CN-121997537-A - Method, device and storage medium for determining parameters of enameled wire

CN121997537ACN 121997537 ACN121997537 ACN 121997537ACN-121997537-A

Abstract

The invention discloses a parameter determination method and device for enameled wires and a storage medium. The method for determining parameters of the enameled wire comprises the steps of obtaining corona resistance time, paint film thickness and paint ratio of a plurality of groups of enameled wires, constructing a fitting equation model of a relation curve of logarithmic value, paint film thickness and paint ratio of the corona resistance time, carrying out fitting analysis on each group of logarithmic value, paint film thickness and paint ratio of the corona resistance time, determining a constant value of the fitting equation model, and obtaining parameters of the corresponding enameled wire based on corona resistance time requirements of users and the fitting equation model when the parameters of the enameled wire are required to be determined. And through statistical modeling of corona resistance test data of a plurality of groups of enameled wire samples, a functional relation between corona resistance time, paint film thickness and surface paint proportion is obtained, so that parameters of enameled wires can be accurately and rapidly determined.

Inventors

YAO RONGWEN
Xiong Luliang
ZHANG LIYAN
MA HONGJIE
WANG RONGZHI
XIONG BIN

Assignees

珠海格力电工有限公司
格力电工（马鞍山）有限公司
格力电工（眉山）有限公司
格力电工(南京)有限公司

Dates

Publication Date: 20260508
Application Date: 20251216

Claims (8)

1. A method for determining parameters of an enamel wire, comprising: Obtaining corona resistance time, paint film thickness and surface paint proportion of a plurality of groups of enamelled wires; Constructing a fitting equation model of a corona-resistant time logarithmic value, paint film thickness and surface paint proportional relation curve; carrying out fitting analysis on the corona resistant time logarithmic value of each group and the paint film thickness and surface paint proportion, and determining a constant value of a fitting equation model; And when the parameters of the enameled wire need to be determined, obtaining the parameters of the corresponding enameled wire based on the corona-resistant time requirement of the user and the fitting equation model.
2. The method for determining parameters of an enamel wire according to claim 1, wherein the fitting equation model is: ; wherein A, B, D is a constant, T is corona resistant time, H is paint film thickness, P is surface paint proportion, and e is a natural logarithmic base number or any positive integer.
3. The method of determining parameters of an enamel wire according to claim 2, wherein the fitting analysis of the corona resistant time log values with the paint film thickness and the paint ratio of each group, determining constant values of the fitted equation model comprises: Importing n groups of data sets { Hn, pn, tn } into a fitting equation model, and taking the logarithm taking e as a base at the same time on two sides of the equation to obtain the following components: ; calculating to obtain a plurality of groups of data { Hn, pn, tn, \ln (Tn) }, wherein Hn is the thickness of a paint film of the nth group, pn is the surface paint proportion of the nth group, and Tn is the corona resistant time of the nth group; Fitting analysis is performed on the data sets { Hn, pn, tn, \ln (Tn) } using fitting analysis software to determine a constant value A, B, D.
4. The method of determining parameters of an enamel wire according to claim 3, wherein obtaining parameters of a corresponding enamel wire based on a corona resistant time requirement of a user and the fitting equation model comprises: acquiring a minimum corona resistant time required value T Client and method for providing a customer with a service of a user; obtaining the fitting equation model, and establishing a comparison relation: ; The surface paint proportion and the paint film thickness are adjusted to obtain the value combination of the surface paint proportion and the paint film thickness which can meet the comparison relation, and the value combination corresponding to the minimum paint film thickness or the surface paint proportion which saves the cost is obtained from the value combination to meet the requirements of users.
5. The method for determining parameters of an enamel wire according to claim 3, wherein the fitting analysis software is Minitab software or Origin software.
6. The method for determining parameters of an enamel wire according to claim 1, wherein the obtaining corona resistant time, film thickness and surface paint ratio of the plurality of groups of enamel wires comprises: enameled wire samples with different paint film thicknesses H and different surface paint ratios are selected; testing corona resistance time of each sample for multiple times under the same condition by using a corona resistance tester; And arranging the corona resistant times of the test samples according to the sequence of the sizes, taking the intermediate value as the corona resistant time T of the corresponding test sample, and obtaining the paint film thickness and corona resistant time data sets { Hn, pn, tn } of n groups of enameled wires.
7. A parameter determining device for enameled wire, comprising a memory and a processor, wherein the processor executes the parameter determining method for enameled wire according to any one of claims 1-6 by calling a control program stored in the memory.
8. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed on a computer, causes the computer to carry out the method for determining parameters of an enamelled wire according to any one of claims 1 to 6.

Description

Method, device and storage medium for determining parameters of enameled wire Technical Field The invention relates to the technical field of electromagnetic wire insulation performance evaluation and design, in particular to a curve fitting method for corona resistance time, paint film thickness and surface paint proportion relation. Background With the wide application of variable frequency motor, electric vehicle driving motor and high voltage power supply, the motor winding works under the working condition of high voltage, high frequency and steep voltage rising edge for a long time, the winding insulation is easy to be partially discharged and continuously eroded by corona, and further insulation aging and even breakdown failure are caused. The enameled wire is used as a key component for winding insulation, and the corona resistance of the enameled wire directly influences the reliability and service life of the whole machine. In the prior art, in order to meet the requirements of different customers on corona resistance time, the thickness of a paint film and the proportion of surface paint are generally adjusted by adopting an empirical design or a mode of a large number of test samples and repeated tests. On one hand, the relation between the paint film thickness, the surface paint proportion and the corona-resistant time is difficult to quantify through empirical design, the design margin is often larger, the material waste and the production cost are increased, on the other hand, the cycle is long by means of trial production and test repeated iteration, the test cost is high, and the unified quantitative design basis is lacking, so that the quick development and popularization of corona-resistant enameled wire products with different specifications and different varieties are not facilitated. Therefore, a method capable of determining corresponding parameters of the enameled wire based on the existing test data is needed, so that the material and production cost are reduced on the premise of ensuring the performance, and the accuracy and efficiency of product design are improved. Disclosure of Invention The invention provides a method and a device for determining parameters of an enameled wire and a storage medium for solving the technical problems that in the prior art, empirical design or repeated test is adopted when the parameters of the enameled wire are determined. The method for determining the parameters of the enameled wire provided by the invention comprises the following steps: Obtaining corona resistance time, paint film thickness and surface paint proportion of a plurality of groups of enamelled wires; Constructing a fitting equation model of a corona-resistant time logarithmic value, paint film thickness and surface paint proportional relation curve; carrying out fitting analysis on the corona resistant time logarithmic value of each group and the paint film thickness and surface paint proportion, and determining a constant value of a fitting equation model; And when the parameters of the enameled wire need to be determined, obtaining the parameters of the corresponding enameled wire based on the corona-resistant time requirement of the user and the fitting equation model. Further, the fit equation model is: wherein A, B, D is a constant, T is corona resistant time, H is paint film thickness, P is surface paint proportion, and e is a natural logarithmic base number or any positive integer. Further, the fitting analysis is carried out on the corona resistant time logarithmic value of each group and the paint film thickness and the surface paint proportion, and the determining of the constant value of the fitting equation model comprises the following steps: Importing n groups of data sets { Hn, pn, tn } into a fitting equation model, and taking the logarithm taking e as a base at the same time on two sides of the equation to obtain the following components: calculating to obtain a plurality of groups of data { Hn, pn, tn, \ln (Tn) }, wherein Hn is the thickness of a paint film of the nth group, pn is the surface paint proportion of the nth group, and Tn is the corona resistant time of the nth group; Fitting analysis is performed on the data sets { Hn, pn, tn, \ln (Tn) } using fitting analysis software to determine a constant value A, B, D. Further, based on the corona resistant time requirement of the user and the fitting equation model, obtaining parameters of the corresponding enameled wire includes: acquiring a minimum corona resistant time required value T Client and method for providing a customer with a service of a user; obtaining the fitting equation model, and establishing a comparison relation: The surface paint proportion and the paint film thickness are adjusted to obtain the value combination of the surface paint proportion and the paint film thickness which can meet the comparison relation, and the value combination corresponding to the minimum paint film thickness