Motor and compressor

Abstract

The invention provides a motor and a compressor, and relates to the technical field of motors. The motor comprises a motor stator and a motor rotor, the motor rotor is arranged inside the motor stator, a plurality of first slotted holes are formed in the motor stator in the circumferential direction of the motor stator, a plurality of second slotted holes are formed in the motor rotor in the circumferential direction of the motor rotor, and the motor at least meets one of the following formulas: (Q1 * TS) / HC1 is larger than 5.4 and smaller than or equal to 6.0, (Q2 * TR) / HC2 is larger than or equal to 3.5 and smaller than or equal to 4.1, and (Q1 * TS) / (Q2 * TR) is larger than or equal to 0.9 and smaller than or equal to 1.2; wherein Q1 is the number of the first groove holes, Q2 is the number of the second groove holes, TS is the average tooth width of the first groove holes, TR is the average tooth width of the second groove holes, HC1 is the average groove yoke width of the first groove holes, HC2 is the distance between the second groove holes and the circle center of the motor rotor, the magnetic circuit flux density distribution of the motor is reasonable, and the probability of bad problems is reduced.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor and a compressor. Background Art

[0002] At present, compressors used in air conditioners, heat pumps and other fields usually adopt single-phase and three-phase induction motors, among which, a plurality of stator winding slots are provided on the motor stator, and a plurality of rotor cast aluminum (copper) slots are provided on the motor rotor. Since the design of the stator and rotor slots has a great influence on the tooth torque, air gap and leakage magnetic coefficient, winding and cast aluminum (copper) process, copper / aluminum material cost, etc., if the above slots are not designed reasonably, it will lead to unreasonable distribution of magnetic flux density of the motor's magnetic circuit, and then cause various adverse problems of the motor. Summary of the invention

[0003] The purpose of the present application includes, for example, providing a motor with a reasonable magnetic circuit flux density distribution to reduce the probability of adverse problems.

[0004] The purpose of the present application also includes providing a compressor in which the magnetic circuit magnetic density of the motor is reasonably distributed and the probability of the motor having adverse problems is reduced.

[0005] The embodiments of the present application can be implemented as follows:

[0006] An embodiment of the present application provides a motor, which includes a motor stator and a motor rotor, wherein the motor rotor is arranged inside the motor stator, a plurality of first slots are opened on the motor stator along its circumference, and a plurality of second slots are opened on the motor rotor along its circumference, and the motor satisfies at least one of the following formulas:

[0007] 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2;

[0008] Wherein, Q1 is the number of the first slots, Q2 is the number of the second slots, T S is the average tooth width of the first slot, T R is the average tooth width of the second slot, H C1 is the average slot yoke width of the first slot, H C2 is the distance between the second slot and the center of the motor rotor.

[0009] Optionally, the motor at least satisfies: 5.55<(Q1*T S ) / H C1≤6.0.

[0010] Optionally, the calculation formula of the average yoke width of the first slot is:

[0011] H C1 =(H C11 *Q 11 +H C12 *Q 12 +…+H C1i *Q 1i ) / Q1;

[0012] Among them, H C1i is the slot yoke width of the first slot hole of the i-th type, the slot yoke widths of the first slot holes of the same type are equal, Q 1i is the number of the first slots of the i-th type.

[0013] Optionally, the motor at least satisfies: (Q1*T S ) / H C1 =5.49, 5.55, 5.58, 5.72 or 5.73.

[0014] Optionally, the motor at least satisfies: (Q2*T R ) / H C2 =3.63, 3.76 or 4.00.

[0015] Optionally, all of the second slots are equidistant from the center of the motor rotor.

[0016] Optionally, the motor rotor and the motor stator are both made of electrical steel coils, and the thickness of the electrical steel coils is 0.35-0.5 mm.

[0017] Optionally, the magnetic induction intensity B of the electrical steel coil 50 ≥1.76T.

[0018] Optionally, the second slot is a cast aluminum slot or a cast copper slot.

[0019] The present application also provides a compressor, comprising the motor.

[0020] The beneficial effects of the motor and the compressor provided by the embodiments of the present application include, for example: in order to make the magnetic flux density distribution of the motor's magnetic circuit reasonable and reduce the probability of bad problems, a motor is designed, which includes a motor stator and a motor rotor, the motor rotor is arranged inside the motor stator, a plurality of first slots are opened along its own circumference on the motor stator, a plurality of second slots are opened along its own circumference on the motor rotor, and the motor satisfies at least one of the following formulas: 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*TR ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2, where Q1 is the number of the first slots, Q2 is the number of the second slots, T S is the average tooth width of the first slot, T R is the average tooth width of the second slot, H C1 is the average slot yoke width of the first slot, H C2 is the distance between the second slot and the center of the motor rotor. When the motor satisfies at least one of the above formulas, the magnetic flux density distribution of the motor is more reasonable and the probability of adverse problems can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram used to show the coordination between the motor stator and the motor rotor in the embodiment of the present application;

[0023] Figure 2 A schematic diagram of a motor stator in an embodiment of the present application;

[0024] Figure 3 Schematic diagram of a motor rotor in an embodiment of the present application;

[0025] Figure 4 This is a graph used to show the change of motor efficiency with power in the embodiment of the present application;

[0026] Figure 5 This is a graph used to show the change of the main coil electrical density with the output power in the low-voltage test in the embodiment of the present application;

[0027] Figure 6 This is a graph used to show the change of the secondary coil electrical density with the output power in the low voltage test in the embodiment of the present application;

[0028] Figure 7 This is a graph used to show the change of the main coil electrical density with the output power in the high voltage test in the embodiment of the present application;

[0029] Figure 8 This is a graph used to show how the electrical density of the secondary coil changes with output power in a high voltage test in an embodiment of the present application.

[0030] Icon: 100 - motor stator; 110 - first slot; 200 - motor rotor; 210 - second slot. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0037] The inventor of the present application has found that the design of the stator and rotor slots has a great influence on the tooth torque, air gap and leakage coefficient, winding and cast aluminum (copper) process, copper / aluminum material cost, etc. If the slot design is unreasonable, it will lead to unreasonable magnetic flux distribution of the motor, which will lead to the motor having problems such as increased motor excitation current, reduced power factor, low motor efficiency, increased temperature and poor noise. The embodiments of the present application provide a motor, which is at least used to solve the above technical problems.

[0038] Please refer to Figure 1-Figure 3The motor provided in the embodiment of the present application includes a motor stator 100 and a motor rotor 200. The motor rotor 200 is arranged inside the motor stator 100. The motor stator 100 is provided with a plurality of first slots 110 along its circumference. The motor rotor 200 is provided with a plurality of second slots 210 along its circumference. The motor satisfies at least one of the following formulas: 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2; wherein Q1 is the number of the first slots 110, Q2 is the number of the second slots 210, T S is the average tooth width of the first slot 110, T R is the average tooth width of the second slot 210, H C1 is the average slot yoke width of the first slot hole 110, H C2 is the distance between the second slot 210 and the center of the motor rotor 200 .

[0039] The motor stator 100 and the motor rotor 200 are coaxially arranged, the plurality of first slots 110 are close to the inner edge of the motor stator 100 , and the plurality of second slots 210 are close to the outer edge of the motor rotor 200 .

[0040] It should be noted that the average tooth width of the first slot hole 110 refers to the average value of the spacing between two adjacent first slot holes 110, the average tooth width of the second slot hole 210 refers to the average value of the spacing between two adjacent second slot holes 210, the slot yoke width of the first slot hole 110 is the distance between the first slot hole 110 and the outer edge of the motor stator 100, the average slot yoke width of the first slot hole 110 refers to the average value of the distance between all the first slot holes 110 and the outer edge of the motor stator 100, and the distance between all the second slot holes 210 and the center of the motor rotor 200 is equal.

[0041] The motor should meet at least 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2, the magnetic flux density distribution of the motor is more reasonable and the probability of adverse problems can be reduced.

[0042] The motor should at least meet 5.4<(Q1*T S ) / H C1≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2 in one of the formulas: The motor only satisfies 5.4<(Q1*T S ) / H C1 ≤6.0, or the motor only meets 3.5≤(Q2*T R ) / H C2 ≤4.1, or the motor only meets 0.9≤(Q1*T S ) / (Q2*T R )≤1.2, or the motor meets 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2, or the motor meets 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2.

[0043] In some embodiments, the motor at least satisfies: 5.55<(Q1*T S ) / H C1 ≤6.0.

[0044] The motor should at least meet 5.55<(Q1*T S ) / H C1 ≤6.0 includes: the motor only meets 5.55<(Q1*T S ) / H C1 ≤6.0, or the motor only meets 3.5≤(Q2*T R ) / H C2 ≤4.1, or the motor only meets 0.9≤(Q1*T S ) / (Q2*T R )≤1.2, or the motor meets 5.55<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R)≤1.2, or the motor satisfies 5.55<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2.

[0045] In some optional embodiments, the motor at least satisfies: (Q1*T S ) / H C1 =5.49, 5.55, 5.58, 5.72 or 5.73, or the motor at least meets: (Q2*T R ) / H C2 =3.63, 3.76 or 4.00.

[0046] In the embodiment of the present application, the average yoke width H of the first slot 110 is C1 The calculation formula is: C1 =(H C11 *Q 11 +H C12 *Q 12 +…+H C1i *Q 1i ) / Q1; where H C1i is the slot yoke width of the i-th type of first slot hole 110. The slot yoke widths of the first slot holes 110 of the same type are equal. 1i is the number of the first slots 110 of the i-th type, Q1=Q 11 +Q 12 +…+Q 1i .

[0047] For example, H C11 is the slot yoke width of the first type of first slot hole 110, and the number of the first type of first slot holes 110 is Q 11 ;H C12 is the slot yoke width of the second type first slot hole 110, and the number of the second type first slot holes 110 is Q 12 .

[0048] In the embodiment of the present application, the calculation formula of the average tooth width of the first slot 110 is: S =(T S1 +T S2 +…+T Si ) / Q1, where T Si It is the tooth width between any two adjacent first slots 110 .

[0049] It should be noted that the tooth width between any two adjacent first slot holes 110 is the spacing between any two adjacent first slot holes 110 . When the tooth width between any two adjacent first slot holes 110 is equal, the average tooth width of the first slot holes 110 is the tooth width between any two adjacent first slot holes 110 .

[0050] In the embodiment of the present application, the calculation formula of the average tooth width of the second slot 210 is: R =(T R1 +T R2 +…+T Ri ) / Q2, where T Ri It is the tooth width between any two adjacent second slots 210 .

[0051] It should be noted that the tooth width between any two adjacent second slot holes 210 is the spacing between any two adjacent second slot holes 210 . When the tooth width between any two adjacent second slot holes 210 is equal, the average tooth width of the second slot holes 210 is the tooth width between any two adjacent second slot holes 210 .

[0052] In the embodiment of the present application, the motor rotor 200 and the motor stator 100 are both made of electrical steel coils, and the thickness of the electrical steel coils is 0.35-0.5 mm.

[0053] Under the existing technical framework of the electromagnetic steel sheet industry, the motor rotor 200 and the motor stator 100 are both made of high magnetic inductance electrical steel, and the thickness of the electrical steel coil can be selected to be 0.35 mm or 0.5 mm.

[0054] In the embodiment of the present application, the magnetic induction intensity B of the electrical steel coil 50 ≥1.76T.

[0055] It should be noted that the magnetic induction intensity B of electrical steel coil 50 =1.76T means that when the magnetic field intensity H reaches 5000A / m, the magnetic density in the electrical steel reaches 1.76T, and the magnetic induction intensity B 50 The larger the value, the better the magnetic induction of the electrical steel.

[0056] In the embodiment of the present application, the second slot 210 is a cast aluminum slot or a cast copper slot. Aluminum and copper are both good conductive materials. When used in the motor rotor 200 winding, the line resistance can be reduced and the conductive performance of the motor can be improved.

[0057] The technical effects achieved by the present application are illustrated by comparing the embodiments and comparative examples:

[0058] In the embodiment, the motor satisfies at least one of the following formulas: 5.4<(Q1*T S ) / H C1≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2; In the comparative example, the motor does not satisfy any of the above formulas.

[0059] Please refer to Figure 4 In terms of motor efficiency, for a single-phase fixed-speed all-copper wire motor, when the motor power is the same, the motor efficiency in the embodiment is greater than the motor efficiency in the comparison example.

[0060] Exemplarily, when the motor power is 1100w, the motor efficiency in the embodiment is between 90%-91%, while the motor efficiency in the comparative example is between 88%-89%; when the motor power is 1300w, the motor efficiency in the embodiment is between 90%-91%, while the motor efficiency in the comparative example is between 89%-90%; when the motor power is 1700w, the motor efficiency in the embodiment is between 90%-91%, while the motor efficiency in the comparative example is between 88%-89%.

[0061] Please refer to Figure 5-Figure 8 In terms of temperature rise improvement, for single-phase fixed-speed all-aluminum wire motors, in the low-voltage overload simulation test, the output power P out Under the same conditions, the motor main coil electrical density △Im in the embodiment is smaller than the motor main coil electrical density △Im in the comparative example, and the motor auxiliary coil electrical density △Ia in the embodiment is smaller than the motor auxiliary coil electrical density △Ia in the comparative example.

[0062] For example, in the low voltage overload simulation test, the output power P out =2300w, the main coil electric density △Im of the motor in the embodiment is 7.0-8.0A / mm 2 , the secondary coil electric density △Ia is 5.0-5.2A / mm 2 The main coil electric density of the motor in the comparative example is 8.0-9.0A / mm 2 , the secondary coil electric density △Ia is 5.4-5.6A / mm 2 Output power P out =2500w, the main coil electric density △Im of the motor in the embodiment is 8.0-9.0A / mm 2 , the secondary coil electric density △Ia is 5.0-5.2A / mm 2 The motor main coil electric density △Im in the comparative example is 10.0-11.0A / mm 2 , the secondary coil electric density △Ia is 5.2-5.4A / mm 2 .

[0063] For a single-phase fixed-speed all-aluminum wire motor, in the high voltage overload simulation test, the output power P out Under the same conditions, the motor main coil electrical density △Im in the embodiment is smaller than the motor main coil electrical density △Im in the comparative example, and the motor auxiliary coil electrical density △Ia in the embodiment is smaller than the motor auxiliary coil electrical density △Ia in the comparative example.

[0064] For example, in a high voltage overload simulation test, the output power P out =2100w, the main coil electric density △Im of the motor in the embodiment is 5.5-6.5A / mm 2 , the secondary coil electric density △Ia is 7.0-7.5A / mm 2 The main coil electric density of the motor in the comparative example is 7.5-8.5A / mm 2 , the secondary coil electric density △Ia is 9.5-10.0A / mm 2 Output power P out =2500w, the main coil electric density △Im of the motor in the embodiment is 6.5-7.5A / mm 2 , the secondary coil electric density △Ia is 7.0-7.5A / mm 2 The main coil electric density of the motor in the comparative example is 8.5-9.5A / mm 2 , the secondary coil electric density △Ia is 9.0-9.5A / mm 2 .

[0065] In the high and low voltage overload simulation test, the output power P out Under the same conditions, the motor main coil electrical density △Im in the embodiment is smaller than the motor main coil electrical density △Im in the comparative example, and the motor auxiliary coil electrical density △Ia in the embodiment is smaller than the motor auxiliary coil electrical density △Ia in the comparative example. Since electrical density is inversely proportional to temperature rise, the motor temperature rise in the embodiment is significantly improved compared with the motor temperature rise in the comparative example.

[0066] The embodiment of the present application further provides a compressor, comprising the above-mentioned motor. The compressor is applied to a refrigerator, an air conditioner, a freezer or a heat pump water heater, etc., without limitation thereto.

[0067] In summary, the present invention provides a motor and a compressor, wherein the motor at least satisfies 5.4<(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R)≤1.2, the magnetic flux density distribution of the motor is more reasonable and the probability of adverse problems can be reduced.

[0068] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A motor, characterized in that: The motor comprises a motor stator and a motor rotor, wherein the motor rotor is arranged inside the motor stator, a plurality of first slots are opened along its circumference, and a plurality of second slots are opened along its circumference, and the motor satisfies at least one of the following formulas: 5.4≤(Q1*T S ) / H C1 ≤6.0,3.5≤(Q2*T R ) / H C2 ≤4.1,0.9≤(Q1*T S ) / (Q2*T R )≤1.2; Wherein, Q1 is the number of the first slots, Q2 is the number of the second slots, T S is the average tooth width of the first slot, T R is the average tooth width of the second slot, H C1 is the average slot yoke width of the first slot, H C2 is the distance between the second slot and the center of the motor rotor.

2. The motor according to claim 1, characterized in that The motor at least meets the following requirements: 5.55<(Q1*T S ) / H C1 ≤6.

0.

3. The motor according to claim 1, characterized in that The motor at least meets: (Q1*T S ) / H C1 =5.49, 5.55, 5.58, 5.72 or 5.

73.

4. The motor according to claim 1, characterized in that The motor at least meets the following requirements: (Q2*T R ) / H C2 =3.63, 3.76 or 4.

00.

5. The motor according to claim 1, characterized in that The calculation formula of the average yoke width of the first slot is: H C1 =(H C11 *Q 11 +H C12 *Q 12 +…+H C1i *Q 1i ) / Q1; Among them, H C1i is the slot yoke width of the first slot hole of the i-th type, the slot yoke widths of the first slot holes of the same type are equal, Q 1i is the number of the first slots of the i-th type.

6. The motor according to claim 1, characterized in that The distances between all the second slots and the center of the motor rotor are equal.

7. The motor according to claim 1, characterized in that The motor rotor and the motor stator are both made of electrical steel coils, and the thickness of the electrical steel coils is 0.35-0.5 mm.

8. The motor according to claim 7, characterized in that The magnetic induction intensity B of the electrical steel coil 50 ≥1.76T.

9. The motor according to claim 1, characterized in that The second slot is a cast aluminum slot or a cast copper slot.

10. A compressor, characterized in that: A motor comprising any one of claims 1 to 9.

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