CN115473363A - Permanent magnet rotor core assembly and motor rotor - Google Patents
Permanent magnet rotor core assembly and motor rotor Download PDFInfo
- Publication number
- CN115473363A CN115473363A CN202211110514.3A CN202211110514A CN115473363A CN 115473363 A CN115473363 A CN 115473363A CN 202211110514 A CN202211110514 A CN 202211110514A CN 115473363 A CN115473363 A CN 115473363A
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- rotor
- rotor core
- magnetic steel
- grooves
- permanent magnet
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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]
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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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Abstract
The invention discloses a permanent magnet rotor core assembly, which comprises a rotor core punching sheet A, a rotor core punching sheet B, magnetic steel and a pouring thermosetting material, wherein the rotor core punching sheet A, the rotor core punching sheet B, the magnetic steel and the pouring thermosetting material are formed by integrally punching thin silicon steel sheets; a permanent magnet motor rotor comprises at least two groups of permanent magnet rotor core assemblies; the rotor comprises a rotor shaft, a locking nut, two dynamic balance end plates and a plurality of reinforcing rods; the invention solves the problem that the rotor strength and the motor performance of the permanent magnet motor rotor at high speed can not be considered at the same time, and the high performance of the motor is realized while the high speed of the rotor is met; the rotor strength is obviously improved, a part of magnetic bridges are cancelled, and the rotor punching sheets and the magnetic steel are fixed by adopting injection molding materials and inserting reinforcing rods, so that the stress of the magnetic bridges is further reduced, the mechanical strength and the electromagnetic performance are considered, the magnetic leakage is greatly reduced, the torque density is improved, and the power density of the motor is further improved; the asymmetric groove design on the surface of the rotor inhibits torque fluctuation and reduces the NVH noise of the motor.
Description
Technical Field
The invention relates to the technical field of permanent magnet motors, in particular to a permanent magnet rotor core assembly and a motor rotor.
Background
With the rapid development of new energy automobile technology, the performance requirement on the vehicle driving motor is higher and higher, in order to realize the high performance of the motor, the rotating speed of the motor is higher and higher, and the high rotating speed brings greater challenge to the motor structure; as the vehicle driving motor adopts a permanent magnet motor, the magnetic steel is mostly arranged in a built-in way, and a magnetic isolation bridge for fixing the magnetic steel is required on a rotor iron core (in the permanent magnet motor, in order to prevent the magnetic leakage coefficient of the permanent magnet from being too large and the utilization rate of the permanent magnet from being too low, the magnetic isolation measure is adopted, namely the two permanent magnets are isolated by a silicon steel sheet, and the silicon steel sheet between the two permanent magnets is called the magnetic isolation bridge); when the vehicle driving motor runs at a high speed, the rotor generates a larger centrifugal force, and the risk of fatigue fracture of the magnetic isolation bridge due to stress concentration exists; in order to ensure the strength of the rotor, the structural size of the magnetic isolation bridge can be increased, but the magnetic leakage of the motor is also increased, so that the performance such as torque, power factor, efficiency and the like is reduced; at present, the design in the industry can not give consideration to the mechanical strength and the electromagnetic performance of the motor at high speed, and only the electromagnetic performance can be sacrificed to ensure the mechanical strength.
Disclosure of Invention
In order to solve the problems, the invention provides a permanent magnet rotor core assembly, which aims to solve the problem that the rotor strength and the motor performance cannot be considered at the same time when the rotor of the permanent magnet motor at the present is at a high speed, and the high performance of the motor is realized while the high speed of the rotor is met; the rotor strength is obviously improved, a part of magnetic isolation bridges are cancelled, and the rotor punching sheets and the magnetic steel are fixed by adopting injection molding materials and inserting reinforcing rods, so that the stress of the magnetic isolation bridges is further reduced, the mechanical strength and the electromagnetic performance are considered, the magnetic leakage is greatly reduced, the torque density is improved, and the power density of the motor is further improved; the asymmetric groove design on the surface of the rotor inhibits torque fluctuation and reduces the NVH noise of the motor.
The invention discloses a permanent magnet rotor core assembly, which comprises a rotor core punching sheet A and a rotor core punching sheet B which are integrally formed by punching thin silicon steel sheets, and also comprises magnetic steel and a pouring thermosetting material;
the rotor core stamped sheet A and the rotor core stamped sheet B are uniformly distributed with V-shaped magnetic steel accommodating grooves in the circumferential direction, the V-shaped magnetic steel accommodating groove A of the rotor core stamped sheet A is a V-shaped magnetic steel accommodating groove without an internal magnetic isolation bridge, the V-shaped magnetic steel accommodating groove B of the rotor core stamped sheet B is a V-shaped magnetic steel accommodating groove containing the internal magnetic isolation bridge, the rotor core assembly is composed of the rotor core stamped sheet A and the core stamped sheet B clamped and fixed in the rotor core stamped sheet A, the V-shaped magnetic steel accommodating groove of the rotor core stamped sheet A does not contain the internal magnetic isolation bridge, the V-shaped magnetic steel accommodating groove of the rotor core stamped sheet B contains the internal magnetic isolation bridge, and the structure that the rotor core stamped sheet A is arranged at two ends and the rotor core stamped sheet B is clamped in the middle is adopted, so that magnetic leakage is greatly reduced, torque density is improved, and power density of the motor is further improved;
the magnetic steel is embedded into the two side groove walls of each V-shaped magnetic steel accommodating groove in the circumferential direction in a cylindrical space formed by laminating the rotor iron core stamped sheet A and the rotor iron core stamped sheet B, each V-shaped magnetic steel accommodating groove is embedded into the cylindrical space formed by laminating the rotor iron core stamped sheet A and the rotor iron core stamped sheet B in an axially extending manner, and the encapsulating thermosetting material is respectively encapsulated into the magnetic steel accommodating grooves at the two ends of each magnetic steel in the cylindrical space formed by laminating the rotor iron core stamped sheet A and the rotor iron core stamped sheet B; the central position of rotor core towards piece A and rotor core towards piece B has seted up shaft hole A and shaft hole B respectively to supply the rotor shaft to wear to establish and cup joint in it.
The magnetic isolation bridge of the outer ring surface of the rotor iron core punching sheet A and the rotor iron core punching sheet B corresponding to the magnetic pole at the upper end of each magnetic steel is provided with an axial long groove A and a long groove B, one side of a central perpendicular line between two magnetic poles adjacent to the lower end of the magnetic steel is respectively provided with an axial asymmetric long groove A and an axial asymmetric long groove B in the outer ring surface of the rotor iron core punching sheet A and the rotor iron core punching sheet B corresponding to the V-shaped magnetic steel accommodating groove, the grooves and the asymmetric grooves have the effect of better forming an asymmetric air gap between the motor rotor and the motor stator, and the effect of reducing NVH (Noise, noise Vibration, harshness) Noise of the motor is better.
The middle of the permanent magnet rotor core assembly is formed by laminating 2N rotor core punching sheets B, wherein asymmetric long grooves B of the N rotor core punching sheets B and asymmetric long grooves B of the other N rotor core punching sheets B are distributed on two sides of a perpendicular line of the center of a magnetic pole in a mirror symmetry manner, and the staggered structure of the asymmetric long grooves is used for keeping the balance of force, so that an uneven air gap can be formed between a motor rotor and a motor stator, and the NVH noise is reduced; the number N of the rotor core punching sheets B is a positive integer.
The two sides of the 2N rotor core laminations B are respectively laminated with M rotor core laminations A, wherein the asymmetric long grooves A of the M rotor core laminations A on each side and the asymmetric long grooves B of the N adjacent laminated rotor core laminations B are distributed on the same side of the center line of a magnetic pole, so that the strength of each group of rotor core assemblies is increased; the number M of the rotor core laminations A is a positive integer, and the number M of the rotor core laminations A is larger than the number N of the rotor core laminations B.
The rotor core punching sheet A is circumferentially and symmetrically provided with an inner layer and an outer layer of V-shaped magnetic steel accommodating grooves A, and each V-shaped magnetic steel accommodating groove A is formed by integrally compression-molded upper-end left and right wall injection molding grooves A, left and right wall magnetic steel insertion grooves A and a lower end thermosetting filling groove A; the left and right wall injection molding grooves A at the upper end are respectively and correspondingly communicated with the upper ends of the left and right wall magnetic steel insertion grooves A, two ends of the lower end thermosetting filling groove A are respectively and correspondingly communicated with the lower ends of the left and right wall magnetic steel insertion grooves A, the communicated lower end thermosetting filling groove A is arranged between the two magnetic steels instead of a silicon steel sheet, a magnetic bridge at the position is cancelled, the stress of the magnetic bridge is reduced, the magnetic steels are respectively matched and embedded into the left and right wall magnetic steel insertion grooves A, and the filling thermosetting material is respectively filled into the left and right wall injection molding grooves A at the upper end and the lower end thermosetting filling groove A; and reinforcing rod accommodating holes A are formed in the rotor core stamped sheets A above the thermosetting encapsulation grooves A at the lower ends of the V-shaped magnetic steel accommodating grooves A, so that a plurality of groups of rotor core assemblies can penetrate through the reinforcing rods after being superposed to form a squirrel cage structure, and the strength of the motor rotor at all the V-shaped magnetic steel accommodating grooves A is increased.
The rotor core punching sheet B is characterized in that inner and outer layers of V-shaped magnetic steel accommodating grooves B are uniformly and symmetrically distributed in the circumferential direction of the rotor core punching sheet B, and each V-shaped magnetic steel accommodating groove B is formed by integrally compression-molded upper-end left and right wall injection molding grooves B, left and right wall magnetic steel insertion grooves B and lower-end left and right wall thermosetting encapsulation grooves B; the left and right wall injection molding grooves B at the upper end are respectively and correspondingly communicated with the upper ends of the left and right wall magnetic steel insertion grooves B, the left and right wall thermosetting pouring grooves B at the lower end are respectively and correspondingly communicated with the corresponding lower ends of the left and right wall magnetic steel insertion grooves B, the adjacent ends of the left and right wall thermosetting pouring grooves B at the lower end are separated by silicon steel sheets to form a magnetic isolation bridge, the silicon steel sheets are arranged between the two magnetic steels, the magnetic isolation bridge is arranged, the magnetic steels are respectively matched and embedded into the left and right wall magnetic steel insertion grooves B in order to prevent the magnetic leakage coefficient of the permanent magnet from being overlarge, and the pouring thermosetting material is respectively poured into the left and right wall injection molding grooves B at the upper end and the left and right wall thermosetting pouring grooves B at the lower end; and reinforcing rod accommodating holes B are formed in the rotor core stamped sheets B above the magnetic isolation bridge between the left wall and the right wall of the lower end of each V-shaped magnetic steel accommodating groove B, so that a plurality of groups of rotor core assemblies penetrate through the reinforcing rods to form a squirrel cage structure after being superposed, and the strength of the motor rotor at all V-shaped magnetic steel accommodating grooves B is increased.
The application also provides a motor rotor, which comprises at least two groups of permanent magnet rotor core assemblies; the rotor shaft is connected with the two dynamic balance end plates through the two reinforcing rods;
the at least two groups of permanent magnet rotor iron core assemblies are superposed and sleeved on the rotor shaft, the two dynamic balance end plates are also respectively sleeved on the rotor shaft, the two dynamic balance end plates are respectively attached to two end faces of the at least two groups of permanent magnet rotor iron core assemblies superposed with each other, and a shaft shoulder at one end of the rotor shaft and a locking nut screwed at the other end of the rotor shaft are used for screwing and fixing the two dynamic balance end plates and the at least two groups of permanent magnet rotor iron core assemblies;
the reinforcing rods are respectively accommodated in the reinforcing rod accommodating holes A and the reinforcing rod accommodating holes B which are axially overlapped in the at least two groups of permanent magnet rotor iron core assemblies, two ends of each reinforcing rod penetrate through and are accommodated and fixed on the two dynamic balance end plates respectively, the two dynamic balance end plates and the plurality of reinforcing rods which are circumferentially penetrated and fixed form a squirrel cage structure, the overall strength of the rotor is improved, and therefore the stress of the magnetic isolation bridge is further reduced.
A rotor shaft end plate shaft hole is formed in the center of each dynamic balance end plate, a rotor shaft is fixedly sleeved on the rotor shaft end plate shaft hole, and left and right injection molding grooves B at the upper end, left and right thermosetting pouring grooves B at the lower end and left and right thermosetting pouring grooves B at the lower end of each V-shaped magnetic steel containing groove B on a rotor core stamped sheet B and an end plate reinforcing rod containing hole are respectively formed in the positions of each dynamic balance end plate corresponding to the left and right injection molding grooves B at the upper end of each V-shaped magnetic steel containing groove B and each reinforcing rod containing hole B; the encapsulation thermosetting material is respectively poured into the left and right encapsulation holes at the upper end of the end plate and the left and right encapsulation holes at the lower end of the end plate, each reinforcing rod is respectively accommodated and fixed in each reinforcing rod accommodating hole of the end plate, and the encapsulation thermosetting material and the reinforcing rods enhance the integral strength of the rotor, so that silicon steel sheets near the V-shaped magnetic steel accommodating groove cannot break and fall off from the rotor iron core stamped sheet A and the rotor iron core stamped sheet B due to the stress of the magnetic isolation bridge when the rotor rotates in the stator at a high speed, and the driving motor is damaged; two rings of stiffeners that the magnet steel storage tank A of two-layer inside and outside V style of calligraphy and the magnet steel storage tank B upper portion of V style of calligraphy were worn to establish set up the direction and are parallel with the axial, rather than run through the magnet steel storage tank of two-layer V style of calligraphy, just can not cut off the magnetic circuit of reluctance torque, have guaranteed that the magnetic circuit of reluctance torque is unblocked, and the performance promotes.
Every lower extreme thermosetting encapsulating groove A of rotor core towards piece A and every right lower extreme left side of rotor core towards piece B, right wall thermosetting encapsulating groove B wholly are the little tripe of mouth big concave character structure, stiffener holding hole A and stiffener holding hole B set up respectively in the concave character structure that corresponds, one of the purpose of setting up of concave character structure is carried on spacingly to the left and right wall magnet steel insert inslot embedding magnet steel lower extreme, the second of the purpose plays the effect of strengthening rib and increases the intensity of the magnet steel storage tank circumference silicon steel sheet of V style of calligraphy, prevent that the silicon steel sheet from leading to the fracture because of stress.
The reinforcing rod is made of a non-magnetic and non-conductive non-metallic material, the reinforcing rod is made of a PEEK (polyether ether ketone) material, a PC (polycarbonate) material, an acrylic material or a bakelite plate, and the reinforcing rod is made of an insulating and non-magnetic material, so that the problems of serious heating and low efficiency caused by eddy current loss are solved; the encapsulating thermosetting material is a non-magnetic and non-conductive high-strength injection Molding material, and the encapsulating thermosetting material is an EMC material (Epoxy Molding Compound ).
Advantageous effects
The invention solves the problem that the rotor strength and the motor performance of the permanent magnet motor rotor at high speed can not be considered at the same time, and the high performance of the motor is realized while the high speed of the rotor is met; the rotor strength is obviously improved, a part of magnetic bridges are cancelled, and the rotor punching sheets and the magnetic steel are fixed by adopting injection molding materials and inserting reinforcing rods, so that the stress of the magnetic bridges is further reduced, the mechanical strength and the electromagnetic performance are considered, the magnetic leakage is greatly reduced, the torque density is improved, and the power density of the motor is further improved; the asymmetric groove design on the surface of the rotor inhibits torque fluctuation and reduces the NVH noise of the motor.
Drawings
Fig. 1 is a schematic view of the overall structure of a permanent magnet rotor core assembly according to the present invention.
Fig. 2 is a schematic front view of a permanent magnet rotor core assembly according to the present invention.
Fig. 3 is a schematic structural view of a rotor core segment a according to the present invention.
Fig. 4 is a schematic structural view of a rotor core sheet B according to the present invention.
Fig. 5 is a schematic view of the overall structure of the rotor of the motor of the present invention.
Fig. 6 is a schematic view of the overall cross-sectional structure of the rotor of the motor of the present invention.
Fig. 7 is a schematic view of the dynamic balance end plate structure of the invention.
Fig. 8 is a partial structure schematic diagram of the motor rotor of the invention.
In the figure:
1. a permanent magnet rotor core assembly;
11. a rotor core punching sheet A;
111. a V-shaped magnetic steel accommodating groove A;
1111. the left and right walls of the upper end are provided with injection molding grooves A;
1112. the left and right wall magnetic steel is inserted into the slot A;
1113. the lower end is provided with a thermosetting pouring groove A;
1114. a stiffener receiving hole A;
1115. a long groove A;
1116. an asymmetric long groove A;
112. the shaft hole A;
12. a rotor core sheet B;
121. a V-shaped magnetic steel accommodating groove B;
1211. the left and right walls at the upper end are provided with injection molding grooves B;
1212. the left and right wall magnetic steel insertion grooves B;
1213. the left and right walls of the lower end are thermosetting filled and sealed with a groove B;
1214. a stiffener receiving hole B;
1215. a long groove B;
1216. an asymmetric long groove B;
122. a shaft hole B;
13. magnetic steel;
14. encapsulating a thermosetting material;
2. a rotor shaft;
21. a shaft shoulder;
3. locking the nut;
4. two dynamic balance end plates;
41. a rotor shaft end plate shaft hole;
42. the left and right filling and sealing holes at the upper end of the end plate;
43. the hole is filled and sealed on the left and the right of the lower end of the end plate;
44. end plate stiffener receiving holes;
5. a reinforcing rod.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 to 4, a permanent magnet rotor core assembly 1 includes a rotor core stamped sheet a11 and a rotor core stamped sheet B12 integrally formed by thin silicon steel sheets, and further includes a magnetic steel 13 and a potting thermosetting material 14;
the rotor iron core stamped sheets A11 and the rotor iron core stamped sheets B12 are uniformly distributed with V-shaped magnetic steel accommodating grooves in the circumferential direction, the V-shaped magnetic steel accommodating grooves A111 of the rotor iron core stamped sheets A11 are V-shaped magnetic steel accommodating grooves without internal magnetic isolation bridges, the V-shaped magnetic steel accommodating grooves B121 of the rotor iron core stamped sheets B12 are V-shaped magnetic steel accommodating grooves containing internal magnetic isolation bridges, and the rotor iron core stamped sheets B12 are clamped between the rotor iron core stamped sheets A11;
the magnetic steel 13 is embedded into two side groove walls of each V-shaped magnetic steel accommodating groove in the circumferential direction in a cylindrical space formed by laminating the rotor core stamped sheet A11 and the rotor core stamped sheet B12, each V-shaped magnetic steel accommodating groove is fully embedded in the cylindrical space formed by laminating the rotor core stamped sheet A11 and the rotor core stamped sheet B12 in an axially extending manner, and the encapsulating thermosetting material 14 is respectively encapsulated in the magnetic steel accommodating grooves at two ends of each magnetic steel 13 in the cylindrical space formed by laminating the rotor core stamped sheet A11 and the rotor core stamped sheet B12; the central positions of the rotor core stamped piece a11 and the rotor core stamped piece B12 are respectively provided with a shaft hole a112 and a shaft hole B122.
The outer ring surfaces of the rotor core stamped piece A11 and the rotor core stamped piece B12 are provided with an axial long groove A113 and an axial long groove B123 corresponding to a magnetic separation bridge of a magnetic pole at the upper end of each magnetic steel 13, and the outer ring surfaces of the rotor core stamped piece A11 and the rotor core stamped piece B12 are provided with an axial asymmetric long groove A1116 and an asymmetric long groove B1216 corresponding to one side of a central perpendicular line between two magnetic poles adjacent to the lower end of the magnetic steel 13 in a V-shaped magnetic steel accommodating groove.
The middle of the permanent magnet rotor core assembly 1 is formed by laminating 2N rotor core laminations B12, wherein the asymmetric long grooves B1216 of the N rotor core laminations B12 and the asymmetric long grooves B1216 of the other N rotor core laminations B12 are distributed on two sides of a perpendicular line of the center of a magnetic pole in a mirror symmetry manner; the number N of the rotor core punching sheets B12 is a positive integer.
The two sides of 2N rotor core laminations B12 are respectively laminated with M rotor core laminations A11, wherein the asymmetric long groove A1116 of each M rotor core laminations A11 on each side and the asymmetric long groove B1216 of the adjacent laminated N rotor core laminations B12 are distributed on the same side of the center line of the magnetic pole; the number M of the rotor core laminations A11 is a positive integer, and the number M of the rotor core laminations A11 is larger than the number N of the rotor core laminations B12.
An inner layer and an outer layer of V-shaped magnetic steel accommodating grooves A111 are uniformly and symmetrically distributed in the circumferential direction of the rotor iron core stamped sheet A11, and each V-shaped magnetic steel accommodating groove A111 is formed by integrally compression-molded upper-end left and right wall injection molding grooves A1111, left and right wall magnetic steel insertion grooves A1112 and a lower end thermosetting encapsulation groove A1113; the left and right injection molding grooves A1111 at the upper end are respectively correspondingly communicated with the upper end of the left and right magnetic steel insertion grooves A1112, the two ends of the thermosetting encapsulation groove A1113 at the lower end are respectively correspondingly communicated with the lower end of the left and right magnetic steel insertion grooves A1112, the magnetic steel 13 is respectively embedded into the left and right magnetic steel insertion grooves A1112 in a matching way, and the thermosetting encapsulation material 14 is respectively injected into the left and right injection molding grooves A1111 at the upper end and the thermosetting encapsulation groove A1113 at the lower end; a reinforcing rod accommodating hole A1114 is formed in the rotor core stamped sheet A11 above the thermosetting encapsulation groove A1113 at the lower end of each V-shaped magnetic steel accommodating groove A111.
An inner layer and an outer layer of V-shaped magnetic steel accommodating grooves B121 are uniformly and symmetrically distributed on the circumferential direction of the rotor iron core stamped sheet B12, and each V-shaped magnetic steel accommodating groove B121 is formed by integrally compression-molded upper-end left and right wall injection molding grooves B1211, left and right wall magnetic steel inserting grooves B1212 and lower-end left and right wall thermosetting encapsulation grooves B1213; the left and right injection molding grooves B1211 at the upper end are respectively and correspondingly communicated with the upper ends of the left and right magnetic steel insertion grooves B1212, the left and right thermosetting pouring grooves B1213 at the lower end are respectively and correspondingly communicated with the lower ends corresponding to the left and right magnetic steel insertion grooves B1212, the adjacent ends of the left and right thermosetting pouring grooves B1213 at the lower end are separated by silicon steel sheets to form a magnetic isolation bridge, the magnetic steel 13 is respectively embedded into the left and right magnetic steel insertion grooves B1212 in a matching way, and the pouring thermosetting material 14 is respectively poured into the left and right injection molding grooves B1211 at the upper end and the left and right thermosetting pouring grooves B1213 at the lower end; and a reinforcing rod containing hole B1214 is formed in the rotor core stamped sheet B12 above the magnetic isolation bridge between the left wall and the right wall of the lower left and right wall thermosetting encapsulating grooves B1213 of each V-shaped magnetic steel containing groove B121.
Example 2
Referring to fig. 1 to 8, a rotor of a permanent magnet motor, which is different from embodiment 1,
comprises four groups of permanent magnet rotor iron core assemblies 1; the rotor comprises a rotor shaft 2, a locking nut 3, two dynamic balance end plates 4 and a plurality of reinforcing rods 5;
four groups of permanent magnet rotor iron core assemblies 1 are superposed and sleeved on a rotor shaft 2, two dynamic balance end plates 4 are also respectively sleeved on the rotor shaft 2, the two dynamic balance end plates 4 are respectively attached to two end faces of the four groups of permanent magnet rotor iron core assemblies 1 superposed with each other, a shaft shoulder 21 at one end of the rotor shaft 2 and a locking nut 3 screwed at the other end of the rotor shaft 2 are used for screwing and fixing the two dynamic balance end plates 4 and the four groups of permanent magnet rotor iron core assemblies 1;
sixteen reinforcing rods 5 are respectively and uniformly penetrated and accommodated in at least two groups of permanent magnet rotor core assemblies 1, and two ends of each reinforcing rod 5 are respectively penetrated and accommodated and fixed on two dynamic balance end plates 4.
Sixteen reinforcing rods 5 are respectively accommodated in reinforcing rod accommodating holes a1114 and reinforcing rod accommodating holes B1214 which are axially overlapped in the four groups of permanent magnet rotor core assemblies 1; a rotor shaft end plate shaft hole 41 is formed in the center of each dynamic balance end plate 4, the rotor shaft 2 is fixedly sleeved on the rotor shaft end plate shaft hole 41, and left and right injection molding grooves B1211 and left and right thermosetting pouring grooves B1213 at the upper end, left and right pouring holes 43 and an end plate reinforcing rod containing hole 44 at the lower end of the end plate are respectively formed in the positions, corresponding to each V-shaped magnetic steel containing groove B121 on the rotor core stamped sheet B12, of each dynamic balance end plate 4 and each reinforcing rod containing hole B1214; the potting thermosetting material 14 is respectively poured into the left and right potting holes 42 at the upper end of the end plate and the left and right potting holes 43 at the lower end of the end plate, and each reinforcing rod 5 is respectively accommodated and fixed in each reinforcing rod accommodating hole 44 of the end plate.
Each lower end thermosetting encapsulating groove A1113 of the rotor core punching sheet A11 and each pair of lower end left and right wall thermosetting encapsulating grooves B1213 of the rotor core punching sheet B12 are integrally of a concave structure with a small opening and a big belly, and the reinforcing rod containing hole A1114 and the reinforcing rod containing hole B1214 are respectively arranged in the corresponding concave structures.
The reinforcing rod 5 is made of a non-magnetic and non-conductive non-metallic material, and the reinforcing rod 5 is made of a PEEK material; the encapsulating thermosetting material 14 is made of a non-magnetic and non-conductive high-strength injection molding material, and the encapsulating thermosetting material 14 is made of an EMC material.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A permanent magnet rotor core assembly is characterized in that: the rotor core punching sheet comprises a rotor core punching sheet A (11), a rotor core punching sheet B (12), magnetic steel (13) and encapsulating thermosetting material (14), wherein the rotor core punching sheet A, the rotor core punching sheet B and the encapsulating thermosetting material are integrally formed by thin silicon steel sheets in a punching mode;
the rotor core stamped sheet A (11) and the rotor core stamped sheet B (12) are uniformly distributed with V-shaped magnetic steel accommodating grooves in the circumferential direction, the V-shaped magnetic steel accommodating groove A (111) of the rotor core stamped sheet A (11) is a V-shaped magnetic steel accommodating groove without an internal magnetic isolation bridge, the V-shaped magnetic steel accommodating groove B (121) of the rotor core stamped sheet B (12) is a V-shaped magnetic steel accommodating groove containing an internal magnetic isolation bridge, and the rotor core stamped sheet B (12) is clamped between the rotor core stamped sheet A (11) and the rotor core stamped sheet B (12);
the magnetic steel (13) is embedded into two side groove walls of each V-shaped magnetic steel accommodating groove in the circumferential direction in a cylindrical space formed by laminating the rotor iron core punching sheet A (11) and the rotor iron core punching sheet B (12), each V-shaped magnetic steel accommodating groove is embedded into the cylindrical space formed by laminating the rotor iron core punching sheet A (11) and the rotor iron core punching sheet B (12) in an axially extending manner, and the encapsulating thermosetting material (14) is respectively encapsulated into the magnetic steel accommodating grooves at two ends of each magnetic steel (13) in the cylindrical space formed by laminating the rotor iron core punching sheet A (11) and the rotor iron core punching sheet B (12); the center positions of the rotor core punching sheet A (11) and the rotor core punching sheet B (12) are respectively provided with a shaft hole A (112) and a shaft hole B (122).
2. A permanent magnet rotor core assembly according to claim 1, wherein: the magnetic separation bridge position of the outer ring surfaces of the rotor iron core punching sheet A (11) and the rotor iron core punching sheet B (12) corresponding to the magnetic poles at the upper end of each magnetic steel is provided with an axial long groove A (1115) and a long groove B (1215), and the outer ring surfaces of the rotor iron core punching sheet A (11) and the rotor iron core punching sheet B (12) corresponding to the magnetic pole at the lower end of the two adjacent magnetic steels (13) in the V-shaped magnetic steel accommodating groove are respectively provided with an axial asymmetric long groove A (1116) and an asymmetric long groove B (1216) at one side of a central perpendicular line.
3. A permanent magnet rotor core assembly according to claim 2, wherein: the middle of the permanent magnet rotor core assembly (1) is formed by laminating 2N rotor core punching sheets B (12), wherein asymmetric long grooves B (1216) of the N rotor core punching sheets B (12) and asymmetric long grooves B (1216) of the other N rotor core punching sheets B (12) are distributed on two sides of a perpendicular line of the center of a magnetic pole in a mirror symmetry mode; the number N of the rotor core punching sheets B (12) is a positive integer.
4. A permanent magnet rotor core assembly according to claim 3, wherein: m rotor core laminations A (11) are respectively laminated on two sides of 2N rotor core laminations B (12), wherein an asymmetric long groove A (1116) of the M rotor core laminations A (11) on each side and an asymmetric long groove B (1216) of the N adjacent laminated rotor core laminations B (12) are distributed on the same side of the center line of a magnetic pole; the number M of the rotor core laminations A (11) is a positive integer, and the number M of the rotor core laminations A (11) is larger than the number N of the rotor core laminations B (12).
5. A permanent magnet rotor core assembly according to claim 2, wherein: an inner layer and an outer layer of V-shaped magnetic steel accommodating grooves A (111) are uniformly and symmetrically distributed in the circumferential direction of the rotor iron core stamped sheet A (11), and each V-shaped magnetic steel accommodating groove A (111) is formed by integrally compression-molded upper-end left and right wall injection molding grooves A (1111), left and right wall magnetic steel inserting grooves A (1112) and a lower-end thermosetting pouring groove A (1113); the left and right injection molding grooves A (1111) at the upper end are respectively and correspondingly communicated with the upper ends of the left and right magnetic steel insertion grooves A (1112), the two ends of the lower thermosetting pouring groove A (1113) are respectively and correspondingly communicated with the lower ends of the left and right magnetic steel insertion grooves A (1112), the magnetic steel (13) is respectively embedded into the left and right magnetic steel insertion grooves A (1112) in a matching way, and the pouring thermosetting material (14) is respectively poured into the left and right injection molding grooves A (1111) at the upper end and the lower thermosetting pouring groove A (1113) at the lower end; and a reinforcing rod accommodating hole A (1114) is formed in the rotor core stamped sheet A (11) above the lower end thermosetting encapsulation groove A (1113) of each V-shaped magnetic steel accommodating groove A (111).
6. A permanent magnet rotor core assembly according to claim 2, wherein: the rotor core stamped steel B (12) is circumferentially and symmetrically provided with inner and outer V-shaped magnetic steel accommodating grooves B (121), and each V-shaped magnetic steel accommodating groove B (121) is composed of an upper left wall and right wall injection molding groove B (1211), a left wall and right wall magnetic steel inserting groove B (1212) and a lower left wall and right wall thermosetting filling sealing groove B (1213) which are integrally molded; the left and right injection molding grooves B (1211) at the upper end are respectively and correspondingly communicated with the upper ends of the left and right magnetic steel insertion grooves B (1212), the left and right thermosetting filling and sealing grooves B (1213) at the lower ends are respectively and correspondingly communicated with the corresponding lower ends of the left and right magnetic steel insertion grooves B (1212), the adjacent ends of the left and right thermosetting filling and sealing grooves B (1213) at the lower ends are separated by silicon steel sheets to form a magnetic isolation bridge, the magnetic steel (13) is respectively embedded into the left and right magnetic steel insertion grooves B (1212) in a matching way, and the filling and sealing thermosetting material (14) is respectively filled into the left and right injection molding grooves B (1211) at the upper end and the left and right thermal filling and sealing grooves B (1213) at the lower ends; and a reinforcing rod accommodating hole B (1214) is formed in the rotor core stamped sheet B (12) above the magnetic isolation bridge between the left wall and the right wall of the lower end of each V-shaped magnetic steel accommodating groove B (121) and the right wall thermosetting encapsulating groove B (1213).
7. A permanent magnet motor rotor characterized in that: comprising at least two groups of permanent magnet rotor core assemblies (1) according to any of claims 1-6; the rotor comprises a rotor shaft (2), a locking nut (3), two dynamic balance end plates (4) and a plurality of reinforcing rods (5);
at least two groups of permanent magnet rotor iron core assemblies (1) are superposed and sleeved on a rotor shaft (2), two dynamic balance end plates (4) are also respectively sleeved on the rotor shaft (2), the two dynamic balance end plates (4) are respectively attached to two end faces of the at least two groups of permanent magnet rotor iron core assemblies (1) superposed with each other, and a shaft shoulder (21) at one end of the rotor shaft (2) and a locking nut (3) screwed at the other end of the rotor shaft (2) are used for screwing and fixing the two dynamic balance end plates (4) and the at least two groups of permanent magnet rotor iron core assemblies (1);
the reinforcing rods (5) are respectively and uniformly penetrated and accommodated in the at least two groups of permanent magnet rotor iron core assemblies (1), and two ends of each reinforcing rod (5) are respectively penetrated, accommodated and fixed on the two dynamic balance end plates (4).
8. A permanent magnet machine rotor according to claim 7, characterized in that: the plurality of reinforcing rods (5) are respectively accommodated in reinforcing rod accommodating holes A (1114) and reinforcing rod accommodating holes B (1214) which are axially overlapped in at least two groups of permanent magnet rotor iron core assemblies (1); a rotor shaft end plate shaft hole (41) is formed in the center of each dynamic balance end plate (4), a rotor shaft (2) is fixedly connected to the rotor shaft end plate shaft hole (41) in a sleeved mode, and left and right wall injection molding grooves B (1211) at the upper end, left and right wall thermosetting filling grooves B (1213) at the lower end and reinforcing rod containing holes B (1214) at the positions, corresponding to each V-shaped magnetic steel containing groove B (121) on the rotor iron core stamped steel B (12), of each dynamic balance end plate (4) are respectively provided with left and right filling holes (42) at the upper end of the end plate, left and right filling holes (43) at the lower end of the end plate and reinforcing rod containing holes (44) of the end plate; the potting thermosetting material (14) is respectively poured into the left and right potting holes (42) at the upper end of the end plate and the left and right potting holes (43) at the lower end of the end plate, and each reinforcing rod (5) is respectively accommodated and fixed in each reinforcing rod accommodating hole (44) of the end plate.
9. A permanent magnet machine rotor according to claim 8, characterized in that: each lower end thermosetting pouring groove A (1113) of the rotor core stamped sheet A (11) and each pair of lower end left and right wall thermosetting pouring grooves B (1213) of the rotor core stamped sheet B (12) are integrally of a concave structure with a small opening and a big belly, and the reinforcing rod containing hole A (1114) and the reinforcing rod containing hole B (1214) are respectively arranged in the corresponding concave structures.
10. A permanent magnet machine rotor according to claim 9, characterized in that: the reinforcing rod (5) is made of non-magnetic and non-conductive non-metallic materials, and the reinforcing rod (5) is made of PEEK materials, PC materials, acrylic materials or bakelite plates; the encapsulating thermosetting material (14) is made of a non-magnetic and non-conductive high-strength injection molding material, and the encapsulating thermosetting material (14) is made of an EMC material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211110514.3A CN115473363A (en) | 2022-09-13 | 2022-09-13 | Permanent magnet rotor core assembly and motor rotor |
| PCT/CN2023/093037 WO2024055610A1 (en) | 2022-09-13 | 2023-05-09 | Permanent magnet rotor core assembly, and electric motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211110514.3A CN115473363A (en) | 2022-09-13 | 2022-09-13 | Permanent magnet rotor core assembly and motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115473363A true CN115473363A (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211110514.3A Pending CN115473363A (en) | 2022-09-13 | 2022-09-13 | Permanent magnet rotor core assembly and motor rotor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115473363A (en) |
| WO (1) | WO2024055610A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055610A1 (en) * | 2022-09-13 | 2024-03-21 | 中国第一汽车股份有限公司 | Permanent magnet rotor core assembly, and electric motor rotor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4160469B2 (en) * | 2003-07-17 | 2008-10-01 | 日産自動車株式会社 | Manufacturing method of rotor core steel plate |
| CN107437856A (en) * | 2016-05-27 | 2017-12-05 | 比亚迪股份有限公司 | Rotor, motor and electric automobile |
| CN106787316A (en) * | 2016-12-22 | 2017-05-31 | 温岭市九洲电机制造有限公司 | A kind of lamination structure of magneto |
| CN114069921B (en) * | 2020-07-31 | 2023-04-18 | 安徽威灵汽车部件有限公司 | Rotor punching sheet, rotor core, rotor, motor and vehicle |
| CN216216145U (en) * | 2021-11-04 | 2022-04-05 | 天津松正汽车部件有限公司 | Permanent magnet synchronous motor rotor punching sheet structure, rotor and motor thereof |
| CN115473363A (en) * | 2022-09-13 | 2022-12-13 | 中国第一汽车股份有限公司 | Permanent magnet rotor core assembly and motor rotor |
-
2022
- 2022-09-13 CN CN202211110514.3A patent/CN115473363A/en active Pending
-
2023
- 2023-05-09 WO PCT/CN2023/093037 patent/WO2024055610A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055610A1 (en) * | 2022-09-13 | 2024-03-21 | 中国第一汽车股份有限公司 | Permanent magnet rotor core assembly, and electric motor rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024055610A1 (en) | 2024-03-21 |
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