Stator double-armature lap winding unit of three-phase brushless synchronous generator

Abstract

A stator double-armature lap winding unit of a three-phase brushless synchronous generator is characterized in that the number of stator grooves is 36, the number of poles is four, and the stator armature winding unit is composed of two sets of three-phase symmetrical lap windings. The windings of each phase are formed by serially connecting a first group of windings in the first set and a first group of windings in the second set and serially connecting a second group of windings in the first set and a second group of windings in the second set, and the corresponding phases of the first set of windings and the second set of windings are identical. Therefore, the parallel branch number of the windings of each phase can be 1 or 2, and the three-phase symmetrical windings formed by the two sets of windings can be triangle-shaped, Y-shaped, or X-shaped. Thus, three-phase alternating-current power supplies of different voltage grades can be provided. Harmonic waves of an order of 3 or orders of odd times of 3 are eliminated from phase voltage of the double-armature lap winding unit, and harmonic waves of orders of 5, 7... or higher orders are also greatly weakened. According to actual measurements, line and phase voltage waveform distortion rates of a 30 kW 4-pole sample machine under zero load and full load conditions are always under 2%. The performance of driving electronic equipment loads and induction motors is obviously improved. Moreover, the stator double-armature lap winding unit is traditional in technology, easy in implementation, and convenient for popularization.

Description

technical field [0001] The invention relates to a motor winding, in particular to a three-phase brushless synchronous generator stator double-armature stacked winding. Background technique [0002] As we all know, in order to flexibly change the power supply voltage level and improve the ability to carry electronic loads in modern three-phase brushless synchronous generators, distributed short-distance windings with a pitch of 2 / 3 are widely used in the stator three-phase armature windings. However, although the 2 / 3 pitch winding can eliminate the 3rd and 3rd odd multiple voltage harmonics, the 5th and 7th harmonics have high content, which reduces the ability of induction motors and precision electronic loads. This is A significant flaw exists with 2 / 3 pitch windings. Therefore, how to retain the advantages of 2 / 3 pitch windings and overcome its major defects is the focus of current research on armature windings. Contents of the invention [0003] The purpose of the pre...

AI Technical Summary

Problems solved by technology

However, although the 2 / 3 pitch winding can eliminate the 3rd and 3rd odd multiple voltage harmonics, the 5th and 7th harmonics have high content, which reduces the ability of induction motors and precision electronic loads. This is A major flaw in 2 / 3 pitch windings

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