnetic field
Magnetic pole state increases motor high efficient district, expands motor operating range.By the second magnet isolation tank, magnetization can be reduced or even eliminated
When the relatively high permanent magnet of the coercivity permanent magnet relatively low to coercivity influence, reduce armature winding change coercivity
The difficulty in relatively low permanent magnet magnetization direction reduces magnetizing current.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the motor rotor construction that an embodiment of the present invention provides；
Fig. 2 is the partial enlarged view in structure shown in Fig. 1 at A；
Fig. 3 is the structural schematic diagram for the motor rotor construction that another embodiment of the utility model provides；
Fig. 4 is the partial enlarged view in structure shown in Fig. 3 at B；
Fig. 5 is the magnetic circuit figure when rotor core of structure shown in Fig. 1 is in magnetic pole state less；
Fig. 6 is in magnetic circuit figure when more magnetic pole states for the rotor core of structure shown in Fig. 1.
Description of symbols:
10- motor rotor construction；
100- rotor core；
110- radial slot；The first magnet isolation tank of 120-；The second magnet isolation tank of 130-；
140- third magnet isolation tank；The 4th magnet isolation tank of 150-；
The first permanent magnet of 200-；
The second permanent magnet of 300-.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, by the following examples, it and ties
Attached drawing is closed, the motor rotor construction and magneto of the utility model are further elaborated.It should be appreciated that this place
The specific embodiment of description only to explain the utility model, is not used to limit the utility model.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.Term as used herein "vertical", "horizontal", "left" and "right" and similar statement are
For illustrative purposes.
Motor rotor construction 10 shown in Figure 1, that an embodiment of the present invention provides, comprising: rotor core
100, rotor core 100 is along the circumferential direction equipped with multiple radial slots 110, and first is equipped between two neighboring radial slot 110 every magnetic
Slot 120.The permanent magnet of different sizes there are two types of coercivity is respectively mounted in each radial slot 110, two kinds of coercivitys are of different sizes
Radial distribution of the permanent magnet along rotor core 100, and permanent magnet the cutting along rotor core 100 that two kinds of coercivitys are of different sizes
To magnetizing, the second magnet isolation tank 130 is equipped between the different permanent magnet of two kinds of coercivitys.Two kinds of coercivitys permanent magnet of different sizes
The direction of magnetization it is opposite when, rotor core 100 is in more magnetic pole states, the magnetization side of two kinds of coercivitys permanent magnet of different sizes
To it is identical when, rotor core 100 is in few magnetic pole state.
It is appreciated that the permanent magnet that two kinds of coercivitys are of different sizes, refers to that one of is that coercivity is relatively low
Permanent magnet (the first permanent magnet 200 i.e. as shown in Figure 1), another kind are the relatively high permanent magnet of coercivity (i.e. as shown in Figure 1 the
Two permanent magnets 300).When the direction of magnetization of the relatively low permanent magnet of coercivity changes as a result, coercivity is relatively high
Permanent magnet does not change.Thus, it is possible to change the number of magnetic poles of rotor core 100, to be adapted to the operating status of motor, improve
Electric efficiency.And rotor core 100 is in more magnetic pole states, refers to the number of magnetic poles of rotor core 100 relative to few magnetic pole shape
The more state of the number of magnetic poles of rotor core 100 when state.Corresponding more magnetic pole states of rotor core 100 are also motor pole
The more state of number.Rotor core 100 is in few magnetic pole state, refers to the number of magnetic poles of rotor core 100 relative to more magnetic poles
The less state of the number of magnetic poles of rotor core 100 when state.Corresponding few magnetic pole state of rotor core 100 is also motor magnetic
The less state of number of poles.First magnet isolation tank 120 be used for by magnetic field caused by the permanent magnet in two neighboring radial slot 110 every
It opens, avoids that magnetic flux leakage occurs.Second magnet isolation tank 130 is used for two kinds of coercivitys in each radial slot 110 are of different sizes
Magnetic field caused by permanent magnet separates, and the relatively high permanent magnet of coercivity is opposite to coercivity when reducing or even eliminating magnetization
The influence of lower permanent magnet reduces the difficulty that armature winding changes the relatively low permanent magnet magnetization direction of coercivity, reduces magnetic
Galvanic current.
By two kinds of coercivitys of setting permanent magnet of different sizes, and utilize the second magnet isolation tank 130 that two kinds of coercivitys are big
Small different permanent magnet separates, and realizing rotor internal magnetic field can be adjusted as needed.When motor operation is in low speed
When big torque operating condition, motor changes the magnetization side for the permanent magnet that coercivity is relatively low in rotor core 100 by armature supply
To making more than the 100 magnetic pole states of rotor core, motor pole number is more at this time, and the torque of generation is larger.When motor operation is in high speed
When small torque operating condition, motor changes the magnetization side for the permanent magnet that coercivity is relatively low in rotor core 100 by armature supply
To making rotor core 100 be adjusted to few magnetic pole state, motor pole number reduces, and the torque of generation is smaller, but identical electricity frequency
Revolving speed increases under rate.To the motor rotor construction 10, rotor core can be made according to motor operation Operating condition adjustment internal magnetic field
100 points are more magnetic pole states and few magnetic pole state, increase motor high efficient district, expand motor operating range.
Referring to Fig. 1, as a kind of enforceable mode, the both ends in the width direction of the second magnet isolation tank 130 are close to turn
Sub- outer circle.By the way that the both ends of the second magnet isolation tank 130 are extended to rotor outer circle side, leakage field can be effectively reduced.In a reality
It applies in example, the thickness range of the second magnet isolation tank 130 is 2g~5g, and wherein g is motor gas-gap.Referring to fig. 2, the second magnet isolation tank 130
Thickness shown with d3, i.e. 2g < d3 < 5g.By the thickness for rationally designing the second magnet isolation tank 130, it is ensured that the second magnet isolation tank
130 effectively every magnetic.
Referring to Fig. 1 and Fig. 2, in one embodiment, center and diameter of second magnet isolation tank 130 close to the end of rotor outer circle
To slot 110 close to the end of rotor outer circle center constitute central angle be α, wherein 0.9* π/n < α < 1.1* π/n, n is few
The number of magnetic poles of rotor core 100 under magnetic pole state.By being designed in this way, it is ensured that the rotor core 100 under few magnetic pole state
Every pole pole embrace is consistent.
Referring to Fig. 3, in one embodiment, motor rotor construction 10 further includes third magnet isolation tank 140, be set to second every
Magnetic slot 130 is close to two ends of rotor outer circle.The width direction of third magnet isolation tank 140 is parallel to the tangential of rotor core 100.
By the way that third magnet isolation tank 140 is arranged, it is ensured that every pole pole embrace of rotor core 100 is consistent.
Wherein, some constraints can be carried out to the size of third magnet isolation tank 140.It is appreciated that the length of third magnet isolation tank 140
Spending direction is the axial direction along rotor core 100.The axial length phase of the length of third magnet isolation tank 140 and rotor core 100
Close, the axial length of general rotor core 100 have how long, third magnet isolation tank 140 just have how long.It is above-mentioned to third magnet isolation tank
The constraint of 140 sizes mainly constrains its width and thickness.Referring to fig. 4, in one embodiment, the thickness of third magnet isolation tank 140
Degree may range from 2g~5g, and wherein g is motor gas-gap.As shown in figure 4, the thickness of third magnet isolation tank 140 is shown with d4, i.e. 2g
< d4 < 5g.Assuming that the width of third magnet isolation tank 140 be L3, radial slot 110 close to the side of rotor outer circle with a thickness of d, then
There is 0.8*d < L3 < 1.2*d.By designing 140 Sizes of third magnet isolation tank, it can guarantee the structure of rotor core 100
Rationally, guarantee the stable operation of motor.
It should be noted that radial slot 110 is compatible with permanent magnet mounted therein.The thickness of radial slot 110
It can be indicated with the thickness of permanent magnet.As shown in figure 3, the permanent magnet close to rotor outer circle side is relatively low the of coercivity
One permanent magnet 200, under the premise of the first permanent magnet 200 is in homogeneous thickness, above-mentioned radial slot 110 is close to the side of rotor outer circle
Thickness d is equal to the thickness (size as shown in d1 in Fig. 2) of first permanent magnet 200.It is understood that, it is assumed that outside rotor
The permanent magnet of circle side is the second relatively high permanent magnet 300 of coercivity, in the premise in homogeneous thickness of the second permanent magnet 300
Under, the thickness d of side of the above-mentioned radial slot 110 close to rotor outer circle is equal to the thickness of second permanent magnet 300 (in such as Fig. 2
Size shown in d2).
Referring to Fig. 1, as a kind of enforceable mode, the first magnet isolation tank 120 is along the radial both ends point of rotor core 100
Not close to the outer circle of the inner circle of rotor and rotor, and thickness of first magnet isolation tank 120 close to one end of rotor inner circle be greater than it is another
The thickness at end.By being designed in this way, it is ensured that the first magnet isolation tank 120 is effectively every magnetic.
Referring to Fig. 3, in one embodiment, motor rotor construction 10 further includes the 4th magnet isolation tank 150.4th magnet isolation tank
150 are set to the first magnet isolation tank 120 close to the end of rotor outer circle, and the width direction of the 4th magnet isolation tank 150 is parallel to rotor iron
Core 100 it is tangential.By the way that the 4th magnet isolation tank 150 is arranged, it is ensured that every pole pole embrace of rotor core 100 is consistent.
Wherein, some constraints can be carried out to the size of the 4th magnet isolation tank 150.Referring to the ruler of above-mentioned third magnet isolation tank 140
Very little explanation, the thickness range of the 4th magnet isolation tank 150 can be 2g~5g, and wherein g is motor gas-gap.Assuming that the 4th magnet isolation tank
150 width is L4, and radial slot 110 with a thickness of d, then has 0.8*d < L4 < 1.2*d close to the side of rotor outer circle.Pass through
4th magnet isolation tank, 150 Sizes are designed, can guarantee the structurally reasonable of rotor core 100, guarantee the stable operation of motor.
Deployment scenarios of two kinds of coercivitys permanent magnet of different sizes in radial slot 110 can be a variety of.Referring to Fig. 1,
As a kind of enforceable mode, two kinds of coercivity permanent magnets of different sizes are respectively the first relatively low permanent magnetism of coercivity
Body 200 and relatively high the second permanent magnet 300 of coercivity, the first permanent magnet 200 are set to the close rotor of radial slot 110
The side of outer circle, the second permanent magnet 300 are set to the side of the close rotor inner circle of radial slot 110.In the present embodiment, it is located at
The first permanent magnet 200 and the second permanent magnet 300 in same radial slot 110 only have one group respectively.One group of first permanent magnet
200 can be the permanent magnet of a monolith, be also possible to be made of muti-piece permanent magnet along the axial distribution of rotor core 100.This one
The second permanent magnet 300 of group is also possible to the permanent magnet of a monolith, or can be by muti-piece permanent magnet along rotor core 100
Axial distribution is constituted.One group of first permanent magnet 200 is set to the side of the close rotor outer circle of radial slot 110, and this group
Two permanent magnets 300 are set to the side of the close rotor inner circle of radial slot 110.By the way that the relatively low permanent magnet of coercivity is set
It is disposed adjacent to rotor outer circle side, can effectively reduce the magnetization difficulty of the permanent magnet relatively low to coercivity, is turned convenient for changing
The number of magnetic poles of sub- iron core 100.
In other embodiments, it is also possible to one group of first above-mentioned permanent magnet 200 being set to leaning on for radial slot 110
One group of second above-mentioned permanent magnet 300, is set to the one of the close rotor outer circle of radial slot 110 by the side of nearly rotor inner circle
Side.Or first permanent magnet 200 group number and the group number of the second permanent magnet 300 can not be only one group.For example, being located at
The first permanent magnet 200 in same radial slot 110 is two groups, and the second permanent magnet 300 is one group.Two group of first 200 He of permanent magnet
One group of second permanent magnet 300 is arranged in radial slot 110 along the radially alternating of rotor core 100.In this way, two group of first permanent magnet
200 can form two pairs of magnetic poles, and one group of second permanent magnet 300 can form a pair of of magnetic pole.It is located at same radial slot 110 compared to above-mentioned
In the first permanent magnet 200 and the second permanent magnet 300 respectively only have one group structure number of magnetic poles it is more, can in rotor core 100
It is more for the number of magnetic poles of variation.
Referring to figs. 5 and 6, Fig. 5 shows the magnetic circuit schematic diagram that rotor core 100 is in few magnetic pole state, rotor in Fig. 5
N, S of outer inner round side show the magnetic pole distribution map of each permanent magnet, and N, S in Fig. 5 on the outside of rotor outer circle show few magnetic pole
The magnetic pole of rotor core 100 under state is distributed.
Fig. 6 shows the magnetic circuit schematic diagram that rotor core 100 is in more magnetic pole states.N, S in Fig. 6 on the inside of rotor outer circle
The magnetic pole distribution map of each permanent magnet is shown, N, S in Fig. 6 on the outside of rotor outer circle show the rotor iron under more magnetic pole states
The magnetic pole of core 100 is distributed.
Referring to figs. 5 and 6, as a kind of enforceable mode, when rotor core 100 is in few magnetic pole state, rotor iron
The number of magnetic poles of core 100 is n, and when rotor core 100 is in more magnetic pole states, the number of magnetic poles of rotor core 100 is 2n.Rotor core
Two kinds of coercivitys having in 100 permanent magnet of different sizes, the magnetic of two kinds of each self-formings of coercivity permanent magnet of different sizes
Number of poles is equal.In other words, as in rotor core 100, the group number of the second relatively high permanent magnet 300 of coercivity
It is identical as the relatively low group number of the first permanent magnet 200 of coercivity, i.e. the number of magnetic poles and the first permanent magnetism of the second permanent magnet 300
The number of magnetic poles of body 200 is identical.Referring to Fig. 5, when the direction of magnetization of two kinds of coercivitys permanent magnet of different sizes is identical, rotor iron
Core 100 is in few magnetic pole state, and the number of magnetic poles of rotor core 100 is n.Referring to Fig. 6, when two kinds of coercivitys permanent magnetism of different sizes
When the direction of magnetization of body is opposite, rotor core 100 is in few magnetic pole state, and the number of magnetic poles of rotor core 100 is 2n.So set
Meter, so that the structure of rotor core 100 more simplifies, convenient for the arrangement of permanent magnet.
Referring to fig. 2, as a kind of enforceable mode, two kinds of different permanent magnets of coercivity be respectively coercivity relatively
The first low permanent magnet 200 and relatively high the second permanent magnet 300 of coercivity, the coercivity of the first permanent magnet 200 are H1,
With a thickness of d1, the coercivity of the second permanent magnet 300 then has d2*H2/H1*0.9 < d1 < d2*H2/H1* for H2 with a thickness of d2
1.1.If 200 thickness of the first permanent magnet is too small, the anti-demagnetization capability of the first permanent magnet 200 can be made insufficient, when causing motor operation
Uncontrollable demagnetization problem.And 200 thickness of the first permanent magnet is excessive, then will increase magnetization difficulty when adjustable magnetic, increases magnetizing current,
Keep motor adjustable magnetic difficult.It is designed in this way by the thickness to the first permanent magnet 200, it is ensured that two kinds of coercivitys are not
The anti-demagnetization capability of same permanent magnet is essentially identical, and it is tired to avoid uncontrollable demagnetization problem or motor adjustable magnetic when motor operation
Difficult problem.
Referring to fig. 2, as a kind of enforceable mode, two kinds of different permanent magnets of coercivity be respectively coercivity relatively
The first low permanent magnet 200 and relatively high the second permanent magnet 300 of coercivity, the remanent magnetism of the first permanent magnet 200 is Br1, wide
Degree is L1, and the remanent magnetism of the second permanent magnet 300 is Br2, width L2, then has L2*Br2/Br1*0.9 < L1 < L2*Br2/Br1*
1.1.By being designed in this way, it is ensured that the magnetic flux of the different permanent magnet of two kinds of coercivitys is essentially identical, guarantees motor torque
It pulses not too big.
An embodiment of the present invention additionally provides a kind of magneto, including stator core and motor rotor construction, electricity
Motor rotor structure is motor rotor construction 10 described in any of the above-described scheme.Since electronics rotor structure 10 is with above-mentioned beneficial
Effect, it is relatively low to coercivity on rotor core 100 using armature supply when magneto operating status changes
The direction of magnetization of permanent magnet be changed, realize that rotor number of magnetic poles is adjusted, achieve the purpose that increase speed adjustable range.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (14)
1. a kind of motor rotor construction characterized by comprising rotor core (100), the rotor core (100) is circumferentially
Direction is equipped with multiple radial slots (110), is equipped with the first magnet isolation tank (120) between the two neighboring radial slot (110)；
The permanent magnet of different sizes there are two types of coercivity is respectively mounted in each radial slot (110), described two coercivitys are big
Radial distribution of the small different permanent magnet along the rotor core (100), and the permanent magnet that described two coercivitys are of different sizes
The second magnet isolation tank is equipped between the cutting orientation magnetizing of the rotor core (100), the different permanent magnet of described two coercivitys
(130)；
When the direction of magnetization of described two coercivitys permanent magnet of different sizes is opposite, the rotor core (100) is in more magnetic
When the direction of magnetization of pole state, described two coercivitys permanent magnet of different sizes is identical, the rotor core (100) is in few
Magnetic pole state.
2. motor rotor construction according to claim 1, which is characterized in that described two coercivitys permanent magnetism of different sizes
Body is respectively relatively low the first permanent magnet (200) of coercivity and relatively high the second permanent magnet (300) of coercivity, described
First permanent magnet (200) is set to the side of the close rotor outer circle of the radial slot (110), second permanent magnet (300)
It is set to the side of the close rotor inner circle of the radial slot (110).
3. motor rotor construction according to claim 1, which is characterized in that the rotor core (100) is in few magnetic pole
When state, the number of magnetic poles of the rotor core (100) is n, when the rotor core (100) is in more magnetic pole states, described turn
The number of magnetic poles of sub- iron core (100) is 2n.
4. motor rotor construction according to claim 1, which is characterized in that the different permanent magnet of described two coercivitys point
Not Wei relatively low the first permanent magnet (200) of coercivity and relatively high the second permanent magnet (300) of coercivity, described first
The coercivity of permanent magnet (200) is H1, and with a thickness of d1, the coercivity of second permanent magnet (300) is H2, with a thickness of d2, then
There is d2*H2/H1*0.9 < d1 < d2*H2/Hl*1.1.
5. motor rotor construction according to claim 1, which is characterized in that the different permanent magnet of described two coercivitys point
Not Wei relatively low the first permanent magnet (200) of coercivity and relatively high the second permanent magnet (300) of coercivity, described first
The remanent magnetism of permanent magnet (200) is Br1, and the remanent magnetism of width L1, second permanent magnet (300) are Br2, and width L2 then has
L2*Br2/Br1*0.9 < L1 < L2*Br2/Br1*1.1.
6. motor rotor construction according to claim 1, which is characterized in that second magnet isolation tank (130) along width
The both ends in direction are close to rotor outer circle.
7. motor rotor construction according to claim 6, which is characterized in that further include third magnet isolation tank (140), be set to
Second magnet isolation tank (130) is parallel to close to two ends of rotor outer circle, the width direction of the third magnet isolation tank (140)
The rotor core (100) it is tangential.
8. motor rotor construction according to claim 7, which is characterized in that the thickness model of the third magnet isolation tank (140)
It encloses for 2g~5g, wherein g is motor gas-gap.
9. motor rotor construction according to claim 7, which is characterized in that the radial slot (110) is close to rotor outer circle
Side with a thickness of d, the width of the third magnet isolation tank (140) is L3, then 0.8*d < L3 < 1.2*d.
10. motor rotor construction according to claim 1, which is characterized in that the thickness model of second magnet isolation tank (130)
It encloses for 2g~5g, wherein g is motor gas-gap.
11. motor rotor construction according to claim 1, which is characterized in that second magnet isolation tank (130) is close to rotor
The central angle that the center of the center of the end of outer circle and the end of the radial slot (110) close rotor outer circle is constituted is α, wherein
0.9* π/n < α < 1.1* π/n, n are the number of magnetic poles of the rotor core (100) under few magnetic pole state.
12. motor rotor construction according to claim 1, which is characterized in that first magnet isolation tank (120) is along described turn
The radial both ends of sub- iron core (100) are respectively close to the inner circle of rotor and the outer circle of rotor, and first magnet isolation tank (120) leans on
The thickness of one end of nearly rotor inner circle is greater than the thickness of the other end.
13. motor rotor construction according to claim 12, which is characterized in that it further include the 4th magnet isolation tank (150), setting
In first magnet isolation tank (120) close to the end of rotor outer circle, the width direction of the 4th magnet isolation tank (150) is parallel to institute
State the tangential of rotor core (100).
14. a kind of magneto, which is characterized in that including stator core and motor rotor construction, the motor rotor construction is
The described in any item motor rotor constructions of claim 1-13 (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821876424.4U CN209104916U (en) | 2018-11-14 | 2018-11-14 | Motor rotor construction and magneto |
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| CN201821876424.4U CN209104916U (en) | 2018-11-14 | 2018-11-14 | Motor rotor construction and magneto |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347229A (en) * | 2018-11-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Motor rotor construction and magneto |
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2018
- 2018-11-14 CN CN201821876424.4U patent/CN209104916U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347229A (en) * | 2018-11-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Motor rotor construction and magneto |
| WO2020098339A1 (en) * | 2018-11-14 | 2020-05-22 | 珠海格力电器股份有限公司 | Motor rotor structure and permanent magnet motor |
| US11336135B2 (en) | 2018-11-14 | 2022-05-17 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor structure and permanent magnet motor |
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