CN214674575U - Stator and rotor structure, permanent magnet motor and compressor - Google Patents
Stator and rotor structure, permanent magnet motor and compressor Download PDFInfo
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- CN214674575U CN214674575U CN202120704389.3U CN202120704389U CN214674575U CN 214674575 U CN214674575 U CN 214674575U CN 202120704389 U CN202120704389 U CN 202120704389U CN 214674575 U CN214674575 U CN 214674575U
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Abstract
The utility model provides a decide, rotor structure and permanent-magnet machine, compressor, wherein decide, rotor structure includes stator and rotor, the external diameter of stator is D1, the external diameter of rotor is D2, D1 satisfies with D2's ratio: 1.76 and D1/D2 and 1.87, wherein the stator comprises a stator yoke and a plurality of stator teeth distributed along the circumferential direction, a stator slot is formed between the two stator teeth, the tooth width of each stator tooth is L1, the yoke thickness of the stator yoke is L2, and the ratio of L1 to L2 is as follows: L1/L2 is more than or equal to 0.65 and less than or equal to 0.75. The utility model discloses a rationally set up the mechanical geometry appearance of stator and rotor and some important mechanical dimensions's in deciding, the rotor structure proportion to improve permanent-magnet machine's performance, specifically through injecing the external diameter of stator with the ratio of the external diameter of stator and the tooth width of stator tooth with the thick ratio of yoke of stator yoke portion to improve the energy loss of permanent-magnet machine operation in-process, improved the permanent-magnet machine performance.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to decide, rotor structure and permanent-magnet machine, compressor.
Background
Permanent magnet machines are usually formed by an outer stator, in which stator slots are provided in which the windings are embedded, and an inner rotor, in which magnet slots are provided in which the magnet structures are inserted. The rotor is rotated by interaction of a magnetic field generated by passing current through the fixed stator winding and a magnetic field generated by the rotor magnet structure.
Permanent magnet motors are widely used in high-tech fields and in people's daily lives, and people are constantly improving and increasing the performance of permanent magnet motors and the manufacturing process of permanent magnet motors according to different occasions where permanent magnet motors are used.
In the conventional manufacturing process of the stator and the rotor of the permanent magnet motor, due to the factors of the conventional design theory, the conventional manufacturing process and materials, the adopted mechanical geometric shape and the proportion of some important mechanical dimensions are not reasonable, so that the following problems are caused:
1) the unreasonable external diameter ratio of the stator and the rotor can cause the rotor inertia to be unsuitable for the working condition of the compressor, and energy loss is caused in the low-speed operation process of the motor.
2) In the stator, because the size design of tooth portion, yoke portion is unreasonable to lead to the magnetic circuit inhomogeneous to make the stator generate heat unevenly, make permanent-magnet machine's torque ripple great, influence permanent-magnet machine efficiency's improvement.
3) In the rotor, the contained angle of magnet structure in the magnet groove is not reasonable can lead to magnet structure magnetic leakage more, makes the utilization ratio of magnet structure descend, and can influence permanent-magnet machine's back electromotive force, and the copper loss when increasing permanent-magnet machine operation reduces permanent-magnet machine performance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a decide, rotor structure and permanent-magnet machine, compressor to solve permanent-magnet machine's deciding, rotor manufacturing process among the prior art because of the factor of being controlled in traditional design theory and traditional manufacturing process and material, the mechanical geometry appearance of adoption and some important mechanical dimensions's proportion is not very reasonable, thereby influences the problem of permanent-magnet machine performance. The specific technical scheme is as follows:
in a first aspect, the present invention provides a stator and rotor structure for a 9-slot 6-pole permanent magnet motor, the stator and rotor structure comprises a stator and a rotor, the outer diameter of the stator is D1, the outer diameter of the rotor is D2, the ratio of D1 to D2 satisfies: D1/D2 of more than or equal to 1.76 and less than or equal to 1.87;
the stator comprises a stator yoke and a plurality of stator teeth distributed along the circumferential direction, stator slots are formed between the stator teeth, the tooth width of each stator tooth is L1, the yoke thickness of the stator yoke is L2, and the ratio of L1 to L2 satisfies the following conditions: L1/L2 is more than or equal to 0.65 and less than or equal to 0.75.
Optionally, an even number of magnet slots are formed in the rotor, and a magnet structure is inserted into each magnet slot.
Optionally, the magnet structure is a V-shaped magnet structure, the included angle of the magnet structure of the V-shaped magnet structure is θ, and the ratio of θ to D2 satisfies: 2.25 is less than or equal to theta/D2 is less than or equal to 2.46.
Optionally, the outer edge of the stator corresponding to each stator tooth is recessed inwards to form a stator flow passing groove, the depth of the stator flow passing groove is L3, the width of the stator flow passing groove is L4, and the ratio of L3 to L1 satisfies: L3/L1 is more than or equal to 0.25 and less than or equal to 0.28.
Optionally, the ratio of L4 to L2 satisfies: L4/L2 is more than or equal to 1.5 and less than or equal to 2.2.
In a second aspect, the present invention provides a permanent magnet motor, including a stator and a rotor structure as described in the first aspect.
In a third aspect, the present invention provides a compressor comprising the permanent magnet motor according to the second aspect. The utility model provides a pair of decide, rotor structure and permanent-magnet machine, compressor has following beneficial effect: wherein the stator and rotor structure comprises a stator and a rotor, the outer diameter of the stator is D1, the outer diameter of the rotor is D2, and the ratio of D1 to D2 satisfies: 1.76 and D1/D2 and 1.87, wherein the stator comprises a stator yoke and a plurality of stator teeth distributed along the circumferential direction, a stator slot is formed between the two stator teeth, the tooth width of each stator tooth is L1, the yoke thickness of the stator yoke is L2, and the ratio of L1 to L2 is as follows: L1/L2 is more than or equal to 0.65 and less than or equal to 0.75. The utility model discloses a rationally set up the mechanical geometry appearance of stator and rotor and some important mechanical dimensions's in deciding, the rotor structure proportion to improve permanent-magnet machine's performance, specifically through injecing the external diameter of stator with the ratio of the external diameter of stator and the tooth width of stator tooth with the thick ratio of yoke of stator yoke portion to improve the energy loss of permanent-magnet machine operation in-process, improved the permanent-magnet machine performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a stator and rotor structure according to an embodiment of the present invention;
fig. 2 is a partial schematic view of a stator and rotor structure according to an embodiment of the present invention;
wherein the reference numerals of figures 1-2 are as follows:
1-a stator; 11-stator teeth; 12-a stator yoke; 13-stator slots; 14-stator flow through groove; 2-a rotor; 21-magnet configuration.
Detailed Description
The stator and rotor structure, the motor and the compressor according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
The utility model discloses a core thought lies in providing a decide, rotor structure and permanent-magnet machine, compressor, decides, rotor structure in through reasonable setting the mechanical geometry appearance of stator and rotor and some important mechanical dimensions's proportion to improve permanent-magnet machine's performance.
Therefore, the utility model provides a decide, rotor structure, be particularly useful for 9 grooves 6 utmost point permanent-magnet machine, please refer to fig. 1 and fig. 2, decide, rotor structure includes stator 1 and rotor 2, the external diameter of stator 1 is D1, the external diameter of rotor 2 is D2, the ratio of D1 and D2 satisfies: D1/D2 of more than or equal to 1.76 and less than or equal to 1.87. In the embodiment, the ratio of the outer diameters of the stator 1 and the rotor 2 in the stator and rotor structures is reasonably set, so that the rotor rotational inertia suitable for the working condition of the compressor is limited, and the energy loss caused in the low-speed running process of the permanent magnet motor is compensated.
Further, the stator 1 comprises a stator yoke 12 and a plurality of stator teeth 11 distributed along the circumferential direction, a stator slot 13 is formed between two of the stator teeth 11, wherein the tooth width of the stator teeth 11 is L1, the yoke thickness of the stator yoke 12 is L2, and the ratio of L1 to L2 satisfies: L1/L2 is more than or equal to 0.65 and less than or equal to 0.75.
The inventor experimentally found that, on the premise that the split ratio between the stator 1 and the rotor 2 (i.e. the ratio between the outer diameters of the stator and the rotor) is proper (i.e. 1.76 ≦ D1/D2 ≦ 1.87 is satisfied), for example, the outer diameter D1 of the stator 1 is 101.1mm and the outer diameter D2 of the rotor 2 is 57mm in a permanent magnet motor, i.e. on the premise that the split ratio between the stator 1 and the rotor 2 is D1/D2 is 101.1/57, the ratio between the tooth width L1 of the stator teeth 11 and the yoke thickness L2 of the stator yoke 12 is adjusted to study the performance index change of the permanent magnet motor under different values of L1/L2. In this example, the following data are compared for L1 and L2, respectively, and the comparison of the main parameters is shown in the following table:
| the stator and rotor split ratio phi 101.1/phi 57 | L1(mm) | L2(mm) | Magnetic density of stator | Performance of electric machine |
| Size of the prior art | 6.0 | 9.5 | 1.645 | 92.11％ |
| Size 1 of the present example | 7.0 | 9.5 | 1.632 | 92.84％ |
| |
7.3 | 10.3 | 1.619 | 93.24％ |
The inventor finds that when the crack ratio between the stator 1 and the rotor 2 meets the requirement that D1/D2 is more than or equal to 1.76 and less than or equal to 1.87, the ratio of the tooth width L1 of the stator teeth 11 to the yoke thickness L2 of the stator yoke 12 is adjusted to meet the requirement that L1/L2 is more than or equal to 0.65 and less than or equal to 0.75, so that the magnetic density of the stator can be effectively reduced, the iron loss of the stator is reduced, and the performance of the permanent magnet motor is improved.
Further, an even number of magnet slots are provided on the rotor 2, and a magnet structure 21 is inserted into each magnet slot. Specifically, magnet structure 21 is the V type, the V type magnet structure 21's contained angle is theta, theta satisfies with D2's ratio: 2.25 is less than or equal to theta/D2 is less than or equal to 2.46.
The inventor experimentally finds that under the common premise that the split ratio (i.e. the ratio of the outer diameters of the stator and the rotor) of the stator 1 and the rotor 2 is proper (i.e. 1.76-D1/D2-1.87 is satisfied) and the ratio of the tooth width L1 of the stator teeth 11 to the yoke thickness L2 of the stator yoke 12 is proper (i.e. 0.65-L1/L2-0.75 is satisfied), the included angle theta of the magnet structure 21 is adjusted to study the performance index change of the permanent magnet motor under different values of theta/D2. In this embodiment, the value of the outer diameter D2 of the rotor 2 is fixed, D2 is 57mm, and θ is compared with the following sets of data, and the main parameters are compared as shown in the following table:
| rotor phi 57 | Angle theta | Back electromotive force | Motor running current | Performance of electric machine |
| Size of contrast | 124° | 52.34 | 1.84 | 92.84％ |
| Size 1 of the present example | 140° | 52.41 | 1.82 | 92.91％ |
| Size 1 of the present example | 137° | 53.52 | 1.78 | 93.37％ |
The inventor finds that when the crack ratio of the stator 1 and the rotor 2 meets 1.76-1.87 and the ratio of the tooth width L1 of the stator tooth 11 to the yoke thickness L2 of the stator yoke 12 meets 0.65-0. 1/L2-0.75, the ratio of the included angle theta of the magnet structure 21 to the outer diameter D2 of the rotor 2 is adjusted to meet 2.25-2.46, so that the back electromotive force of the permanent magnet motor can be optimized, the running current of the permanent magnet motor is reduced, the copper loss of the permanent magnet motor during running is reduced, and the performance of the permanent magnet motor is improved.
Further, the outer edge of the stator corresponding to each stator tooth 11 is recessed inwards to form a stator through flow groove 14, the depth of the stator through flow groove 14 is L3, the width of the stator through flow groove 14 is L4, and the ratio of L3 to L1 satisfies: 0.25 and less than or equal to L3/L1 and less than or equal to 0.28, wherein the ratio of L4 to L2 satisfies the following conditions: L4/L2 is more than or equal to 1.5 and less than or equal to 2.2. The inventor researches and finds that the ratio of L3 to L1 is in the value range and the ratio of L4 to L2 is in the value range, the deformation of the inner diameter of the stator can be reduced, the strength of the stator is ensured, the gap between the stator and the rotor can be uniform, and the electromagnetic noise is improved.
Therefore, the stator and rotor structure provided by the embodiment limits the rotor moment of inertia suitable for the working condition of the compressor by selecting the suitable ratio of the outer diameters of the stator and the rotor, and makes up the energy loss caused in the low-speed operation process of the motor. Meanwhile, according to the winding specification of a specific permanent magnet motor (the permanent magnet motor with 9 slots and 6 poles in the embodiment), the ratio of the tooth width of the stator teeth to the yoke thickness of the stator yoke and the included angle of the magnet structure are reasonably designed, so that the copper and iron losses of the permanent magnet motor in the operation process are balanced, the back electromotive force of the permanent magnet motor is improved, the energy loss of the permanent magnet motor in the operation process is improved, and the performance of the permanent magnet motor is improved.
Based on the same inventive concept, the embodiment further provides a permanent magnet motor, which comprises the stator and rotor structure.
Based on the same inventive concept, the present embodiment further provides a compressor, including the permanent magnet motor as described above.
To sum up, the utility model provides a pair of permanent-magnet machine's deciding, rotor structure has following advantage: wherein the stator and rotor structure comprises a stator and a rotor, the outer diameter of the stator is D1, the outer diameter of the rotor is D2, and the ratio of D1 to D2 satisfies: 1.76 and D1/D2 and 1.87, wherein the stator comprises a stator yoke and a plurality of stator teeth distributed along the circumferential direction, a stator slot is formed between the two stator teeth, the tooth width of each stator tooth is L1, the yoke thickness of the stator yoke is L2, and the ratio of L1 to L2 is as follows: L1/L2 is more than or equal to 0.65 and less than or equal to 0.75. The utility model discloses a rationally set up the mechanical geometry appearance of stator and rotor and some important mechanical dimensions's in deciding, the rotor structure proportion to improve permanent-magnet machine's performance, specifically through injecing the external diameter of stator with the ratio of the external diameter of stator and the tooth width of stator tooth with the thick ratio of yoke of stator yoke portion to improve the energy loss of permanent-magnet machine operation in-process, improved the permanent-magnet machine performance.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A stator and rotor structure for a 9-slot 6-pole permanent magnet motor is characterized in that the stator and rotor structure comprises a stator and a rotor, the outer diameter of the stator is D1, the outer diameter of the rotor is D2, and the ratio of D1 to D2 satisfies the following conditions: D1/D2 of more than or equal to 1.76 and less than or equal to 1.87;
the stator comprises a stator yoke and a plurality of stator teeth distributed along the circumferential direction, stator slots are formed between the stator teeth, the tooth width of each stator tooth is L1, the yoke thickness of the stator yoke is L2, and the ratio of L1 to L2 satisfies the following conditions: L1/L2 is more than or equal to 0.65 and less than or equal to 0.75.
2. The stator and rotor structure according to claim 1 wherein said rotor is provided with an even number of magnet slots, each of said magnet slots having a magnet structure inserted therein.
3. The stator and rotor structure according to claim 2, wherein the magnet structure is V-shaped, the included angle of the V-shaped magnet structure is θ, and the ratio of θ to D2 satisfies: 2.25 is less than or equal to theta/D2 is less than or equal to 2.46.
4. The stator and rotor structure of claim 1, wherein the stator teeth each have a corresponding stator outer edge recessed inward to form a stator flow groove, the stator flow groove has a depth of L3, the stator flow groove has a width of L4, and the ratio of L3 to L1 satisfies: L3/L1 is more than or equal to 0.25 and less than or equal to 0.28.
5. The stator and rotor structure according to claim 4, wherein the ratio of L4 to L2 satisfies: L4/L2 is more than or equal to 1.5 and less than or equal to 2.2.
6. A permanent magnet electric machine comprising a stator-rotor structure according to any one of claims 1-5.
7. A compressor comprising a permanent magnet motor according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120704389.3U CN214674575U (en) | 2021-04-07 | 2021-04-07 | Stator and rotor structure, permanent magnet motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120704389.3U CN214674575U (en) | 2021-04-07 | 2021-04-07 | Stator and rotor structure, permanent magnet motor and compressor |
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| Publication Number | Publication Date |
|---|---|
| CN214674575U true CN214674575U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120704389.3U Active CN214674575U (en) | 2021-04-07 | 2021-04-07 | Stator and rotor structure, permanent magnet motor and compressor |
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| Country | Link |
|---|---|
| CN (1) | CN214674575U (en) |
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2021
- 2021-04-07 CN CN202120704389.3U patent/CN214674575U/en active Active
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