Patent Application
20240223028
This application claims foreign priority benefits under 35 U.S.C. § 119 from Chinese Patent Applications No. 202211721190.7, filed Dec. 30, 2022, and No. 202223605034.2, filed Dec. 30, 2022, the content of each of which is hereby incorporated by reference in its entirety.
The present disclosure relates to a field of motor technology, and in particular, to a stator lamination of an induction motor, an induction motor having the stator lamination, a compressor having the induction motor, and a refrigeration device having the compressor.
An induction motor is a device for generating induction current in a rotor of the induction motor to achieve energy conversion through electromagnetic induction effect between a stator of the induction motor and the rotor. the induction motor is widely applied to various devices including a compressor of a refrigeration device due to its merits, such as, simple structure, low cost, high efficiency, high reliability, easier miniaturization, etc.
In view of the above, the present disclosure provides a stator lamination of an induction motor, an induction motor having the stator lamination, a compressor having the induction motor and a refrigeration device having the compressor.
In an aspect, the present disclosure provides a stator lamination of an induction motor. The stator lamination is annular. An inner circumference of the stator lamination is provided with a plurality of stator teeth and a plurality of stator slots. The plurality of stator teeth and the plurality of stator slots are arranged alternately. The stator lamination defines a stator inner diameter D1. The number of the plurality of stator slots is Q1. Each stator slot defines a stator slot depth H1. The stator slot depth H1 meets a formula:
Q1 is greater than or equal to 24, the value range of D1 may be from 95 mm to 105 mm, and the value range of k may be from 1.95 to 2.05. According to this configuration, the material cost of the induction motor can be reduced while the induction motor may achieve a target efficiency.
In a possible implementation, the stator inner diameter D1 is substantially equal to 100.1 mm.
In a possible implementation, the stator lamination is made of silicon steel.
In a possible implementation, each stator tooth defines a stator tooth width T1, and a ratio of the stator slot depth H1 to the stator tooth width T1, which is H1/T1, ranges from 3.8 to 4.0. According to this configuration, the material cost of the induction motor can be further reduced on the basis of ensuring that the induction motor achieves the target efficiency.
In another aspect, the present disclosure further provides an induction motor. The induction motor includes: an output shaft; a rotor, drivably connected to the output shaft, including a rotor core, the rotor core comprising a plurality of rotor laminations stacked arranged along an axial direction; and a stator, arranged on an outer circumference side of the rotor, comprising a stator core and a stator winding wound on the stator core, the stator core comprising a plurality of stator laminations, each one of which is the stator lamination described in the above aspect, stacked along an axial direction.
In a possible implementation, an outer circumference of each rotor lamination is provided with a plurality of rotor teeth and a plurality of rotor slots, the plurality of rotor teeth and the plurality of rotor slots are arranged alternately. Each rotor slot defines a rotor slot depth H2, each rotor tooth defines a rotor tooth width T2, and a ratio of the rotor slot depth H2 to the rotor tooth width T2, which is H2/T2, ranges from 5.7 to 6.1. According to this configuration, the material cost of the induction motor can be further reduced while the induction motor can achieve a target efficiency.
In a possible implementation, the plurality of rotor laminations are made of silicon steel.
In another aspect, the present disclosure further provides a compressor. The compressor includes: a shell, defining a low-pressure chamber and a high-pressure chamber therein, and provided with a suction inlet and a discharge outlet respectively communicated with the low-pressure chamber and the high-pressure chamber; a compressing mechanism, disposed in the low-pressure chamber, and including an orbiting scroll and a fixed scroll that cooperate with each other; and the induction motor as described in the above aspect, disposed in the low-pressure chamber. The output shaft of the induction motor is movably connected to the orbiting scroll to drive the orbiting scroll to move relative to the fixed scroll, so that the compression mechanism compresses the fluid in the low-pressure chamber and discharges the compressed fluid into the high-pressure chamber.
In a possible implementation, the stator winding forms a first winding assembly and a second winding assembly respectively at two ends of the stator core in an axial direction of the stator core. A distance between a centerline of the suction inlet and a midline of the first winding assembly in the axial direction is less than or equal to 10 mm, or a distance between the centerline of the suction inlet and a midline of the second winding assembly in the axial direction is less than or equal to 10 mm. According to this implementation, the stator winding will be cooled relatively efficiently by utilizing the fluid entering from the suction inlet. Therefore, this implementation is beneficial to heat dissipation of the induction motor.
In another aspect, the present disclosure further provides a refrigeration device which includes the compressor provided in the above aspect.
In order to illustrate technical solutions in embodiments of the present disclosure more clearly, the accompanying drawings to be used in the embodiments will be briefly described below.
It should be understood that the following drawings illustrate only certain embodiments of the present disclosure and are therefore not to be regarded as limiting the scope.
It should be understood that the same or similar reference numerals are used in the drawings to represent the same or similar elements (components or portions).
It should be understood that the drawings are only schematic, and the dimensions and proportions of elements (components or portions) in the figures are not necessarily precise.
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. The described embodiments are a part of embodiments of the present disclosure rather than all of the embodiments.
The induction motor 100 includes a stator and a rotor. The stator is arranged on the outer circumference side of the rotor. The output shaft 100a of the induction motor 100 is drivably connected to the rotor so as to rotate along with the rotor. The stator includes a stator core 10 and a stator winding (not shown) wound on the stator core 10. The rotor includes a rotor core 20. In certain embodiments, the rotor may also include a rotor winding (not shown) wound on the rotor core 20.
When the induction motor 100 is in operation, a rotating magnetic field is generated through the current of the stator winding. The rotating magnetic field interacts with an induced current in the rotor to generate an electromagnetic torque. The electromagnetic torque causes the rotor to rotate and thereby drives the output shaft 100a to rotate, thereby converting the electric energy into the torque output by the output shaft 100a.
The stator core 10 includes a plurality of annular stator laminations 11 stacked along the axial direction of the induction motor 100. In the present disclosure, the axial direction of the induction motor 100 may refer to the extension direction of the axis A of the output shaft 100a. The material of the stator laminations 11 are not particularly limited in the present disclosure. For example, the stator laminations 11 may be made of silicon steel. In addition, the number of the stator laminations 11 is not particularly limited in the present disclosure.
The annular stator lamination has a stator inner diameter D1, the value of the stator inner diameter D1 ranges from 95 mm to 105 mm. In an embodiment, the stator inner diameter D1 is substantially equal to 100.1 mm. The number of the plurality of stator slots is Q1, Q1 may be greater than or equal to 24. Each stator slot has a stator slot depth H1, and the stator slot depth H1 may meet a formula:
In this formula, the value of k may range from 1.95 to 2.05. According to this configuration, the material cost of the induction motor 100 may be reduced while the induction motor 100 may achieve target efficiency. In addition, the slot height Hs of the stator need not be too large, otherwise, under the same stator outer diameter and the stator inner diameter, the stator yoke thickness may become smaller, the stator rigidity may be affected, and vibration and noise may be affected.
It should be understood that, for example, the stator slot depth H1 may be a size of the stator slot 11b in the radial direction.
Referring again to
It should be understood that the meaning of the stator tooth width is known to those having ordinary skill in the art. Exemplarily, the stator tooth width T1 may refer to a distance between two opposite side surfaces of the stator tooth 11a in the circumferential direction at the middle of the stator tooth 11a.
Referring again to
Each rotor tooth 21a has a rotor tooth width T2, and each rotor slot 21b has a rotor slot depth H2. The ratio of the rotor slot depth H2 to the rotor tooth width T2 may range from 5.7 to 6.1. According to this configuration, the material cost of the induction motor 100 may be further reduced while the induction motor 100 may reach a target efficiency.
It should be understood that the meanings of the rotor tooth width and the rotor slot depth are known to those person having ordinary skill in the art. Exemplarily, the rotor tooth width T2 may refer to the distance between two opposite side surfaces of the rotor tooth 21a in the circumferential direction at the middle of the rotor tooth 21a, and the rotor slot depth H2 may refer to the size of the rotor slot 21b in the radial direction.
It may be learned from
Other embodiments of the present disclosure further provide a compressor, which includes the induction motor provided by the present disclosure. The compressor provided by the present disclosure may be applied to a refrigeration device. Certainly, the compressor provided by the present disclosure may also be applied to other devices, and this is not particularly limited in the present disclosure. The compressor provided by an embodiment of the present disclosure is described below by way of example with reference to the accompanying drawings.
Referring to
In an embodiment, the compressor 200 further includes a compression mechanism 220, and the compression mechanism includes an orbiting scroll 221 and a fixed scroll 222, which cooperate with each other to achieve fluid compression. The induction motor 100 is located in the low-pressure chamber 210a, and the output shaft 100a of the induction motor 100 is movably connected to the orbiting scroll 221 to drive the orbiting scroll 221 to move relative to the fixed scroll 222, so that the compression mechanism 220 compresses the fluid in the low-pressure chamber 210a and discharges the compressed fluid into the high-pressure chamber 210b. In one example, the output shaft 100a of the induction motor 100 may be an eccentric crankshaft.
In an embodiment, the induction motor 100 may include a stator winding wound on the stator core 10. A first winding assembly 31 and a second winding assembly 32 are respectively formed at two ends of the stator core 10 in the axial direction of the stator core 10, and the first winding assembly 31 may also be referred to as an upper winding assembly, and the second winding assembly 32 may also be referred to as a lower winding assembly.
The suction inlet 210c may be close to the first winding assembly 31, specifically, the suction inlet 210c may define/have a center line C, and the first winding assembly 31 may define/have a center line M1, wherein in the axial direction, the distance L between the center line C of the suction inlet 210c and the center line M1 of the first winding assembly 31 may be less than or equal to 10 mm. In this way, the fluid entering from the suction inlet 210c can be relatively efficiently utilized to cool the stator winding 30 (i.e., mainly the first winding assembly 31 of the stator winding 30). Therefore, this implementation is beneficial to heat dissipation of the induction motor 100.
It should be noted that the midline M1 may be an imaginary line that is located substantially in the middle of the first winding assembly 31 in the axial direction. In other words, in the axial direction, the distance from the upper end of the first winding assembly 31 to the center line M1 is substantially equal to the distance from the lower end of the first winding assembly 31 to the center line M1. It should be understood that, although the center line M1 in
As an alternative implementation, the suction inlet 210c may also be close to the second winding assembly 32, and the second winding assembly 32 may define a center line M2, wherein in the axial direction, the distance between the center line C of the suction inlet 210c and the center line M2 of the second winding assembly 32 may be less than or equal to 10 mm. In this way, the fluid entering from the suction inlet 210c can be relatively efficiently utilized to cool the stator winding 30 (i.e., mainly the second winding assembly 32 in this example). Therefore, this implementation is beneficial to heat dissipation of the induction motor 100.
It should be noted that the center line M2 of the second winding assembly 32 may be an imaginary line that is located substantially in the middle of the second winding assembly 32 in the axial direction. In other words, in the axial direction, the distances from the center line M2 to the upper end and the lower end of the second winding assembly 32 may be substantially equal.
Other embodiments of the present disclosure further provide a refrigeration device, which may include the compressor provided by the present disclosure. The refrigeration device provided by the present disclosure may be, for example, but not limited to, an air conditioner or a refrigerator.
It should be understood that the term “comprising” and its variations in the present disclosure are open, that is, they are mean “including but not limited to”. The term “one embodiment” means “at least one embodiment”, and the term” another embodiment “means” at least one further embodiment”.
It should be noted that the specific technical features (elements) described in the specific embodiments can be combined in any suitable mode without contradiction, and in order to avoid unnecessary repetition, the present disclosure no longer indicates various possible combination mode.
It should be understood that multiple members and/or portions can be provided by a single integrated member or portion. Alternatively, a single integrated member or portion may be divided into separate plurality of members and/or portions. “a” or “an” is used to describe the members or portions and is not said to exclude other components or portions.
The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto, and any person having ordinary skill in the art could conceive of changing or replacing within the technical scope disclosed in the present disclosure, and should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the invention shall be subject to the protection scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202211721190.7 | Dec 2022 | CN | national |
| 202223605034.2 | Dec 2022 | CN | national |
