Double-layer lap winding winding structure for single-winding double-speed motor of nuclear power system

Abstract

The invention relates to a double-layer laminated winding winding structure of a single-winding double-speed motor for a nuclear power system. A stator adopts a 48-slot double-layer laminated windingstructure, stator slots are sequentially defined as a first slot to a 48th slot by taking any stator slot as a starting point, and a lower-layer wire outlet end of the first slot is defined as a 2U end; an upper-layer wire outlet end of the 47th groove is defined as a U2 end; a lower-layer outgoing line port of the 13th groove is defined as a 1U end, and an upper-layer outgoing line end of the 35th groove is defined as an X2 end; and the lower-layer wire outlet end of the ninth groove is defined as a 2V end. By adjusting the winding joints and changing the winding connection mode, the motor can achieve two different rotating speeds in one winding arrangement mode, and the use requirements of equipment are met. According to the invention, the circulation loss caused by the mutual influencebetween different windings of the double-winding multi-speed motor can be eliminated; compared with variable-frequency speed regulation, harmonic pollution to a power grid is avoided, and the power quality and the operation reliability of the power grid are improved.

Description

technical field [0001] The invention relates to a double-layer stacked winding winding structure of a single-winding double-speed motor used in a nuclear power system. Background technique [0002] Due to the technical characteristics of small size, no leakage, and high safety level, the use of shielded motors in nuclear power plants is increasing year by year, and has broad market prospects. The motor usually adopts two methods of variable pole multi-speed motor or frequency conversion speed regulation to meet the requirements of the host for different speeds, but these two speed regulation methods have certain limitations. The characteristics of these two speed regulation methods are analyzed below: [0003] 1) Frequency conversion speed regulation: When the motor is regulated by a frequency converter, it has great advantages in speed regulation range, dynamic response, and speed regulation accuracy, but the frequency converter needs to occupy a large space, and at the sam...

AI Technical Summary

Problems solved by technology

Pole-changing motor windings are divided into double-winding and single-winding. The double winding is a relatively independent winding, which is convenient to design, but the material utilization rate is poor, which is not conducive to the miniaturization of the motor.

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