Motor and compressor

Abstract

The utility model 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 technical field of electric machines, in particular to an electric machine and a compressor. BACKGROUND

[0002] Currently, compressors used in the fields of air conditioners, heat pumps and the like usually adopt single-phase and three-phase induction machines, wherein a plurality of stator winding slot holes are arranged on the stator of the electric machine, and a plurality of rotor cast aluminum (copper) slot holes are arranged on the rotor of the electric machine. Since the design of the stator and rotor slot holes has a great influence on the cogging torque, air gap and leakage coefficient, winding embedding and cast aluminum (copper) process, copper / aluminum material cost and the like, if the above slot hole design is unreasonable, it will lead to unreasonable magnetic flux density distribution of the magnetic circuit of the electric machine, and further cause various adverse problems of the electric machine. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application includes, for example, providing an electric machine with reasonable magnetic flux density distribution of the magnetic circuit, and reducing the probability of adverse problems.

[0004] The purpose of the present application also includes providing a compressor, wherein the magnetic flux density distribution of the magnetic circuit of the electric machine is reasonable, and the probability of adverse problems of the electric machine is reduced.

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

[0006] An embodiment of the present application provides an electric machine, which comprises an electric machine stator and an electric machine rotor, the electric machine rotor is arranged inside the electric machine stator, a plurality of first slot holes are arranged on the electric machine stator along the circumferential direction of the electric machine stator, a plurality of second slot holes are arranged on the electric machine rotor along the circumferential direction of the electric machine rotor, and the electric machine at least meets 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 slot holes, Q2 is the number of the second slot holes, T S is the average tooth width of the first slot holes, T R is the average tooth width of the second slot holes, H C1 is the average slot yoke width of the first slot holes, H C2 is the distance between the second slot holes and the center of the electric machine rotor.

[0009] Optionally, the electric machine at least meets 5.55 < (Q1*T S ) / HC1 ≤ 6.0.

[0010] Optionally, the average yoke width of the first slot hole is calculated by the following formula:

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

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

[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 the second slot holes are equal in distance from the center of the motor rotor.

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

[0017] Optionally, the magnetic induction intensity B 50 of the electrical steel coil is greater than or equal to 1.76 T.

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

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

[0020] The motor and the compressor provided by the application have the following advantages, for example: in order to make the magnetic circuit magnetic density distribution of the motor reasonable and reduce the probability of occurrence of adverse problems, a motor is designed, the motor comprises a motor stator and a motor rotor, the motor rotor is arranged in the interior of the motor stator, the motor stator is provided with a plurality of first slot holes along the circumferential direction of the motor stator, the motor rotor is provided with a plurality of second slot holes along the circumferential direction of the motor rotor, and the motor at least satisfies 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 first slots, Q2 is the number of second slots, T S is the average tooth width of the first slots, T R is the average tooth width of the second slots, H C1 is the average slot yoke width of the first slots, H C2 is the distance from the second slots to the center of the motor rotor, in the case that the motor at least meets one of the above formulas, the magnetic circuit flux density distribution of the motor is reasonable, and the probability of occurrence of adverse problems can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 is a schematic diagram for showing the cooperation of the motor stator and the motor rotor in the embodiments of the present application;

[0023] Figure 2 is a schematic diagram of the motor stator in the embodiments of the present application;

[0024] Figure 3 is a schematic diagram of the motor rotor in the embodiments of the present application;

[0025] Figure 4 is a curve diagram for showing the change of motor efficiency with power in the embodiments of the present application;

[0026] Figure 5 is a curve diagram for showing the change of main coil electric density with output power in the low voltage test in the embodiments of the present application;

[0027] Figure 6 is a curve diagram for showing the change of auxiliary coil electric density with output power in the low voltage test in the embodiments of the present application;

[0028] Figure 7 is a curve diagram for showing the change of main coil electric density with output power in the high voltage test in the embodiments of the present application;

[0029] Figure 8 is a curve diagram for showing the change of auxiliary coil electric density with output power in the high voltage test in the embodiments of the present application.

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

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings 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 claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0033] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0037] The inventors of the present application found that since the design of the stator and rotor slot holes has a great influence on the cogging torque, air gap and leakage coefficient, winding embedding line and casting aluminum (copper) process, copper / aluminum material cost, etc., if the above slot hole design is unreasonable, it will lead to unreasonable magnetic flux density distribution of the motor, and further lead to adverse problems such as increase of motor excitation current, reduction of power factor, low efficiency of motor, high temperature rise and poor noise, etc. The embodiments of the present application provide a motor, at least for solving the above technical problems.

[0038] Please refer toFigures 1-3 The motor provided by the embodiment of the application comprises a motor stator 100 and a motor rotor 200, the motor rotor 200 is arranged inside the motor stator 100, a plurality of first slot holes 110 are arranged on the motor stator 100 along the circumferential direction of the motor stator 100, a plurality of second slot holes 210 are arranged on the motor rotor 200 along the circumferential direction of the motor rotor 200, and the motor at least meets 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 slot holes 110, Q2 is the number of the second slot holes 210, T S is the average tooth width of the first slot holes 110, T R is the average tooth width of the second slot holes 210, H C1 is the average slot yoke width of the first slot holes 110, H C2 is the distance between the second slot holes 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 slot holes 110 are close to the inner side edge of the motor stator 100, and the plurality of second slot holes 210 are close to the outer side edge of the motor rotor 200.

[0040] It should be noted that the average tooth width of the first slot holes 110 refers to the average value of the spacing between adjacent two first slot holes 110, the average tooth width of the second slot holes 210 refers to the average value of the spacing between adjacent two second slot holes 210, the slot yoke width of the first slot holes 110 refers to the distance between the first slot holes 110 and the outer side edge of the motor stator 100, the average slot yoke width of the first slot holes 110 refers to the average value of the distance between all the first slot holes 110 and the outer side 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] In the case that the motor at least meets 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, the magnetic circuit magnetic density distribution of the motor is relatively reasonable, and the probability of occurrence of adverse problems can be reduced.

[0042] In the case that the motor at least meets 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 The case where )≤1.2 includes the case where 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 satisfies 0.9≤(Q1*T) S ) / (Q2*T R )≤1.2, or the motor 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 Two of the conditions ≤ 1.2, or the motor simultaneously 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.

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

[0044] The motor must at least satisfy 5.55 < (Q1*T) S ) / H C1 Cases ≤6.0 include: the motor only satisfies 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 satisfies 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 RTwo of the following conditions must be met: 5.55 < (Q1*T) ≤ 1.2, or the motor must simultaneously satisfy 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 must at least satisfy: (Q2*T) R ) / H C2 = 3.63, 3.76 or 4.00.

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

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

[0048] In the embodiments of this application, the formula for calculating the average tooth width of the first slot 110 is: T S =(T S1 +T S2 +…+T Si ) / Q1, where T Si The tooth width is the distance between any two adjacent first slots 110.

[0049] It should be noted that the tooth width between any two adjacent first slots 110 is the distance between any two adjacent first slots 110, and the average tooth width of the first slots 110 is the tooth width between any two adjacent first slots 110 when the tooth widths between any two adjacent first slots 110 are equal.

[0050] In the embodiments of the present application, the average tooth width of the second slots 210 is calculated according to the formula: T R R1 +T R2 +…+T Ri ) / Q2, wherein T Ri 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 slots 210 is the distance between any two adjacent second slots 210, and the average tooth width of the second slots 210 is the tooth width between any two adjacent second slots 210 when the tooth widths between any two adjacent second slots 210 are equal.

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

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

[0054] In the embodiments of the present application, the magnetic induction intensity B 50 of the electrical steel coils is greater than or equal to 1.76T.

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

[0056] In the embodiments of the present application, the second slots 210 are cast aluminum slots or cast copper slots, and aluminum and copper are good conductive materials, which can reduce the wire resistance of the motor rotor 200 winding and improve the conductivity of the motor.

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

[0058] In the embodiments, the motor at least satisfies 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 one of the above formulas.

[0059] Please refer to Figure 4 , in terms of motor efficiency, for single-phase constant-speed full-copper-wire motors, under the condition that the motor power is the same, the motor efficiency in the embodiment is greater than that in the comparative example.

[0060] Exemplarily, under the condition that 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%; under the condition that 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%; under the condition that 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 Figures 5-8 , in terms of temperature rise improvement, for single-phase constant-speed full-aluminum-wire motors, under the condition that the output power P out is the same, the motor main coil current density △Im in the embodiment is less than that in the comparative example, and the motor auxiliary coil current density △Ia in the embodiment is less than that in the comparative example.

[0062] Exemplarily, under the condition that the output power P out is 2300w in the low-voltage overload simulation test, the motor main coil current density △Im in the embodiment is between 7.0-8.0A / mm 2 , and the auxiliary coil current density △Ia is between 5.0-5.2A / mm 2 ; the motor main coil current density △Im in the comparative example is between 8.0-9.0A / mm 2 , and the auxiliary coil current density △Ia is between 5.4-5.6A / mm 2 ; under the condition that the output power P out is 2500w, the motor main coil current density △Im in the embodiment is between 8.0-9.0A / mm 2 , and the auxiliary coil current density △Ia is between 5.0-5.2A / mm 2 ; the motor main coil current density △Im in the comparative example is between 10.0-11.0A / mm 2 , and the auxiliary coil current density △Ia is between 5.2-5.4A / mm 2 .

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

[0064] For example, in a high-voltage overload simulation test, the output power P out With a power rating of 2100W, the main coil current density ΔIm of the motor in this embodiment is 5.5-6.5 A / mm. 2 The secondary coil current density ΔIa is 7.0-7.5 A / mm². 2 In the comparative example, the current density ΔIm of the motor's main coil is 7.5-8.5 A / mm. 2 The secondary coil current density ΔIa is 9.5-10.0 A / mm². 2 Output power P out In the case of 2500W, the current density ΔIm of the main coil of the motor in the embodiment is 6.5-7.5A / mm. 2 The secondary coil current density ΔIa is 7.0-7.5 A / mm². 2 In the comparative example, the current density ΔIm of the motor's main coil is 8.5-9.5 A / mm. 2 The secondary coil current density ΔIa is 9.0-9.5 A / mm². 2 .

[0065] In high and low voltage overload simulation tests, the output power P out Under the same conditions, the main coil current density ΔIm of the motor in the embodiment is less than that of the main coil current density ΔIm of the motor in the comparative example, and the secondary coil current density ΔIa of the motor in the embodiment is less than that of the secondary coil current density ΔIa of the motor in the comparative example. Since current density is inversely proportional to temperature rise, the motor temperature rise in the embodiment is significantly improved compared to the motor temperature rise in the comparative example.

[0066] Embodiments of this application also provide a compressor, including the aforementioned motor. This compressor can be applied to refrigerators, air conditioners, freezers, or heat pump water heaters, etc., and is not limited thereto.

[0067] In summary, the embodiments of this application provide 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 RIf the motor satisfies one of the following formulas: Bm≤1.2, Bm≤1.1, Bm≤1.0, Bm≤0.9, Bm≤0.8, Bm≤0.7, Bm≤0.6, Bm≤0.5, Bm≤0.4, Bm≤0.3, Bm≤0.2, Bm≤0.1, Bm≤0.05, Bm≤0.01, the magnetic flux density distribution of the motor is reasonable, and the probability of occurrence of adverse problems can be reduced.

[0068] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electric machine characterized in that, The motor comprises a motor stator and a motor rotor, the motor rotor is arranged inside the motor stator, a plurality of first slot holes are arranged on the motor stator along the circumferential direction of the motor stator, a plurality of second slot holes are arranged on the motor rotor along the circumferential direction of the motor rotor, and the motor at least meets one of the following formulas: 5.4 <= (Q1*T S ) / H C1 <= 6.0, 3.5 <= (Q2*T R ) / H C2 <= 4.1, and 0.9 <= (Q1*T S ) / (Q2*T R ) <= 1.

2. wherein Q1 is the number of the first slot holes, Q2 is the number of the second slot holes, T S is the average tooth width of the first slot holes, T R is the average tooth width of the second slot holes, H C1 is the average slot yoke width of the first slot holes, H C2 is the distance from the second slot holes to the center of the motor rotor.

2. The electric machine of claim 1, wherein, The electric motor at least satisfies: 5.55 < (Q1*T S ) / H C1 ≤ 6.

0.

3. The electric machine of claim 1, wherein, The electric motor at least satisfies: (Q1*T S ) / H C1 = 5.49, 5.55, 5.58, 5.72 or 5.

73.

4. The electric machine of claim 1, wherein, The motor at least satisfies: (Q2*T R ) / H C2 = 3.63, 3.76 or 4.

00.

5. The electric machine of claim 1, wherein, The average yoke width of the first slot is calculated by the following formula: H C1 = (H C11 * Q 11 + H C12 * Q 12 +... + H C1i * Q 1i ) / Q1; wherein H C1i is the slot yoke width of the first slot hole of the i-th class, the slot yoke widths of the first slot holes of the same class are equal, Q 1i is the number of the first slot holes of the i-th class.

6. The electric machine of claim 1, wherein, All the second slots have the same distance to the center of the motor rotor.

7. The electric machine of claim 1, wherein, Both the motor rotor and the motor stator are made of electrical steel coil, and the thickness of the electrical steel coil is 0.35-0.5mm.

8. The electric machine of claim 7, wherein, The magnetic induction B of the electrical steel strip 50 ≥ 1.76 T.

9. The electric machine of claim 1, wherein, The second slots are cast aluminum slots or cast copper slots.

10. A compressor characterized by, The motor comprises the motor rotor and the motor stator.

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