CN113675967A - Rotor punching sheet, rotor, motor and compressor - Google Patents

Rotor punching sheet, rotor, motor and compressor Download PDF

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Publication number
CN113675967A
CN113675967A CN202010403459.1A CN202010403459A CN113675967A CN 113675967 A CN113675967 A CN 113675967A CN 202010403459 A CN202010403459 A CN 202010403459A CN 113675967 A CN113675967 A CN 113675967A
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China
Prior art keywords
rotor
sub
arc
magnetic
pole
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Granted
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CN202010403459.1A
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CN113675967B (en
Inventor
王鲁
张祯海
王司暾
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Shanghai Highly Electrical Appliances Co Ltd
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Shanghai Highly Electrical Appliances Co Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
    • 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]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/021—Means for mechanical adjustment of the excitation flux
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The invention discloses a rotor punching sheet, which is designed into a rotor punching sheet with three sections of external diameters on the basis of a uniform and regular round rotor punching sheet in the prior art, and the radius of each section of sub-pole arc and the corresponding arc angle are reasonably designed. The V-shaped magnet slots can be arranged on the rotor punching sheet, and the angle parameters of the V-shaped magnet slots are optimized, so that the using amount of the permanent magnets embedded into the rotor punching sheet is obviously increased compared with the prior art, the torque density of the motor is increased, and the back electromotive force of the motor and the efficiency of the motor are effectively improved.

Description

Rotor punching sheet, rotor, motor and compressor
Technical Field
The invention relates to the technical field of compressors, in particular to a rotor punching sheet, a rotor, a motor and a compressor.
Background
The compressor is a core device of an electric appliance such as an air conditioner, a refrigerator and the like, and most of the compressors are driven by a motor and have high energy consumption. With the progress of society and the continuous and severe energy situation, related industries are more and more dedicated to the promotion of some energy-saving and consumption-reducing products. In recent years, the dc frequency conversion technology has become one of the main driving technologies in the refrigeration industry, and at the same time, the permanent magnet synchronous motor has also become the first choice for the motor for the compressor. The permanent magnet synchronous motor for the direct current frequency conversion compressor consists of a stator and a rotor, wherein the stator is fixed in the compressor, the rotor in the compressor is provided with a permanent magnet, and parts such as a piston and the like are driven by using the design of an eccentric shaft to carry out the compression process of a refrigerant.
The existing permanent magnet synchronous motor rotor is generally formed by laminating round punching sheets with uniform and regular shapes, and a magnetic isolation trimming design is arranged between two adjacent rotor magnetic poles on part of the punching sheets of the rotor. The rotor formed by the rotor punching sheet in the form usually generates various harmonics of different orders in the air gap between the stator and the rotor, so that the sine of the back electromotive force waveform of the motor is reduced, and meanwhile, the torque pulsation and the noise are increased.
Therefore, it is necessary to provide a scheme that can effectively reduce torque ripple and noise.
Disclosure of Invention
The invention aims to provide a rotor punching sheet, a rotor, a motor and a compressor, which are used for solving the problems that the torque pulsation and the noise of the motor are large in the rotor punching sheet structure in the prior art.
In order to solve the technical problem, the invention provides a rotor punching sheet, which comprises a rotor punching sheet body, wherein the rotor punching sheet body is provided with a plurality of rotor magnetic poles, and the arc-shaped part of each rotor magnetic pole, which corresponds to the periphery of the rotor punching sheet body, is a magnetic pole arc;
each magnetic pole polar arc comprises a first sub polar arc, a second sub polar arc and two third sub polar arcs, one end of the first sub polar arc is connected with one end of the second sub polar arc, the other end of the first sub polar arc is connected with one end of one of the third sub polar arcs, and the other end of the second sub polar arc is connected with one end of the other third sub polar arc;
the centers of the first sub-pole arc, the second sub-pole arc and the third sub-pole arc are all the center of the rotor punching sheet body, and the center of the rotor punching sheet body is the center of an upper rotating shaft hole of the rotor punching sheet body;
the radius of the first sub-pole arc is R1, the radius of the second sub-pole arc is R2, the radius of the third sub-pole arc is R3, and the arc angle corresponding to the first sub-pole arc is theta1The arc angle corresponding to the second sub-polar arc is theta2The arc angle corresponding to the third sub-polar arc is theta3；
Wherein the R1, the R2, and the R3 have sizes that satisfy: r2 is more than or equal to R3+0.5mm and more than or equal to R2 is more than or equal to R1-0.5mm, and R2 is more than or equal to 53mm and more than or equal to 56 mm;
theta is described1Theta of2And the theta3The size of (A) satisfies: theta3＜θ2＝1/3θ1。
Optionally, a V-shaped magnet slot is further arranged on the rotor punching body, the V-shaped magnet slot is used for placing a permanent magnet, and one V-shaped magnet slot is arranged on each rotor pole;
the V-shaped magnet slot is provided with two strip-shaped slot bodies which respectively extend towards two different directions and are far away from the rotating shaft hole, one ends of the two strip-shaped slot bodies close to the rotating shaft hole are in conduction connection and form a connecting corner, and the other ends of the two strip-shaped slot bodies are respectively close to the other ends of the two third sub-pole arcs;
the included angle of the two strip-shaped groove bodies is alpha, and the alpha satisfies the following conditions: alpha is more than or equal to 120 degrees and less than or equal to 140 degrees.
Optionally, the structure of the V-shaped magnet slot is symmetrical along the center line of the magnetic pole of the rotor magnetic pole.
Optionally, the rotor sheet body is further provided with magnetic beam arranging grooves, each rotor pole is provided with four magnetic beam arranging grooves, and the four magnetic beam arranging grooves are arranged in an area defined by the V-shaped magnet groove and the pole arc of the magnetic pole;
the four magnetic beam arrangement grooves comprise two first magnetic beam arrangement grooves and two second magnetic beam arrangement grooves;
the two sides of the magnetic pole center line of the rotor magnetic pole are respectively and symmetrically provided with the first magnetic beam arrangement groove and the second magnetic beam arrangement groove, the first magnetic beam arrangement groove is arranged at a position close to the magnetic pole center line, the second magnetic beam arrangement groove is arranged at a position far away from the magnetic pole center line, the included angle between the extending direction of the first magnetic beam arrangement groove and the extending direction of the strip-shaped groove body close to the first magnetic beam arrangement groove is beta, and the included angle between the extending direction of the second magnetic beam arrangement groove and the extending direction of the strip-shaped groove body close to the second magnetic beam arrangement groove is gamma;
wherein a ratio of β to γ is k, and k satisfies: k is more than or equal to 1.1 and less than or equal to 1.2.
Optionally, the length of the first magnetic beam arrangement groove is equal to the length of the second magnetic beam arrangement groove.
Optionally, the length of the first magnetic beam tidying groove is greater than the length of the second magnetic beam tidying groove.
Optionally, the number of rotor poles is 6.
Based on the same inventive concept, the invention further provides a rotor, which comprises a plurality of rotor sheets in the characteristic description, and the plurality of rotor sheets are stacked to form the rotor.
Based on the same inventive concept, the invention also provides a motor, which comprises a rotor as described in the above characteristic description, wherein the rotor is installed in the stator through a rotating shaft.
Based on the same inventive concept, the invention also proposes a compressor comprising an electric motor as described in the above characteristic description.
Compared with the prior art, the invention has the following beneficial effects:
the rotor punching sheet provided by the invention is designed into a rotor punching sheet with three sections of external diameters on the basis of a uniform and regular round rotor punching sheet in the prior art, and the radius of each section of sub-pole arc and the corresponding arc angle are reasonably designed.
The V-shaped magnet slots can be arranged on the rotor punching sheet, and the angle parameters of the V-shaped magnet slots are optimized, so that the using amount of the permanent magnets embedded into the rotor punching sheet is obviously increased compared with the prior art, the torque density of the motor is increased, and the back electromotive force of the motor and the efficiency of the motor are effectively improved.
In addition, four magnetic beam arranging grooves are formed in each rotor magnetic pole on the rotor punching sheet, and angle parameters of the magnetic beam arranging grooves are optimized, so that the torque pulsation of the motor can be further reduced, the noise and vibration of the compressor can be further reduced, and the control capacity of the motor and the compressor can be further effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a rotor sheet according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;
FIG. 3 is an enlarged view of a portion of the structure of FIG. 2;
101-a first sub-pole arc, 102-a second sub-pole arc, 103-a third sub-pole arc, 200-a rotating shaft hole, 300-a V-shaped magnet groove, 400-a magnetic pole center line, 501-a first magnetic beam sorting groove, 502-a second magnetic beam sorting groove, 600-a refrigerant through hole and 700-a rivet hole.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1 to 3, an embodiment of the present invention provides a rotor sheet, including a rotor sheet body, where the rotor sheet body has a plurality of rotor magnetic poles, and an arc-shaped portion of each rotor magnetic pole corresponding to the outer periphery of the rotor sheet body is a magnetic pole arc. Each magnetic pole polar arc includes first sub-polar arc 101, second sub-polar arc 102 and two third sub-polar arcs 103, the one end of first sub-polar arc 101 with the one end of second sub-polar arc 102 is connected, the other end of first sub-polar arc 101 with one of them the one end of third sub-polar arc 103 is connected, the other end of second sub-polar arc 102 and another the one end of third sub-polar arc 103 is connected. The centers of the first sub-polar arc 101, the second sub-polar arc 102 and the third sub-polar arc 103 are the centers of the rotor sheet bodies, and the centers of the rotor sheet bodies are the centers of the rotating shaft holes 200 of the rotor sheet bodies. The radius of the first sub-polar arc 101 is R1, the radius of the second sub-polar arc 102 is R2, the radius of the third sub-polar arc 103 is R3, and the corresponding arc angle of the first sub-polar arc 101 is theta1The arc angle corresponding to the second sub-polar arc 102 is θ2The arc angle corresponding to the third sub-polar arc 103 is θ3. Wherein the R1, the R2, and the R3 have sizes that satisfy: r3+0.5 mm-R2-R1-0.5 mm, R2-56 mm, and theta1Theta of2And the theta3The size of (A) satisfies: theta3＜θ2＝1/3θ1。
The difference with the prior art lies in that on the basis of the uniform and regular round rotor punching sheet in the prior art, the rotor punching sheet is designed to have three sections of rotor punching sheets with the outer diameters, please refer to fig. 2, and the radius of each section of sub-pole arc and the corresponding arc angle are reasonably designed, so that the structural design of the rotor punching sheet can reduce the air gap harmonic wave between the rotors, further reduce the torque pulsation of the motor, and effectively reduce the noise of the compressor. In the embodiment of the present invention, the magnitude relationship among R1, R2, and R3, and θ1Theta of2And the theta3Is limited, and is only implemented as a preferred embodiment of the present invention, the magnitude relationship among the R1, the R2, and the R3, and the θ1Theta of2And the theta3The relationship between the sizes of the two components can be other conditions, which are not described herein in detail. The structure of the rotor sheet can be the same as that of the rotor sheet provided by the embodiment of the invention.
Preferably, a V-shaped magnet slot 300 is further disposed on the rotor punching body, the V-shaped magnet slot 300 is used for placing permanent magnets, and each rotor pole is provided with one V-shaped magnet slot 300. The V-shaped magnet slot 300 has two strip-shaped slot bodies that extend towards two different directions respectively and are far away from the rotating shaft hole 200, two the strip-shaped slot bodies are close to one end of the rotating shaft hole 200 is in conduction connection and forms a connection corner, and two the other ends of the strip-shaped slot bodies are close to the other ends of the two third sub-pole arcs 103 respectively. The included angle of the two strip-shaped groove bodies is alpha, and the alpha satisfies the following conditions: alpha is more than or equal to 120 degrees and less than or equal to 140 degrees. Referring to fig. 1, by providing the V-shaped magnet slots 300 on the rotor sheet and optimizing the angle parameters of the V-shaped magnet slots 300, the amount of the permanent magnets embedded in the rotor sheet according to the present invention is significantly increased compared to the prior art, so as to increase the torque density of the motor, and further effectively increase the back electromotive force of the motor and the efficiency of the motor. Further, the structure of the V-shaped magnet slot 300 symmetrical along the pole center line 400 of the rotor pole may be implemented as a preferable solution of the embodiment of the present invention.
It should be noted that the solution of the present invention can be implemented by using not only the V-shaped magnet slots 300 but also the linear slots, and the permanent magnets are placed orthogonally to the diameter direction of the rotor core. The V-shaped magnet slot 300 can be implemented as a preferable embodiment because the amount of embedded permanent magnets can be increased, thereby increasing the torque density of the motor, satisfying the requirements for high efficiency and miniaturization of the motor, and having a technical effect superior to that of a linear slot. However, the structure is more complicated than that of the linear groove, and the process cost is higher than that of the linear groove, so that the structure can be selected according to actual needs in specific implementation.
By the structure of the V-shaped magnet slot 300, the using amount of the embedded permanent magnet is obviously improved, so that the torque density of the motor is improved, and the requirements of high efficiency and miniaturization of the motor can be met. Meanwhile, with continued reference to fig. 1, the rotor punching sheet is further provided with a plurality of coolant through holes 600 and rivet holes 700, the coolant through holes 600 are arranged around the rotating shaft hole 200, so that the requirement of the mechanical strength of the rotor can be met by increasing the number of the coolant through holes 600, and the condition that the magnetic force lines of the rotor main pole magnetic field form a closed loop through the coolant through holes 600 to cause the magnetic resistance of the rotor side to be obviously increased can be avoided, so that the coolant through area of the rotor can be increased as much as possible on the premise of ensuring the performance and reliability of the motor, the circulation of the coolant in the compressor is promoted, and the purpose of cooling the rotor is achieved.
Preferably, the rotor punching body is further provided with four magnetic beam arranging grooves, and each rotor magnetic pole is provided with four magnetic beam arranging grooves. The four magnetic beam arrangement grooves are arranged in an area enclosed by the V-shaped magnet groove 300 and the pole arcs of the magnetic poles, and comprise two first magnetic beam arrangement grooves 501 and two second magnetic beam arrangement grooves 502. The magnetic pole central line 400 both sides of rotor magnetic pole are symmetrical respectively and are provided with one first magnetic beam arrangement groove 501 and one second magnetic beam arrangement groove 502, first magnetic beam arrangement groove 501 sets up and is being close to magnetic pole central line 400 department, second magnetic beam arrangement groove 502 sets up and is keeping away from magnetic pole central line 400 department, the extending direction in first magnetic beam arrangement groove 501 is beta rather than the extending direction's that is close to strip cell body contained angle, the extending direction in second magnetic beam arrangement groove 502 is gamma rather than the extending direction's that is close to strip cell body contained angle. Wherein a ratio of β to γ is k, and k satisfies: k is more than or equal to 1.1 and less than or equal to 1.2. Referring to fig. 3, four magnetic beam arrangement grooves are formed in each rotor magnetic pole of the rotor sheet, and the angle parameters of the magnetic beam arrangement grooves are optimized, so that the torque ripple of the motor and the noise and vibration of the compressor can be further reduced, and the control capability of the motor and the compressor is effectively improved.
It should be noted that, referring to fig. 1 to fig. 3, in the embodiment of the present invention, the length of the first magnetic beam arranging groove 501 is not equal to the length of the second magnetic beam arranging groove 502, and the length of the first magnetic beam arranging groove 501 is greater than the length of the second magnetic beam arranging groove 502. It will be understood by those skilled in the art that in other embodiments, the relationship between the length of the first magnetic beam arranging groove 501 and the length of the second magnetic beam arranging groove 502 may be other situations, for example, the length of the first magnetic beam arranging groove 501 may be equal to the length of the second magnetic beam arranging groove 502, or the length of the first magnetic beam arranging groove 501 may be smaller than the length of the second magnetic beam arranging groove 502. The method is not limited herein, and may be specifically selected according to actual needs.
In addition, the applicant finds in experimental tests that the technical effect obtained by applying the technical scheme of the invention is the best when the rotor laminations are 6-pole rotor laminations, and therefore, the rotor lamination can be taken as a preferred embodiment of the invention when the number of the rotor magnetic poles is 6.
Based on the same inventive concept, another embodiment of the invention further provides a rotor, which includes a plurality of rotor sheets described in any one of the above feature descriptions, and the plurality of rotor sheets are stacked to form the rotor.
Based on the same inventive concept, a further embodiment of the present invention also provides an electric motor, comprising a rotor as described in the above-mentioned characterizing description, the rotor being mounted in the stator by means of a rotating shaft.
Based on the same inventive concept, a further embodiment of the present invention also provides a compressor comprising an electric motor as described in the above-mentioned characteristic description.
In summary, the rotor sheet provided by the invention is designed into a rotor sheet with three sections of outer diameters on the basis of a uniform and regular circular rotor sheet in the prior art, and the radius of each section of sub-pole arc and the corresponding arc angle are reasonably designed, so that the structural design of the rotor sheet can reduce the air gap harmonic between rotors, further reduce the torque pulsation of a motor, and effectively reduce the noise of a compressor.
The V-shaped magnet slots can be arranged on the rotor punching sheet, and the angle parameters of the V-shaped magnet slots are optimized, so that the using amount of the permanent magnets embedded into the rotor punching sheet is obviously increased compared with the prior art, the torque density of the motor is increased, and the back electromotive force of the motor and the efficiency of the motor are effectively improved.
In addition, four magnetic beam arranging grooves are formed in each rotor magnetic pole on the rotor punching sheet, and angle parameters of the magnetic beam arranging grooves are optimized, so that the torque pulsation of the motor can be further reduced, the noise and vibration of the compressor can be further reduced, and the control capacity of the motor and the compressor can be further effectively improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example" or "a specific example" or the like are intended to mean 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 are not necessarily intended to refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The rotor punching sheet is characterized by comprising a rotor punching sheet body, wherein the rotor punching sheet body is provided with a plurality of rotor magnetic poles, and the circular arc part of each rotor magnetic pole corresponding to the periphery of the rotor punching sheet body is a magnetic pole arc;
each magnetic pole polar arc comprises a first sub polar arc, a second sub polar arc and two third sub polar arcs, one end of the first sub polar arc is connected with one end of the second sub polar arc, the other end of the first sub polar arc is connected with one end of one of the third sub polar arcs, and the other end of the second sub polar arc is connected with one end of the other third sub polar arc;
the centers of the first sub-pole arc, the second sub-pole arc and the third sub-pole arc are all the center of the rotor punching sheet body, and the center of the rotor punching sheet body is the center of an upper rotating shaft hole of the rotor punching sheet body;
the radius of the first sub-pole arc is R1, the radius of the second sub-pole arc is R2, the radius of the third sub-pole arc is R3, and the arc angle corresponding to the first sub-pole arc is theta1The arc angle corresponding to the second sub-polar arc is theta2The arc angle corresponding to the third sub-polar arc is theta3；
Wherein the R1, the R2, and the R3 have sizes that satisfy: r2 is more than or equal to R3+0.5mm and more than or equal to R2 is more than or equal to R1-0.5mm, and R2 is more than or equal to 53mm and more than or equal to 56 mm;
theta is described1Theta of2And the theta3The size of (A) satisfies: theta3＜θ2＝1/3θ1。
2. The rotor punching sheet according to claim 1, wherein a V-shaped magnet slot is further formed in the rotor punching sheet body and used for placing permanent magnets, and one V-shaped magnet slot is formed in each rotor pole;
the V-shaped magnet slot is provided with two strip-shaped slot bodies which respectively extend towards two different directions and are far away from the rotating shaft hole, one ends of the two strip-shaped slot bodies close to the rotating shaft hole are in conduction connection and form a connecting corner, and the other ends of the two strip-shaped slot bodies are respectively close to the other ends of the two third sub-pole arcs;
the included angle of the two strip-shaped groove bodies is alpha, and the alpha satisfies the following conditions: alpha is more than or equal to 120 degrees and less than or equal to 140 degrees.
3. The rotor sheet as recited in claim 2, wherein the structure of the V-shaped magnet slots is symmetrical along a pole center line of the rotor pole.
4. The rotor punching sheet according to claim 2, wherein the rotor punching sheet body is further provided with four magnetic beam arranging grooves, each of the rotor poles is provided with four magnetic beam arranging grooves, and the four magnetic beam arranging grooves are arranged in an area defined by the V-shaped magnet grooves and the pole arcs of the magnetic poles;
the four magnetic beam arrangement grooves comprise two first magnetic beam arrangement grooves and two second magnetic beam arrangement grooves;
the two sides of the magnetic pole center line of the rotor magnetic pole are respectively and symmetrically provided with the first magnetic beam arrangement groove and the second magnetic beam arrangement groove, the first magnetic beam arrangement groove is arranged at a position close to the magnetic pole center line, the second magnetic beam arrangement groove is arranged at a position far away from the magnetic pole center line, the included angle between the extending direction of the first magnetic beam arrangement groove and the extending direction of the strip-shaped groove body close to the first magnetic beam arrangement groove is beta, and the included angle between the extending direction of the second magnetic beam arrangement groove and the extending direction of the strip-shaped groove body close to the second magnetic beam arrangement groove is gamma;
wherein a ratio of β to γ is k, and k satisfies: k is more than or equal to 1.1 and less than or equal to 1.2.
5. The rotor sheet as recited in claim 4, wherein the first magnetic flux arranging groove has a length equal to a length of the second magnetic flux arranging groove.
6. The rotor sheet as recited in claim 4, wherein the length of the first magnetic beam arranging groove is greater than the length of the second magnetic beam arranging groove.
7. The rotor sheet according to any one of claims 1 to 6, wherein the number of the rotor poles is 6.
8. A rotor, characterized by comprising a plurality of rotor sheets according to any one of claims 1 to 7, wherein the plurality of rotor sheets are stacked to form the rotor.
9. An electric motor comprising a stator and a rotor as claimed in claim 8, said rotor being mounted in said stator by a shaft.
10. A compressor comprising an electric motor as claimed in claim 9.
CN202010403459.1A 2020-05-13 2020-05-13 Rotor punching sheet, rotor, motor and compressor Active CN113675967B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001346368A (en) * 2000-03-31 2001-12-14 Sanyo Denki Co Ltd Synchronous motor comprising a permanent magnet
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JP2008099418A (en) * 2006-10-11 2008-04-24 Matsushita Electric Ind Co Ltd Permanent magnet embedded type motor
CN109104012A (en) * 2017-06-21 2018-12-28 上海海立电器有限公司 Motor rotor, motor and DC frequency-changeable compressor
CN212114928U (en) * 2020-05-13 2020-12-08 上海海立电器有限公司 Rotor punching sheet, rotor, motor and compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001346368A (en) * 2000-03-31 2001-12-14 Sanyo Denki Co Ltd Synchronous motor comprising a permanent magnet
JP2004343861A (en) * 2003-05-14 2004-12-02 Matsushita Electric Ind Co Ltd Permanent magnet synchronous motor
JP2008099418A (en) * 2006-10-11 2008-04-24 Matsushita Electric Ind Co Ltd Permanent magnet embedded type motor
CN109104012A (en) * 2017-06-21 2018-12-28 上海海立电器有限公司 Motor rotor, motor and DC frequency-changeable compressor
CN212114928U (en) * 2020-05-13 2020-12-08 上海海立电器有限公司 Rotor punching sheet, rotor, motor and compressor

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