Permanent magnet motor coil shaping and curing method and device based on high-frequency induction heating

Abstract

This invention relates to the field of motor structure and manufacturing technology, specifically to a method and apparatus for shaping and curing permanent magnet motor coils based on high-frequency induction heating. The method includes: S1, winding at least one strand of coil using self-adhesive enameled wire in a shaping fixture; S2, partially shaping the outer section of the coil in the shaping fixture; S3, outputting a high-frequency alternating current to an external coil located within the shaping fixture, causing a high-frequency alternating magnetic field to act on the outer section of the coil, generating eddy currents inside the self-adhesive enameled wire, heating and solidifying it to obtain a bonded arc / straight line segment; S4, based on S3, removing the shaping fixture to obtain a coil with the bonded arc / straight line segment. This invention directly winds the coil in the shaping fixture, integrating winding and shaping into a single process, reducing processing steps and improving shaping production efficiency.

Description

Technical Field

[0001] This invention relates to the field of motor structure and manufacturing technology, and more specifically, to a method, curing device and permanent magnet device for shaping and curing permanent magnet motor coils based on high-frequency induction heating. Background Technology

[0002] The stator of a permanent magnet motor consists of an in-slot conductor section embedded in the stator slot and an out-of-slot coil section located outside the slot opening. Compared to the in-slot conductor section, the out-of-slot coil section lacks the constraint of the slot wall, making it prone to localized loosening, outward expansion, and inconsistent interlayer gaps. On the one hand, the alternating electromagnetic force generated by the alternating current in the out-of-slot coil section causes micro-vibrations between the conductors, resulting in noise. On the other hand, loosening leads to uneven distribution of the magnetic field outside the slot and increased leakage flux at the ends, resulting in weakened effective magnetic field coupling, which in turn adversely affects the motor efficiency. Summary of the Invention

[0003] In view of this, the present invention proposes a method, curing device and permanent magnet device for shaping and curing permanent magnet motor coils based on high-frequency induction heating, which aims to solve the problems of electromagnetic vibration noise and reduced motor efficiency caused by the lack of constraint on the wires located outside the stator slots of the coil stator in the current technology.

[0004] This invention proposes a method for shaping and curing permanent magnet motor coils based on high-frequency induction heating, comprising the following steps: S1. At least one winding coil is made in the shaping fixture using self-adhesive enameled wire; S2. After the winding is completed, the outer coil sections of the winding coil located outside the two ends of the stator slot are respectively shaped in the shaping fixture for local shaping. S3. Output a high-frequency alternating current to the external coil located in the shaping fixture, so that the external coil generates a high-frequency alternating magnetic field. The high-frequency alternating magnetic field acts on the outer coil section of the slot, causing eddy currents to be generated inside the self-adhesive enameled wire and heating and solidifying it, thereby forcing at least a portion of the outer coil section of the slot to be shaped into an adhesive arc / straight line segment. S4. Based on S3, remove the shaping fixture to obtain a wound coil with the aforementioned adhesive arc / straight line segment.

[0005] Preferably, in step S1, the shaping fixture includes two fixture bodies with winding grooves, and the two fixture bodies move towards each other or away from each other under the drive of linear power.

[0006] Preferably, the fixture body includes a shaping fixture and a pressure block. The outer coil sections of the winding coil located outside the two ends of the stator slot are wound into the opening slots of a shaping fixture through the opening of the fixture, and then the opening of the fixture is closed by the pressure block.

[0007] Preferably, when the pressure block closes the fixture opening of the shaping fixture, the spherical spring beads at both ends of the pressure block automatically engage with the flared notches on both sides of the fixture opening, so that the connecting wire group one inside the pressure block and the connecting wire group two inside the shaping fixture form a closed path for heating, that is, an external coil is formed.

[0008] Preferably, step S3 specifically includes: S31. A high-frequency alternating current is output to the external coil via a high-frequency power supply, and the real-time temperature of the coil section outside the slot is monitored by a temperature sensor to obtain the real-time temperature. ; S32, based on real-time temperature Compared with the preset target temperature curve Construction temperature deviation ; S33. Using the proportional, integral, and derivative terms of the temperature deviation as the current amplitude control input, dynamically adjust the amplitude of the high-frequency alternating current of the external coil. ; S34. First, use the first current amplitude to bring the outer coil section of the slot into the heating stage, so that the real-time temperature... Rapidly heat to the self-adhesive layer activation temperature, then use a second current amplitude to bring the outer coil section into the curing stage, thus controlling the real-time temperature. Maintain the curing temperature range and keep it within the preset time to complete the adhesion and curing; S35, when the real-time temperature When the threshold is reached and the preset time is maintained, the high-frequency power output will be automatically reduced or stopped to end the curing heating.

[0009] Preferably, in step S31, the frequency of the high-frequency alternating current output to the external coil via the high-frequency power supply is within a preset fixed range.

[0010] Preferably, the current amplitude in step S33 The closed-loop control law is as follows: ; In the formula, This represents the limiting function to ensure the current amplitude. In Within the range, and These represent the lower and upper limits of the alternating current amplitude that the external coil can output, respectively. The initial current amplitude of the alternating current of the external coil; , , These are the current amplitudes. The proportional term coefficient, integral term coefficient, and derivative term coefficient of closed-loop control.

[0011] Preferably, in step S34, the amplitude of the first current is greater than the amplitude of the second current.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the winding coil is directly wound into a shaping fixture. An external coil is set inside the shaping fixture. The winding coil is locally heated and solidified by high-frequency induction eddy current self-heating, so that the heated part of the winding coil quickly generates heat and rises in temperature, thus achieving bonding and shaping.

[0013] Second, the winding and shaping are completed in one step, reducing processing steps and improving shaping production efficiency.

[0014] Third, by constraining and bonding the coil sections protruding from the stator core at both axial ends to form bonded arc / straight sections, the shape of this portion of the coil remains stable, reducing the relative displacement and vibration amplitude of the coil conductors and thus lowering the operating noise of the motor. Furthermore, this avoids the problems of uneven magnetic field distribution outside the stator slots and increased end leakage flux caused by the outward expansion and loosening of this portion of the coil, thereby preventing a weakening of effective magnetic field coupling and improving the efficiency of the motor.

[0015] This invention proposes a permanent magnet motor coil shaping and curing device based on the aforementioned high-frequency induction heating method for shaping and curing permanent magnet motor coils. The device includes a shaping fixture, comprising two fixture bodies with winding slots. These two fixture bodies move towards or away from each other under the drive of linear power. Each fixture body includes a shaping clamp and a pressure block. The coil segments outside the stator slots are wound through the clamp openings and placed into the opening slots of one shaping clamp. The clamp opening is then closed by the pressure block. When the pressure block closes the clamp opening, the spherical spring beads at both ends of the pressure block automatically engage with the flared notches on both sides of the clamp opening, forming a closed heating path between the first connecting wire group inside the pressure block and the second connecting wire group inside the shaping clamp, thus forming an external coil.

[0016] It is understood that the permanent magnet motor coil shaping and curing device of the present invention has the same beneficial effects as the above-mentioned permanent magnet motor coil shaping and curing method based on high frequency induction heating, and will not be repeated here.

[0017] The present invention proposes a permanent magnet device for obtaining a wound coil using the aforementioned method for shaping and curing permanent magnet motor coils based on high-frequency induction heating. The device includes a housing, a stator assembly and a permanent magnet rotor rotatably connected to the housing and inserted into the stator assembly. The permanent magnet rotor includes a rotor core and permanent magnet blocks embedded in the rotor core. The permanent magnet blocks have block protrusions at both ends that protrude from the axial ends of the rotor core. The curing arc / straight line segment of the stator assembly and the block protrusions at the corresponding ends of the permanent magnet rotor are flush.

[0018] It is understood that the permanent magnet device in this invention has the same beneficial effects as the aforementioned method for shaping and curing permanent magnet motor coils based on high-frequency induction heating, and will not be repeated here. Furthermore, the flush arrangement of the bonding arc / straight line segment of the stator assembly and the corresponding block protrusions at the permanent magnet rotor ends optimizes heat dissipation, simplifies installation and maintenance procedures, and reduces operating noise. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A high-frequency power supply control diagram provided for an embodiment of the present invention; Figure 2 This is a front sectional view of a permanent magnet device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly structure of one end of the wound coil and the fixture body provided in an embodiment of the present invention; Figure 4 Provided for embodiments of the present invention Figure 2 A front sectional view; Figure 5 This is a schematic diagram of the structure of the fixture body provided in an embodiment of the present invention; Figure 6 This is a top sectional view of a permanent magnet device provided in an embodiment of the present invention.

[0020] In the diagram: 1. Housing; 2. Winding coil; 21. Outer slot coil section; 211. Adhesive arc / straight line section; 22. Linear coil section; 3. Permanent magnet block; 31. Block protrusion; 4. Rotor core; 41. Tooth; 51. Shaping fixture; 511. Trumpet-shaped notch; 512. Connecting wire group two; 52. Pressure block; 521. Spherical spring bead; 522. Connecting wire group one; 6. High-frequency power supply; 7. Temperature sensor. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1 See Figure 2 , Figure 4 , Figure 5 As shown, this embodiment is based on a shaping and curing method for permanent magnet motor coils using high-frequency induction heating, employing a shaping and curing device, combined with... Figure 3 As shown, it includes a shaping fixture, which comprises two fixture bodies with winding grooves. The two fixture bodies move towards or away from each other under the drive of linear power. Each fixture body includes a shaping clamp 51 and a pressure block 52. The outer coil section 21 of the winding coil 2, located outside the stator slots, is wound through the clamp openings into the slots of the shaping clamp 51. The clamp opening is then closed by the pressure block 52. When the pressure block 52 closes the clamp opening of the shaping clamp 51, the spherical spring beads 521 at both ends of the pressure block 52 automatically engage with the flared notches 511 on both sides of the clamp opening, forming a closed path for heating between the first connecting wire group 522 inside the pressure block 52 and the second connecting wire group 512 inside the shaping clamp 51, thus forming an external coil. The shaping and curing method includes the following steps: S1. At least one winding coil 2 is wound in a shaping fixture using self-adhesive enameled wire. After being heated and softened, the self-adhesive enameled wire can soften and adhere to the winding coil 2 at the contact point, and then solidify and shape it.

[0023] The wound coil 2 includes two linear coil segments 22 installed in the stator slots, and two slot-out coil segments 21 connecting the two linear coil segments 22.

[0024] S2. After the winding is completed, the outer coil section 21 of the winding coil 2 located outside the two ends of the stator slot is partially shaped in the shaping fixture.

[0025] Specifically, for example, the outer coil section 21 of one winding coil 2 located outside the two ends of the stator slot is partially shaped in a shaping fixture; or the outer coil section 21 of multiple winding coils 2 located outside the two ends of the stator slot is partially shaped together in a shaping fixture.

[0026] The two linear coil segments 22 of the wound coil 2 located in the stator slots are not shaped by the shaping fixture, meaning they are the parts that will be inserted into the stator slots later. During the winding process of the wound coil 2, the shaping fixture's constraint and shaping effect ensures the accuracy of the winding, while reducing the shaping winding time and improving efficiency.

[0027] The shaping fixture is preferably made of non-metallic materials, such as engineering plastics and ceramic materials, in order to reduce the influence of alternating magnetic fields on the shaping fixture and improve heating consistency.

[0028] Preferably, in step S1, the shaping fixture includes two fixture bodies with winding grooves, and the two fixture bodies move towards each other or away from each other under the drive of linear power.

[0029] The clamping contact surface of the fixture body has a rectangular structure or a surface structure that matches the target contour of the outer coil part of the slot.

[0030] Before winding, the two fixture bodies maintain a preset distance under the linear power drive provided by the robot to facilitate winding and shaping. After the winding and shaping is completed, the two fixture bodies move towards each other to facilitate the unwinding of the coil 2. Then, the two fixture bodies move away from each other to return to the initial state of the preset distance.

[0031] Preferably, combined with Figure 4 and Figure 5 As shown, the fixture body includes a shaping jig 51 and a pressure block 52. The outer coil section 21 of the winding coil 2 located outside the two ends of the stator slot is wound into the opening slot of the shaping jig 51 through the jig opening, and then the jig opening is closed by the pressure block 52.

[0032] The separate design of the fixture body facilitates coil winding and unwinding. The open slot in the shaping fixture 51 is used to guide the coil winding in an orderly manner. The pressure block 52 is used to constrain and shape the part of the coil located in the shaping fixture 51 after winding, which reduces the difficulty and time of operation and improves production efficiency.

[0033] Preferably, combined with Figure 5 As shown, when the pressure block 52 closes the clamp opening of the shaping fixture 51, the spherical spring beads 521 at both ends of the pressure block 52 automatically engage with the flared notches 511 on both sides of the clamp opening, so that the connecting wire group 1 522 inside the pressure block 52 and the connecting wire group 2 512 inside the shaping fixture 51 form a closed path for heating, that is, an external coil is formed.

[0034] Specifically, combined Figure 5 As shown, the pressure block 52 has a connecting wire assembly 522 inside, and each end of the connecting wire assembly 522 has a spherical spring bead 521. In its natural state, at least a portion of the spherical spring bead 521 protrudes from the side wall of the pressure block 52. When the pressure block 52 is inserted into the opening slot of the shaping fixture 51, the spherical spring beads 521 at both ends of the pressure block 52 are first compressed by force until they automatically engage with the trumpet-shaped notch 511 of the shaping fixture 51. The shaping fixture 51 has a connecting wire assembly 512 inside, and the two ends of the connecting wire assembly 512 form a closed circuit with the two ends of the connecting wire assembly 522 through the spherical spring beads 521, thus forming an external coil for heating.

[0035] The shaping fixture, combined with an external coil for heating, integrates winding constraint and heating, bonding, curing, and shaping into a single process. This reduces the number of coil transfers, minimizes human error, shortens the production cycle, and improves overall production efficiency and product quality stability. Traditional processing methods separate these steps, each requiring individual equipment and operation, resulting in complex production processes, large space requirements, long processing times, and high costs.

[0036] S3. Output a high-frequency alternating current to the external coil located in the shaping fixture, so that the external coil generates a high-frequency alternating magnetic field. The high-frequency alternating magnetic field acts on the outer coil section 21, causing eddy currents to be generated inside the self-adhesive enameled wire and heating and bonding and solidifying it, thereby forcing at least a portion of the outer coil section 21 to be shaped into an adhesive arc / straight line section 211.

[0037] The outer coil section 21 is heated by high-frequency induction eddy current self-heating, while the two linear coil sections 22 located in the stator slot of the winding coil 2 are not heated. The high-frequency induction eddy current self-heating method can precisely control the heating layer, heating the surface and not the interior, so that the self-adhesive enameled wire on the surface is heated and softened and adhered, thereby shaping at least part of the outer coil section 21 into an adhesive arc / straight line section 211.

[0038] Preferably, step S3 specifically includes: S31. A high-frequency alternating current is output to the external coil via the high-frequency power supply 6, and the temperature of the external coil section 21 is monitored in real time by the temperature sensor 7 to obtain the real-time temperature. .

[0039] Combination Figure 1 and Figure 4 As shown, the high-frequency power supply 6 is connected to the external coil via wired or wireless means. The high-frequency power supply 6 can also be connected to a controller via wired or wireless means, allowing the controller to control the magnitude of the high-frequency alternating current output by the high-frequency power supply 6. The temperature sensor 7 is connected to the controller via wireless or wired means. The controller model can be, for example, Silicon Source RY8413, and the temperature sensor model can be, for example, TMP117 or DS18B20. These can be selected according to specific circumstances, and this embodiment does not impose specific limitations on them.

[0040] Preferably, in step S31, the frequency of the high-frequency alternating current output to the external coil via the high-frequency power supply 6 falls within a preset fixed range. For example, the frequency range of the high-frequency alternating magnetic field is 800kHz-1000kHz.

[0041] S32, based on real-time temperature Compared with the preset target temperature curve Construction temperature deviation .

[0042] S33. Using the proportional, integral, and derivative terms of the temperature deviation as the current amplitude control input, dynamically adjust the amplitude of the high-frequency alternating current of the external coil. .

[0043] Preferably, the current amplitude in step S33 The closed-loop control law is as follows: ; In the formula, This represents the limiting function to ensure the current amplitude. In Within the range, and These represent the lower and upper limits of the alternating current amplitude that the external coil can output, respectively. The initial current amplitude of the alternating current of the external coil; , , These are the current amplitudes. The proportional term coefficient, integral term coefficient, and derivative term coefficient of closed-loop control.

[0044] Using the proportional, integral, and derivative terms of this temperature deviation as the current amplitude control input, the amplitude of the alternating current of the external coil is dynamically adjusted. To control the heating rate and suppress temperature overshoot.

[0045] S34. First, use the first current amplitude to bring the outer coil section 21 of the slot into the heating stage, so that the real-time temperature... The temperature is rapidly increased to the self-adhesive layer activation temperature, and then the outer coil section 21 is brought into the curing stage with a second current amplitude, so that the real-time temperature is maintained. Maintain the curing temperature range and keep it within the preset time to complete the adhesion and curing.

[0046] Preferably, in step S34, the amplitude of the first current is greater than the amplitude of the second current.

[0047] During the heating phase, the initial current amplitude of the alternating current in the external coil... Set to a higher amplitude; preferably, set to... During the curing stage, the initial current amplitude of the external coil alternating current... Set to a lower amplitude, preferably set to .

[0048] In this embodiment, a high-frequency induction eddy current self-heating method is used to generate eddy currents inside the self-adhesive enameled wire and self-heat it. The heating process includes a heating stage and a curing stage. During the heating stage, a large current amplitude is output to rapidly heat the outer coil section 21 to the self-adhesive layer activation temperature. During the curing stage, a small current amplitude is output to maintain the temperature within the curing temperature range for a preset time, thereby triggering the softening of the self-adhesive enameled wire and achieving adhesion and curing at the contact point with the coil.

[0049] Furthermore, the target temperature curve Set as a segmented curve: the target temperature in the heating stage rises rapidly to the self-adhesive layer activation temperature, and the target temperature in the curing stage is maintained within the curing temperature range for a preset time to complete the adhesion and curing.

[0050] Meanwhile, the control parameters of the external coil are not limited to the current amplitude; they can be output power, pulse duty cycle, etc., and can be adjusted according to the actual situation.

[0051] S35, when the real-time temperature When the threshold is reached and the preset time is maintained, the output of the high-frequency power supply 6 will be automatically reduced or stopped to end the curing heating.

[0052] S4. Based on S3, maintain the constraints while cooling and shaping, then release the shaping fixture to obtain the shaped wound coil 2. Cooling and shaping includes natural cooling or forced air cooling, and the constraints of the shaping fixture are maintained during the cooling process. The shaped wound coil 2 is then ready for the slotting process.

[0053] Example 2 Combination Figure 3 As shown, this embodiment provides a permanent magnet device for obtaining a wound coil 2 using a permanent magnet motor coil shaping and curing method based on high-frequency induction heating. It includes a housing 1, a stator assembly and a permanent magnet rotor rotatably connected to the housing 1 and inserted into the stator assembly. The permanent magnet rotor includes a rotor core 4 and a permanent magnet block 3 embedded in the rotor core 4. The permanent magnet block 3 has block protrusions 31 at both ends that protrude from the axial ends of the rotor core 4. The bonding arc / straight line segment 211 of the stator assembly and the block protrusions 31 at the corresponding ends of the permanent magnet rotor are flush.

[0054] The stator assembly includes a stator core and a wound coil 2. The wound coil 2 is fixed in the stator slot of the stator core. The wound coil 2 has an outer slot coil section 21 that protrudes from both ends of the stator core along the axial direction. The outer slot coil section 21 is subjected to a permanent magnet motor coil shaping and curing method based on high-frequency induction heating, so that at least a portion of the outer slot coil forms a bonded arc / straight line segment 211.

[0055] Combination Figure 6As shown, the rotor core 4 of the permanent magnet rotor has several teeth 41 that are evenly distributed in a circle. A permanent magnet block 3 is provided at one end of any tooth 41 to ensure that the permanent magnet blocks 3 are evenly distributed in a circle, thus ensuring a uniform magnetic field distribution, improving the stability of the device operation, and reducing noise.

[0056] The permanent magnet block 3 is made of rare earth-free material, preferably anisotropic strontium ferrite.

[0057] After the outer coil segment 21 of the wound coil 2 is shaped, it is easier to pass through the stator slot of the stator assembly, realize the assembly of the stator assembly, and enable the remaining two linear coil segments 22 that have not been shaped and heated to be better constrained by the stator slot.

[0058] It is understood that the permanent magnet device in this embodiment has the same beneficial effects as the above-mentioned method for shaping and curing permanent magnet motor coils based on high-frequency induction heating, and will not be repeated here. In addition, the bonding arc / straight line segment 211 of the stator assembly and the block protrusion 31 at the corresponding end of the permanent magnet rotor are flush, which can optimize heat dissipation performance, simplify the installation and maintenance process, and reduce operating noise.

[0059] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0060] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0061] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0062] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for shaping and curing permanent magnet motor coils based on high-frequency induction heating, characterized in that, Includes the following steps: S1. At least one winding coil is made in the shaping fixture using self-adhesive enameled wire (2). S2. After the winding is completed, the outer coil section (21) of the winding coil (2) located outside the two ends of the stator slot is locally shaped in the shaping fixture. S3. Output a high-frequency alternating current to the external coil located in the shaping fixture, so that the external coil generates a high-frequency alternating magnetic field. The high-frequency alternating magnetic field acts on the outer coil section (21), causing eddy currents to be generated inside the self-adhesive enameled wire and heating and bonding and solidifying, thereby forcing at least a portion of the outer coil section (21) to be shaped into an adhesive arc / straight line section (211). S4. Based on S3, remove the shaping fixture to obtain a wound coil (2) with the aforementioned adhesive arc / straight line segment (211).

2. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 1, characterized in that, In step S1, the shaping fixture includes two fixture bodies with winding grooves, which move towards each other or away from each other under the drive of linear power.

3. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 2, characterized in that, The fixture body includes a shaping fixture (51) and a pressure block (52). The outer coil section (21) of the winding coil (2) located outside the two ends of the stator slot is wound into the opening slot of a shaping fixture (51) through the opening of the fixture, and then the opening of the fixture is closed by the pressure block (52).

4. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 3, characterized in that, When the pressure block (52) closes the clamp opening of the shaping fixture (51), the spherical spring beads (521) at both ends of the pressure block (52) automatically engage with the flared notches (511) on both sides of the clamp opening, so that the connecting wire group one (522) inside the pressure block (52) and the connecting wire group two (512) inside the shaping fixture (51) form a closed path for heating, that is, an external coil is formed.

5. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 1, characterized in that, Step S3 specifically includes: S31. A high-frequency alternating current is output to the external coil through a high-frequency power supply (6), and the temperature of the external coil section (21) is monitored in real time by a temperature sensor (7) to obtain the real-time temperature. ; S32, based on real-time temperature Compared with the preset target temperature curve Construction temperature deviation ; S33. Using the proportional, integral, and derivative terms of the temperature deviation as the current amplitude control input, dynamically adjust the amplitude of the high-frequency alternating current of the external coil. ; S34. First, use the first current amplitude to make the outer coil section (21) of the slot enter the heating stage, so that the real-time temperature Rapidly raise the temperature to the self-adhesive layer activation temperature, and then use a second current amplitude to bring the outer coil section (21) into the curing stage, so that the real-time temperature... Maintain the curing temperature range and keep it within the preset time to complete the adhesion and curing; S35, when the real-time temperature When the threshold is reached and the preset time is maintained, the high-frequency power supply (6) output is automatically reduced or stopped to end the curing heating.

6. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 5, characterized in that, In step S31, the frequency of the high-frequency alternating current output to the external coil by the high-frequency power supply (6) is within a preset fixed range.

7. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 5, characterized in that, Current amplitude in step S33 The closed-loop control law is as follows: ； In the formula, This represents the limiting function to ensure the current amplitude. In Within the range, and These represent the lower and upper limits of the alternating current amplitude that the external coil can output, respectively. The initial current amplitude of the alternating current of the external coil; , , These are the current amplitudes. The proportional term coefficient, integral term coefficient, and derivative term coefficient of closed-loop control.

8. The method for shaping and curing permanent magnet motor coils based on high-frequency induction heating according to claim 5, characterized in that, In step S34, the amplitude of the first current is greater than the amplitude of the second current.

9. A permanent magnet motor coil shaping and curing apparatus based on the high-frequency induction heating method for shaping and curing permanent magnet motor coils according to any one of claims 1-8, comprising a shaping fixture, characterized in that, The shaping fixture includes two fixture bodies with winding grooves. The two fixture bodies move towards each other or away from each other under the drive of linear power. The fixture body includes a shaping clamp (51) and a pressure block (52). The outer coil section (21) of the winding coil (2) located outside the two ends of the stator groove is wound into the opening groove of a shaping clamp (51) through the clamp opening. Then the clamp opening is closed by the pressure block (52). When the pressure block (52) closes the clamp opening of the shaping clamp (51), the spherical spring beads (521) at both ends of the pressure block (52) automatically engage with the horn-shaped notches (511) on both sides of the clamp opening, so that the connecting wire group one (522) inside the pressure block (52) and the connecting wire group two (512) inside the shaping clamp (51) form a closed passage for heating, that is, an external coil is formed.

10. A permanent magnet device for obtaining a wound coil using the high-frequency induction heating-based permanent magnet motor coil shaping and curing method described in any one of claims 1-8, comprising a housing (1), characterized in that, The housing (1) is provided with a stator assembly and a permanent magnet rotor rotatably connected to the housing (1) and inserted into the stator assembly. The permanent magnet rotor includes a rotor core (4) and a permanent magnet block (3) embedded in the rotor core (4). The permanent magnet block (3) has block protrusions (31) at both ends that protrude from the axial ends of the rotor core (4). The adhesive arc / straight line segment (211) of the stator assembly and the block protrusions (31) at the corresponding ends of the permanent magnet rotor are flush.

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