Processing and forming method of high-voltage motor stator, high-voltage motor stator and high-voltage motor with stator

Abstract

The invention discloses a high-voltage motor stator processing and forming method, a high-voltage motor stator and a high-voltage motor with the high-voltage motor stator. During stator processing, a ring type stator coil and a hanging handle ring type stator coil are processed and formed firstly, and then a whole-circle non-sectioning or sectioning embedding mode is adopted to form a ring type stator coil and a hanging handle ring type stator coil; respectively embedding the formed ring-type stator coil and the hanging handle ring-type stator coil into the stator iron core; the whole circle non-sectioning embedding is that the initial slot of the appointed sub-iron core pitch coil wire embedding uses the hanging handle ring type stator coil, and the residual slots are embedded with the forming ring type stator coil; according to split coil embedding, a hanging handle ring type stator coil is used in an initial slot of coil embedding of each stator core pitch coil, forming ring type stator coils are embedded in other slots, then a forming ring type stator coil of one pitch is reserved for each stator core, and the forming ring type stator coil is embedded after the stator core is assembled into a circle. The method is suitable for a whole machine non-split stator and also suitable for a split stator, the coil inserting and embedding efficiency can be effectively improved, the manufacturing cost is reduced, and the installation period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of generator stator forming, and more particularly to a high-voltage motor stator processing and forming method, a high-voltage motor stator and a high-voltage motor having the stator. Background Art

[0002] The stator of the motor consists of three parts: the stator core, the stator winding and the frame. The stator coil insulation structure in the stator winding is the key core of the high-voltage motor. The stator coil insulation will be subjected to electrical, thermal, mechanical and environmental stresses during manufacturing and operation. The operating life of the motor mainly depends on the insulation life of the stator coil. The insulation performance and embedding method of the stator coil play a vital role in the safe and reliable operation of the motor.

[0003] At present, there are two main ways to form the stator coil of a high-voltage motor. One is the bar coil form. The bar coil only has one side, and it is easy to embed the lower wire into the stator core slot. The other is the ring coil form. The ring coil has two sides, one for the upper layer and the other for the lower layer, and it is relatively complicated to embed the lower wire into the stator core slot. The ring coil insulation curing forming method is divided into a multi-glue molding curing method and a vacuum pressure impregnation (GVPI) baking curing method after the blank coil is offline. The multi-glue molding curing ring coil is suitable for large-sized motors, and the GVPI ring coil is suitable for motors with low rated voltage or small size. The ring coil embedding process mainly includes the "hanging handle" type and the step-by-step progressive offline method. The "hanging handle" type offline is suitable for blank ring coils. After the coil is embedded, it is subjected to overall impregnation (GVPI) baking curing. The step-by-step offline is suitable for the embedding of ring coils after molding curing.

[0004] The invention patent with publication number CN108667179A discloses a double-layer winding structure of a split core stator and its installation method. The patent is for split stators. The split stator coils are impregnated with GVPI as a whole. A double lower side coil with a pitch is embedded in the lower half of the slot at the joint of each core. After the split stator is spliced, the upper coil is embedded and connected with the lower coil. The patent is applicable to low voltage with a rated voltage lower than 3kV. The upper and lower coil strands at the splicing of the split stator need to be welded, which requires a large workload and complicated wiring. The upper and lower coil jumper wires are easy to interfere with each other, which is inconvenient to fix and occupies the space at the end of the stator winding. The GVPI baking curing temperature of the large-sized split stator is high. There is a risk of deformation of the split stator frame and the core during the heating process, which brings a greater risk to the later splicing and assembly of the split stator. The deformation of the core may also cause the hidden danger of damage to the coil insulation due to extrusion. Later maintenance is difficult and the cost is extremely high. Summary of the invention

[0005] The present invention aims at the problems that the traditional ring-type coil is inconvenient to install offline, easily damages the insulation of the coil nose end, and is cumbersome to disassemble for later maintenance during the processing and forming of the high-voltage motor stator. The present invention innovatively proposes a high-voltage motor stator processing and forming method, a high-voltage motor stator, and a high-voltage motor with the stator. Under the premise of ensuring the electrical performance of the coil insulation, the processing method is applicable to both the stator of the whole machine without petals and the stator of petals. It can effectively improve the efficiency of the offline installation of the coil, shorten the installation period, and facilitate the later disassembly and maintenance, thereby reducing the quality loss and safety risks caused by the operation of the coil.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows:

[0007] The invention discloses a high-voltage motor stator processing and forming method.

[0008] Step S1. Processing the forming ring type stator coil and the hanging ring type stator coil respectively;

[0009] Step S2. The processed formed ring type stator coil and the hanging handle type stator coil are installed on the stator core by using the whole circle non-petal or petal embedding method, and the coil is embedded by the hanging handle process method; wherein,

[0010] The whole circle non-petal embedding means that the starting slot of the first pitch coil embedding of the stator core uses the hanger coil type stator coil, and then the remaining slots are embedded with the molded coil type stator coil;

[0011] The split-lobe embedded coil means that the starting slot for the first pitch coil embedding of each lobe of the stator core uses a handle-ring type stator coil, and the remaining slots are embedded with formed-ring type stator coils. Then, a pitch of formed-ring type stator coil is reserved for each lobe of the stator and embedded after the stator core is assembled into a round shape.

[0012] As a preferred solution of the present invention, the specific process of embedding the coil in a whole circle without petals is as follows:

[0013] 1) The first pitch coil embedding starting slot to the bottom of the (Y-1)# slot of the stator core are sequentially embedded in the support plate, and then the lower edge of the first pitch hanger coil stator coil is sequentially embedded from the Y# slot into the slot one by one, and the corresponding upper edge is sequentially embedded from the starting slot one by one;

[0014] 2) Install the formed ring type stator coil slot by slot from the Y# slot. When the stator core is installed to the last pitch slot, lift the upper edge of the hanging ring type stator coil from the starting slot to the (Y-1)# slot out of the slot, take out the support plate at the bottom of the slot, and temporarily fix the upper edge of the hanging ring type stator coil with a support tool. Install the lower edge of the formed ring type stator coil of the last pitch slot by slot from the starting slot to the (Y-1)# slot. Finally, embed the upper edge of the hanging ring type stator coil into the slot to complete the installation of all coils.

[0015] 3) The nose end of the handlebar stator coil is wrapped with epoxy glass polyimide film three-in-one medium-glue mica tape for insulation. The newly wrapped nose end insulation and the original end insulation of the handlebar stator coil are overlapped at an angle, and the overlap length is 60mm to 100mm. The mica tape wrapped in the overlap area is coated with room temperature curing epoxy glue while wrapping.

[0016] As a preferred solution of the present invention, the specific process of the split-petal embedded coil is as follows:

[0017] a) The starting slot of the coil embedding of the first pitch of each stator core is embedded in the support plate to the bottom of the (Y-1)# slot, and then the lower edge of the first pitch of the handlebar stator coil is embedded in the slot from the Y# slot one by one, and the corresponding upper edge is embedded in the slot from the 1# slot one by one;

[0018] b) Each stator core is embedded with a molded ring stator coil slot by slot from the Y# slot. When the stator core is embedded in the last pitch slot of each stator core, the upper edge of the (Y-1)# slot and the lower edge of the (Y-1)# slot are reserved for each stator core;

[0019] c) Lift the upper edge of the handle coil stator coil from slot 1# to slot (Y-1)# of each stator core out of the slot, take out the support plate, and temporarily fix the upper edge of the handle coil with a support tool, and install the lower edge of the formed coil stator coil of the last pitch of each stator core slot by slot from slot 1# to slot (Y-1)#, and finally embed the upper edge of the handle coil stator coil into the slot to complete the installation of all coils;

[0020] d) The nose end insulation of the handlebar type stator coil is wrapped with epoxy glass polyimide film three-in-one medium glue mica tape. The newly wrapped nose end insulation and the original end insulation of the handlebar type stator coil are overlapped at an angle, and the overlap length is 60mm to 100mm. The mica tape wrapped in the overlap area is coated with room temperature curing epoxy glue while wrapping.

[0021] Another aspect of the present invention discloses a formed-ring stator coil, the coil comprising a copper flat wire and a stator coil insulation structure wrapped around the copper flat wire, wherein the stator coil insulation structure comprises electromagnetic wire insulation, turn-to-turn insulation, straight portion insulation, end insulation and nose end insulation;

[0022] The electromagnetic wire insulation is formed by a polyimide-fluorine 46 composite film sintered polyester film mica tape with excellent electrical and mechanical properties wrapped around a copper flat wire, and the thickness of the electromagnetic wire insulation is 0.40 mm to 0.60 mm;

[0023] The inter-turn insulation is formed by half-wrapping the glass cloth reinforced polyimide film, the rubber powder mica tape and the polytetrafluoroethylene film on the outside of each turn of the electromagnetic coil. According to the voltage level and the number of turns between turns, the number of half-wrapped layers of the rubber powder mica tape in the glass cloth reinforced polyimide film is generally 1-2 layers, and the polytetrafluoroethylene film is usually half-wrapped in one layer. The thickness of the polytetrafluoroethylene film is 0.03mm;

[0024] The straight part insulation and the end insulation are composed of epoxy glass multi-resin mica tape half-wrapped on the straight part of the stator coil electromagnetic wire and epoxy glass multi-resin mica tape half-wrapped on the end of the stator coil electromagnetic wire, wherein each layer of mica tape wrapped at the end of the end is staggered by 5mm to 10mm; the number of half-wrapped layers of the straight part insulation and the end insulation and the thickness of the finally formed insulation layer are designed and selected according to the voltage level of the motor;

[0025] The nose end insulation is composed of a mica tape with epoxy glass polyimide film half-wrapped on the nose end of the stator coil electromagnetic wire. The number of half-wrapped layers of the nose end insulation and the thickness of the insulation layer are designed and selected according to the voltage level of the motor. The mica tape glue content used is 26% to 30%, and the film content is 17% to 20%.

[0026] In the present invention, the end bevel length of the molded ring stator coil is defined as L 1 , the wrapping length of the end insulation is L 2 , L 2 With L 1 The relationship is shown in formula (1):

[0027]

[0028] In the present invention, the two mica tape insulations at the end insulation and the nose end insulation of the molded ring stator coil are overlapped by an inclined surface, and the overlapping area of ​​the two inclined surfaces is defined as a transition zone. Figure 1 The 2 / 3 end bevel length is overlapped, and the overlap length of the transition zone is 60mm to 100mm.

[0029] In another aspect, the present invention discloses a stator coil of a hanging ring type, wherein the coil is composed of a copper flat wire and a stator coil insulation structure wrapped around the copper flat wire, wherein the stator coil insulation structure includes electromagnetic wire insulation, turn-to-turn insulation, straight portion insulation and end insulation; wherein:

[0030] The electromagnetic wire insulation is formed by a polyimide-fluorine 46 composite film sintered polyester film mica tape with excellent electrical and mechanical properties wrapped around a copper flat wire, and the thickness of the electromagnetic wire insulation is 0.40 mm to 0.60 mm;

[0031] The inter-turn insulation is formed by half-wrapping the glass cloth reinforced polyimide film, the rubber powder mica tape and the polytetrafluoroethylene film on the outside of each turn of the electromagnetic coil. According to the voltage level and the number of turns between turns, the number of half-wrapped layers of the rubber powder mica tape in the glass cloth reinforced polyimide film is generally 1-2 layers, and the polytetrafluoroethylene film is usually half-wrapped in one layer. The thickness of the polytetrafluoroethylene film is 0.03mm;

[0032] The straight portion insulation and the end insulation are composed of epoxy glass multi-resin mica tape half-wrapped on the straight portion of the stator coil electromagnetic wire and epoxy glass multi-resin mica tape half-wrapped on the end of the stator coil electromagnetic wire, and each layer of mica tape wrapped at the end of the end is staggered by 5mm to 10mm; the number of half-wrapped layers of the straight portion insulation and the end insulation and the thickness of the finally formed insulation layer are designed and selected according to the voltage level of the motor.

[0033] In the present invention, the main difference between the hanger coil type stator coil and the formed coil type stator coil is that, firstly, the nose end insulation of the hanger coil is processed and formed after all coils are embedded in the stator core, and is not formed when the main insulation of the coil is processed; secondly, the shape design (size, radius, etc.) of the nose end of the hanger coil is also different from that of the conventional formed coil type coil. In order to avoid damaging the coil insulation during the process of hanging the hanger coil off the line, the present invention increases the radius of the nose end of the hanger coil. The calculation expression of the radius of the nose end of the hanger coil is as follows:

[0034]

[0035] Among them, C 1 The value of C is 1.06~1.12, 2 The value of R is 55~70; 1 is the nose radius of a conventional coil, such as a formed-loop coil; R 2 is the radius of the nose end of the handle coil.

[0036] In the present invention, the length of the bevel side of the coil end of the hanger coil stator coil is defined as L 4 , the end insulation wrapping length is L 3 , L 3 With L 4The relationship is as follows:

[0037]

[0038] The present invention also discloses a high-voltage motor stator, which includes an annular stator core having slots arranged in a circular shape, and a stator prepared by the above-mentioned stator processing and forming method and inserted into the slots.

[0039] The present invention further discloses a high-voltage motor, which includes the stator described above, and a rotor disposed on the inner circumference of the stator in a manner that the rotor can rotate freely relative to the stator.

[0040] Beneficial effects of the present invention:

[0041] 1. Compared with the conventional whole machine non-divided stator step-type offline process method and the divided stator GVPI process method, the processing method proposed by the present invention is applicable to both the whole machine non-divided stator and the divided stator, effectively reducing the quality loss and safety risks caused during the operation of the coil, effectively improving the offline installation efficiency of the coil, reducing manufacturing costs, and shortening the installation cycle.

[0042] 2. The present invention innovatively develops a hanger coil structure with a larger nose end radius. By increasing the radius of the nose end of the hanger coil, the expandable size of the nose end of the hanger coil is increased, which effectively avoids damage to the coil insulation during the process of the hanger coil being unloaded and hoisted.

[0043] 3. Compared with the conventional whole machine non-petal stator step-type offline process method and petal GVPI process method, the present invention is simple to maintain and disassemble in the later stage, and the maintenance cost is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The foregoing and following detailed description of the present invention will become more apparent when read in conjunction with the following drawings, in which:

[0045] Figure 1 This is a schematic diagram of the insulation structure of the stator coil end of the present invention;

[0046] Figure 2 It is a schematic diagram of the radius of the nose end of the stator coil of the present invention. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions for achieving the purpose of the present invention will be further described below through several specific embodiments. It should be noted that the technical solutions claimed for protection in the present invention include but are not limited to the following embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0048] Example 1

[0049] This embodiment discloses a method for processing and forming a high-voltage motor stator. The method for processing and forming a stator mainly involves two steps, one of which is the processing of the stator coil, and the other is the embedding of the stator coil. The specific processing and forming method is as follows:

[0050] Step S1. Processing the forming ring type stator coil and the hanging ring type stator coil respectively;

[0051] Step S2. Install the processed formed ring type stator coil and the hanging ring type stator coil on the stator core by adopting the whole circle non-petal or petal embedding method.

[0052] In the embodiment described in the present invention, the coil embedding method of the full-circle non-petal stator core adopts the "hanger" process method for embedding the stator coil, and the 1# slot marked on the stator core is used as the starting slot for embedding the first pitch coil. The first pitch slot is embedded with the hanger ring stator coil, and the remaining slots are embedded with the forming ring stator coil; the specific embedding process is as follows:

[0053] 1) From slot 1# to slot (Y-1)# of the stator core, use a wooden support plate to embed the slot bottom, and embed the lower edge of the first pitch of the handlebar stator coil into the slot one by one from slot Y#, and the corresponding upper edge is embedded into the slot one by one from slot 1#;

[0054] 2) The remaining slots use formed ring type stator coils, which are embedded slot by slot from Y# slot. When embedded to the last pitch slot of the stator core, the upper edge of the handle ring type stator coil from slot 1# to (Y-1)# slot is lifted out of the slot, the wooden support plate is taken out, and the upper edge of the handle coil is temporarily fixed with a support tool. The lower edge of the formed ring type stator coil of the last pitch is embedded slot by slot from slot 1# to (Y-1)# slot, and finally the upper edge of the handle ring type stator coil is embedded in the slot, and finally all coils are embedded;

[0055] 3) After the coil is embedded, the nose end of the handle-type stator coil is wrapped with epoxy glass polyimide film three-in-one medium-glue mica tape to form nose end insulation; the newly wrapped nose end insulation of the coil and the original end insulation of the coil are overlapped at an angle, and the mica tape wrapped in the overlapping area is coated with room temperature curing epoxy glue while wrapping to improve the insulation electrical strength of the overlapping area. The overlapping length of the last two insulating parts is 60mm~100mm.

[0056] In the embodiment described in the present invention, the coil embedding method of the split stator core adopts the "hanging handle" process method, the first pitch slot of each stator core uses a hanging handle coil stator coil, and the remaining slots of each stator core use a formed coil stator coil; each stator core reserves a pitch formed coil coil and then embeds it after the stator is assembled into a circle; the specific coil embedding process is as follows:

[0057] a) The 1# slot marked on each stator core is used as the starting slot for the first pitch coil embedding; from the 1# slot to the (Y-1)# slot on each stator core, a wooden support plate is embedded into the slot bottom, and then the lower edge of the first pitch hanger coil stator coil is embedded into the slot one by one from the Y# slot, and the corresponding upper edge is embedded into the slot one by one from the 1# slot;

[0058] b) The remaining slots of each stator core use formed ring stator coils, and the coils are embedded in slots one by one from Y# slots. When the coils are embedded in the last pitch slot of each stator core, the upper edge of (Y-1)# slots and the lower edge of (Y-1)# slots are reserved for each stator core;

[0059] c) Assemble the stator core into a circle, lift the upper edge of the handle ring type stator coil from the 1# slot to the (Y-1)# slot of each stator core out of the slot, remove the wooden support plate at the bottom of the slot, and temporarily fix the upper edge of the handle ring coil with a support tool, and install the lower edge of the forming ring type stator coil of the last pitch of each stator core into the 1# slot to the (Y-1)# slot of the adjacent stator core slot one by one, and finally embed the upper edge of the handle ring type stator coil into the slot, and finally complete the installation of all coils;

[0060] d) After the coil is embedded, the nose end of the handlebar stator coil is wrapped with epoxy glass polyimide film three-in-one medium glue mica tape to form nose end insulation; the newly wrapped nose end insulation and the original end insulation of the coil are overlapped at an angle, and the mica tape wrapped in the overlapping area is coated with room temperature curing epoxy glue while wrapping to improve the insulation electrical strength of the overlapping area. The last overlap length of the two insulating parts is 60mm~100mm.

[0061] In the embodiment described in the present invention, either of the two wire embedding methods mentioned above can be selected during processing.

[0062] Example 2

[0063] On the basis of Example 1, this embodiment discloses a molded ring type stator coil and a processing method for manufacturing the above molded ring type stator coil. First, the molded ring type stator coil includes a copper flat wire and an insulation structure wrapped around the copper flat wire, and the insulation structure includes electromagnetic wire insulation, turn-to-turn insulation, straight portion insulation, end insulation and nose end insulation; the straight portion insulation and end insulation of the coil are hot-pressed and cured, and the nose end insulation is semi-cured; the electric field strength borne by the straight portion and the end of the coil is high, and the hot-pressing curing method is used to improve the insulation performance, and the electric field strength borne by the nose end is low. The insulation of the nose end uses epoxy glass polyimide film three-in-one medium-glue mica tape with better electrical strength, which has electrical properties equivalent to hot-pressing cured insulation in an incompletely cured state, while increasing the softness of the coil nose end to avoid damage to the nose end insulation during the wire embedding process.

[0064] Furthermore, the processing method for manufacturing the formed ring type stator coil specifically comprises the following steps:

[0065] (1) Use polyimide-fluorine 46 composite film sintered polyester film mica tape with excellent electrical and mechanical properties to wrap the copper flat wire, and form electromagnetic wire insulation on the outside of the copper flat wire. The thickness of the electromagnetic wire insulation is 0.40mm to 0.60mm;

[0066] (2) During the winding process of the stator coil electromagnetic wire, the inter-turn insulation is wrapped. The inter-turn insulation material uses glass cloth to reinforce the polyimide film with rubber powder mica tape, and then half-wraps a layer of 0.03mm polytetrafluoroethylene film. Then, the straight part of the wire is hot-molded to improve the flatness of the wire. The hot-pressing temperature is 170℃~190℃, and the heat preservation is 0.5h~1h;

[0067] (3) The straight part and the end half of the stator coil are wrapped with epoxy glass multi-glue mica tape, wherein each layer of mica tape wrapped at the end is staggered by 5mm to 10mm; the insulation half of the nose end is wrapped with epoxy glass polyimide film medium-glue mica tape with better electrical strength, the mica tape glue content is 26% to 30%, and the film content is 17% to 20%.

[0068] (4) After the coil is insulated and wrapped, a layer of polytetrafluoroethylene film is half-wrapped on the straight and end parts. The straight part of the coil is placed in a molding mold, and the main insulation of the coil is heated and molded to cure. The curing process insulation temperature is 180℃~200℃, and the insulation time is 1h~1.5h.

[0069] In the embodiment described in the present invention, after the forming ring type stator coil is processed and formed, the length of the bevel side of the coil end is defined as L 1 , the end insulation wrapping length is L 2 ,L 2 With L 1 The relationship is shown in formula (1):

[0070]

[0071] In the embodiment described in the present invention, after the coil insulation is wrapped, the inclined overlap area of ​​the end insulation and the nose end insulation is defined as a transition zone. Figure 1 The 2 / 3 end bevel length is overlapped as shown, and the two types of mica tape insulation are overlapped at an angle, and the overlap length in the transition zone is 60mm to 100mm.

[0072] Example 3

[0073] On the basis of Example 1, this embodiment discloses a stator coil with a handlebar ring and a processing method for manufacturing the stator coil with a handlebar ring. In order to facilitate the coil coil embedding and avoid damaging the insulation of the coil nose end during the embedding process, the stator coil with a handlebar ring is designed as a semi-formed coil, and the stator coil with a handlebar ring includes a copper flat wire and an insulation structure wrapped around the copper flat wire, and the insulation structure includes electromagnetic wire insulation, inter-turn insulation, straight part insulation and end insulation; the insulation of the coil straight part and the end is fully cured, and the insulation of the coil nose end is insulated after the wire is embedded.

[0074] Furthermore, the processing method for manufacturing the hanger ring type stator coil specifically comprises the following steps:

[0075] (a) Use polyimide-fluorine 46 composite film sintered polyester film mica tape with excellent electrical and mechanical properties to wrap the copper flat wire, and form electromagnetic wire insulation on the outside of the copper flat wire. The thickness of the electromagnetic wire insulation is 0.40mm to 0.60mm;

[0076] (b) During the winding process of the stator coil electromagnetic wire, the inter-turn insulation is wrapped. The inter-turn insulation material uses glass cloth to reinforce the polyimide film with rubber powder mica tape, and then half-wraps a layer of 0.03mm polytetrafluoroethylene film. Then, the straight part of the wire is hot-molded to improve the flatness of the wire. The hot-pressing temperature is 170℃~190℃, and the heat preservation is 0.5h~1h;

[0077] (c) The straight part and the end half of the stator coil are wrapped with epoxy glass multi-glue mica tape, and each layer of mica tape wrapped at the end is staggered by 5mm to 10mm; the nose end insulation half is wrapped with epoxy glass polyimide film medium-glue mica tape with better electrical strength, the mica tape glue content is 26% to 30%, and the film content is 17% to 20%.

[0078] (d) After the coil is insulated and wrapped, a layer of polytetrafluoroethylene film is half-wrapped on the straight line and end part, and the straight line part of the coil is placed in a molding mold. The main insulation of the coil is heated and molded to cure. The curing process insulation temperature is 180℃~200℃, and the insulation time is 1h~1.5h.

[0079] In the embodiment described in the present invention, in order to avoid damaging the coil insulation during the process of the hanger coil being unloaded, the radius of the nose end of the hanger coil is increased to increase the expandable size of the nose end of the hanger coil; assuming that the radius of the nose end of the hanger coil is R 2 , the pitch of the coil is defined as Y, and the radius of the nose end of the conventional coil is R 1 , then R 2 With R 1 The relationship is shown in formula (3):

[0080]

[0081] Among them, C 1 The value of C is 1.06~1.12, 2 The value ranges from 55 to 70.

[0082] In the embodiment described in the present invention, after the above-mentioned stator coil with a hanging ring is processed and formed, the length of the bevel side of the coil end is defined as L 4 , the end insulation wrapping length is L 3 , L 3 With L 4 The relationship (2) is shown as follows:

[0083]

[0084] Example 4

[0085] The present embodiment discloses a high-voltage motor stator, which includes an annular stator core having slots arranged in a circular shape, and a stator prepared by the stator processing and forming method described in any of the above embodiments and inserted into the slots.

[0086] Example 5

[0087] This embodiment discloses a high-voltage motor, which includes the stator described in Embodiment 4 and a rotor arranged on the inner circumference of the stator in a manner that is freely rotatable relative to the stator.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0089] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for processing and forming a high-voltage motor stator, characterized in that: The following steps are involved: Step S1. Processing the forming ring type stator coil and the hanging ring type stator coil respectively; Step S2. Install the processed formed ring type stator coil and the hanging handle type stator coil into the stator core by using the whole circle non-petal or petal embedding method, and the coil embedding adopts the hanging handle process method; wherein, The whole circle non-petal embedding means that the starting slot of the first pitch coil embedding of the stator core uses the hanger coil type stator coil, and then the remaining slots are embedded with the molded coil type stator coil; The split-lobe embedded coil means that the starting slot for the first pitch coil embedding of each lobe of the stator core uses a handle-ring type stator coil, and the remaining slots are embedded with formed-ring type stator coils. Then, a pitch of formed-ring type stator coil is reserved for each lobe of the stator and embedded after the stator core is assembled into a round shape.

2. The high-voltage motor stator processing and forming method according to claim 1 is characterized in that: The specific process of embedding the coil in a whole circle without petals is as follows: 1) The first pitch coil embedding starting slot to the bottom of the (Y-1)# slot of the stator core are sequentially embedded in the support plate, and then the lower edge of the first pitch hanger coil stator coil is sequentially embedded from the Y# slot into the slot one by one, and the corresponding upper edge is sequentially embedded from the starting slot one by one; 2) Install the formed ring type stator coil slot by slot from the Y# slot. When the stator core is installed to the last pitch slot, lift the upper edge of the hanging ring type stator coil from the starting slot to the (Y-1)# slot out of the slot, take out the support plate at the bottom of the slot, and temporarily fix the upper edge of the hanging ring type stator coil with a support tool. Install the lower edge of the formed ring type stator coil of the last pitch slot by slot from the starting slot to the (Y-1)# slot. Finally, embed the upper edge of the hanging ring type stator coil into the slot to complete the installation of all coils. 3) The nose end of the handlebar-type stator coil is insulated and wrapped to form nose end insulation, and the newly wrapped nose end insulation and the original end insulation of the handlebar-type stator coil are overlapped by an inclined surface.

3. The high voltage motor stator processing and forming method according to claim 1, characterized in that: In step 3), the nose end insulation is formed by a three-in-one epoxy glass polyimide film medium glue mica tape wrapped around the nose end of the coil. The overlap length between the newly wrapped nose end insulation and the original end insulation is 60mm to 100mm, and the mica tape wrapped in the overlap area is coated with room temperature curing epoxy glue while wrapping.

4. The high-voltage motor stator processing and forming method according to claim 1, characterized in that: The specific process of split-petal embedded coil is as follows: a) The starting slot of the coil embedding of the first pitch of each stator core is embedded in the support plate to the bottom of the (Y-1)# slot, and then the lower edge of the first pitch of the handlebar stator coil is embedded in the slot from the Y# slot one by one, and the corresponding upper edge is embedded in the slot from the 1# slot one by one; b) Each stator core is embedded with a molded ring stator coil slot by slot from the Y# slot. When the stator core is embedded in the last pitch slot of each stator core, the upper edge of the (Y-1)# slot and the lower edge of the (Y-1)# slot are reserved for each stator core; c) Lift the upper edge of the handle coil stator coil from slot 1# to slot (Y-1)# of each stator core out of the slot, take out the support plate, and temporarily fix the upper edge of the handle coil with a support tool, and install the lower edge of the formed coil stator coil of the last pitch of each stator core slot by slot from slot 1# to slot (Y-1)#, and finally embed the upper edge of the handle coil stator coil into the slot to complete the installation of all coils; d) The nose end of the stator coil of the hanging handle type is insulated and wrapped to form nose end insulation, and the newly wrapped nose end insulation and the original end insulation of the stator coil of the hanging handle type are overlapped by an inclined surface.

5. The high-voltage motor stator processing and forming method according to claim 1, characterized in that: In step d), the nose end insulation is formed by a three-in-one epoxy glass polyimide film medium glue mica tape wrapped around the nose end of the coil. The overlap length of the newly wrapped nose end insulation and the original end insulation is 60mm to 100mm, and the mica tape wrapped in the overlap area is coated with room temperature curing epoxy glue while wrapping.

6. The high-voltage motor stator processing and forming method according to claim 1, characterized in that: The processing of the molded ring type stator coil includes electromagnetic wire insulation processing, turn-to-turn insulation processing, straight line insulation processing, end insulation processing and nose end insulation processing; after the coil is insulated and wrapped, a layer of polytetrafluoroethylene film is half-wrapped on the straight line and end surface, the straight line part of the coil is placed in a molding mold, and the main insulation of the coil is heated, molded and cured. The curing process insulation temperature is 180°C to 200°C, and the insulation time is 1h to 1.5h, and finally a molded ring type stator coil is obtained.

7. The high voltage motor stator processing and forming method according to claim 6, characterized in that: The electromagnetic wire insulation processing refers to wrapping the copper rectangular wire with a polyimide-fluorine 46 composite film sintered polyester film mica tape, and the electromagnetic wire insulation thickness is 0.40 mm to 0.60 mm.

8. The high voltage motor stator processing and forming method according to claim 6, characterized in that: After the electromagnetic wire insulation processing is completed, during the process of winding the electromagnetic wire, the inter-turn insulation is wrapped. The inter-turn insulation material uses glass cloth reinforced polyimide film with rubber powder mica tape. The wrapping method is half-folding, and finally half-folding a layer of polytetrafluoroethylene film.

9. The high voltage motor stator processing and forming method according to claim 6, characterized in that: The straight part insulation processing refers to half-wrapping the straight part of the stator coil with epoxy glass multi-resin mica tape.

10. The high voltage motor stator processing and forming method according to claim 6, characterized in that: The end insulation processing refers to half-wrapping the end of the stator coil with epoxy glass multi-resin mica tape, and each layer of mica tape wrapped at the end of the end is staggered by 5mm to 10mm.

11. The high voltage motor stator processing and forming method according to claim 6, characterized in that: The nose end insulation processing refers to half-wrapping the nose end of the stator coil with epoxy glass polyimide film and gluing mica tape.

12. The high voltage motor stator forming method according to claim 6, characterized in that: The end bevel length of the formed-ring stator coil is defined as L1, and the wrapping length of the end insulation is L2. The relationship between L2 and L1 is shown in formula (1):

13. The high voltage motor stator processing and forming method according to claim 6, characterized in that: The bevel overlap area between the end insulation and the nose end insulation of the formed ring stator coil is defined as a transition zone. The end insulation and the nose end insulation are overlapped at 2 / 3 of the end bevel length. The insulation at the two locations is overlapped bevelly, and the transition zone overlap length is 60mm to 100mm.

14. The high voltage motor stator processing and forming method according to claim 1, characterized in that: The processing of the handlebar-type stator coil includes electromagnetic wire insulation processing, turn-to-turn insulation processing, straight-line insulation processing and end insulation processing; after the coil is insulated and wrapped, a layer of polytetrafluoroethylene film is half-lapped on the straight-line and end surfaces, and the main insulation of the straight-line part of the coil is heated, molded and cured. The curing process insulation temperature is 180° C. to 200° C., and the insulation time is 1h to 1.5h, and finally the handlebar-type stator coil is obtained.

15. The high voltage motor stator processing and forming method according to claim 14, characterized in that: The electromagnetic wire insulation processing of the hanger-type coil refers to wrapping the copper rectangular wire with a polyimide-fluorine 46 composite film sintered polyester film mica tape, and the electromagnetic wire insulation thickness is 0.40 mm to 0.60 mm.

16. The method for processing and forming a high-voltage motor stator according to claim 14, characterized in that: The inter-turn insulation processing of the hanging handle type coil refers to wrapping the inter-turn insulation during the winding process of the electromagnetic wire after the electromagnetic wire insulation processing is completed. The inter-turn insulation material uses glass cloth reinforced polyimide film with rubber powder mica tape. The wrapping method is half-overlapping, and finally half-overlapping with a layer of polytetrafluoroethylene film.

17. The high voltage motor stator forming method according to claim 14, characterized in that: The straight portion insulation processing of the hanger-type coil refers to half-wrapping the straight portion of the stator coil with epoxy glass multi-resin mica tape.

18. The high voltage motor stator forming method according to claim 14, characterized in that: The end insulation processing of the hanging handle type coil refers to half-wrapping the end of the stator coil with epoxy glass multi-resin mica tape, and each layer of mica tape wrapped at the end of the end is staggered by 5mm to 10mm.

19. The high voltage motor stator forming method according to claim 14, characterized in that: The end bevel length of the stator coil is defined as L3, and the end insulation wrapping length is defined as L4. The relationship between L4 and L3 is as follows:

20. The high voltage motor stator forming method according to claim 14, characterized in that: The nose radius of the stator coil with a hanging ring is R2, the nose radius of the conventional coil is R1, the coil pitch is Y, and the relationship between R2 and R1 is as follows: Among them, the value of C1 is 1.06~1.12, and the value of C2 is 55~70.

21. A high voltage motor stator, characterized in that: It comprises an annular stator core having slots arranged in a circumferential shape, and a stator prepared by the method according to any one of claims 1 to 20 inserted into the slots.

22. A high voltage motor, characterized in that: The invention comprises the stator according to claim 21, and a rotor provided on the inner peripheral side of the stator in a manner that is freely rotatable relative to the stator.

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