CN105871098A - Low-fluctuation asymmetric type permanent magnetic rotor for electric vehicle motor - Google Patents
Low-fluctuation asymmetric type permanent magnetic rotor for electric vehicle motor Download PDFInfo
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- CN105871098A CN105871098A CN201610394854.1A CN201610394854A CN105871098A CN 105871098 A CN105871098 A CN 105871098A CN 201610394854 A CN201610394854 A CN 201610394854A CN 105871098 A CN105871098 A CN 105871098A
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- permanent magnetism
- rotor
- magnetism groove
- word pattern
- groove
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—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]
Abstract
The invention relates to the technical field of motors, in particular to a low-fluctuation asymmetric type permanent magnetic rotor for an electric vehicle motor. The low-fluctuation asymmetric type permanent magnetic rotor solves the technical problem of difficulty in reducing motor moment fluctuation. A plurality of slotted permanent magnetic grooves are formed in the rotor, wherein a piece of slotted magnetic steel is embedded into each slotted permanent magnetic groove, the slotted permanent magnetic grooves are divided into a type A and a type B, the type A permanent magnetic grooves and the type B permanent magnetic grooves are alternatively distributed in the circumferential direction of the rotor, the radial inserting depths of the A type permanent magnetic grooves are the same, the radial inserting depths of the B type permanent magnetic grooves are the same, the radial inserting depths of the A type permanent magnetic grooves are larger than the radial inserting depths of the B type permanent magnetic grooves, and the radial inserting depths of the slotted permanent magnetic grooves are the minimum distance between the slotted permanent magnetic grooves and the axis of the rotor. The rotor is especially suitable for an electric vehicle.
Description
Technical field
The present invention relates to motor technology, the low fluctuation asymmetric permanent magnetism particularly relating to a kind of motor in electric automobile turns
The technology of son.
Background technology
Electric automobile is to solve energy crisis and the important channel of environmental pollution.Driving motor for electric automobile governs
The research and development of Electric Cars in China and industrialization process thereof.Especially it is being applicable to the high-effect built-in type permanent-magnet of electric automobile
Synchronous motor aspect, also exists power density low, and high speed constant power bracket is narrow, torque fluctuations is big, overload capacity is low
With defects such as poor reliability, it is difficult to meet requirement.Driving motor for electric automobile governs grinding of Electric Cars in China
Send out and industrialization process.
Cogging torque (also referred to as magnetic resistance moment) be automatization's occasion, electromechanical integration occasion governing system in fatal
Defect.Existing reduction motor torque ripple method mainly has mark channel process, auxiliary channel process, assist tooth method, skewed slot
Method, oblique pole method, channel process of remaining silent and magnetization slot wedge method etc., these methods cut both ways, but are always difficult to effectively eliminate
Slot effect.Skewed slot or tiltedly pole are the methods of the most frequently used reduction torque fluctuations, but skewed slot and oblique pole method are to square-wave motor
Gap density flat-top width has an impact, and skewed stator slot makes production technology and structure complicated simultaneously, makes stator slot
Area reduces, and reduction is exerted oneself, and makes copper loss increase, and skewed slot and oblique pole both of which reduce exerts oneself, and the technique making motor
Complicated with structure, motor manufacturing cost improves.
Summary of the invention
For defect present in above-mentioned prior art, the technical problem to be solved is to provide and a kind of can drop
The torque fluctuations that low teeth groove causes, it is thus possible to the low fluctuation reducing the motor in electric automobile of mechanical vibration, noise is non-right
Title formula p-m rotor.
In order to solve above-mentioned technical problem, the low fluctuation asymmetric of a kind of motor in electric automobile provided by the present invention
P-m rotor, this rotor offers multiple yi word pattern permanent magnetism groove, is equipped with a word in each yi word pattern permanent magnetism groove
Type magnet steel, it is characterised in that:
Each yi word pattern permanent magnetism groove is divided into two classes, and a class therein is A class permanent magnetism groove, another kind of for B class permanent magnetism
Groove, and each A class permanent magnetism groove and each B class permanent magnetism groove alternately lay along the circumference of rotor, and each A class
Permanent magnetism groove to be inserted radially into the degree of depth consistent, each B class permanent magnetism groove to be inserted radially into the degree of depth consistent, yi word pattern permanent magnetism groove
The degree of depth that is inserted radially into refer to the minimum spacing between yi word pattern permanent magnetism groove and rotor axis；
If the degree of depth that is inserted radially into that the degree of depth is R1, B class permanent magnetism groove that is inserted radially into of A class permanent magnetism groove is R2, then have
R1>R2。
Further, in the radial section of rotor, each yi word pattern permanent magnetism groove is divided into by the field axis of rotor
Symmetrical two halves.
Further, in the radial section of rotor, the two ends of each yi word pattern permanent magnetism groove are both facing to rotor outer circle side
To bending.
Further, this rotor offers multiple V-type permanent magnetism groove, in each V-type permanent magnetism groove, is equipped with two
Lay forming V-shape yi word pattern magnet steel, the quantity of described yi word pattern permanent magnetism groove consistent with the quantity of V-type permanent magnetism groove and
One_to_one corresponding, each V-type permanent magnetism groove is around the axle center symmetry laying of rotor, and each V-type permanent magnetism groove is with corresponding
Yi word pattern permanent magnetism groove is the most sequentially laid along the radial direction of rotor.
Further, V-type permanent magnetism groove one double-deck permanent magnetism groove group of composition that each yi word pattern permanent magnetism groove is corresponding,
In the radial section of rotor, each double-deck permanent magnetism groove group is divided into the two halves of symmetry by the field axis of rotor.
Further, this rotor offers multiple U-shaped permanent magnetism groove, in each U-shaped permanent magnetism groove, is equipped with three
Cloth is set as the yi word pattern magnet steel of U-shaped, the quantity of described yi word pattern permanent magnetism groove consistent with the quantity of U-shaped permanent magnetism groove and
One_to_one corresponding, each U-shaped permanent magnetism groove is around the axle center symmetry laying of rotor, and each U-shaped permanent magnetism groove is with corresponding
Yi word pattern permanent magnetism groove is the most sequentially laid along the radial direction of rotor.
Further, rotor offers the adjustment hole of multiple ellipse, the quantity of described adjustment hole and yi word pattern
The quantity of permanent magnetism groove is consistent；Further, between the U-shaped permanent magnetism groove that each A class permanent magnetism groove is corresponding, has one
Adjustment hole, has an adjustment hole in the outside of each B class permanent magnetism groove, and each adjustment hole is by the magnetic pole shaft of rotor
Line is divided into the two halves of symmetry.
Further, U-shaped permanent magnetism groove one double-deck permanent magnetism groove group of composition that each yi word pattern permanent magnetism groove is corresponding,
In the radial section of rotor, each double-deck permanent magnetism groove group is divided into the two halves of symmetry by the field axis of rotor.
The low fluctuation asymmetric p-m rotor of the motor in electric automobile that the present invention provides, uses adjacent yi word pattern permanent magnetism
The mode being inserted radially into the degree of depth not grade of groove obtains between stator iron core chute, the oblique pole of rotor permanent magnet magnetic pole or rotor
Use technique and the baroque effect same such as non-uniform gap, make d axle (field axis) (adjacent with q axle
Pole center line) radial force tend to balance, can effectively eliminate slot effect, reduce the moment ripple that teeth groove causes
Dynamic, it is thus possible to reduce mechanical vibration, noise and back-emf harmonic wave, reduce core loss, it is achieved motor is efficient, high
The features such as power density, high reliability, wide range speed control, low noise, low smooth fluctuations operation.
Accompanying drawing explanation
Fig. 1 is that the radial direction of the low fluctuation asymmetric p-m rotor of the motor in electric automobile of first embodiment of the invention is cut
Face figure；
Fig. 2 is that the radial direction of the low fluctuation asymmetric p-m rotor of the motor in electric automobile of second embodiment of the invention is cut
Face figure；
Fig. 3 is that the radial direction of the low fluctuation asymmetric p-m rotor of the motor in electric automobile of third embodiment of the invention is cut
Face figure；
Fig. 4 is that the radial direction of the low fluctuation asymmetric p-m rotor of the motor in electric automobile of fourth embodiment of the invention is cut
Face figure；
Fig. 5 is the torque fluctuations that existing rated output power is the built-in yi word pattern permagnetic synchronous motor of 46KW
Curve chart, transverse axis θ therein is moment angle, and vertical pivot Tcog is moment；
Fig. 6 is the low fluctuation asymmetric p-m rotor of the motor in electric automobile that have employed second embodiment of the invention
Rated output power is the torque fluctuations curve chart of the motor of 46KW, and transverse axis θ therein is moment angle, vertical pivot
Tcog is moment；
Fig. 7 is the low fluctuation asymmetric p-m rotor of the motor in electric automobile that have employed fourth embodiment of the invention
Rated output power is the torque fluctuations curve chart of the motor of 46KW, and transverse axis θ therein is moment angle, vertical pivot
Tcog is moment.
Detailed description of the invention
Illustrate embodiments of the invention are described in further detail below in conjunction with accompanying drawing, but the present embodiment is not used to
Limit the present invention, the analog structure of every employing present invention and similar change thereof, the protection model of the present invention all should be listed in
Enclosing, the pause mark in the present invention all represents the relation of sum.
As it is shown in figure 1, the low fluctuation asymmetric of a kind of motor in electric automobile that first embodiment of the invention is provided
P-m rotor, this rotor 11 offers multiple yi word pattern permanent magnetism groove 12, sets in each yi word pattern permanent magnetism groove
There is yi word pattern magnet steel 13, it is characterised in that:
Each yi word pattern permanent magnetism groove 12 is divided into two classes, and a class therein is A class permanent magnetism groove, another kind of for B class forever
Magnetic groove, and each A class permanent magnetism groove and each B class permanent magnetism groove alternately lay along the circumference of rotor, and each A
Class permanent magnetism groove to be inserted radially into the degree of depth consistent, each B class permanent magnetism groove to be inserted radially into the degree of depth consistent, yi word pattern permanent magnetism
The degree of depth that is inserted radially into of groove refers to the minimum spacing between yi word pattern permanent magnetism groove and rotor axis；
If the degree of depth that is inserted radially into that the degree of depth is R1, B class permanent magnetism groove that is inserted radially into of A class permanent magnetism groove is R2, then have
R1>R2。
First embodiment of the invention is in the radial section of rotor 11, and each yi word pattern permanent magnetism groove 12 is by rotor
Field axis d is divided into the two halves of symmetry.
In first embodiment of the invention, adjacent yi word pattern permanent magnetism groove be inserted radially into the degree of depth, magnet steel is got over
Rotor rotor periphery (i.e. increases R1 or R2), and motor output torque is the biggest, but cogging torque and torque fluctuations are also
Can increase therewith, therefore regulation A class permanent magnetism groove and the difference being inserted radially into degree of depth R1, R2 of B class permanent magnetism groove, and
R1, R2 and the ratio of rotor radius R, can effectively reduce motor noise and torque fluctuations.
As in figure 2 it is shown, the low fluctuation asymmetric of a kind of motor in electric automobile that second embodiment of the invention is provided
P-m rotor, this rotor 21 offers multiple yi word pattern permanent magnetism groove 22, sets in each yi word pattern permanent magnetism groove
There is yi word pattern magnet steel 23, it is characterised in that:
Each yi word pattern permanent magnetism groove 22 is divided into two classes, and a class therein is A class permanent magnetism groove, another kind of for B class forever
Magnetic groove, and each A class permanent magnetism groove and each B class permanent magnetism groove alternately lay along the circumference of rotor, and each A
Class permanent magnetism groove to be inserted radially into the degree of depth consistent, each B class permanent magnetism groove to be inserted radially into the degree of depth consistent, yi word pattern permanent magnetism
The degree of depth that is inserted radially into of groove refers to the minimum spacing between yi word pattern permanent magnetism groove and rotor axis；
If the degree of depth that is inserted radially into that the degree of depth is R1, B class permanent magnetism groove that is inserted radially into of A class permanent magnetism groove is R2, then have
R1>R2；If the radius of rotor 21 is R, then R1/R is between 0.75 to 0.8, R2/R 0.5 to 0.55 it
Between.
Second embodiment of the invention is in the radial section of rotor 21, and each yi word pattern permanent magnetism groove 22 is by rotor
Field axis d is divided into the two halves of symmetry, and the two ends of each yi word pattern permanent magnetism groove 22 are both facing to rotor outer circle direction
Bending.
In second embodiment of the invention, first embodiment is compared closer to rotor periphery in yi word pattern permanent magnetism groove two ends, makes
Obtain the narrowed width between yi word pattern permanent magnetism groove end and rotor periphery, thus it be saturated to form magnetic circuit, can reduce leakage field,
Improve power density and efficiency.
In second embodiment of the invention, adjacent yi word pattern permanent magnetism groove be inserted radially into the degree of depth, magnet steel is got over
Rotor rotor periphery (i.e. increases R1 or R2), and motor output torque is the biggest, but cogging torque and torque fluctuations are also
Can increase therewith, therefore regulation A class permanent magnetism groove and the difference being inserted radially into degree of depth R1, R2 of B class permanent magnetism groove, and
R1, R2 and the ratio of rotor radius R, can effectively reduce motor noise and torque fluctuations.
As it is shown on figure 3, the low fluctuation asymmetric of a kind of motor in electric automobile that third embodiment of the invention is provided
P-m rotor, this rotor 31 offers multiple yi word pattern permanent magnetism groove 32, and multiple V-type permanent magnetism groove, described V
Type permanent magnetism groove is made up of the straight trough section 351,352 of two mutual partitions and laying forming V-shape, each yi word pattern permanent magnetism groove
All it is equipped with yi word pattern magnet steel 33 in 32, in each V-type permanent magnetism groove, is equipped with two yi word patterns laying forming V-shape
Magnet steel 33, the quantity of described yi word pattern permanent magnetism groove 32 is consistent with the quantity of V-type permanent magnetism groove and one_to_one corresponding, respectively
Individual V-type permanent magnetism groove is laid around the axle center symmetry of rotor, each V-type permanent magnetism groove and corresponding yi word pattern permanent magnetism groove
32 the most sequentially lay along the radial direction of rotor；
It is characterized in that: each yi word pattern permanent magnetism groove 32 is divided into two classes, a class therein is A class permanent magnetism groove, separately
One class is B class permanent magnetism groove, and each A class permanent magnetism groove is alternately laid along the circumference of rotor with each B class permanent magnetism groove,
And each A class permanent magnetism groove to be inserted radially into the degree of depth consistent, each B class permanent magnetism groove to be inserted radially into the degree of depth consistent,
The degree of depth that is inserted radially into of yi word pattern permanent magnetism groove 32 refers to the minimum spacing between yi word pattern permanent magnetism groove 32 and rotor axis；
If the degree of depth that is inserted radially into that the degree of depth is R1, B class permanent magnetism groove that is inserted radially into of A class permanent magnetism groove is R2, then have
R1>R2；If the radius of rotor 31 is R, then R1/R is between 0.76 to 0.82, and R2/R is 0.68 to 0.74
Between.
In third embodiment of the invention, the V-type permanent magnetism groove composition one that each yi word pattern permanent magnetism groove 32 is corresponding
Double-deck permanent magnetism groove group, in the radial section of rotor 31, each double-deck permanent magnetism groove group is by the magnetic pole shaft of rotor 31
Line is divided into the two halves of symmetry.
In third embodiment of the invention, adjacent yi word pattern permanent magnetism groove be inserted radially into the degree of depth, magnet steel is got over
Rotor rotor periphery (i.e. increases R1 or R2), and motor output torque is the biggest, but cogging torque and torque fluctuations are also
Can increase therewith, therefore regulation A class permanent magnetism groove and the difference being inserted radially into degree of depth R1, R2 of B class permanent magnetism groove, and
R1, R2 and the ratio of rotor radius R, can effectively reduce motor noise and torque fluctuations, simultaneously because have employed
Yi word pattern magnetic pole and the combination of V-type magnetic pole, have good poly-magnetic effect, can be effectively improved overload capacity and power
Density.
As shown in Figure 4, the low fluctuation asymmetric of a kind of motor in electric automobile that fourth embodiment of the invention is provided
P-m rotor, this rotor 41 offers multiple yi word pattern permanent magnetism groove 42, and multiple U-shaped permanent magnetism groove 45, each
All it is equipped with yi word pattern magnet steel 43 in yi word pattern permanent magnetism groove 42, in each U-shaped permanent magnetism groove 45, is equipped with three cloth
It is set as the yi word pattern magnet steel 43 of U-shaped, the quantity of described yi word pattern permanent magnetism groove 42 and the quantity one of U-shaped permanent magnetism groove 45
Causing and one_to_one corresponding, each U-shaped permanent magnetism groove 45 is laid around the axle center symmetry of rotor, each U-shaped permanent magnetism groove
45 all the most sequentially lay along the radial direction of rotor with corresponding yi word pattern permanent magnetism groove 42；
It is characterized in that: each yi word pattern permanent magnetism groove 42 is divided into two classes, a class therein is A class permanent magnetism groove, separately
One class is B class permanent magnetism groove, and each A class permanent magnetism groove is alternately laid along the circumference of rotor with each B class permanent magnetism groove,
And each A class permanent magnetism groove to be inserted radially into the degree of depth consistent, each B class permanent magnetism groove to be inserted radially into the degree of depth consistent,
The degree of depth that is inserted radially into of yi word pattern permanent magnetism groove 42 refers to the minimum spacing between yi word pattern permanent magnetism groove 42 and rotor axis；
If the degree of depth that is inserted radially into that the degree of depth is R1, B class permanent magnetism groove that is inserted radially into of A class permanent magnetism groove is R2, then have
R1>R2；If the radius of rotor 41 is R, then R1/R is between 0.75 to 0.8, R2/R 0.65 to 0.7 it
Between.
In fourth embodiment of the invention, rotor offers the adjustment hole 44 of multiple ellipse, described adjustment hole 44
Quantity consistent with the quantity of yi word pattern permanent magnetism groove 42；Further, each A class permanent magnetism groove corresponding U-shaped forever
There is an adjustment hole 44 between magnetic groove, have an adjustment hole 44, each tune in the outside of each B class permanent magnetism groove
Knothole 44 is all divided into the two halves of symmetry by the field axis of rotor 41.
In fourth embodiment of the invention, the U-shaped permanent magnetism groove composition one that each yi word pattern permanent magnetism groove 42 is corresponding
Double-deck permanent magnetism groove group, in the radial section of rotor 41, each double-deck permanent magnetism groove group is by the magnetic pole shaft of rotor 41
Line is divided into the two halves of symmetry.
In fourth embodiment of the invention, adjacent yi word pattern permanent magnetism groove be inserted radially into the degree of depth, magnet steel is got over
Rotor rotor periphery (i.e. increases R1 or R2), and motor output torque is the biggest, but cogging torque and torque fluctuations are also
Can increase therewith, therefore regulation A class permanent magnetism groove and the difference being inserted radially into degree of depth R1, R2 of B class permanent magnetism groove, and
R1, R2 and the ratio of rotor radius R, can effectively reduce motor noise and torque fluctuations, and also can pass through
Regulate the transverse of each adjustment hole and the lenth ratio of ellipse short shaft saturated to control magnetic flux magnetic circuit when the pole shoe
Degree, it is thus possible to regulation useful flux change, reduces teeth groove first-harmonic and higher hamonic wave moment amplitude, it is thus possible to enter one
The torque fluctuations that the reduction teeth groove of step causes.
In fourth embodiment of the invention, owing to have employed the combination of yi word pattern magnetic pole and U-shaped magnetic pole, not only have and cut
To the magnet steel in parallel magnetized, and there is again the series connection magnet steel of two pieces of radial magnetizings, thus there is series-parallel series-parallel connection magnetic
Road, this structure have significant poly-magnetic, improve air-gap field waveform, to reduce torque ripple, suppression static and dynamically
Armature-reaction effect, magnet steel magnetic force alignment pole shoe (magnetic pole) is close, and converges at one pole of pole center formation,
Making air gap flux density increase, due to the parameter of electric machine and size one timing, moment is directly proportional to air gap flux density, it is thus possible to carry
High motor overload ability and power density, make motor miniaturization；Built-in type permanent-magnet rotor is typical salient pole knot
Structure, saliency (convex grey subset) is notable, and quadrature axis inductance Lq is more than d-axis inductance Ld (i.e. Lq ＞ Ld), makes motor
Superposition reluctance torque on the basis of permanent-magnet torque, the existence of reluctance torque be favorably improved the starting characteristic of motor,
Overload capacity and power density, it is easy to weak-magnetic speed-regulating, expand invariable power scope and run, and the torque formula of motor can be used
Following formula represents:
In formula, T is the torque of motor, and p is magnetic pole logarithm, ψmdFor magnetic linkage, IqsFor quadrature axis current, IdsFor
Direct-axis current, LqFor quadrature axis inductance, LdFor d-axis inductance；
In formula, ψmdIqsFor electromagnetic torque, (Lq-Ld)IqsIdsFor reluctance torque；
From the torque formula of motor it can be seen that armature supply one timing, the reluctance torque of magneto is electric with Tong Bu
Sense difference (Lq-Ld) is directly proportional, and the synchronous inductance difference of the permanent-magnet rotor motor of U-shaped magnetic pole is greater than yi word pattern magnetic
The permanent-magnet rotor motor of pole and the permanent-magnet rotor motor of V-type magnetic pole, can significantly improve the weak of driving motor for electric automobile
Magnetism speed expansion ability.
The present invention first, second, third, fourth embodiment obtains and stator iron core chute, rotor permanent magnet magnetic pole
Tiltedly use the techniques such as non-uniform gap and the same effect of baroque measure between pole or rotor, reduce gas
The change of gap magnetic conductance, thus reduce the change of air-gap field energy storage when the rotor rotates, make d axle and q Axial and radial
Power tends to balance, and weakens critical defect in magnetic resistance moment (i.e. cogging torque) this drive system of electric automobile,
Inhibit the torque fluctuations that teeth groove causes, noise, mechanical vibration and stator during rotor high-speed cruising can be substantially reduced
Deformation unshakable in one's determination, is particularly significantly reduced back-emf harmonic component, can effectively reduce back-emf total harmonic distortion THD
(Total Harmonic Distortion), beneficially motor frequent starting, can improve efficiency, overload capacity and
Power density.
Fig. 5 is the torque fluctuations that existing rated output power is the built-in yi word pattern permagnetic synchronous motor of 46KW
Curve chart, transverse axis θ therein is moment angle, and vertical pivot Tcog is moment；
Fig. 6 is the low fluctuation asymmetric p-m rotor of the motor in electric automobile that have employed second embodiment of the invention
Rated output power is the torque fluctuations curve chart of the motor of 46KW, and transverse axis θ therein is moment angle, vertical pivot
Tcog is moment；
Fig. 7 is the low fluctuation asymmetric p-m rotor of the motor in electric automobile that have employed fourth embodiment of the invention
Rated output power is the torque fluctuations curve chart of the motor of 46KW, and transverse axis θ therein is moment angle, vertical pivot
Tcog is moment；
As shown in Figure 5-Figure 7, have employed the low fluctuation asymmetric of motor in electric automobile of various embodiments of the present invention forever
The motor of magnet rotor compares existing built-in yi word pattern permagnetic synchronous motor, output, electric current, efficiency and moment
Fluctuation all has clear improvement, and motor radial force tends to balance, and can reduce mechanical vibration, is significantly reduced rotor at a high speed
Centrifugal force during fortune, beneficially motor frequent starting, improve overload capacity, be effectively improved the combination property of motor,
Electric automobile can be met and drive requirement, it is achieved the fluctuation of high power density, low noise, Low-torque, wide range speed control small-size light-weight
The features such as change and even running.
Claims (8)
1. a low fluctuation asymmetric p-m rotor for motor in electric automobile, this rotor offers multiple yi word pattern permanent magnetism groove, is equipped with yi word pattern magnet steel in each yi word pattern permanent magnetism groove, it is characterised in that:
Each yi word pattern permanent magnetism groove is divided into two classes, a class therein is A class permanent magnetism groove, another kind of for B class permanent magnetism groove, and each A class permanent magnetism groove is alternately laid along the circumference of rotor with each B class permanent magnetism groove, and each A class permanent magnetism groove to be inserted radially into the degree of depth consistent, each B class permanent magnetism groove to be inserted radially into the degree of depth consistent, the degree of depth that is inserted radially into of yi word pattern permanent magnetism groove refers to the minimum spacing between yi word pattern permanent magnetism groove and rotor axis；
If the degree of depth that is inserted radially into that the degree of depth is R1, B class permanent magnetism groove that is inserted radially into of A class permanent magnetism groove is R2, then there is R1 > R2.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 1, it is characterised in that: in the radial section of rotor, each yi word pattern permanent magnetism groove is divided into the two halves of symmetry by the field axis of rotor.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 2, it is characterised in that: in the radial section of rotor, the two ends of each yi word pattern permanent magnetism groove bend both facing to rotor outer circle direction.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 1, it is characterized in that: on this rotor, offer multiple V-type permanent magnetism groove, two yi word pattern magnet steel laying forming V-shape it are equipped with in each V-type permanent magnetism groove, the quantity of described yi word pattern permanent magnetism groove is consistent with the quantity of V-type permanent magnetism groove and one_to_one corresponding, each V-type permanent magnetism groove is laid around the axle center symmetry of rotor, and each V-type permanent magnetism groove is the most sequentially laid along the radial direction of rotor with corresponding yi word pattern permanent magnetism groove.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 4, it is characterized in that: V-type permanent magnetism groove one double-deck permanent magnetism groove group of composition that each yi word pattern permanent magnetism groove is corresponding, in the radial section of rotor, each double-deck permanent magnetism groove group is divided into the two halves of symmetry by the field axis of rotor.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 1, it is characterized in that: on this rotor, offer multiple U-shaped permanent magnetism groove, it is equipped with three cloth in each U-shaped permanent magnetism groove and is set as the yi word pattern magnet steel of U-shaped, the quantity of described yi word pattern permanent magnetism groove is consistent with the quantity of U-shaped permanent magnetism groove and one_to_one corresponding, each U-shaped permanent magnetism groove is laid around the axle center symmetry of rotor, and each U-shaped permanent magnetism groove is the most sequentially laid along the radial direction of rotor with corresponding yi word pattern permanent magnetism groove.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 6, it is characterised in that: offering the adjustment hole of multiple ellipse on rotor, the quantity of described adjustment hole is consistent with the quantity of yi word pattern permanent magnetism groove；Further, having an adjustment hole, have an adjustment hole in the outside of each B class permanent magnetism groove between the U-shaped permanent magnetism groove that each A class permanent magnetism groove is corresponding, each adjustment hole is divided into the two halves of symmetry by the field axis of rotor.
The low fluctuation asymmetric p-m rotor of motor in electric automobile the most according to claim 6, it is characterized in that: U-shaped permanent magnetism groove one double-deck permanent magnetism groove group of composition that each yi word pattern permanent magnetism groove is corresponding, in the radial section of rotor, each double-deck permanent magnetism groove group is divided into the two halves of symmetry by the field axis of rotor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610394854.1A CN105871098A (en) | 2016-06-06 | 2016-06-06 | Low-fluctuation asymmetric type permanent magnetic rotor for electric vehicle motor |
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| CN201610394854.1A CN105871098A (en) | 2016-06-06 | 2016-06-06 | Low-fluctuation asymmetric type permanent magnetic rotor for electric vehicle motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017206928A1 (en) * | 2017-04-25 | 2018-10-25 | Volkswagen Aktiengesellschaft | Electric machine comprising a stator and a rotor and rotor for an electric machine |
| WO2022047938A1 (en) * | 2020-09-01 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Linear motor |
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| DE102017206928A1 (en) * | 2017-04-25 | 2018-10-25 | Volkswagen Aktiengesellschaft | Electric machine comprising a stator and a rotor and rotor for an electric machine |
| WO2022047938A1 (en) * | 2020-09-01 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Linear motor |
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