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Five-phase motor adopting pentagonal winding connection mode

A winding connection and pentagonal technology, applied in the field of five-phase motors, can solve the problems of power system and electrical equipment normal operation hazards, can not be studied, etc., to achieve the effect of optimizing motor performance, suppressing vibration, and reducing harmonic components

Pending Publication Date: 2020-12-29
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Under the power supply of the frequency converter, the motor is usually powered by a non-sinusoidal wave, so the traditional sine-wave power supply cannot be used for research
In addition, as more and more harmonic sources are applied to the power system, the voltage waveform distortion rate in the power grid will also increase, which will cause harm to the normal operation of the power system and electrical equipment

Method used

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  • Five-phase motor adopting pentagonal winding connection mode

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Embodiment Construction

[0017] Such as figure 1 As shown, a five-phase motor with pentagonal winding connection, the number of phases is five phases a, b, c, d, e, and Na, Nb, Nc, Nd, Ne respectively represent the five phases a, b, c, For the windings of d and e, the pentagonal winding connects the windings in half of the slots of the motor to form a pentagon according to the number of phases of the power supply, and connects the tail terminals of the windings in the other half of the slots to the interphase connection points of the five-sided windings to form a star , forming a hybrid connection winding. The number of turns of the pentagonal winding is 2sin36° times that of the star winding. The cross-sectional area of ​​the winding conductor is used in inverse proportion.

[0018] The present invention is a 20-phase motor when viewed from the inside of the motor, and a five-phase motor when viewed from the outside of the motor. The connection according to this method can eliminate harmonic compon...

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Abstract

The invention discloses a five-phase motor adopting a pentagonal winding connection mode, which is a 4m-phase motor seen from the inside of the motor and an m-phase motor seen from the outside of themotor, and the motor can greatly reduce harmonic components, not only can inhibit vibration, noise, harmonic torque and stray loss, but also can save engineering cost, and has practical engineering application value. According to the invention, fundamental current and harmonic current can be simultaneously introduced, and after the harmonic current is injected, the ferromagnetic saturation of themotor is reduced, and the torque density of the motor can be correspondingly improved.

Description

technical field [0001] The invention relates to the field of motors, in particular to a five-phase motor with a pentagonal winding connection mode. Background technique [0002] As a kind of motor, the induction motor has stable working performance, excellent mechanical performance, relatively simple and lean structure, and is widely used. The design should be relatively stable and will not change much. However, with the rapid development of modern control drive technology, and the ever-changing power electronic devices with outstanding performance, and, for motors driven by variable frequency, the number of motor phases is no longer the constraint of traditional motors, and the number of motor phases has become a variable. According to the working scenarios and needs, various designs have been developed, which provides the possibility for more precise and complex control of the motor. Often in large-scale ship propulsion, nuclear reactor water supply system, aerospace engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
CPCH02K3/28H02K2213/03
Inventor 曹泽伦孟大伟
Owner HARBIN UNIV OF SCI & TECH
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