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Winding unitized parallel winding structure of alternating current motor stator winding

An AC motor and stator winding technology, applied in the shape/style/structure of the winding conductor, can solve the problems of increasing the length of the wire at the end of the winding, increasing the copper loss of the motor, and increasing the resistance of the winding, so as to improve the motor efficiency, The effect of saving materials and reducing winding resistance

Inactive Publication Date: 2015-03-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Integer-slot winding or fractional-slot winding structure with neutral point independent phase branch parallel star connection often increases the length of the wire at the end of the winding due to the large number of windings spanning the slots, resulting in an increase in the winding resistance and increasing the motor capacity. Copper consumption

Method used

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  • Winding unitized parallel winding structure of alternating current motor stator winding
  • Winding unitized parallel winding structure of alternating current motor stator winding
  • Winding unitized parallel winding structure of alternating current motor stator winding

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Embodiment Construction

[0022] The present invention will be further elaborated below through specific embodiments.

[0023] The AC motor stator winding unitized parallel winding structure of the present invention, the structure of the AC motor stator adopts a centralized winding structure and a star connection structure in which each phase winding branch is independent of each other and each phase winding branch is connected in parallel; specifically: multi-stage multi- The number of phases of a phase AC motor is m, the number of stator slots is Z, the number of pole pairs is p, and Z can divide m; the stator slots are divided into Z / m units, each unit contains m teeth, and m teeth A parallel branch of m phases is respectively wound, and the tail ends of the parallel branches wound by m teeth on each unit are connected to form a neutral point of a star connection, and the Z / m units form a Z / m An independent unconnected neutral point; and the first ends of each phase winding of each unit are respecti...

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Abstract

The invention provides a winding unitized parallel winding structure of an alternating current motor stator. The alternating current motor stator adopts a concentrated winding structure to be connected with a phase winding branch, with independent neutral points, in parallel in a star connection mode; the number of phases of an alternating current motor is m; the number of stator slots is Z; the number of pole-pairs is P; Z can evenly divide m; the stator slots of the alternating current motor are divided into Z / m units; in each unit, a parallel branch of a corresponding phase is wound on each tooth; tail ends of the parallel branches on each the unit are connected with one another, so as to form a neutral point of star connection; the Z / m units form Z / m independent disconnected neutral points. The winding unitized parallel winding structure reduces the length of a connecting lead at the end part of the motor, reduces copper use level and copper consumption, improves the motor efficiency, power density and slot utilization, and simplifies the winding technology; in addition, the fluctuation of cogging torque is correspondingly restrained, and the counter electromotive force sine of windings is improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a unitized parallel winding structure of an AC motor stator winding, which is suitable for the stator windings of AC motors such as induction motors, permanent magnet motors, and linear motors. Background technique [0002] Concentrated windings are widely used in AC motors. With the advantages of small winding end size, high motor power density, simple winding process and easy automatic winding, etc., it has become the first choice for motor design. For the connection mode of the stator winding of the AC motor, star connection and closed connection are common: the star connection is to connect the tails of each phase winding together (called the neutral point), and then lead out the head of each phase winding; The closed connection is to connect the tail of one phase winding to the head of the next phase winding, connect all windings head to tail to form a closed loop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
CPCH02K3/28
Inventor 林明耀徐磊李红艳
Owner SOUTHEAST UNIV
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