Stator winding of alternating current motor

Abstract

The invention relates to the technical field of motor windings, in particular to an alternating current motor stator winding which comprises a stator, a plurality of winding grooves are formed in the inner side of the stator at equal intervals, a winding winding is arranged in each winding groove, and an inner ring frame and an outer ring frame are arranged at the positions, corresponding to inner and outer wire heads of the winding windings, above the stator. Fixing holes are formed in the positions, corresponding to the wire ends, of the inner ring frame and the outer ring frame, the wire ends penetrate into the fixing holes in the corresponding positions, copper bars are fixed to the positions, close to the fixing holes, in the inner ring frame and the outer ring frame, the copper bars in the fixing holes are exposed, and the wire ends abut against and are fixed to the copper bars in the fixing holes in the corresponding positions. The wire ends of the adjacent winding windings are connected through the inner ring frame and the outer ring frame, the winding windings at the needed positions can be connected by making contact with the copper strips in the inner ring frame and the outer ring frame, when the wire ends do not make contact with the copper strips, a communication circuit is not formed, welding or crimping is not needed during connection, and connection is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of motor windings, and in particular to an alternating current motor stator winding. Background Art

[0002] The stator winding of the AC motor generates a rotating magnetic field, interacts with the rotor to transfer energy, and realizes electromechanical energy conversion. Its design directly affects the motor's efficiency, power factor, starting torque multiple, starting current multiple, maximum torque multiple, temperature rise and other performance, and determines the main material cost of the motor.

[0003] The conductor materials of the stator winding include copper or aluminum wire with a circular cross-section, and copper and aluminum flat wire with a rectangular cross-section. When winding the flat wire, it is passed through the stator winding slot. Multiple groups of flat wires need to be connected to form a complete winding. In addition to the short-circuiting method of the cage winding, the connection of the winding winding generally brings the wire ends of adjacent windings close to each other, and then connects them by soldering or crimping. After soldering, it is also necessary to brush or dip insulating paint, which requires a large amount of work. Especially when the windings are dense, the welding or crimping operation space is very small, and other windings cannot be opened, otherwise other windings may be deformed and dislocated. Therefore, it is a great test of the operator's skills. The dense winding also increases the number of welding or crimping, which increases the workload. Summary of the invention

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0005] An AC motor stator winding comprises a stator, wherein a plurality of winding grooves with equal spacing are provided on the inner side of the stator, a winding is arranged in each of the winding grooves, two wire ends are reserved on the winding, the two wire ends extend out of the winding grooves of the stator, the two wire ends of the winding are staggered inside and outside, an inner ring frame and an outer ring frame are provided above the stator at positions corresponding to the inner and outer wire ends of the winding, fixing holes are provided on the inner ring frame and the outer ring frame at positions corresponding to the wire ends, the wire ends are inserted into the fixing holes at corresponding positions, copper bars are fixed in the inner ring frame and the outer ring frame near the fixing holes, and the wire ends are fixed against the copper bars in the fixing holes at corresponding positions.

[0006] Furthermore, the length and width of the fixing hole are larger than the length and width of the wire head, and a fixing buckle is installed in the fixing hole, and the fixing buckle includes a first plug buckle and a second plug buckle, a conductive sheet is fixedly installed on the side of the copper bar on the first plug buckle, and an insulating sheet is fixedly installed on the side of the copper bar on the second plug buckle, and the first plug buckle and the second plug buckle are inserted into the fixing hole outside the wire head to form a fixation, and the wire head and the copper bar are electrically connected through the conductive sheet. Depending on whether the wire head is connected to the copper bar, the first plug buckle or the second plug buckle can be used to fix the wire head with circuit connection or circuit disconnection, and the conductive sheet contacts the copper bar and the wire head at the same time, that is, the circuit is connected, and the insulating sheet contacts the copper bar and the wire head at the same time, even if the circuit is disconnected.

[0007] Furthermore, cover plates are fixed to the tops of the first snap fastener and the second snap fastener respectively. Two lead wires are connected to both the inner ring frame and the outer ring frame. One end of each lead wire is fixedly connected to the copper bars inside the inner ring frame and the outer ring frame at the corresponding positions. The cover plates can cover the gaps between the fixing holes and the fixing buttons, reducing the entry of dust.

[0008] Furthermore, a bottom ring frame is arranged above the stator corresponding to the positions of the wire heads of the winding. Threading holes are provided in the bottom ring frame corresponding to the positions of the respective wire heads. The wire heads pass through the bottom ring frame at the corresponding positions, and the winding is fixed through the bottom ring frame. The inner ring frame and the outer ring frame are installed at the positions corresponding to the inner and outer wire heads on the bottom ring frame. The bottom ring frame fixes the winding and provides a fixing foundation for the inner ring frame and the outer ring frame at the same time.

[0009] Furthermore, at the other end of the winding away from the wire heads below the stator, a winding fixing frame is installed. The winding fixing frame includes an inner ring sleeve and an outer ring sleeve. The outer side of the inner ring sleeve is closely adjacent to the inner side of the winding at the corresponding position, and the inner side of the outer ring sleeve is closely adjacent to the outer side of the winding at the corresponding position. A first partition block is fixed at the position on the outer side of the inner ring sleeve corresponding to the adjacent winding, and a second partition block is fixed at the position on the inner side of the outer ring sleeve corresponding to the adjacent winding. The bottom parts of the inner ring sleeve and the outer ring sleeve are fixed through a fixing strip. The inner ring sleeve and the outer ring sleeve are suitable for use when the winding outside the stator is relatively long, and can provide good fixing and insulation protection for the winding outside the stator. When the winding outside the stator is left relatively short, relying on the winding slots of the stator and the toughness of its own material, the winding can obtain sufficient self-stability, and at this time, the inner ring sleeve and the outer ring sleeve can be not provided.

[0010] Furthermore, a first ventilation hole is provided at the position between the adjacent first partition blocks on the inner ring sleeve, a second ventilation hole is provided at the position between the adjacent second partition blocks on the outer ring sleeve, and insulating paper is arranged in the winding between the inner ring sleeve and the outer ring sleeve. The ventilation holes enable a larger circulation area between the air inside the winding and the outside air. Due to the setting of the inner ring sleeve and the insulating paper, there may be a relatively large blockage to the inner winding, so the inner diameter of the inner ring sleeve needs to be greater than the inner diameter of the stator to obtain a gap for air flow.

[0011] Furthermore, the first partition block and the second partition block are silicone rubber blocks, and the inner ring sleeve, the outer ring sleeve and the fixing strip are all made of non-metallic materials. Silicone rubber has good insulation performance and high heat resistance, and is suitable for motors with high-temperature working environments. At the same time, the first snap fastener, the second snap fastener, the cover plate, the inner ring frame, the outer ring frame and the bottom ring frame are all made of non-conductive materials to maintain the overall insulation and avoid interference with the winding.

[0012] Further, the winding includes winding one and winding two, which are alternately arranged. The difference in the number of turns between winding one and winding two is one. The sum of the number of turns of winding one and winding two is equal to the total number of turns of the motor stator winding.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. In the present invention, the inner and outer ring frames are used to connect the wire ends of adjacent windings. When the wire ends contact the copper bars in the inner and outer ring frames, the windings at the required positions can be connected. When the wire ends do not contact the copper bars, a connected circuit is not formed. Welding or crimping is not required during connection, which facilitates the connection.

[0015] 2. In the present invention, the connection between the wire ends and the inner and outer ring frames is fixed by fixing buckles. At the same time, the fixing buckles are divided into two types: those with conductive sheets and those with insulating sheets. During use, the corresponding type of fixing buckle can be selected according to specific needs. This not only facilitates the fixing of the wire ends and the circuit connection, but also ensures flexibility.

[0016] 3. In the present invention, inner and outer ring sleeves are provided to fix the windings that extend relatively long from the stator, which can well protect the windings and prevent the insulating paint on the surface of the windings from being worn.

[0017] 4. Ventilation holes are provided on both the inner and outer ring sleeves. While the inner and outer ring sleeves fix the windings, the air inside and outside the windings can still circulate effectively, thereby ensuring heat dissipation.

[0018] 5. In the present invention, the stator winding is set into two groups with different numbers of turns, which can make the equivalent number of turns of a single coil of the stator winding an integer + half turn, and can finely adjust the performance of the motor, such as efficiency, power factor, starting torque multiple, starting current multiple, maximum torque multiple, temperature rise, etc. Description of the Drawings

[0019] Figure 1 is a perspective view of Embodiment 1 of the present invention;

[0020] Figure 2 is a cross-sectional view of Embodiment 1 of the present invention;

[0021] Figure 3 is a schematic diagram of the arrangement of the winding in Embodiment 1 of the present invention;

[0022] Figure 4 is a perspective view of the winding in Embodiment 1 of the present invention;

[0023] Figure 5 is a perspective view of Embodiment 2 of the present invention;

[0024] Figure 6 is an enlarged view of part A in Embodiment 2 of the present invention;

[0025] Figure 7 It is a three-dimensional view of the fixed buckle in the second embodiment of the present invention;

[0026] Figure 8 It is a three-dimensional view of the third embodiment of the present invention;

[0027] Figure 9 It is an enlarged view of part B in the third embodiment of the present invention;

[0028] Figure 10 It is a three-dimensional view of the inner ring sleeve in the third embodiment of the present invention;

[0029] Figure 11 It is a three-dimensional view of the outer ring sleeve in the third embodiment of the present invention.

[0030] Reference numerals: 1, stator; 11, winding slot; 2, winding; 21, lead wire; 210, winding one; 220, winding two; 3, bottom ring frame; 31, wire passing hole; 32, inner ring frame; 33, outer ring frame; 34, copper bar; 35, lead wire; 36, fixing hole; 4, fixing buckle; 41, plug buckle one; 42, plug buckle two; 43, cover plate; 44, conductive sheet; 45, insulating sheet; 5, winding fixing frame; 51, inner ring sleeve; 52, partition block one; 53, outer ring sleeve; 54, partition block two; 55, insulating paper; 56, ventilation hole one; 57, ventilation hole two; 58, fixing bar. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] This application provides an AC motor stator winding, which mainly solves the problems of large welding or crimping connection workload in the current motor flat wire winding and inconvenient operation when the winding is relatively dense, and provides the following technical solutions, which will be described in detail below in combination with Figure 1 - Figure 11 for detailed description:

[0033] Embodiment 1, please refer to Figure 1 and 4 , an AC motor stator winding, including a stator 1, a plurality of equally spaced winding slots 11 are provided inside the stator 1, a winding 2 is provided in each winding slot 11, the winding 2 includes a winding one 210 and a winding two 220, the winding one 210 and the winding two 220 are arranged alternately, the difference in the number of turns between the winding one 210 and the winding two 220 is one, two lead wires 21 are reserved on the winding 2, the two lead wires 21 extend out of the winding slots 11 of the stator 1, and the two lead wires 21 of the winding 2 are arranged offset inside and outside.

[0034] All stator coils of a traditional designed alternating current motor adopt the same integral number of turns. When adjusting the motor design scheme, the number of turns is adjusted in integers. For some situations where fine-tuning of performance is required, all aspects of performance need to be balanced, cost control is relatively strict, and the number of turns of the stator coils is very small itself, when the number of turns is adjusted in integers, it has a greater impact on the impedance, magnetic flux, and loss of the motor winding. By setting the stator winding into two groups with different numbers of turns, the equivalent number of turns of a single coil of the stator winding can be an integer + half turn, which can finely adjust the performance of the motor such as efficiency, power factor, starting torque multiple, starting current multiple, maximum torque multiple, temperature rise, etc., and balance these performances. The wound winding 2 can also be set into three groups or multiple groups according to needs. When connecting, according to the number of phases of the motor, it is necessary to ensure that the resistance of each branch of the stator winding and the number of turns of the series-connected stator coils are equal.

[0035] Embodiment 2. Please refer to Figure 5 and Figure 7 , the difference feature between this embodiment and Embodiment 1 is that:

[0036] The wound winding 2 is a flat wire winding. A bottom ring frame 3 is arranged above the stator 1 corresponding to the position of the wire head 21 of the wound winding 2. Threading holes 31 are opened on the bottom ring frame 3 corresponding to the positions of the wire heads 21. The wire heads 21 pass through the bottom ring frame 3 at the corresponding positions, and the wound winding 2 is fixed through the bottom ring frame 3;

[0037] An inner ring frame 32 and an outer ring frame 33 are respectively fixed on the bottom ring frame 3 corresponding to the positions of the inner and outer wire heads 21. Fixing holes 36 are opened on the inner ring frame 32 and the outer ring frame 33 corresponding to the positions of the wire heads 21. The wire heads 21 are inserted into the fixing holes 36 at the corresponding positions. The length and width dimensions of the fixing holes 36 are both larger than the length and width dimensions of the wire heads 21. Copper bars 34 are fixed near the fixing holes 36 inside the inner ring frame 32 and the outer ring frame 33. The copper bars 34 are annular and have a structure with two ends. The copper bars 34 at the positions of the fixing holes 36 are exposed;

[0038] A fixing buckle 4 is installed in the fixing hole 36. The fixing buckle 4 includes a plug buckle one 41 and a plug buckle two 42. Covers 43 are fixed on the tops of the plug buckle one 41 and the plug buckle two 42. A conductive sheet 44 is fixedly installed on the side of the plug buckle one 41 facing the copper bar 34, and an insulating sheet 45 is fixedly installed on the side of the plug buckle two 42 facing the copper bar 34. The plug buckle one 41 and the plug buckle two 42 are inserted into the fixing hole 36 outside the wire head 21 to form a fixation. The wire head 21 is electrically connected to the copper bar 34 through the conductive sheet 44. Two lead wires 35 are connected to both the inner ring frame 32 and the outer ring frame 33. One end of the lead wire 35 is fixedly connected to the copper bar 34 inside the inner ring frame 32 and the outer ring frame 33 at the corresponding position.

[0039] When the wire end 21 is fixed, it is fixed by the bottom ring frame 3, while maintaining the structure of the winding path of the winding coil 2. When adjacent windings are connected, the buckle one 41 with the conductive sheet 44 is used, and the buckle one 41 is inserted into the fixing hole 36 at the corresponding position, so that the buckle one 41 cooperates with the bottom ring frame 3 to clamp the wire end 21. At the same time, both sides of the conductive sheet 44 are in contact with the wire end 21 and the copper bar 34. All the wire ends 21 of the windings to be connected are fixed to the inner ring frame 32 by the buckle one 41. Then, the connected windings can be electrically connected by relying on the conductive sheet 44 and the copper bar 34 to form a complete winding;

[0040] The wire ends 21 that do not need to be connected are still in the fixing holes 36 at this time. At this time, the buckle two 42 is used for fixing. The buckle two 42 is also inserted into the fixing hole 36 outside the wire end 21 to clamp and fix the wire end 21. Since the insulating sheet 45 is used on the buckle two 42, the insulating sheet 45 separates the wire end 21 from the copper bar 34, blocking the current from passing through and forming a non-wire connection. Whether the wire end 21 is electrically connected or not, it is clamped and fixed by the buckle one 41 or the buckle two 42. At the same time, it is protected by the cover plate 43, which can provide a convenient fixing method and insulation effect. To ensure the insulation effect, the buckle one 41, the buckle two 42, the cover plate 43, the inner ring frame 32, the outer ring frame 33, and the bottom ring frame 3 are all made of non-conductive materials.

[0041] Example three, please refer to Figure 8 and Figure 11 , on the basis of Example two, the following technical features are added in this example:

[0042] At the other end of the winding coil 2 away from the wire end 21 below the stator 1, a winding fixing frame 5 is installed. The winding fixing frame 5 includes an inner ring sleeve 51 and an outer ring sleeve 53. The outer side of the inner ring sleeve 51 is close to the inner side of the corresponding winding coil 2, and the inner side of the outer ring sleeve 53 is close to the outer side of the corresponding winding coil 2. A partition block one 52 is fixed at the corresponding position of the outer side of the inner ring sleeve 51 adjacent to the winding coil 2, and a partition block two 54 is fixed at the corresponding position of the inner side of the outer ring sleeve 53 adjacent to the winding coil 2. The bottom between the inner ring sleeve 51 and the outer ring sleeve 53 is fixed by a fixing bar 58. The partition block one 52 and the partition block two 54 are silicone rubber blocks. The inner ring sleeve 51, the outer ring sleeve 53, and the fixing bar 58 are all made of non-metallic materials.

[0043] When the winding 2 has a large span in the winding slot 11 of the stator 1, in order to ensure the integrity of the internal crystals of the flat wire, the bending arc of the winding 2 will be relatively large. At this time, the extension length is relatively long with respect to the stator 1, so it needs to be fixed. The existing fixing methods include fixing with insulating ropes. Generally, there are multiple poles on the stator 1 at this position. The insulating rope is wound around the winding 2 outside the stator 1 to fix the entire winding 2 through the insulating rope, and then the insulating rope is used to fix the winding 2 to the poles to obtain sufficient fixing stability. This fixing method is cumbersome and requires the insulating rope to be continuously wound around the winding 2;

[0044] In this embodiment, the winding 2 can be directly fixed by the inner ring sleeve 51 and the outer ring sleeve 53. The first partition block 52 and the second partition block 54 are located between adjacent windings 2 to prevent surface insulating paint from being worn due to mutual friction, which affects the insulation performance. At the same time, the inner ring sleeve 51 and the outer ring sleeve 53 are fixed, and the entire winding 2 extending out of the stator 1 is fixed in an inner and outer surrounding manner, which not only provides a fixing effect but also has insulation performance.

[0045] At the same time, a first ventilation hole 56 is provided at the position between adjacent first partition blocks 52 on the inner ring sleeve 51, and a second ventilation hole 57 is provided at the position between adjacent second partition blocks 54 on the outer ring sleeve 53. An insulating paper 55 is arranged in the winding 2 between the inner ring sleeve 51 and the outer ring sleeve 53.

[0046] The provision of the first ventilation hole 56 and the second ventilation hole 57 enables the internal winding 2 to have a better air circulation effect with the external environment. When the motor fan rotates to dissipate heat from the motor, sufficient heat dissipation effect for the winding 2 can be obtained. The insulating paper 55 prevents the inner and outer windings 2 from rubbing against each other, resulting in wear of the surface insulating paint.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An AC motor stator winding, comprising a stator (1), and a plurality of equally spaced slot ducts (11) are provided on the inner side of the stator (1), characterized in that, Each of the winding grooves (11) is provided with a winding coil (2). Two wire heads (21) are reserved on the winding coil (2). The two wire heads (21) extend out of the winding grooves (11) of the stator (1). The two wire heads (21) of the winding coil (2) are arranged offset inside and outside. An inner ring frame (32) and an outer ring frame (33) are arranged above the stator (1) corresponding to the positions of the inner and outer wire heads (21) of the winding coil (2). Fixing holes (36) are formed in the inner ring frame (32) and the outer ring frame (33) corresponding to the positions of the respective wire heads (21). The wire heads (21) penetrate into the fixing holes (36) at the corresponding positions. Copper bars (34) are fixed near the fixing holes (36) inside the inner ring frame (32) and the outer ring frame (33). The copper bars (34) at the positions of the fixing holes (36) are exposed, and the wire heads (21) are fixed in contact with the copper bars (34) in the fixing holes (36) at the corresponding positions.

2. The stator winding of an AC motor according to claim 1, wherein, The length and width dimensions of the fixing holes (36) are both larger than the length and width dimensions of the wire heads (21). A fixing buckle (4) is installed in the fixing holes (36). The fixing buckle (4) includes a plug buckle one (41) and a plug buckle two (42). A conductive sheet (44) is fixedly installed on the side of the plug buckle one (41) facing the copper bar (34). An insulating sheet (45) is fixedly installed on the side of the plug buckle two (42) facing the copper bar (34). The plug buckle one (41) and the plug buckle two (42) are inserted into the fixing holes (36) outside the wire heads (21) to form a fixation. The wire heads (21) are electrically connected to the copper bars (34) through the conductive sheets (44).

3. An AC motor stator winding according to claim 2, wherein Cover plates (43) are fixed at the tops of the plug buckle one (41) and the plug buckle two (42). Two lead wires (35) are connected to both the inner ring frame (32) and the outer ring frame (33). One end of each lead wire (35) is fixedly connected to the copper bar (34) inside the inner ring frame (32) and the outer ring frame (33) at the corresponding position.

4. A stator winding of an AC motor according to claim 1, characterized in that, A bottom ring frame (3) is arranged above the stator (1) corresponding to the positions of the wire heads (21) of the winding coil (2). Threading holes (31) are formed in the bottom ring frame (3) corresponding to the positions of the respective wire heads (21). The wire heads (21) pass through the bottom ring frame (3) at the corresponding positions. The winding coil (2) is fixed through the bottom ring frame (3). The inner ring frame (32) and the outer ring frame (33) are installed at the positions on the bottom ring frame (3) corresponding to the inner and outer wire heads (21).

5. An AC motor stator winding according to claim 1, characterized in that, An inner ring sleeve (51) and an outer ring sleeve (53) are arranged at the other end of the winding coil (2) below the stator (1) away from the wire heads (21). The outer side of the inner ring sleeve (51) is closely adjacent to the inner side of the winding coil (2) at the corresponding position. The inner side of the outer ring sleeve (53) is closely adjacent to the outer side of the winding coil (2) at the corresponding position. A partition block one (52) is fixed on the outer side of the inner ring sleeve (51) corresponding to the position of the adjacent winding coil (2). A partition block two (54) is fixed on the inner side of the outer ring sleeve (53) corresponding to the position of the adjacent winding coil (2). The bottom parts of the inner ring sleeve (51) and the outer ring sleeve (53) are fixed through a fixing bar (58).

6. The stator winding of an AC motor according to claim 5, characterized in that A ventilation hole one (56) is formed at a position between adjacent partition blocks one (52) on the inner ring sleeve (51), and a ventilation hole two (57) is formed at a position between adjacent partition blocks two (54) on the outer ring sleeve (53). An insulating paper (55) is arranged in the winding (2) between the inner ring sleeve (51) and the outer ring sleeve (53).

7. The stator winding of an AC motor according to claim 6, characterized in that, The partition block one (52) and the partition block two (54) are silicone rubber blocks, and the inner ring sleeve (51), the outer ring sleeve (53) and the fixing strip (58) are all made of non-metallic materials.

8. A stator winding of an AC motor according to claim 1, characterized in that, The winding (2) includes a winding one (210) and a winding two (220), the winding one (210) and the winding two (220) are arranged alternately, and the difference in the number of turns between the winding one (210) and the winding two (220) is one.

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