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Commutator overspeed performance simulation calculation method

A technology of simulation calculation and commutator, which is applied in calculation, design optimization/simulation, instruments, etc., to achieve the effects of shortening the development cycle, strong observability, and fast speed

Active Publication Date: 2017-03-29
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional product development model can no longer meet the current needs of high-speed and effective product development

Method used

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  • Commutator overspeed performance simulation calculation method
  • Commutator overspeed performance simulation calculation method
  • Commutator overspeed performance simulation calculation method

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Embodiment Construction

[0037] In order to better understand the present invention, the present invention will be further described below in conjunction with the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] This embodiment is a simulation calculation method for the overspeed performance of the commutator, aiming at simulating the overspeed damage process of the commutator through finite element software, estimating the overspeed fracture speed of the commutator, and optimizing the design of the commutator. as attached figure 1 As shown, the commutator is composed of a bushing 1, a reinforcement ring 2, a commutator segment 3, and a molding compound 4. During the working process of the commutator, the commutator as a whole bears the centrifugal force and thermal stress, and the commutator segment acts as a The role of conducting current and commutation, the molding compound plays the role of insulation and supporting the commutator ...

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Abstract

The invention provides a commutator overspeed performance simulation calculation method. According to the method, fracture mechanics is introduced in an extended finite element method, so that a commutator overspeed fracture process is simulated in finite element software. The method comprises the steps of performing a fracture mechanics test on a commutator material, obtaining fracture performance parameters, introducing fracture mechanics parameters in finite element analysis through a bilinear stress softening curve model, building a finite element model by utilizing Abaqus finite element software to simulate a commutator overspeed fracture destruction process and the like. The method adopts finite element simulation analysis and has the advantages of high speed, low cost, good observability and the like; the material fracture parameters are obtained through the fracture test and applied to the finite element analysis, so that the commutator overspeed destruction process is simulated; and stress field changes of all parts in the commutator overspeed destruction process can be obtained in a development stage, and theoretical estimation is finished before trial production of a product, so that repeated sample trial production processes are avoided, the development cost is reduced, and the development cycle is shortened.

Description

technical field [0001] The invention relates to a method for simulating and calculating the overspeed performance of a commutator, in particular to a simulating calculation for the process of breaking and flying when the commutator of a motor is subjected to an overspeed centrifugal force. Background technique [0002] The commutator is one of the key components of the DC motor, which directly affects the life and performance of the motor. During the working process of the motor, the commutator not only conducts current and performs commutation, but also rotates at a high speed under a certain temperature condition, and bears the effects of centrifugal force and thermal stress. Especially when the motor is unloaded and the speed reaches the maximum, the commutator is subjected to a huge centrifugal force, and the molding compound that fixes the copper sheet may produce microcracks, and then the cracks will expand, eventually causing the accident that the copper sheet will fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 周冲上官文斌
Owner SOUTH CHINA UNIV OF TECH
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