Motor winding paint dripping control method and motor

Abstract

The invention relates to the technical field of motor production, and discloses a motor winding paint dripping control method and a motor, and the method comprises the steps: detecting the viscosity of paint liquid, and obtaining a first paint dripping angle matched with the viscosity of the paint liquid according to a pre-established viscosity-angle corresponding relation; dividing at least three paint dripping areas according to the structure of the motor rotor: an end winding area, a chute area and a notch area; the first paint dripping angles are adjusted in a differentiated mode corresponding to all the paint dripping areas, and a second paint dripping angle set is obtained; carrying out paint dripping on the motor winding according to the second paint dripping angle set, and standing and permeating to obtain a paint dripping winding; and detecting paint liquid penetration depth distribution of the paint dripping winding, correcting the second paint dripping angle set according to the paint liquid penetration depth distribution, and controlling paint dripping of the motor winding according to the corrected second paint dripping angle set. According to the motor winding paint dripping control method and the motor, it is ensured that paint liquid uniformly permeates all areas of the motor winding, and therefore the insulation quality of the motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor production, and in particular to a motor winding paint dripping control method and a motor. Background Art

[0002] During motor manufacturing, the winding paint dripping process directly affects the insulation performance and mechanical strength. Existing paint dripping processes lack precise adjustment methods for structural differentiation, often resulting in excessive penetration in some areas and insufficient penetration in others. This makes it impossible to maintain a consistent penetration depth throughout the winding area. This uneven penetration effect reduces the insulation performance of the motor. For example, in some motors with a skewed slot rotor structure, the trajectory of the paint dripping is affected by the inclination angle of the slot, resulting in inconsistent penetration depth of the paint liquid within the winding, especially in the slot and skew slot areas. This uneven penetration not only affects the insulation performance of the motor, but can also cause the motor to experience faults such as partial discharge and overheating. In severe cases, it can affect the long-term operational stability of the motor. Summary of the Invention

[0003] To this end, the purpose of the present invention is to overcome the problem of uneven paint penetration of motor windings in the prior art, and to provide a motor winding paint dripping control method and a motor, which can adjust the paint dripping angle differently according to the penetration requirements of different areas to ensure that the paint liquid penetrates evenly in all areas of the motor windings, thereby improving the insulation quality of the motor.

[0004] In a first aspect, in order to solve the above technical problems, the present invention provides a method for controlling paint dripping from a motor winding, comprising:

[0005] Detecting the viscosity of the paint liquid and obtaining a first paint drop angle that matches the viscosity of the paint liquid according to a pre-established viscosity-angle correspondence relationship;

[0006] Dividing the motor rotor structure into at least three paint dripping areas: an end winding area, a skewed slot area, and a notch area; differentially adjusting the first paint dripping angle corresponding to each of the paint dripping areas to obtain a second paint dripping angle set;

[0007] Paint is dripped onto the motor winding according to the second paint dripping angle set, and a paint dripping winding is obtained after standing and penetrating;

[0008] The paint liquid penetration depth distribution of the paint dripping winding is detected, the second paint dripping angle set is corrected according to the paint liquid penetration depth distribution, and the paint dripping of the motor winding is controlled according to the corrected second paint dripping angle set.

[0009] In one embodiment of the present invention, the first paint dripping angle is differentially adjusted corresponding to each of the paint dripping areas to obtain a second paint dripping angle set, including adjusting the first paint dripping angle corresponding to the end winding area to: ; Or, corresponding to the chute area, adjusting the first paint drop angle to: ; Or, corresponding to the notch area, adjust the first paint drop angle to: ;in, Indicates the angle of the first drop of paint; 、 、 The second paint drop angles of the end winding area, the skew area, and the notch area are represented respectively; represents the inclination angle of the chute; k represents the adjustment coefficient, which is between 0.3 and 0.5.

[0010] In one embodiment of the present invention, the control method further includes adjusting the paint liquid viscosity according to the paint liquid penetration depth distribution, and controlling the paint dripping of the motor winding according to the adjusted paint liquid viscosity; and updating the viscosity-angle correspondence.

[0011] In one embodiment of the present invention, the adjustment of the paint liquid viscosity is initiated when and only when the paint liquid penetration depth in the entire area of the paint dripping winding is consistent with the deviation trend of the target depth; wherein, the deviation trend includes the paint liquid penetration depth being greater than the target depth or the paint liquid penetration depth being less than the target depth.

[0012] In one embodiment of the present invention, adjusting the paint liquid viscosity includes, if the paint liquid penetration depth is greater than the target depth, increasing the paint liquid viscosity according to the following method: ;

[0013] If the paint penetration depth is less than the target depth, reduce the paint viscosity as follows: ;

[0014] in, Indicates the adjusted paint viscosity; Indicates the viscosity of the paint being tested; Dt indicates the target depth; and D indicates the measured penetration depth of the paint.

[0015] In one embodiment of the present invention, the paint penetration depth distribution of the paint dripping winding is detected, including dividing the paint dripping winding into multiple detection areas according to its structure; wherein the multiple detection areas at least include the end winding area, the skew area and the notch area; ultrasonic data sets are obtained based on ultrasonic detection corresponding to the multiple detection areas respectively; wherein each ultrasonic data includes echo amplitude, echo arrival time and waveform shape; and the paint penetration depth distribution is obtained by analyzing the ultrasonic data sets.

[0016] In one embodiment of the present invention, the second paint drip angle set is corrected according to the paint liquid penetration depth distribution, including increasing the second paint drip angle if the paint liquid penetration depth is less than the target depth; and decreasing the second paint drip angle if the paint liquid penetration depth is greater than the target depth.

[0017] In one embodiment of the present invention, corresponding to the end winding area, modifying the second paint dripping angle includes increasing the second paint dripping angle according to the following method if the paint liquid penetration depth of the end winding area is less than a target depth: If the paint penetration depth of the end winding area is greater than the target depth, the second paint drip angle is reduced according to the following method: ;in, It represents the corrected second paint drop angle of the end winding area; Dt represents the target depth; and D represents the measured paint penetration depth.

[0018] In one embodiment of the present invention, corresponding to the notch area, modifying the second paint dripping angle includes, if the paint liquid penetration depth in the notch area is less than a target depth, increasing the second paint dripping angle according to the following method:

[0019] ;

[0020] If the paint penetration depth in the notch area is greater than the target depth, the second paint drop angle is reduced as follows:

[0021] ;

[0022] in, represents the corrected second paint drop angle in the notch area; Dt represents the target depth; D represents the measured paint penetration depth; Indicates the speed of the winding when paint is dripping.

[0023] In a second aspect, in order to solve the above technical problems, the present invention further provides a motor, comprising a winding, and paint is dripped on the winding based on the motor winding paint dripping control method.

[0024] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0025] The motor winding paint dripping control method and motor described in the present invention achieve improved penetration uniformity in the entire area of the motor rotor, including the end, skew slot section, and notch area, through three-level control of viscosity-angle dynamic matching → structural partition compensation → penetration depth closed-loop correction.

[0026] Among them, the paint dripping angle is adjusted differently according to the penetration requirements of different areas to ensure that the paint liquid penetrates evenly in various areas of the motor winding.

[0027] The influence of process fluctuations is eliminated through closed-loop control of penetration depth detection → dynamic angle correction.

[0028] Combining the corresponding relationship between paint viscosity and paint dripping angle, the optimal initial paint dripping angle is matched according to the actual detected paint viscosity, which can adapt to the viscosity changes of paint in different production batches and avoid uneven penetration caused by viscosity fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 Flowchart of a method for controlling paint dripping from motor windings in a preferred embodiment of the present invention;

[0031] Figure 2 This is a flow chart of a method for controlling paint dripping on motor windings in another embodiment of the present invention; DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0033] The motor winding paint dripping process involves pretreatment, preheating, paint dripping, penetration and leveling, and curing steps. Pretreatment cleans the rotor to remove oil and dust; the rotor is heated to 60-80°C for preheating to remove moisture from the rotor; while the rotor is rotating, the paint dripping device accurately drips the paint liquid into the winding and evenly distributes it by centrifugal force; after dripping, the paint is left to stand to allow the paint liquid to fully penetrate the gaps; finally, it is cured by high-temperature baking, and the paint liquid polymerizes and solidifies to form an insulating structure.

[0034] The purpose of the embodiments of the present invention is to solve the problem of uneven paint penetration into the motor windings during the paint dripping process, especially for skewed slot rotor motors. Due to the inclination angle of the slots, the paint liquid will deviate with gravity when dripping, making it difficult to evenly penetrate into the slot area, the skewed slot area and the end winding area. There are large differences in the penetration depth of these areas, resulting in uneven filling of the paint liquid inside the winding. Existing processes make it difficult to achieve effective control of uniform paint dripping in such a complex structure.

[0035] Among them, the end winding area is the extension part at both ends of the core lamination, without core support, and the winding is in a free cantilever state. The axial length is usually 1.5 to 2 times the length of the slot (for example, 15 to 20 mm). The paint liquid is easily thrown out under the action of centrifugal force, causing the paint liquid to be lost and the penetration depth is insufficient; the skew slot area is the main part of the core, with a spiral guide bar channel. The paint liquid flow path is prone to deviation and uneven filling; the slot mouth area is the junction of the slot and the outer circle of the rotor, and the paint liquid is prone to capillary accumulation to form paint nodules.

[0036] Example 1: The present invention discloses a method for controlling paint dripping from a motor winding, referring to Figure 1As shown, the control method includes,

[0037] S10, detecting the viscosity of the paint liquid, and obtaining a first paint drop angle that matches the viscosity of the paint liquid according to a pre-established viscosity-angle correspondence relationship;

[0038] S20, dividing the motor rotor structure into at least three paint dripping areas: an end winding area, a skewed slot area, and a notch area; and differentially adjusting the first paint dripping angle for each of the paint dripping areas to obtain a second paint dripping angle set;

[0039] S30, dripping paint on the motor winding according to the second paint dripping angle set, and obtaining the dripped paint winding after standing and penetrating;

[0040] S40: Detecting a paint liquid penetration depth distribution of the paint dripping winding, correcting the second paint dripping angle set according to the paint liquid penetration depth distribution, and controlling paint dripping of the motor winding according to the corrected second paint dripping angle set.

[0041] In specific application scenarios, an online rotational viscometer is installed in the paint supply line or at the front end of the paint dispensing nozzle to measure the paint viscosity. The rotational viscometer calculates viscosity based on the torque resistance of the rotor rotating in the paint. The measured paint viscosity is fed back to the control system in real time. Based on a pre-established viscosity-angle relationship table, the control system selects the optimal dispensing angle for the current paint viscosity. This relationship table, based on extensive experimental data, process experience, or historical data analysis, contains the optimal dispensing angle for different paint viscosities. For example, the target paint (such as epoxy resin) is diluted to 5-6 viscosity gradients, and other parameters are fixed. For each viscosity sample, the control system tests dispensing angles from 30° to 60° in 5° steps. The control system measures and records the paint penetration depth, paint film uniformity, and paint nodule incidence for each combination. The control system then determines the optimal dispensing angle for each viscosity based on the dispensing results.

[0042] Implementation of the embodiments of the present invention requires a specially designed paint dripping device. The device is equipped with independent paint dripping nozzles, each of which can independently control the paint dripping angle. For example, the paint dripping nozzle is mounted on a rotatable bracket, and a servo motor controls the bracket's rotation. An encoder measures the rotation angle, which is the paint dripping angle. The windings are divided into multiple paint dripping areas based on the motor rotor structure. It should be noted that the purpose of dividing the paint dripping areas is to differentiate the paint dripping angles required due to structural differences resulting in different paint flow trajectories. The multiple paint dripping areas are divided accordingly based on the structure of the motor rotor.

[0043] The paint dripping area is divided into at least the end winding area, the chute area, and the notch area. The winding end is a suspended arc-shaped structure without core support, and its axial length is typically 1.5 to 2 times the length of the slot. This leads to insufficient penetration due to centrifugal force, which can easily manifest as insufficient penetration depth and incomplete paint film coverage. The chute angle is typically 15° to 25°, and the slot wall is a spirally asymmetric structure relative to the axis. This causes lateral diversion of the paint liquid along the chute wall. During traditional vertical paint dripping, the actual penetration path deviates, resulting in uneven penetration depth and air gap defects at the root of the chute. The notch width is typically 1.2 to 1.5 times the width of the slot, with a sharp transition angle. Surface tension causes the paint liquid to form a meniscus at the notch mouth, and capillary action causes paint accumulation, resulting in paint nodules and excessive dynamic balance. The first paint dripping angle is adjusted accordingly based on the structural characteristics of each paint dripping area to obtain a second set of paint dripping angles.

[0044] According to the selected second paint dripping angle, the paint liquid is evenly dripped onto the winding surface through the automated paint dripping device, and the paint dripping nozzles in each paint dripping area drip paint at the paint dripping angle set of the second paint dripping angle; after paint dripping, the winding is left to stand for a certain time to allow the paint liquid to fully penetrate into the various gaps inside the winding. The standing time is determined according to the viscosity of the paint liquid and the winding structure to ensure complete penetration.

[0045] After the final rest period and before curing, the paint's penetration depth is measured ultrasonically. The distribution of paint penetration depth is measured by scanning different areas of the winding. It should be noted that penetration depth refers to the maximum vertical distance the paint penetrates along the gaps between the rotor winding conductors (such as the spaces between copper or aluminum wires). Ultrasonic data is used to analyze the uniformity of penetration in each area, and the angle of the second paint drop is corrected based on the deviation between the penetration depth and the target depth. If the penetration depth in a particular area does not meet expectations, the paint drop angle in that area is adjusted. Subsequent paint drop processes are optimized based on the corrected second paint drop angle to ensure uniform paint penetration in every area of the winding.

[0046] The motor winding paint dripping control method of the present invention achieves improved penetration uniformity in the entire area of the motor rotor, including the end, chute section, and notch area, through three-level control: viscosity-angle dynamic matching → structural partition compensation → penetration depth closed-loop correction.

[0047] Among them, the paint dripping angle is adjusted differently according to the penetration requirements of different areas to ensure that the paint liquid penetrates evenly in various areas of the motor winding.

[0048] The influence of process fluctuations is eliminated through closed-loop control of penetration depth detection → dynamic angle correction.

[0049] Combining the corresponding relationship between paint viscosity and paint dripping angle, the optimal initial paint dripping angle is matched according to the actual detected paint viscosity, which can adapt to the viscosity changes of paint in different production batches and avoid uneven penetration caused by viscosity fluctuations.

[0050] Specifically, the first paint dripping angle is differentially adjusted corresponding to each of the paint dripping areas to obtain a second paint dripping angle set, including adjusting the first paint dripping angle corresponding to the end winding area to: ; Or, corresponding to the chute area, adjusting the first paint drop angle to: ; Or, corresponding to the notch area, adjust the first paint drop angle to: ;in, Indicates the angle of the first drop of paint; 、 、 The second paint drop angles of the end winding area, the skew area, and the notch area are represented respectively; represents the inclination angle of the chute; k represents the adjustment coefficient, which is between 0.3 and 0.5.

[0051] In specific application scenarios, the corresponding end winding area has no iron core support, and the paint liquid is easy to fly axially, and the paint liquid loses radially to form a "dry area", resulting in incomplete paint film coverage. Increasing the first drop angle of paint increases the axial velocity component to overcome the radial loss of paint liquid caused by centrifugal force; at the same time, increasing the first drop angle of paint allows the paint liquid to penetrate deeper into the winding gap and increase the capillary pressure. It should be noted that the paint drop angle refers to the angle between the center line of the paint drop nozzle and the normal plane of the rotor axis. Its physical meaning is the degree of deviation between the paint liquid injection direction and the rotor radial direction. Specifically, increase the first drop angle of paint by 5°~8°. Here, 5° and 8° are critical compensation values verified by fluid dynamics simulation and experiments. 5° meets the starting threshold of the minimum effective compensation, and 8° avoids the safety upper limit of paint splashing.

[0052] In the chute area, the chute structure creates an angle between the paint spray direction and the actual winding orientation, causing a deviation in the paint flow path and uneven paint penetration. For example, at a chute angle of 20°, the actual penetration path deviates by 12° to 15°. By increasing the angle of the first paint drop, the deviation between the actual paint flow direction and the chute orientation can be reduced. By compensating for the first paint drop angle in the chute area based on the chute inclination, CFD simulations verified that when the adjustment coefficient is between 0.3 and 0.5, the deviation between the actual paint flow direction and the chute orientation is less than 5°.

[0053] Corresponding to the notch area, the sharp angle structure at the notch causes the paint liquid to accumulate under the action of surface tension to form paint nodules. Reducing the angle of the first drop of paint significantly reduces the radial impact force of the paint liquid and inhibits the formation of paint nodules. It is the optimal solution to resolve the contradiction between notch paint nodules and dynamic balance.

[0054] The viscosity of the paint liquid may change during the production process due to temperature fluctuations, solvent volatilization or batch differences, resulting in a deviation between the actual penetration effect and the expected one. Figure 2 As shown, the control method further includes adjusting the paint liquid viscosity according to the paint liquid penetration depth distribution, and controlling the paint dripping of the motor winding according to the adjusted paint liquid viscosity; and updating the viscosity-angle correspondence.

[0055] In specific application scenarios, compare whether there is a deviation between the paint penetration depth and the target depth. If the paint penetration depth is greater than the target depth, increase the paint viscosity; conversely, if the paint penetration depth is less than the target depth, reduce the paint viscosity. High-viscosity paint has a smaller shear thinning index, and its fluidity decreases at the same shear rate, slowing the penetration rate; increasing the viscosity can reduce the penetration depth growth rate. When the paint penetration depth is greater than the target depth, increase the paint viscosity to drive the paint penetration depth to be consistent with the target depth. Low-viscosity paint has a greater proportion of surface tension and enhanced capillary action. When the paint penetration depth is less than the target depth, reduce the paint viscosity to drive the paint penetration depth to be consistent with the target depth.

[0056] It should be noted here that the target depth is related to the motor's operating voltage, temperature rise level, mechanical stress, and protection level. The target depth is determined in advance based on the above-mentioned parameters during motor production.

[0057] Specifically, adjusting the paint liquid viscosity includes, if the paint liquid penetration depth is greater than the target depth, increasing the paint liquid viscosity according to the following method: ;

[0058] If the paint penetration depth is less than the target depth, reduce the paint viscosity as follows: ;

[0059] in, Indicates the adjusted paint viscosity; Indicates the viscosity of the paint being tested; Dt indicates the target depth; and D indicates the measured penetration depth of the paint.

[0060] In specific application scenarios, Dt-D represents the deviation in penetration depth. The ratio of the penetration depth deviation to the target depth determines the intensity of the adjustment. Increasing the paint viscosity allows for fine-tuning of small deviations and stronger control of large deviations. This automatically matches the severity of the deviation and avoids under- or over-adjustment caused by a fixed coefficient. When reducing the paint viscosity, the viscosity is linearly reduced by the ratio of the current penetration depth to the target depth. When the depth is too deep, the viscosity is significantly reduced, accelerating the return to the target value. At the same time, as the depth approaches the target depth, the adjustment amount naturally decays to avoid oscillation.

[0061] Furthermore, the adjustment of the paint liquid viscosity is initiated when and only when the paint liquid penetration depth in the entire area of the paint dripping winding is consistent with the deviation trend of the target depth; wherein the deviation trend includes the paint liquid penetration depth being greater than the target depth or the paint liquid penetration depth being less than the target depth.

[0062] In specific application scenarios, paint viscosity adjustment is triggered only when the paint penetration depth of the entire winding area is less than or greater than the target depth. If only some areas deviate from the target depth, zoned paint angle adjustment is preferred to prevent viscosity adjustment from interfering with normal areas.

[0063] Specifically, the paint penetration depth distribution of the paint dripping winding is detected, including dividing the paint dripping winding into multiple detection areas according to its structure; wherein the multiple detection areas at least include the end winding area, the skew area and the notch area; ultrasonic data sets are obtained based on ultrasonic detection corresponding to the multiple detection areas respectively; wherein each ultrasonic data includes echo amplitude, echo arrival time and waveform shape; and the paint penetration depth distribution is obtained by analyzing the ultrasonic data sets.

[0064] In specific application scenarios, the paint penetration depth is measured ultrasonically for each inspection area, and the paint penetration depth of all inspection areas forms a paint penetration depth distribution; among them, the echo amplitude, echo arrival time and waveform shape reflect the paint penetration situation from different physical paths: (1) According to the echo amplitude, "shallow penetration is insufficient", "local over-painting", "incoming material consistency" and so on are quickly screened. For example, when the echo amplitude is insufficiently attenuated (such as paint loss caused by centrifugal force in the end winding area), shallow penetration is identified; when the echo amplitude drops sharply (such as paint accumulation in the slot area), local over-painting is identified; when the amplitude difference between rotors in the same batch is greater than a certain value, the rotor incoming material consistency is identified. (2) The penetration depth is calculated based on the echo arrival time. (3) According to the waveform shape, the defect type is intelligently identified, including bubbles / voids, foreign matter contamination and poor fiber infiltration.

[0065] Specifically, the second paint drip angle set is corrected according to the paint liquid penetration depth distribution, including increasing the second paint drip angle if the paint liquid penetration depth is less than the target depth; and decreasing the second paint drip angle if the paint liquid penetration depth is greater than the target depth.

[0066] In specific application scenarios, when the paint liquid penetration depth is less than the target depth, the angle of the second paint drop is increased to enhance axial penetration, prolong capillary action time and suppress the influence of centrifugal force; when the paint liquid penetration depth is greater than the target depth, the angle of the second paint drop is reduced to reduce radial impact force, shorten the paint liquid residence time and prevent paint nodule formation; ultimately, the paint liquid penetration depth is driven to be consistent with the target depth.

[0067] In the embodiment of the present invention, the second paint dripping angle is adjusted differently according to the paint liquid penetration depth in the end winding area, the chute area, and the notch area, specifically:

[0068] Corresponding to the end winding area, modifying the second paint dripping angle includes increasing the second paint dripping angle according to the following method if the paint liquid penetration depth of the end winding area is less than the target depth: If the paint penetration depth of the end winding area is greater than the target depth, the second paint drip angle is reduced according to the following method: ;in, It represents the corrected second paint drop angle of the end winding area; Dt represents the target depth; and D represents the measured paint penetration depth.

[0069] In specific application scenarios, It is understood that 2° is the basic compensation amount, which is used to offset the centrifugal force effect; the slope coefficient of 0.5 indicates that a 1mm penetration deviation requires a compensation of 0.5°; It is understood that 1° is the basic amount to inhibit the radial scattering of the paint liquid and reduce the incidence of paint nodules; the slope coefficient of 0.3 represents a 0.3° compensation for a 1mm penetration deviation, and conservative adjustment is used to avoid excessive angle reduction leading to insufficient penetration.

[0070] Corresponding to the notch area, correcting the second paint dripping angle includes, if the paint liquid penetration depth in the notch area is less than a target depth, increasing the second paint dripping angle according to the following method:

[0071] ;

[0072] If the paint penetration depth in the notch area is greater than the target depth, the second paint drop angle is reduced as follows:

[0073] ;

[0074] in, represents the corrected second paint drop angle in the notch area; Dt represents the target depth; D represents the measured paint penetration depth; Indicates the speed of the winding when paint is dripping.

[0075] In a specific application scenario, when the paint penetration depth in the notch area is less than the target depth, centrifugal force causes paint loss. Over-angle compensation is used to counteract this centrifugal effect. When the speed is 80 rpm or less (i.e., low speed), a fixed compensation of 2° is applied to ensure basic penetration. When the speed is greater than 80 rpm (i.e., high speed), the compensation increases linearly with the speed. When the paint penetration depth in the notch area is greater than the target depth, the angle reduction increases at low speeds and decreases at high speeds. Based on this, in this embodiment of the present invention, the correction of the second paint dripping angle in the notch area is related to the speed of the winding during paint dripping. Adaptive rotor angle compensation is used to accurately counteract the centrifugal force effect. Bidirectional nonlinear adjustment allows for rapid correction of depth deviations.

[0076] Embodiment 2: The embodiment of the present invention discloses a motor, comprising a winding, and paint is dripped on the winding based on the motor winding paint dripping control method.

[0077] The embodiment of the present invention and the first embodiment are based on the same inventive concept and have the same technical effects, and will not be described in detail here.

[0078] In summary, the motor winding paint dripping control method and motor described in the present invention achieves improved penetration uniformity in the entire area of the motor rotor, including the end, skew section, and notch area, through three-level control of viscosity-angle dynamic matching → structural partition compensation → penetration depth closed-loop correction.

[0079] Among them, the paint dripping angle is adjusted differently according to the penetration requirements of different areas to ensure that the paint liquid penetrates evenly in various areas of the motor winding.

[0080] The influence of process fluctuations is eliminated through closed-loop control of penetration depth detection → dynamic angle correction.

[0081] Combining the corresponding relationship between paint viscosity and paint dripping angle, the optimal initial paint dripping angle is matched according to the actual detected paint viscosity, which can adapt to the viscosity changes of paint in different production batches and avoid uneven penetration caused by viscosity fluctuations.

[0082] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0084] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0085] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0086] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A method for controlling paint dripping from motor windings, characterized in that: include, Detecting the viscosity of the paint liquid and obtaining a first paint drop angle that matches the viscosity of the paint liquid according to a pre-established viscosity-angle correspondence relationship; Dividing the motor rotor structure into at least three paint dripping areas: an end winding area, a skewed slot area, and a notch area; differentially adjusting the first paint dripping angle corresponding to each of the paint dripping areas to obtain a second paint dripping angle set; Paint is dripped onto the motor winding according to the second paint dripping angle set, and a paint dripping winding is obtained after standing and penetrating; The paint liquid penetration depth distribution of the paint dripping winding is detected, the second paint dripping angle set is corrected according to the paint liquid penetration depth distribution, and the paint dripping of the motor winding is controlled according to the corrected second paint dripping angle set.

2. The motor winding paint dripping control method according to claim 1, characterized in that: Differentiatingly adjusting the first paint dripping angle corresponding to each of the paint dripping areas to obtain a second paint dripping angle set, including: Corresponding to the end winding area, the first paint dripping angle is adjusted to: ; or, Corresponding to the chute area, the first paint drop angle is adjusted to: ;or, Corresponding to the notch area, the angle of the first paint drop is adjusted to: ; in, Indicates the angle of the first drop of paint; 、 、 The second paint drop angles of the end winding area, the skew area, and the notch area are represented respectively; represents the inclination angle of the chute; k represents the adjustment coefficient, which is between 0.3 and 0.

5.

3. The motor winding paint dripping control method according to claim 1 or 2, characterized in that: The control method further includes, Adjusting the paint liquid viscosity according to the paint liquid penetration depth distribution, and controlling the paint dripping of the motor winding according to the adjusted paint liquid viscosity; as well as The viscosity-angle correspondence is updated.

4. The motor winding paint dripping control method according to claim 3, characterized in that: The paint viscosity is adjusted when and only when the paint penetration depth of the entire paint dripping winding area is consistent with the target depth deviation trend; wherein the deviation trend includes the paint penetration depth being greater than the target depth or the paint penetration depth being less than the target depth.

5. The motor winding paint dripping control method according to claim 3, characterized in that: Adjusting the viscosity of the paint liquid includes, If the paint penetration depth is greater than the target depth, increase the paint viscosity as follows: ; If the paint penetration depth is less than the target depth, reduce the paint viscosity as follows: ; in, Indicates the adjusted paint viscosity; Indicates the viscosity of the paint being tested; Dt indicates the target depth; and D indicates the measured penetration depth of the paint.

6. The motor winding paint dripping control method according to claim 1, characterized in that: Detecting the paint penetration depth distribution of the paint dripping winding, include, Dividing the paint dripping winding into a plurality of detection areas according to its structure; wherein the plurality of detection areas at least include the end winding area, the skew area and the notch area; Obtaining ultrasonic data sets based on ultrasonic detection corresponding to the multiple detection areas; wherein each ultrasonic data includes echo amplitude, echo arrival time and waveform shape; The ultrasonic data set is analyzed to obtain the paint liquid penetration depth distribution.

7. The motor winding paint dripping control method according to claim 1 or 6, characterized in that: Correcting the second paint drop angle set according to the paint liquid penetration depth distribution includes: If the paint penetration depth is less than the target depth, increase the angle of the second paint drop; If the paint penetration depth is greater than the target depth, reduce the angle of the second paint drop.

8. The motor winding paint dripping control method according to claim 7, characterized in that: Corresponding to the end winding area, correcting the second paint drip angle includes, If the paint penetration depth of the end winding area is less than the target depth, the second paint dripping angle is increased according to the following method: ; If the paint penetration depth of the end winding area is greater than the target depth, the second paint dripping angle is reduced according to the following method: ; in, It represents the corrected second paint drop angle of the end winding area; Dt represents the target depth; and D represents the measured paint penetration depth.

9. The motor winding paint dripping control method according to claim 7, characterized in that: Corresponding to the notch area, correcting the second paint drop angle includes: If the paint penetration depth in the notch area is less than the target depth, increase the second paint drop angle as follows: ; If the paint penetration depth in the notch area is greater than the target depth, the second paint drop angle is reduced as follows: ; in, represents the corrected second paint drop angle in the notch area; Dt represents the target depth; D represents the measured paint penetration depth; Indicates the speed of the winding when paint is dripping.

10. A motor comprising a winding, characterized in that: The winding is painted based on the motor winding paint dripping control method according to any one of claims 1 to 9.

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