Odd-layer hairpin winding with adjustable number of turns

Abstract

The invention discloses an odd-layer hairpin winding with adjustable turns, which comprises a stator core and a plurality of odd-layer hairpin windings, and is characterized in that one end of the stator core is provided with a winding insertion side, and the other end of the stator core is provided with a winding welding side; the odd-layer hairpin windings comprise round wire windings and hairpin windings; a plurality of winding grooves are uniformly distributed along the inner wall of the stator core, and each winding groove comprises a single-layer trapezoidal groove and a plurality of layers of rectangular grooves; the round wire windings are embedded in the trapezoid grooves, and the hairpin windings are inserted into the rectangular grooves respectively. The hairpin windings are arranged in integer layers, the round wire windings are arranged in odd layers, and the number of turns can be adjusted in advance. By additionally arranging the round wire windings on the odd-number-layer hairpin windings and utilizing the characteristic that the number of turns of the round wire windings is adjustable, the phenomenon that the odd-number-layer hairpin windings generate high alternating current resistance in an ultra-high-speed environment is effectively avoided, the phenomena of efficiency reduction and serious heating of the motor are prevented, and it is ensured that the motor can stably and efficiently operate under the ultra-high-speed working condition.

Description

Technical Field

[0001] The invention belongs to the field of hairpin winding motors, in particular to a hairpin winding with an odd number of layers and adjustable turns. Background Art

[0002] Ultra-high-speed motors are currently experiencing rapid growth, driven by breakthroughs in materials, magnetic bearings, and control technologies. These motors hold significant strategic and economic value in both military and civilian sectors. Hairpin winding motors are a mature technology, boasting high efficiency and power density, and are widely used in industries such as energy storage, automotive, and drones. However, at ultra-high speeds, the hairpin winding generates AC resistance several times greater than the DC resistance, resulting in significantly lower motor efficiency and excessive heat generation, hindering their application.

[0003] Chinese patent CN214412421U discloses a stator assembly and a hairpin winding motor. The motor can effectively cool the hairpin by including a heat dissipation device to improve power and efficiency. However, in an ultra-high-speed environment, the hairpin winding will generate an AC resistance that is several times greater than the DC resistance, resulting in severely low motor efficiency and severe heat generation, which hinders its application and reduces the motor's operating stability and performance. In addition, the hairpin winding cannot be produced in series due to the limited number of turns. When the operating voltage and power change, the motor hairpin winding needs to be redesigned, which extends the motor design cycle, increases manufacturing costs, and leads to low production efficiency.

[0004] Therefore, there is an urgent need for an odd-layer hairpin winding with adjustable turns. By utilizing the adjustable turns of the round wire winding, the turns of the round wire winding can be pre-adjusted according to the power of the motor to prevent the motor from generating high AC resistance when running at ultra-high speed. Summary of the Invention

[0005] An object of the present invention is to provide a hairpin winding with an odd number of layers and adjustable turns, so as to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A hairpin winding with an odd number of layers and adjustable turns, comprising: A stator core and a plurality of odd-numbered layers of hairpin windings, wherein one end of the stator core is provided with a winding insertion side and the other end is provided with a winding welding side; The odd-numbered-layer hairpin winding includes a round wire winding and a hairpin winding; A plurality of winding slots are evenly distributed along the inner wall of the stator core, and the winding slots include a single layer of trapezoidal slots and a plurality of layers of rectangular slots; The round wire winding is embedded in the trapezoidal slot, and the hairpin windings are respectively inserted into the rectangular slots of several layers; The hairpin winding is arranged to have an integer number of layers, and the round wire winding is arranged to have an odd number of layers, and the number of turns can be pre-adjusted.

[0007] The odd-layer hairpin winding with adjustable turns according to the solution of the present invention has at least the following technical effects: The turns-adjustable odd-layer hairpin winding is achieved by adding a round wire winding to the odd-layer hairpin winding to replace a portion of the hairpin winding. By utilizing the characteristic of the round wire winding having an adjustable number of turns, the number of turns of the round wire winding is pre-adjusted according to the motor power before the winding is installed, and the round wire winding is always kept at an odd number of turns. This can effectively avoid the odd-layer hairpin winding from generating a high AC resistance in an ultra-high-speed environment, keep the overall AC resistance of the winding within a reasonable range, prevent the motor from experiencing a decrease in efficiency and severe heat generation, and ensure that the motor can operate stably and efficiently under ultra-high-speed conditions.

[0008] The existing odd-layer hairpin winding cannot be mass-produced due to the limited number of turns. When the operating voltage and power change, it needs to be redesigned, which extends the motor design cycle and increases the manufacturing cost. However, when the round wire winding with adjustable turns is adopted in the present application, when the operating voltage and power change, the number of turns of the round wire winding can be adjusted to adapt to different working conditions without redesigning the entire winding, which effectively improves the versatility and applicability of the motor, greatly shortens the motor design cycle, reduces design and manufacturing costs, and improves production efficiency.

[0009] As a further solution of the present invention: the odd-layer hairpin winding includes three phases: U, V and W, the U phase includes a U-phase input terminal and a U-phase output terminal, the V phase includes a V-phase input terminal and a V-phase output terminal, and the W phase includes a W-phase input terminal and a W-phase output terminal, and is respectively composed of three-phase hairpin windings and three-phase round wire windings.

[0010] Since the odd-layer hairpin winding includes three phases: U, V, and W, the U phase includes a U-phase input terminal and a U-phase output terminal, the V phase includes a V-phase input terminal and a V-phase output terminal, and the W phase includes a W-phase input terminal and a W-phase output terminal, and is respectively composed of three-phase hairpin windings and three-phase round wire windings; the hairpin winding has the advantages of high slot fill rate, good heat dissipation performance, and high power density, while the round wire winding has the flexibility of adjustable number of turns; combining the three-phase hairpin winding and the three-phase round wire winding can give full play to the advantages of both; and by adjusting the number of turns of the round wire winding, the performance of the motor can be optimized according to different application requirements and working conditions, such as adjusting the motor's voltage, current, torque and other parameters, so that the motor can better adapt to various complex working conditions and meet the motor's performance and usage requirements under ultra-high-speed conditions.

[0011] As a further solution of the present invention: the three-phase hairpin winding includes a U1 phase winding, a V1 phase winding and a W1 phase winding, and the three-phase round wire winding includes a U2 phase winding, a V2 phase winding and a W2 phase winding.

[0012] As a further solution of the present invention: the U1 phase winding includes a U1 phase input terminal and a U1 phase output terminal, the V1 phase winding includes a V1 phase input terminal and a V1 phase output terminal, the W1 phase winding includes a W1 phase input terminal and a W1 phase output terminal, and the U1 phase input terminal, U1 phase output terminal, V1 phase input terminal, V1 phase output terminal, W1 phase input terminal and W1 phase output terminal are all arranged on the welding side of the winding.

[0013] Since the three-phase hairpin winding includes U1-phase winding, V1-phase winding and W1-phase winding, the three-phase round wire winding includes U2-phase winding, V2-phase winding and W2-phase winding; the U1-phase winding includes U1-phase input terminal and U1-phase output terminal, the V1-phase winding includes V1-phase input terminal and V1-phase output terminal, and the W1-phase winding includes W1-phase input terminal and W1-phase output terminal. The U1-phase input terminal, U1-phase output terminal, V1-phase input terminal, V1-phase output terminal, W1-phase input terminal and W1-phase output terminal are all set It is located on the winding welding side; the independent terminals can avoid the mutual influence of currents between different phases, ensuring that each phase winding can work independently and stably; and the independent input and output terminals make the control of the motor more flexible and precise, and can adjust the current and voltage of each phase winding according to different working conditions and needs, thereby optimizing the performance of the motor and achieving smooth operation and efficient operation of the motor; in addition, the terminals of the three phases of the hairpin winding are concentrated on the winding welding side, which is convenient for troubleshooting and maintenance, effectively reducing maintenance time and workload.

[0014] As a further solution of the present invention: the U2 phase winding includes a U2 phase input terminal and a U2 phase output terminal, the V2 phase winding includes a V2 phase input terminal and a V2 phase output terminal, and the W2 phase winding includes a W2 phase input terminal and a W2 phase output terminal.

[0015] As a further solution of the present invention: the round wire winding also includes a neutral point, and the U2 phase output terminal, the V2 phase output terminal and the W2 phase output terminal are short-circuited with the neutral point respectively.

[0016] Since the U2 phase winding includes the U2 phase input terminal and the U2 phase output terminal, the V2 phase winding includes the V2 phase input terminal and the V2 phase output terminal, and the W2 phase winding includes the W2 phase input terminal and the W2 phase output terminal; the round wire winding also includes a neutral point, and the U2 phase output terminal, the V2 phase output terminal, and the W2 phase output terminal are short-circuited with the neutral point respectively; by short-circuiting the U2 phase output terminal, the V2 phase output terminal, and the W2 phase output terminal with the neutral point respectively, a common reference point can be provided for the three-phase current, which helps to balance the three-phase voltage; when the three-phase load is unbalanced, The neutral point can play a regulating role, keeping the voltage of each phase relatively stable, reducing the damage to the motor caused by voltage imbalance, and preventing local overheating and efficiency reduction of the motor, thereby ensuring the operating stability and reliability of the motor; and the existence of the neutral point provides a path for harmonic currents, and some harmonic currents can flow back to the power supply through the neutral point, thereby reducing the accumulation of harmonics in the motor windings, suppressing the damage of harmonics to the motor, and improving the power quality and operating efficiency of the motor; at the same time, using the neutral point to communicate and exchange data with the power grid can realize remote monitoring and control of the motor.

[0017] As a further solution of the present invention, the hairpin windings share the neutral point of the round wire windings.

[0018] Since the hairpin winding shares the neutral point of the round wire winding, the three-phase currents of the round wire winding and the hairpin winding can influence and adjust each other, thereby better achieving the balance of the three-phase currents, enabling both to operate under appropriate working conditions, giving full play to their respective advantages, and improving the overall power output capacity of the motor. At the same time, it reduces the number of circuit connection points and lines, thereby reducing the probability of electrical failures.

[0019] As a further solution of the present invention: the stator core includes stator teeth, a limit plate is provided on the stator teeth, the round wire winding is provided on one side of the limit plate, and the hairpin winding is provided on the other side of the limit plate.

[0020] Since the stator core includes stator teeth, a limit plate is provided on the stator teeth, the round wire winding is arranged on one side of the limit plate, and the hairpin winding is arranged on the other side of the limit plate; the limit plate provides a clear installation position and boundary for the round wire winding and the hairpin winding, and can clearly distinguish the installation areas of the two windings during the assembly process to avoid installation confusion; and can effectively limit the position of the round wire winding and the hairpin winding to prevent them from being displaced or shaking due to vibration, electromagnetic force and other factors during the operation of the motor, thereby ensuring the stability of the winding and improving the overall reliability of the motor; at the same time, the round wire winding and the hairpin winding will generate electromagnetic fields when working. Arranging them on both sides of the limit plate respectively can increase the physical distance between the two, thereby reducing electromagnetic interference between them and ensuring the stability of the electrical performance of the motor.

[0021] As a further solution of the present invention: the stator teeth include a plurality of groups of stator core teeth, and a plurality of the odd-numbered layers of hairpin windings are correspondingly arranged in the plurality of the stator core teeth.

[0022] Since the stator teeth include several groups of stator core teeth, by arranging several odd-numbered layers of hairpin windings in corresponding groups of stator core teeth, the odd-numbered layers of hairpin windings are reasonably distributed within the stator core teeth, which can make the magnetic field generated by the windings more concentrated and uniform. When current passes through the windings, the magnetic fields generated by each layer of windings are superimposed on each other, thereby enhancing the magnetic field strength inside the motor, which can improve the torque output capacity of the motor, enabling the motor to output greater power under the same current and voltage conditions, meeting the needs of more high-load application scenarios.

[0023] As a further solution of the present invention: the surface of each conductor of the round wire winding is coated with an insulating coating.

[0024] By applying an insulating coating on the surface of each conductor of the round wire winding, effective electrical isolation is formed between the conductors, preventing current from flowing in unintended paths, greatly reducing the probability of faults such as short circuits and leakage, enhancing the insulation performance of the round wire winding, and further improving the performance and reliability of the motor.

[0025] As a further solution of the present invention: temperature sensors are respectively provided in a plurality of the winding grooves.

[0026] Since temperature sensors are installed in several winding slots, the temperature changes in the winding slots can be monitored in real time. Once the temperature exceeds the safety threshold, an alarm will be issued immediately, allowing staff to take appropriate measures in time to avoid damage to the motor due to overheating, prevent serious accidents such as aging of insulation materials, short circuits and even fires, and effectively protect the overall structure and performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0028] Figure 1 The figure is a schematic diagram of a stator structure with an odd-number of layers of hairpin winding with adjustable turns; Figure 2 This is a schematic diagram of a winding slot structure of an odd-numbered hairpin winding with adjustable turns; Figure 3 This is a three-phase wiring schematic diagram of an odd-number-layer hairpin winding with adjustable turns; Figure 4 This is a three-phase wiring schematic diagram of a round wire winding with an odd-number-layer hairpin winding with adjustable turns; Figure 5 This is a three-phase wiring schematic diagram of a hairpin winding with an odd number of layers and adjustable turns; Figure 6 The figure is a schematic diagram of the wiring structure of an odd-layer hairpin winding with adjustable turns.

[0029] Reference numerals: 1. Stator core; 11. Winding insertion side; 12. Winding welding side; 13. Winding slot; 131. Trapezoidal slot; 132. Rectangular slot; 14. Stator tooth; 141. Stator core tooth; 15. Limit plate; 2. Odd-layer hairpin winding; 21. Round wire winding; 211. U2 phase input terminal; 212. U2 phase output terminal; 213. V2 phase input terminal; 214. V2 phase output terminal; 215. W2 phase input terminal; 216 , W2 phase output terminal; 217, neutral point; 22, hairpin winding; 221, U1 phase input terminal; 222, U1 phase output terminal; 223, V1 phase input terminal; 224, V1 phase output terminal; 225, W1 phase input terminal; 226, W1 phase output terminal; 23, U phase input terminal; 24, U phase output terminal; 25, V phase input terminal; 26, V phase output terminal; 27, W phase input terminal; 28, W phase output terminal. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0036] like Figure 1-5 The embodiment of the present invention shown is a hairpin winding with an odd number of layers and adjustable turns, comprising: a stator core 1 and a plurality of hairpin windings 2 with an odd number of layers, wherein the stator core 1 is provided with a winding insertion side 11 at one end and a winding welding side 12 at the other end; the hairpin windings 2 with an odd number of layers include a round wire winding 21 and a hairpin winding 22; a plurality of winding slots 13 are evenly distributed along the inner wall of the stator core 1, and the winding slots 13 include a single layer of trapezoidal slots 131 and a plurality of layers of rectangular slots 132; the round wire windings 21 are embedded in the trapezoidal slots 131, and the hairpin windings 22 are respectively inserted into the plurality of layers of rectangular slots 132; the hairpin windings 22 are arranged in an integer number of layers, and the round wire windings 21 are arranged in an odd number of layers, and the number of turns can be pre-adjusted.

[0037] Specifically, the odd-layer hairpin winding with adjustable turns is achieved by adding a round wire winding 21 to the odd-layer hairpin winding 2 to replace a part of the hairpin winding 22. The round wire winding 21 has an adjustable number of turns. The number of turns of the round wire winding 21 is pre-adjusted according to the motor power before installing the winding, and the round wire winding 21 is always kept at an odd number of turns. This can effectively avoid the odd-layer hairpin winding 2 from generating a higher AC resistance in an ultra-high-speed environment, keep the overall AC resistance of the winding within a reasonable range, prevent the motor from experiencing a decrease in efficiency and severe heat generation, and ensure that the motor can operate stably and efficiently under ultra-high-speed conditions.

[0038] The existing odd-layer hairpin winding 2 cannot be serialized due to the limited number of turns. When the working voltage and power change, it needs to be redesigned, which extends the motor design cycle and increases the manufacturing cost. However, when the round wire winding 21 with adjustable turns is adopted in the present application, when facing changes in the working voltage and power, the number of turns of the round wire winding 21 can be adjusted to adapt to different working conditions, without the need to redesign the entire winding, effectively improving the versatility and applicability of the motor, and greatly shortening the design cycle of the motor, reducing design and manufacturing costs, and improving production efficiency.

[0039] like Figure 3-5 As shown, the odd-layer hairpin winding 2 includes three phases of U, V and W, the U phase includes the U phase input terminal 23 and the U phase output terminal 24, the V phase includes the V phase input terminal 25 and the V phase output terminal 26, and the W phase includes the W phase input terminal 27 and the W phase output terminal 28, and is respectively composed of the three-phase hairpin winding 22 and the three-phase round wire winding 21.

[0040] Specifically, since the odd-layer hairpin winding 2 includes three phases: U, V and W, the U phase includes a U-phase input terminal 23 and a U-phase output terminal 24, the V phase includes a V-phase input terminal 25 and a V-phase output terminal 26, and the W phase includes a W-phase input terminal 27 and a W-phase output terminal 28, and is respectively composed of three-phase hairpin windings 22 and three-phase round wire windings 21; the hairpin winding 22 has the advantages of high slot fill rate, good heat dissipation performance, and high power density, while the round wire winding 21 has the flexibility of adjustable number of turns; combining the three-phase hairpin winding 22 and the three-phase round wire winding 21 can give full play to the advantages of both; and by adjusting the number of turns of the round wire winding 21, the performance of the motor can be optimized according to different application requirements and working conditions, such as adjusting the voltage, current, torque and other parameters of the motor, so that the motor can better adapt to various complex working conditions and meet the performance and usage requirements of the motor under ultra-high-speed working conditions.

[0041] Furthermore, if Figure 5 As shown, the three phases of the hairpin winding 22 include U1 phase winding, V1 phase winding and W1 phase winding, and the three phases of the round wire winding 21 include U2 phase winding, V2 phase winding and W2 phase winding; the U1 phase winding includes a U1 phase input terminal 221 and a U1 phase output terminal 222, the V1 phase winding includes a V1 phase input terminal 223 and a V1 phase output terminal 224, and the W1 phase winding includes a W1 phase input terminal 225 and a W1 phase output terminal 226. The U1 phase input terminal 221, U1 phase output terminal 222, V1 phase input terminal 223, V1 phase output terminal 224, W1 phase input terminal 225 and W1 phase output terminal 226 are all arranged on the winding welding side 12.

[0042] Specifically, since the three-phase hairpin winding 22 includes a U1-phase winding, a V1-phase winding, and a W1-phase winding, the three-phase round wire winding 21 includes a U2-phase winding, a V2-phase winding, and a W2-phase winding; the U1-phase winding includes a U1-phase input terminal 221 and a U1-phase output terminal 222, the V1-phase winding includes a V1-phase input terminal 223 and a V1-phase output terminal 224, and the W1-phase winding includes a W1-phase input terminal 225 and a W1-phase output terminal 226, the U1-phase input terminal 221, the U1-phase output terminal 222, the V1-phase input terminal 223, the V1-phase output terminal 224, and the W1-phase output terminal 226 are connected. The input terminal 225 and the W1 phase output terminal 226 are both arranged on the winding welding side 12; the independent terminals can avoid the mutual influence of currents between different phases, ensuring that each phase winding can work independently and stably; and the independent input and output terminals make the control of the motor more flexible and precise, and can adjust the current and voltage of each phase winding according to different working conditions and needs, thereby optimizing the performance of the motor and achieving smooth operation and efficient operation of the motor; in addition, the terminals of the three phases of the hairpin winding 22 are concentrated on the winding welding side, which is convenient for troubleshooting and maintenance, effectively reducing maintenance time and workload.

[0043] Furthermore, if Figure 4 As shown, the U2 phase winding includes a U2 phase input terminal 211 and a U2 phase output terminal 212, the V2 phase winding includes a V2 phase input terminal 213 and a V2 phase output terminal 214, and the W2 phase winding includes a W2 phase input terminal 215 and a W2 phase output terminal 216; the round wire winding 2 also includes a neutral point 217, and the U2 phase output terminal 212, the V2 phase output terminal 214 and the W2 phase output terminal 216 are short-circuited with the neutral point 217 respectively.

[0044] Specifically, since the U2 phase winding includes a U2 phase input terminal 211 and a U2 phase output terminal 212, the V2 phase winding includes a V2 phase input terminal 213 and a V2 phase output terminal 214, and the W2 phase winding includes a W2 phase input terminal 215 and a W2 phase output terminal 216; the round wire winding 21 also includes a neutral point 217, and the U2 phase output terminal 212, the V2 phase output terminal 214, and the W2 phase output terminal 216 are short-circuited with the neutral point 217 respectively; by short-circuiting the U2 phase output terminal 212, the V2 phase output terminal 214, and the W2 phase output terminal 216 with the neutral point 217 respectively, a common reference point can be provided for the three-phase current. It helps to balance the three-phase voltage; when the three-phase load is unbalanced, the neutral point 217 can play a regulating role to keep the voltage of each phase relatively stable, reduce the damage to the motor caused by voltage imbalance, and prevent local overheating of the motor, reduced efficiency and other problems, thereby ensuring the operating stability and reliability of the motor; and the existence of the neutral point 217 provides a path for harmonic current, and part of the harmonic current can flow back to the power supply through the neutral point 217, thereby reducing the accumulation of harmonics in the motor windings, suppressing the harm of harmonics to the motor, and improving the power quality and operating efficiency of the motor; at the same time, by using the neutral point 217 to communicate and exchange data with the power grid, remote monitoring and control of the motor can be achieved.

[0045] Furthermore, if Figure 4 As shown, the hairpin winding 22 shares the neutral point 217 of the round wire winding 21 .

[0046] Since the hairpin winding 22 shares the neutral point 217 of the round wire winding 21, the three-phase currents of the round wire winding 21 and the hairpin winding 22 can influence and adjust each other, thereby better achieving the balance of the three-phase currents, enabling both to operate under appropriate working conditions, giving full play to their respective advantages, and improving the overall power output capacity of the motor. At the same time, it reduces the number of circuit connection points and lines, thereby reducing the probability of electrical failure.

[0047] According to an embodiment of the present invention, Figure 2 As shown, the stator core 1 includes stator teeth 14 , a limit plate 15 is provided on the stator teeth 14 , the round wire winding 21 is provided on one side of the limit plate 15 , and the hairpin winding 22 is provided on the other side of the limit plate 15 .

[0048] Specifically, since the stator core 1 includes stator teeth 14, a limiting plate 15 is provided on the stator teeth 14, the round wire winding 21 is provided on one side of the limiting plate 15, and the hairpin winding 22 is provided on the other side of the limiting plate 15; the limiting plate 15 provides a clear installation position and boundary for the round wire winding 21 and the hairpin winding 22, and can clearly distinguish the installation areas of the two windings during the assembly process to avoid installation confusion; and can effectively limit the position of the round wire winding 21 and the hairpin winding 22 to prevent them from being displaced or shaken due to vibration, electromagnetic force and other factors during the operation of the motor, thereby ensuring the stability of the winding and improving the overall reliability of the motor; at the same time, the round wire winding 21 and the hairpin winding 22 will generate an electromagnetic field when working. Arranging them on both sides of the limiting plate 15 respectively can increase the physical distance between the two, thereby reducing electromagnetic interference between them and ensuring the stability of the electrical performance of the motor.

[0049] Furthermore, if Figure 6 As shown, the stator teeth 14 include a plurality of groups of stator core teeth 141 , and a plurality of odd-numbered layers of hairpin windings 2 are correspondingly arranged in the plurality of stator core teeth 141 .

[0050] Specifically, since the stator teeth 14 include several groups of stator core teeth 141, by correspondingly arranging several odd-numbered layers of hairpin windings 2 in several stator core teeth 141, the odd-numbered layers of hairpin windings 2 are reasonably distributed in the stator core teeth 141, which can make the magnetic field generated by the winding more concentrated and uniform. When current passes through the winding, the magnetic fields generated by each layer of winding are superimposed on each other, thereby enhancing the magnetic field strength inside the motor, which can improve the torque output capacity of the motor, so that the motor can output greater power under the same current and voltage conditions, and meet the needs of more high-load application scenarios.

[0051] Furthermore, the surface of each conductor of the round wire winding 21 is coated with an insulating coating.

[0052] Specifically, by coating the surface of each conductor of the round wire winding 21 with an insulating coating, effective electrical isolation is formed between the conductors, preventing current from flowing in unintended paths, greatly reducing the probability of faults such as short circuits and leakage, enhancing the insulation performance of the round wire winding 21, and further improving the performance and reliability of the motor.

[0053] It should also be noted that a temperature sensor is respectively provided in each of the winding grooves 13 .

[0054] Specifically, since temperature sensors are respectively provided in several winding grooves 13, the temperature changes in the winding grooves 13 can be monitored in real time. Once the temperature exceeds the safety threshold, an alarm can be immediately issued, so that the staff can take corresponding measures in time to avoid damage to the motor due to overheating, prevent serious accidents such as aging of insulation materials, short circuit and even fire, and effectively protect the overall structure and performance of the motor.

[0055] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A hairpin winding with an odd number of layers and adjustable turns, characterized in that: include: A stator core and a plurality of odd-numbered layers of hairpin windings, wherein one end of the stator core is provided with a winding insertion side and the other end is provided with a winding welding side; The odd-numbered-layer hairpin winding includes a round wire winding and a hairpin winding; A plurality of winding slots are evenly distributed along the inner wall of the stator core, and the winding slots include a single layer of trapezoidal slots and a plurality of layers of rectangular slots; The round wire winding is embedded in the trapezoidal slot, and the hairpin windings are respectively inserted into the rectangular slots of several layers; The hairpin winding is arranged to have an integer number of layers, and the round wire winding is arranged to have an odd number of layers, and the number of turns can be pre-adjusted.

2. The hairpin winding with an adjustable number of turns and odd layers according to claim 1, characterized in that: The odd-layer hairpin winding includes three phases: U, V and W. The U phase includes a U-phase input terminal and a U-phase output terminal, the V phase includes a V-phase input terminal and a V-phase output terminal, and the W phase includes a W-phase input terminal and a W-phase output terminal, and is respectively composed of three phases of the hairpin winding and three phases of the round wire winding.

3. The hairpin winding with an adjustable number of turns and odd layers according to claim 2, characterized in that: The three-phase hairpin winding includes a U1 phase winding, a V1 phase winding, and a W1 phase winding, and the three-phase round wire winding includes a U2 phase winding, a V2 phase winding, and a W2 phase winding.

4. The hairpin winding with an odd number of layers and adjustable turns according to claim 3, characterized in that: The U1 phase winding includes a U1 phase input terminal and a U1 phase output terminal, the V1 phase winding includes a V1 phase input terminal and a V1 phase output terminal, and the W1 phase winding includes a W1 phase input terminal and a W1 phase output terminal. The U1 phase input terminal, U1 phase output terminal, V1 phase input terminal, V1 phase output terminal, W1 phase input terminal and W1 phase output terminal are all arranged on the welding side of the winding.

5. The hairpin winding with an odd number of layers and adjustable turns according to claim 4, characterized in that: The U2-phase winding includes a U2-phase input terminal and a U2-phase output terminal, the V2-phase winding includes a V2-phase input terminal and a V2-phase output terminal, and the W2-phase winding includes a W2-phase input terminal and a W2-phase output terminal.

6. The hairpin winding with an odd number of layers and adjustable turns according to claim 5, characterized in that: The round wire winding further includes a neutral point, and the U2 phase output terminal, the V2 phase output terminal, and the W2 phase output terminal are short-circuited with the neutral point respectively.

7. The hairpin winding with an odd number of layers and adjustable turns according to any one of claims 1 to 6, characterized in that: The stator core includes stator teeth, a limiting plate is provided on the stator teeth, the round wire winding is provided on one side of the limiting plate, and the hairpin winding is provided on the other side of the limiting plate.

8. The hairpin winding with an odd number of layers and adjustable turns according to claim 7, characterized in that: The stator teeth include a plurality of groups of stator core teeth, and a plurality of the odd-numbered layers of hairpin windings are correspondingly arranged in the plurality of stator core teeth.

9. The hairpin winding with an odd number of layers and adjustable turns according to claim 8, characterized in that: The surface of each conductor of the round wire winding is coated with an insulating coating.

10. The hairpin winding with an odd number of layers and adjustable turns according to any one of claims 1 to 9, characterized in that: Temperature sensors are respectively arranged in a plurality of the winding grooves.

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