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Fractional slot winding wiring method, winding and motor

A wiring method and fractional slot technology, applied to the shape/style/structure of winding conductors, can solve the problems of increasing the difficulty of manufacturing and installation, and achieve the effect of reducing the difficulty of manufacturing and installation

Active Publication Date: 2018-12-04
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For unconventional wiring of fractional slot windings, unequal-pitch coil connection methods are often used. However, the unequal-pitch coil connection method will make the upper and lower ends of the fractional slot windings have jumpers, which increases the difficulty of manufacturing and installation.

Method used

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  • Fractional slot winding wiring method, winding and motor
  • Fractional slot winding wiring method, winding and motor
  • Fractional slot winding wiring method, winding and motor

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Embodiment Construction

[0067] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0068] For fractional-slot motors with an odd number of pole pairs, unequal-pitch coil connections are often used for unconventional wiring of the fractional-slot windings. Wiring increases the difficulty of manufacturing and installation. The embodiment of the present invention provides a method for wiring fractional slot windings. By connecting all the coils of the stator winding with the same pitch, the wiring of unconventional windings with equidistant fra...

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Abstract

The invention provides a fractional slot winding wiring method, a winding and a motor. In the wiring method, by connecting all coils of a stator winding with the same pitch, non-conventional winding wiring of equidistant fractional slots can be realized, and the stator coils have the same pitch; in the case of branch division, through building a branch division array, the branch division array issubjected to certain transformation in view of a different phase belt; the branch division array is then used to carry out branch division on the stator coils in each phase belt, wiring can be required according to the unbalance of induced electromotive force between branches, and thus, the wiring laws of three phases of windings are made to be consistent, and the induced electromotive force unbalance of the branch is the same.

Description

technical field [0001] The invention relates to the field of connection of motor windings, in particular to an unconventional connection method for fractional slot windings, a winding and a motor. Background technique [0002] If the slot current of the generator is too small, it indicates that the effective material utilization of the generator is poor and uneconomical. In engineering applications, windings often use unconventional wiring methods to obtain suitable slot currents. For example, for a 300MW class 14-pole pumped storage generator motor, if 7 branches of conventional windings are used, the tank current is low. By reducing the number of parallel branches, such as using 4 branches of unconventional winding connections, the tank current can be increased. Unconventional wiring is connected into balanced branch and unbalanced branch according to the situation. The induced potentials of the parallel branches are equal in size and phase, which is called a balanced br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
Inventor 卢伟甫樊玉林王勇桂中华郑雪琴孙晓霞杜雅楠孙慧芳李佳霖于姗曹佳丽陈瑞兰柏潘凌董阳伟
Owner STATE GRID CORP OF CHINA