Connecting method of non-60-degree phase belt symmetric windings

A connection method and a symmetrical winding technology, applied in the shape/style/structure of the winding conductor, can solve the problems of weakening harmonics, capacity, speed and voltage mismatch, and achieve improved voltage waveforms, superior performance indicators, and reduced phase. Effects with distribution coefficients

Active Publication Date: 2014-12-03
DONGFANG ELECTRIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and provide a connection method of a non-60° phase-band symmetrical winding. The present invention can solve the problem of capacity, rotational speed and voltage mismatch, and achieve weakening of harmonics and improvement of voltage The purpose of the waveform

Method used

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  • Connecting method of non-60-degree phase belt symmetric windings
  • Connecting method of non-60-degree phase belt symmetric windings
  • Connecting method of non-60-degree phase belt symmetric windings

Examples

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Effect test

Embodiment 1

[0025] A non-60° phase connection method with symmetrical windings, the following conditions are set:

[0026] 1) When the number of slots per pole and phase of the stator winding q is an integer, is an odd number greater than 1, where a is the number of parallel branches of the stator winding, and a is an even number greater than 2;

[0027] 2) When the number of slots per pole and phase of the stator winding q is a fraction, express q in the form of an false fraction, and its numerator is an even number, and , where d is the denominator of q, a is the number of parallel branches of the stator winding, and a is an even number greater than 2;

[0028] On the basis of the above conditions, the specific wiring method is as follows: Draw the potential vectors of the upper and lower layer bars of the stator winding in the star diagram, and divide the potential vectors in the star diagram into A, Z, B, X, C , Y six phase belts, according to the method of increasing the distribu...

Embodiment 2

[0036] Such as image 3 Shown is a non-60° phase belt four-branch symmetrical double-layer winding phase belt and branch division schematic diagram, in the figure "О" stands for A and X phase belts, "×" stands for B and Y phase belts, "Δ" stands for C and Z phase belt; the winding is composed of six phase belts of A, Z, B, X, C, and Y, the number of pole pairs p is 7, the number of slots z is 252, and the number of slots per pole and phase q is 6, which is an integer , the branch number a is 4, , is an odd number greater than 1; the star diagram contains the potential vectors of the upper and lower layer bars, from the inside to the outside, a total of 2p=14 layers, each phase and each branch contains Layer, a total of 42 potential vectors, each phase and each branch contains The number of layers of a potential vector is a positive odd number less than 7, choose 3, and the number of potential vectors contained in another 2 layers is less than 6, choose 2, and the number o...

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Abstract

The invention discloses a slot number selection, phase belt division and winding connection method of non-60-degree phase belt symmetric double-layer stator windings. According to the method, the pole number, the branch number, the relation between the slot number of each phase and each pole, the phase belt division and the specific requirement, it is pointed that the non-60-degree phase belt symmetric double-layer stator windings can be wave windings or lap windings, and can be integral-slot windings or fractional-slot windings, and the windings must be connected in a whole-distance mode. The problem that the capacity, the rotating speed and voltage are mismatched can be solved, and the aims that the harmonic wave is weakened, and the voltage waveform is improved can be achieved.

Description

technical field [0001] The invention relates to a connection method of a three-phase double-layer symmetrical winding, in particular to a connection method of a three-phase double-layer non-60° phase belt symmetrical winding. Background technique [0002] The speed of hydroelectric generators and pumped storage generator motors is limited by hydraulic parameters, and the selection of the number of motor stator winding branches must meet the symmetry conditions. [0003] In the prior art, usually the wiring of the three-phase double-layer winding can first calculate the unit motor and the number of winding cycles, and draw a star diagram, and then divide the potential vector of the star diagram into six phase bands. Among them, the six phase belts are respectively represented by A, Z, B, X, C, and Y in sequence, and the potential vector distribution angle of each phase belt is 60°. The method of adding is synthesized into a potential vector, A-phase band combined vector and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
Inventor 郑小康邹应冬钱昌燕钱生坤骆林罗永刚李建富
Owner DONGFANG ELECTRIC MACHINERY
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