CN108418324B - Permanent magnet motor rotor, magnetizing equipment, preparation method and permanent magnet motor - Google Patents
Permanent magnet motor rotor, magnetizing equipment, preparation method and permanent magnet motor Download PDFInfo
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- CN108418324B CN108418324B CN201810160131.4A CN201810160131A CN108418324B CN 108418324 B CN108418324 B CN 108418324B CN 201810160131 A CN201810160131 A CN 201810160131A CN 108418324 B CN108418324 B CN 108418324B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
Abstract
The invention provides a permanent magnet motor rotor, magnetizing equipment, a preparation method and a permanent magnet motor, which comprise the following steps: the rotor comprises a first annular rotor split body, wherein a plurality of first slotted parts are formed in the inner ring side wall of the first annular rotor split body, the first slotted parts are distributed along the circumferential direction and respectively penetrate through one end face of the first annular rotor split body and the outer ring side wall, a first rotor petal body is formed between any two adjacent first slotted parts, a plurality of magnetic steel through grooves are uniformly formed in the other end face of the first annular rotor split body along the radial direction, the magnetic steel through grooves can penetrate through the first rotor petal body, and the magnetic steel through grooves are used for being spliced with magnetic steel; and a second annular rotor split body fitted with the first annular rotor split body. Through the technical scheme of the invention, the magnetizing quantity is more saturated, the difficulty of the manufacturing process is reduced, the mass production is convenient, and the power density and the efficiency of the motor are improved.
Description
Technical Field
The invention relates to the field of motors, in particular to a permanent magnet motor rotor, magnetizing equipment, a manufacturing method of the permanent magnet motor rotor and a permanent magnet motor.
Background
At present, the rotor structure of a permanent magnet motor mainly comprises a surface-mounted type rotor structure, a built-in linear type rotor structure, a built-in tangential type rotor structure, a built-in V-shaped rotor structure and the like, and the servo motor industry at present mainly adopts the surface-mounted type rotor structure, and has the advantages that the integral magnetization is easy, the driving control mode is simple, the weak magnetic proportion of the surface-mounted type rotor structure is not the same as that of the built-in rotor structure, so that the surface-mounted type rotor structure cannot achieve high power density, the built-in linear type rotor structure is not as obvious in magnetic gathering effect as the built-in tangential type rotor structure, and the.
In the related art, for the built-in tangential rotor structure, a manufacturing process of magnetizing before inserting is mostly adopted, but the defects of high error rate and high manufacturing difficulty exist.
Disclosure of Invention
In order to solve at least one of the above technical problems, an object of the present invention is to provide a rotor of a permanent magnet motor.
Another object of the present invention is to provide a magnetizing apparatus.
The invention further aims to provide a preparation method of the permanent magnet motor rotor.
It is a further object of the present invention to provide a permanent magnet electric machine.
In order to achieve the above object, a first aspect of the present invention provides a permanent magnet motor rotor, including: the rotor comprises a first annular rotor split body, wherein a plurality of first slotted parts are formed in the inner ring side wall of the first annular rotor split body, the first slotted parts are distributed along the circumferential direction and respectively penetrate through one end face of the first annular rotor split body and the outer ring side wall, a first rotor petal body is formed between any two adjacent first slotted parts, a plurality of magnetic steel through grooves are uniformly formed in the other end face of the first annular rotor split body along the radial direction, the magnetic steel through grooves can penetrate through the first rotor petal body, and the magnetic steel through grooves are used for being spliced with magnetic steel; the second annular rotor components of a whole that can function independently, cooperate one by one with a plurality of first rotor lamella bodies on the inner ring lateral wall of second annular rotor components of a whole that can function independently and seted up a plurality of second fluting portions, a plurality of second fluting portions run through an terminal surface and the outer loop lateral wall of second annular rotor components of a whole that can function independently respectively, construct between two arbitrary adjacent second fluting portions and form the second rotor lamella body, correspond on another terminal surface of second annular rotor components of a whole that can function independently and set up a plurality of magnet steel logical grooves, the magnet steel logical groove can run through the second rotor lamella body, wherein, through first annular rotor components of a whole that can function independently and second annular rotor components of a.
In the technical scheme, a permanent magnet motor rotor is axially split into a first annular rotor split body and a second annular rotor split body, magnetic steel through grooves are respectively formed in a first rotor flap body on the first annular rotor split body and a second rotor flap body on the second annular rotor split body, the magnetic steel through grooves axially extend on the rotor flap bodies and penetrate through the outer end face, a built-in tangential rotor structure is formed by inserting a magnetic steel structure, the split structure is split into two annular rotor split bodies, compared with the mode that magnetization is performed firstly and then an integral rotor iron core is inserted in the prior art, the magnetic steel to be magnetized is assembled in the magnetic steel through grooves, then the magnetization amount is saturated by assembling the first annular rotor split body and the second annular rotor split body into a whole body, the difficulty of the manufacturing process is reduced, and the mass production is convenient, and contributes to improving the power density and efficiency of the motor.
Wherein, the slotted hole that the logical groove of magnet steel formed on the complete terminal surface of guaranteeing first annular rotor components of a whole that can function independently is evenly distributed along circumference, the slotted hole that the logical groove of magnet steel formed on the complete terminal surface of second annular rotor components of a whole that can function independently is evenly distributed along circumference, and under the prerequisite that fluting portion on the first annular rotor components of a whole that can function independently and rotor lamella on the second annular rotor components of a whole that can function independently cooperatees (or fluting portion on the second annular rotor components of a whole that can function independently and rotor lamella on the first annular rotor components of a whole that can function independently) the rotor lamella body can evenly distributed along circumference, also can non-circumference evenly distributed, and the logical groove quantity of magnet steel.
Specifically, first annular rotor components of a whole that can function independently and second annular rotor components of a whole that can function independently have two rotor terminal surfaces and the rotor lamella body of permanent-magnet machine rotor, wherein, the rotor lamella body is the inboard of rotor terminal surface, forms to the axial extension structure.
In addition, the permanent magnet motor rotor in the above embodiment provided by the present invention may further have the following additional technical features:
in the above technical solution, preferably, the diameters of the first annular rotor split body and the second annular rotor split body are the same, the plurality of first slot portions are uniformly formed along the circumferential direction, and the plurality of first rotor lobes are uniformly distributed.
In this technical scheme, evenly set up through injecing a plurality of first fluting portions to a plurality of first rotor lamella bodies are evenly laid, and the second rotor lamella body that corresponds with first fluting portion also evenly distributed, and the second fluting portion that corresponds with first rotor lamella body also evenly sets up, is favorable to reducing the processing complexity.
Wherein, the angle of first fluting portion and first rotor lamella body can be the same, also can be different, for example when the angle of rotor lamella body is greater than the angle of fluting portion, can set up two magnet steel logical grooves on a rotor lamella body.
In any one of the above technical solutions, preferably, the number of the rotor lobes is the same as the number of poles of the permanent magnet motor rotor, and each rotor lobe is provided with one magnetic steel through groove.
In this technical scheme, because on every annular rotor components of a whole that can function independently, the quantity of fluting portion is the same with the quantity of rotor lamella body, and the quantity that opens the magnet steel through groove on every rotor lamella body this moment is one, and according to the angle setting of fluting portion and rotor lamella body, a magnet steel through groove can open the intermediate position at rotor lamella body, also can open at non-intermediate position.
In any one of the above technical solutions, preferably, the first slot portion and the second rotor petal body that cooperate, or the second slot portion and the first rotor petal body have the same profile, so that the side wall of the adjacent first rotor petal body and the side wall of the second rotor petal body are fitted.
In this technical scheme, when first fluting portion and the second rotor lamella body that matches, or second fluting portion and first rotor lamella body have the same profile, the magnet steel leads to the groove and sets up in the intermediate position of rotor lamella body to realize the axisymmetric structure of annular rotor components of a whole that can function independently, and then be favorable to carrying out the optimization setting to power density.
In any of the above technical solutions, preferably, the first rotor lobe and the second rotor lobe have the same structure; the polarity of the magnetic steel in the first rotor lobe body is opposite to that of the magnetic steel in the second rotor lobe body.
Specifically, p magnet steel of treating magnetizing are inserted in the magnet steel mounting groove in the rotor lamella body of first annular rotor components of a whole that can function independently, p magnet steel of treating magnetizing also are inserted in the magnet steel mounting groove in the rotor lamella body of second annular rotor components of a whole that can function independently, carry out whole magnetizing respectively with the second rotor according to corresponding magnet steel polarity with the first annular rotor components of a whole that can function independently and the second annular rotor components of a whole that can function independently axial butt joint cooperation equipment after the completion of magnetizing, form complete rotor, and the completion of magnetizing.
In addition, the end face of the annular rotor split body which is not penetrated has the designated thickness, the designated thickness is based on the requirement of the overall strength after the annular rotor split body is grooved, after the assembly is completed, the section shape is the same as that of the complete rotor core which is not split in the prior art, and the magnetic steel mounting groove part arranged in the area of the end face of the rotor can be inserted into the magnetic steel or the gap.
In any of the above technical solutions, preferably, the slotted portion is a straight slot or an inclined slot, wherein, when the slotted portion is an inclined slot, the inclination direction on the first annular rotor division body is opposite to the inclination direction on the second annular rotor division body.
In any one of the above technical solutions, preferably, one of the side wall of the adjacent first rotor petal body and the side wall of the second rotor petal body is provided with a protruding step structure, and the other is provided with a recessed step structure matched with the protruding step structure.
In the technical scheme, the splicing function is realized by respectively arranging the convex step structure and the concave step structure on the corresponding side walls, so that the stable assembly of two annular rotors in a split manner is ensured. In addition, other corresponding splicing structures can be arranged on the inner side wall.
The technical solution of the second aspect of the present invention provides a magnetizing apparatus, including: the magnetizing fixture is provided with a plurality of coil slots; a magnetic charging head which is arranged at the inner side of the coil slot and can be assembled in the first slot part and/or the second slot part; and the magnetizing coils are respectively wound in the two adjacent coil slots, wherein the number of the magnetizing coils is the same as the number of pole pairs of the rotor of the permanent magnet motor, and the magnetizing heads and the magnetizing clamp are magnetic conduction pieces.
In the technical scheme, the magnetizing equipment for respectively magnetizing the first annular rotor split body and the second annular rotor split body comprises a magnetizing head, a magnetizing fixture and a magnetizing coil, wherein the magnetizing head is magnetically conductive, the gap between the magnetizing head and the rotor lobe body is mutually matched, the magnetizing fixture comprises 2p grooves for mounting the magnetizing coil, one coil is wound between every two grooves, and p coils in the same direction are wound together to magnetize the magnetic steel to form the permanent magnet, so that the manufacturing difficulty is relatively low, and the magnetizing efficiency is high.
In the above technical solution, preferably, the structure of the magnetic charging head is adapted to the slotted portion.
The technical scheme of the third aspect of the invention provides a preparation method of a permanent magnet motor rotor, which comprises the following steps: respectively inserting magnetic steels to be magnetized into the magnetic steel through grooves of the first annular rotor split body and the magnetic steel through grooves of the second annular rotor split body; the magnetizing device provided by the technical scheme of the second aspect of the invention is used for respectively carrying out magnetizing operation on the first annular rotor split body and the second annular rotor split body; and after the first annular rotor split body and the second annular rotor split body are assembled into the permanent magnet motor rotor, the permanent magnet motor rotor is provided with rotor lobe bodies with the number of poles, and the magnetizing magnetic steel in the rotor lobe bodies can emit magnetic fields which are uniformly distributed along the same circumferential direction.
In the technical scheme, after the magnetic steel to be magnetized is assembled in the magnetic steel through groove, the magnetizing operation is executed, and then the first annular rotor split body and the second annular rotor split body are assembled into a whole body, so that the magnetizing quantity is saturated, the difficulty of the manufacturing process is reduced, the mass production is facilitated, and the power density and the efficiency of the motor are improved.
After the first annular rotor split body and the second annular rotor split body are magnetized, magnetic pole magnetic steels are distributed in the same mode, and formed magnetic poles are arranged in a staggered mode after butt joint and splicing.
In the above technical solution, preferably, the first annular rotor split body and the second annular rotor split body after the completion of magnetization are assembled in a butt-joint fit manner along the axial direction to form a permanent magnet motor rotor, specifically including the following steps: after the first annular rotor split body and the second annular rotor split body are in butt joint and splicing along the axial direction, the first annular rotor split body and the second annular rotor split body are fixedly assembled by adopting an integral injection molding process.
In the technical scheme, the first annular rotor split body and the second annular rotor split body are fixedly assembled by adopting an integral injection molding process, so that on one hand, the fixing strength of the first annular rotor split body and the second annular rotor split body can be ensured, and on the other hand, the integrity of the permanent magnet motor rotor formed by the first annular rotor split body and the second annular rotor split body is stronger by adopting the integral injection molding process.
In any one of the above technical solutions, preferably, before the magnetic steel through groove that will wait to magnetize the magnetic steel and insert the magnetic steel through groove of the first annular rotor components of a whole that can function independently respectively, still include with the magnetic steel through groove of the second annular rotor components of a whole that can function independently: punching the annular rotor split rotor end face along the circumferential direction by adopting a punching process; and the rotor lobe bodies of the annular rotor split bodies are formed by punching along the axial direction so as to form a first annular rotor split body and a second annular rotor split body respectively.
According to the technical scheme, the first annular rotor split body and the second annular rotor split body are formed by adopting a stamping process, so that the manufacturing is simple, and the reliability is high.
A fourth aspect of the present invention provides a permanent magnet motor, including: the technical scheme of the first aspect of the invention provides a permanent magnet motor rotor; and the motor stator is sleeved and matched with the permanent magnet motor rotor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
figure 1 shows an exploded view of a permanent magnet machine rotor according to one embodiment of the invention;
figure 2 shows a schematic plan view of a rotor of a permanent magnet electrical machine according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of the section A-A in FIG. 2;
figure 4 shows a schematic view of an assembled structure of a rotor of a permanent magnet electrical machine according to an embodiment of the invention;
FIG. 5 shows a schematic structural diagram of a ring rotor split charging at a given moment using a charging apparatus according to an embodiment of the present invention;
fig. 6 shows a schematic flow diagram of a method of manufacturing a rotor for a permanent magnet electric machine according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:
10 permanent magnet motor rotor, 10A first annular rotor split body, 102 first slotted part, 104 first rotor flap body, 106 first rotor end face, 108 magnetic steel through groove, 110 magnetic steel, 10B second annular rotor split body, 102' second slotted part, 104' second rotor flap body, 106' second rotor end face, 1042 outer ring side wall, 1044 inner ring side wall, 1046 butt joint face, 1048 flap body side wall, 20 magnetizing equipment, 202 magnetizing fixture, 204 magnetizing head, 206 magnetizing coil.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A permanent magnet machine rotor according to some embodiments of the invention is described below with reference to fig. 1-4.
The first embodiment is as follows:
as shown in fig. 1 to 4, a rotor 10 of a permanent magnet motor according to an embodiment of the present invention includes: the rotor structure comprises a first annular rotor split body 10A, wherein a plurality of first groove parts 102 are formed in the inner ring side wall of the first annular rotor split body 10A, the plurality of first groove parts 102 are distributed along the circumferential direction and respectively penetrate through one end face of the first annular rotor split body 10A and an outer ring side wall 1042, a first rotor flap part 104 is formed between any two adjacent first groove parts 102, a plurality of magnetic steel through grooves 108 are uniformly formed in the other end face (a first rotor end face 106) of the first annular rotor split body 10A along the radial direction, the magnetic steel through grooves 108 can penetrate through the first rotor flap part 104, and the magnetic steel through grooves 108 are used for being inserted with magnetic steels 110; in the second annular rotor split body 10B, the inner ring side wall of the second annular rotor split body 10B is provided with a plurality of second slot portions 102 'in one-to-one fit with the plurality of first rotor lobe portions 104, the plurality of second slot portions 102' respectively penetrate through one end face of the second annular rotor split body 10B and the outer ring side wall 1042, a second rotor lobe portion 104 'is formed between any two adjacent second slot portions 102', the other end face (second rotor end face 106') of the second annular rotor split body 10B is correspondingly provided with a plurality of magnetic steel through grooves 108, and the magnetic steel through grooves 108 can penetrate through the second rotor lobe portion 104', wherein the permanent magnet motor rotor 10 is formed by axially butt-assembling the first annular rotor split body 10A and the second annular rotor split body 10B.
In this embodiment, the permanent magnet motor rotor 10 is axially split into a first annular rotor split 10A and a second annular rotor split 10B, and a magnetic steel through groove 108 is respectively formed on the first rotor lobe part 104 on the first annular rotor split 10A and the second rotor lobe part 104' on the second annular rotor split 10B, the magnetic steel through groove 108 extends axially on the rotor lobe part and penetrates through the outer end face, a built-in tangential rotor structure is formed by inserting the magnetic steel 110, compared with the prior art in which the magnetic steel 110 is inserted into the rotor core, the magnetic steel 110 to be magnetized is assembled in the magnetic steel through groove 108, and then the first annular rotor split 10A and the second annular rotor split 10B are assembled into a whole body, so that the magnetizing amount is more saturated, the difficulty of the manufacturing process is reduced, the batch production is convenient, and the power density and the efficiency of the motor are improved.
Under the premise that the groove holes formed by the magnetic steel through grooves 108 on the complete end face of the first annular rotor split body 10A are uniformly distributed in the circumferential direction, the groove holes formed by the magnetic steel through grooves 108 on the complete end face of the second annular rotor split body 10B are uniformly distributed in the circumferential direction, and the slotted part on the first annular rotor split body 10A is matched with the rotor lobes on the second annular rotor split body 10B (or the slotted part on the second annular rotor split body 10B is matched with the rotor lobes on the first annular rotor split body 10A), the rotor lobe bodies can be uniformly distributed in the circumferential direction or non-uniformly distributed in the circumferential direction, and one or more magnetic steel through grooves 108 can be formed in one rotor lobe body.
As shown in fig. 1, the first rotor flap portion 104 is formed by surrounding an outer ring sidewall 1042, an inner ring sidewall 1044, an abutting surface 1046 and a flap sidewall 1048, wherein when the first annular rotor split body 10A and the second annular rotor split body 10B are assembled in an axially abutting manner, the abutting surface 1046 and a bottom surface of a corresponding second slot portion 102' of the second annular rotor split body 10B are disposed in an abutting manner.
Specifically, the first annular rotor split body 10A and the second annular rotor split body 10B respectively have two rotor end faces of the permanent magnet motor rotor 10 and a rotor lobe body, wherein the rotor lobe body is an inner side of the rotor end face and is formed in an axially extending configuration.
In addition, the permanent magnet motor rotor 10 in the above embodiment provided by the present invention may also have the following additional technical features:
in the above embodiment, it is preferable that the first annular rotor division body 10A and the second annular rotor division body 10B have the same diameter, the plurality of first groove portions 102 are uniformly opened in the circumferential direction, and the plurality of first rotor lobe portions 104 are uniformly distributed.
In this embodiment, by defining that the plurality of first slot portions 102 are uniformly opened and the plurality of first rotor lobe portions 104 are uniformly arranged, the second rotor lobe portions 104 'corresponding to the first slot portions 102 are also uniformly distributed, and the second slot portions 102' corresponding to the first rotor lobe portions 104 are also uniformly opened, which is beneficial to reducing the processing complexity.
The angles of the first slot portion 102 and the first rotor lobe portion 104 may be the same or different, for example, when the angle of the rotor lobe is greater than that of the slot portion, two magnetic steel through slots 108 may be formed in one rotor lobe.
In any of the above embodiments, preferably, the number of the rotor lobes is the same as the number of poles of the permanent magnet motor rotor 10, and each rotor lobe is provided with one magnetic steel through slot 108.
In this embodiment, since the number of the slotted portions is the same as the number of the rotor lobe bodies in each annular rotor split body, the number of the magnetic steel through grooves 108 opened in each rotor lobe body is one, and one magnetic steel through groove 108 may be opened in the middle position or in a non-middle position of the rotor lobe body according to the angle setting of the slotted portion and the rotor lobe body.
In any of the above embodiments, preferably, the mating first slotted portion 102 and second rotor lobe portion 104', or the second slotted portion 102' and first rotor lobe portion 104 have the same profile, such that the side wall of the adjacent first rotor lobe portion 104 and the side wall of the second rotor lobe portion 104' are in close fitting arrangement.
In this embodiment, when the first slot portion 102 and the second rotor lobe portion 104 'or the second slot portion 102' and the first rotor lobe portion 104 have the same profile, the magnetic steel through slot 108 is opened in the middle of the rotor lobe body to realize the axisymmetric structure of the annular rotor split body, thereby facilitating the optimal setting of the power density.
Example two:
as shown in fig. 1 to 4, in any of the above embodiments, preferably, the first rotor lobe body 104 is identical in structure to the second rotor lobe body 104'; the polarity of the magnetic steel 110 in the first rotor lobe portion 104 is opposite to the polarity of the magnetic steel 110 in the second rotor lobe portion 104'.
Specifically, p magnet steels 110 to be magnetized are inserted into the magnet steel 110 mounting groove in the rotor lobe body of the first annular rotor split body 10A, p magnet steels 110 to be magnetized are also inserted into the magnet steel 110 mounting groove in the rotor lobe body of the second annular rotor split body 10B, the first annular rotor split body 10A and the second rotor which are inserted into the magnet steels 110 are respectively and integrally magnetized according to the corresponding polarities of the magnet steels 110, the first annular rotor split body 10A and the second annular rotor split body 10B are assembled in an axial butt joint matching mode after the magnetization is completed, a complete rotor is formed, and the magnetization is completed.
In addition, the end face of the annular rotor split body which is not penetrated has the designated thickness, the designated thickness is based on the requirement of the overall strength after the annular rotor split body is grooved, after the assembly is finished, the section shape is the same as that of the complete rotor core which is not split in the prior art, and the installation groove part of the magnetic steel 110 arranged in the area of the end face of the rotor can be inserted into the magnetic steel 110 or be vacant.
As shown in fig. 1, the thickness between the first rotor end surface and the corresponding first slot portion is short, the axial length of the first rotor segment 104 is long, the annular rotor segments are uniformly distributed, the rotor segments of the two annular rotor split bodies have the same shape, and the rotor segments are circumferentially staggered by 180 electrical degrees when assembled.
In any of the above embodiments, preferably, the split portion is a straight slot or an inclined slot, wherein when the split portion is an inclined slot, the inclination direction on the first annular rotor division body 10A is opposite to the inclination direction on the second annular rotor division body 10B.
In any of the above embodiments, preferably, one of the side walls of the adjacent first rotor lobe portion 104 and the side wall of the second rotor lobe portion 104' is provided with a raised step structure, and the other is provided with a recessed step structure matching the raised step structure.
In this embodiment, the splicing function is realized by respectively providing the convex step structure and the concave step structure on the corresponding side walls, so as to ensure the stable assembly of the two split annular rotors.
In addition, other corresponding splicing structures can be arranged on the inner side wall.
Example three:
a magnetizing apparatus 20 according to some embodiments of the present invention is described below with reference to fig. 5.
As shown in fig. 5, a magnetizing apparatus 20 according to an embodiment of the present invention includes: the magnetizing fixture 202, a plurality of coil slots are arranged on the magnetizing fixture 202; a magnetizing head 204 which is provided inside the coil slot and can be assembled in the first slot part 102 and/or the second slot part 102'; and the magnetizing coils 206 are respectively wound in the two adjacent coil slots, wherein the number of the magnetizing coils 206 is the same as the number of pole pairs of the permanent magnet motor rotor 10, and the magnetizing head 204 and the magnetizing clamp 202 are both magnetic conductive members.
In this embodiment, the magnetizing apparatus 20 for respectively magnetizing the first annular rotor split body 10A and the second annular rotor split body 10B includes a magnetic conductive magnetizing head 204, a magnetic conductive magnetizing fixture 202, and a magnetizing coil 206, wherein gaps between the magnetizing head 204 and the rotor lobe bodies are adapted to each other, the magnetizing fixture 202 includes 2p slots for mounting the magnetizing coil 206, one coil is wound between every two slots, p coils in the same direction are wound together, and energization is performed through the coils, as shown in fig. 5, "X" indicates a current flowing direction, "O" indicates a current flowing direction, so as to realize magnetizing the magnetic steel 110 to form a permanent magnet, and the manufacturing difficulty is relatively low, and the magnetizing efficiency is high.
In the above embodiment, it is preferable that the structure of the charger head 204 is configured to fit the slot.
Example four:
as shown in fig. 5 and 6, a method for manufacturing a rotor of a permanent magnet motor according to an embodiment of the present invention includes: step 602, respectively inserting magnetic steels to be magnetized into a magnetic steel through groove of a first annular rotor split body and a magnetic steel through groove of a second annular rotor split body; step 604, performing magnetizing operations on the first annular rotor split body and the second annular rotor split body respectively by using the magnetizing equipment provided by any one of the embodiments; and 606, assembling the first annular rotor split body and the second annular rotor split body after the magnetization is finished in a butt joint matching mode along the axial direction to form a permanent magnet motor rotor with a plurality of magnetic poles, wherein after the first annular rotor split body and the second annular rotor split body are assembled into the permanent magnet motor rotor, the permanent magnet motor rotor is provided with rotor flap bodies with the number of poles, and the magnetizing magnetic steel in the rotor flap bodies can emit magnetic fields which are uniformly distributed along the same circumferential direction.
In the embodiment, after the magnetic steel to be magnetized is assembled in the magnetic steel through groove, the magnetizing operation is executed, then the first annular rotor split body and the second annular rotor split body are assembled into the integrated body, and the direction of the magnetic field emitted by the magnetized magnetic steel is shown in fig. 5.
In the above embodiment, preferably, the first annular rotor split body and the second annular rotor split body after the magnetization is completed are assembled in a butt-joint fit manner along the axial direction to form the permanent magnet motor rotor, specifically including the following steps: after the first annular rotor split body and the second annular rotor split body are in butt joint and splicing along the axial direction, the first annular rotor split body and the second annular rotor split body are fixedly assembled by adopting an integral injection molding process.
In this embodiment, the first annular rotor split body and the second annular rotor split body are fixedly assembled by using an integral injection molding process, so that on one hand, the fixing strength of the first annular rotor split body and the second annular rotor split body can be ensured, and on the other hand, the integrity of the permanent magnet motor rotor formed by the first annular rotor split body and the second annular rotor split body is stronger by using the integral injection molding process.
Specifically, first annular rotor components of a whole that can function independently and second annular rotor components of a whole that can function independently are provided with 2p magnet steel and lead to the groove respectively, and wherein, p magnet steel lead to the groove and correspond with fluting portion, and p magnet steel lead to the groove and correspond with the rotor lamella body, and when first annular rotor components of a whole that can function independently and second annular rotor butt joint, 2p magnet steel lead to the groove and correspond the setting one by one to after forming a whole rotor, form p number of pole pairs, the both sides that every magnet steel led to the groove promptly form 1 pair of magnetic pole respectively.
In any of the above embodiments, preferably, before inserting the magnetic steel to be magnetized into the magnetic steel through groove of the first annular rotor split body and the magnetic steel through groove of the second annular rotor split body, the method further includes: punching the annular rotor split rotor end face along the circumferential direction by adopting a punching process; and the rotor lobe bodies of the annular rotor split bodies are formed by punching along the axial direction so as to form a first annular rotor split body and a second annular rotor split body respectively.
In the embodiment, the first annular rotor split body and the second annular rotor split body are formed by adopting a stamping process, so that the manufacturing is simple, and the reliability is high.
A permanent magnet electric machine according to one embodiment of the invention comprises: the permanent magnet motor rotor provided by any one of the above embodiments; and the motor stator is sleeved and matched with the permanent magnet motor rotor.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A permanent magnet motor rotor, comprising:
the rotor comprises a first annular rotor split body, wherein a plurality of first slotted parts are formed in the inner ring side wall of the first annular rotor split body, the first slotted parts are distributed along the circumferential direction and respectively penetrate through one end face of the first annular rotor split body and the outer ring side wall, a first rotor flap body is formed between any two adjacent first slotted parts, a plurality of magnetic steel through grooves are uniformly formed in the other end face of the first annular rotor split body along the radial direction, the magnetic steel through grooves can penetrate through the first rotor flap body, and the magnetic steel through grooves are used for being inserted with magnetic steel;
the inner ring side wall of the second annular rotor split body is matched with the first rotor valve bodies one by one to form a plurality of second slotted parts which respectively penetrate through one end face and the outer ring side wall of the second annular rotor split body, a second rotor valve body is formed between any two adjacent second slotted parts, the other end face of the second annular rotor split body is correspondingly provided with a plurality of magnetic steel through grooves, and the magnetic steel through grooves can penetrate through the second rotor valve body,
and the first annular rotor split body and the second annular rotor split body are axially assembled in a butt joint mode to form the permanent magnet motor rotor.
2. The permanent magnet electric machine rotor according to claim 1,
the diameters of the first annular rotor split bodies and the second annular rotor split bodies are the same, the plurality of first slotted portions are uniformly arranged along the circumferential direction, and the plurality of first rotor petal bodies are uniformly distributed.
3. The permanent magnet electric machine rotor according to claim 2,
the number of the rotor lobe bodies of the permanent magnet motor rotor is the same as the number of poles of the permanent magnet motor rotor, and each rotor lobe body is provided with one magnetic steel through groove.
4. A rotor for a permanent magnet electric machine according to claim 3,
the matched with first slot part with the second rotor clack body, perhaps the second slot part with first rotor clack body has the same profile to make adjacent the lateral wall of first rotor clack body with the lateral wall laminating setting of second rotor clack body.
5. The permanent magnet electric machine rotor according to claim 4,
the first rotor lobe and the second rotor lobe have the same structure;
the polarity of the magnetic steel in the first rotor lobe body is opposite to that of the magnetic steel in the second rotor lobe body.
6. The permanent magnet electric machine rotor according to claim 1,
the slotted part is a straight slot or an inclined slot,
when the slotted part is the chute, the inclination direction of the first annular rotor split body is opposite to that of the second annular rotor split body.
7. The permanent magnet electric machine rotor according to any of claims 1 to 6,
and one of the side wall of the adjacent first rotor petal body and the side wall of the adjacent second rotor petal body is provided with a raised step structure, and the other one is provided with a recessed step structure matched with the raised step structure.
8. A magnetizing apparatus adapted to magnetize a rotor split of a permanent magnet motor rotor according to any of claims 1 to 7, characterized in that it comprises:
the magnetizing fixture is provided with a plurality of coil slots;
a magnetizing head which is provided inside the coil slot and can be assembled in the first slot part and/or the second slot part;
magnetizing coils respectively wound in the two adjacent coil slots,
the number of the magnetizing coils is the same as the number of pole pairs of the permanent magnet motor rotor, and the magnetizing heads and the magnetizing clamp are magnetic conductive parts.
9. The magnetizing apparatus of claim 8,
the structure of the magnetic charging head is matched with the slotted part.
10. A method for manufacturing a rotor of a permanent magnet motor, which is suitable for use in the rotor of a permanent magnet motor according to any one of claims 1 to 7, the method comprising:
non-magnetized magnetic steels are respectively inserted into the magnetic steel through grooves of the first annular rotor split body and the magnetic steel through grooves of the second annular rotor split body;
respectively performing magnetizing operation on the first annular rotor split body and the second annular rotor split body by adopting magnetizing equipment;
assembling the first annular rotor split body and the second annular rotor split body after the magnetization along the axial direction in a butt joint matching manner to form the permanent magnet motor rotor with a plurality of magnetic poles,
after the first annular rotor split body and the second annular rotor split body are assembled into the permanent magnet motor rotor, the permanent magnet motor rotor is provided with rotor lobe bodies with the number of poles, and magnetizing magnetic steel in the rotor lobe bodies can emit magnetic fields which are uniformly distributed along the same circumferential direction;
the magnetizing apparatus includes:
the magnetizing fixture is provided with a plurality of coil slots;
a magnetizing head which is provided inside the coil slot and can be assembled in the first slot part and/or the second slot part; or the magnetic charging head is arranged at the inner side of the coil slot and can be assembled in the first slotted part and/or the second slotted part, and the structure of the magnetic charging head is matched with the slotted part;
and the magnetizing coils are respectively wound in the two adjacent coil slots, the number of the magnetizing coils is the same as the number of pole pairs of the permanent magnet motor rotor, and the magnetizing heads and the magnetizing clamp are magnetic conduction pieces.
11. The method for manufacturing a rotor of a permanent magnet motor according to claim 10, wherein the first annular rotor split body and the second annular rotor split body after the completion of the magnetization are assembled in a butt-joint fit manner along an axial direction to form the rotor of the permanent magnet motor, specifically comprising the steps of:
after the first annular rotor split body and the second annular rotor split body are in butt joint and splicing along the axial direction, the first annular rotor split body and the second annular rotor split body are fixedly assembled by adopting an integral injection molding process.
12. The method of claim 10, wherein before the non-magnetized magnetic steel is inserted into the magnetic steel through groove of the first annular rotor split body and the magnetic steel through groove of the second annular rotor split body, the method further comprises:
stamping the annular rotor split body along the circumferential direction by adopting a stamping process to form a rotor end face of the annular rotor split body;
and punching the rotor lobe body of the annular rotor split body along the axial direction to form the first annular rotor split body and the second annular rotor split body respectively.
13. A permanent magnet electric machine, comprising:
a permanent magnet machine rotor according to any of claims 1 to 7;
and the motor stator is sleeved and matched with the permanent magnet motor rotor.
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| CN201810160131.4A CN108418324B (en) | 2018-02-26 | 2018-02-26 | Permanent magnet motor rotor, magnetizing equipment, preparation method and permanent magnet motor |
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| CN201810160131.4A CN108418324B (en) | 2018-02-26 | 2018-02-26 | Permanent magnet motor rotor, magnetizing equipment, preparation method and permanent magnet motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109412296B (en) * | 2018-11-22 | 2023-10-10 | 山东精创磁电产业技术研究院有限公司 | Axial disc type permanent magnet motor rotor assembly and assembly method thereof |
| CN112564350B (en) * | 2019-09-26 | 2022-04-01 | 广东威灵电机制造有限公司 | Motor, household appliance and manufacturing method of motor |
| CN111105918B (en) * | 2019-12-31 | 2022-07-29 | 上海三环磁性材料有限公司 | Compound magnetization device of permanent magnet rotor |
| CN111540562B (en) * | 2020-04-27 | 2021-08-03 | 荆楚理工学院 | Magnetizing device and magnetizing method for rotor of interpolation type permanent magnet synchronous motor |
| CN112953056B (en) * | 2021-01-25 | 2022-09-13 | 格力电器（武汉）有限公司 | Rotor subassembly and have its motor |
| CN114069994A (en) * | 2021-11-10 | 2022-02-18 | 中国航发北京航空材料研究院 | Magnetic field heat treatment device of multi-pole motor rotor |
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| US5786650A (en) * | 1993-02-15 | 1998-07-28 | Fanuc, Ltd. | Rotor for synchronous motor |
| CN104335454A (en) * | 2012-05-24 | 2015-02-04 | 三菱电机株式会社 | Rotor for rotating electric machine, rotating electric machine, and method for manufacturing rotor for rotating electric machine |
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| US20030214194A1 (en) * | 2002-05-20 | 2003-11-20 | General Electric Company | Rotor assembly and method of making |
| US9099905B2 (en) * | 2012-10-15 | 2015-08-04 | Regal Beloit America, Inc. | Radially embedded permanent magnet rotor and methods thereof |
| JP6417665B2 (en) * | 2013-03-21 | 2018-11-07 | 株式会社ジェイテクト | Embedded magnet rotor, manufacturing method of embedded magnet rotor, and orientation magnetizing apparatus |
| CN105119402A (en) * | 2015-09-11 | 2015-12-02 | 广东威灵电机制造有限公司 | Motor rotor and motor therewith |
| CN206932085U (en) * | 2017-07-31 | 2018-01-26 | 广东威灵电机制造有限公司 | Rotor and motor |
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| US5786650A (en) * | 1993-02-15 | 1998-07-28 | Fanuc, Ltd. | Rotor for synchronous motor |
| CN104335454A (en) * | 2012-05-24 | 2015-02-04 | 三菱电机株式会社 | Rotor for rotating electric machine, rotating electric machine, and method for manufacturing rotor for rotating electric machine |
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