Winding unitized parallel winding structure of alternating current motor stator winding

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...

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

Images