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Method of calculating equivalent spans and equivalent numbers of turns for concentric unequal-turn low-harmonic windings

A calculation method and concentric technology, applied in the field of electric motors, can solve problems such as unfavorable enterprises' optimal design, large differences in test data, and labor and material resources, so as to achieve the effect of easy improvement and optimization.

Active Publication Date: 2018-11-13
GUANGDONG LIYUAN ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional method, the calculation of various parameters is carried out through the nominal span, but because low harmonic windings often have unequal turns, and the spans of each coil in the winding are different, the calculated data differs from the actual test data of the finished product It is very large, leading to the fact that the enterprise must make a finished product after each design and then measure the product performance, which is very labor-intensive and not conducive to the optimal design of the enterprise

Method used

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  • Method of calculating equivalent spans and equivalent numbers of turns for concentric unequal-turn low-harmonic windings
  • Method of calculating equivalent spans and equivalent numbers of turns for concentric unequal-turn low-harmonic windings
  • Method of calculating equivalent spans and equivalent numbers of turns for concentric unequal-turn low-harmonic windings

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Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a method for calculating the equivalent span of a concentric unequal-turn low-harmonic winding, which includes the following steps in sequence:

[0036] S1: Obtain the actual span Y of each coil in the winding 1 , Y 2 , Y 3 ...Y n and the actual number of turns N 1 , N 2 , N 3 …N n ;

[0037] S2: Substitute the data obtained from step S1 into the formula used to calculate the equivalent span Y of the winding:

[0038]

[0039] Actual span Y 1 , Y 2 , Y 3 ...Y n and the actual number of turns N 1 , N 2 , N 3 …N n is the span and number of turns of each coil on the actual finished product. The nominal span is the actual span Y 1 , Y 2 , Y 3 ...Y n average of. The nominal number of turns is the actual number of turns N 1 , N 2 , N 3 …N n average of.

[0040] The calculation of traditional methods is for conventional windings, that is, windings with equal turns and equal spans. The calculation of the nominal span is clo...

Embodiment 3

[0061] This embodiment is based on the first embodiment, and is used to determine the actual number of turns N in the first embodiment 1 , N 2 , N 3 …N n .

[0062] Before performing step S1, the following steps in sequence are also included:

[0063] S04: Determine the nominal number of turns z of the winding and the turns ratio of each coil;

[0064] S05: Determine the actual number of turns N of each coil according to the nominal number of turns z of the winding and the turns ratio of each coil 1 , N 2 , N 3 …N n .

[0065] The nominal number of turns z is determined by the user according to actual needs, and the turns ratio z of each coil is selected by the user among the turns ratios that can realize unequal turns and low harmonic windings. Actual number of turns N 1 , N 2 , N 3 …N n It is obtained by multiplying the nominal number of turns z by each coefficient in the turns ratio.

Embodiment 4

[0067] A method for calculating the equivalent number of turns of the concentric unequal-turn low-harmonic winding based on Embodiment 1, comprising the following steps in sequence:

[0068] S1: Obtain the actual span Y of each coil in the winding 1 , Y 2 , Y 3 ...Y n and the actual number of turns N 1 , N 2 , N 3 …N n , and obtain the nominal span y of the winding and the nominal number of turns z of the winding;

[0069] S2: Substitute the data obtained from step S1 into the formula used to calculate the equivalent span Y of the winding:

[0070]

[0071] S3: Substituting the data obtained from S1 and S2 into the formula for calculating the equivalent number of turns Z:

[0072] In the table below, the model is Y 2 Taking the 280S-2 motor as an example, compare the calculation results of calculating the parameters of the motor through the nominal span and the calculation results of calculating the parameters of the motor through the equivalent number of turns. ...

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Abstract

The invention relates to the technical field of motors, in particular to a method of calculating equivalent spans and equivalent numbers of turns for concentric unequal-turn low-harmonic windings. Anequivalent span is calculated through the actual span and actual number of turns of coils in a winding; an equivalent number of turns is calculated through the equivalent span, nominal span and nominal number of turns; therefore, a user can accurately calculate various parameters of a motor through the equivalent span or the equivalent number of turns, and it is convenient for the user to modify and improve motor windings.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a method for calculating the equivalent span and the equivalent number of turns of concentric low-harmonic windings with unequal turns. Background technique [0002] Electric motor enterprises are facing fierce price competition and feel the cost pressure. Therefore, it is necessary to carry out material-saving improvements to reduce costs on the premise of maintaining or improving the quality and efficiency of the original motor. In order to achieve this goal, some companies have begun to adopt low harmonic winding solutions. In order to consider the performance of the finished winding, it is necessary to calculate the no-load current, rated current and other parameters of the winding during design. In the traditional method, the calculation of various parameters is carried out through the nominal span, but because low harmonic windings often have unequal turns, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/00
CPCH02K15/0006
Inventor 丁进平谢广兴杨宏
Owner GUANGDONG LIYUAN ENG TECH CO LTD