Five-phase induction motor winding design with star pentagon winding connection mode

A winding connection and induction motor technology, which is applied in the shape/style/structure of the winding conductor to reduce the core loss and vibration noise, improve the winding factor, and be easy to implement.

Active Publication Date: 2021-06-25
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the induction motor has been developed, applied and improved for many years, and the manufacturing process technology is relatively mature, there are still some technical problems to be solved urgently, especially for motors used in some occasions with high performance requirements.

Method used

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  • Five-phase induction motor winding design with star pentagon winding connection mode
  • Five-phase induction motor winding design with star pentagon winding connection mode
  • Five-phase induction motor winding design with star pentagon winding connection mode

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 The schematic diagram of the motor winding shown is for illustration. The five-phase induction motor is a single-layer winding with 40 slots; the star pentagonal winding is designed as an external pentagonal internal star winding. Two parts of the winding, and then connect the five lead-out wires of the star-shaped partial winding to the five corresponding vertices of the pentagonal partial winding, and then connect the five lead-out wires of the pentagonal partial winding to the five-phase power supply.

specific Embodiment approach 2

[0025] Specific implementation mode two: combination figure 2 The electrical angle distribution diagram of the motor is shown for illustration. The pitch of this star pentagonal winding coil is 10, and the whole pitch; by dividing each phase belt of the ordinary star winding into two parts: pentagonal and star-shaped , that is, the number of slots occupied by each phase winding under each pole is divided into two equal parts, and the pentagonal and star-shaped windings are arranged alternately. , and there is an electrical angle difference of 18° between the pentagon and the star.

specific Embodiment approach 3

[0026] Specific implementation method three: the star part of the winding is composed of five branches A1, B1, C1, D1, and E1, and the five branches are separated by an electrical angle of 72°; the first and last ends of A1 are respectively marked as a1 and a2; The first and last ends of C1 are respectively marked as c1 and c2; the first and last ends of D1 are respectively marked as d1 and d2; the first and last ends of E1 are respectively marked as e1 and e2.

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Abstract

The invention discloses a five-phase induction motor winding design with a star pentagon winding connection mode, which belongs to the technical field of motors. The star pentagon winding is a winding with a pentagonal outer part and a star-shaped inner part, the pentagonal winding and the star-shaped winding are respectively wound, then five outgoing lines of the star-shaped winding are connected to five corresponding vertexes of the pentagonal winding, and then the five outgoing lines of the pentagonal winding are connected to a five-phase power supply. The winding axes of all phases are spaced by 72 degrees in the pentagonal part and the star-shaped part respectively, and the difference between the pentagonal part and the star-shaped part is 18 degrees. The star-shaped part of the winding is composed of five branches A1, B1, C1, D1 and E1, and the pentagonal part is composed of five branches A2, B2, C2, D2 and E2. The star pentagon winding connection mode of the five-phase induction motor improves the winding factor and improves the motor performance. The motor iron core loss and the vibration noise are reduced. The inner part of the five-phase induction motor is actually 20 phases, the harmonic frequency is weakened, and only 19, 21 and other harmonic waves exist in the fundamental wave magnetomotive force.

Description

technical field [0001] The invention mainly relates to the technical field of electric motors, in particular to the winding design of a five-phase induction motor whose winding connection mode is a star pentagon. Background technique [0002] For the research of multi-phase induction motor, compared with the traditional three-phase induction motor, the advantages of multi-phase induction motor are mainly reflected in the following points: multi-phase speed control system has better mining value and more considerable control resources, can Use some special control modes; the cooperation of low-voltage power devices can bring more power. Under the same motor capacity and the same phase current state, the increase in the number of phases of the motor can reduce the power supply voltage of the motor. To a certain extent, the dynamic voltage equalization problem caused by the series connection of power devices is avoided; the amplitude of the pulse torque of the motor is reduced,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
CPCH02K3/28Y02T10/64
Inventor 夏云彦赵玉明
Owner HARBIN UNIV OF SCI & TECH
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