Simulation method for researching influence of environment temperature on novel overload protection relay temperature

A technology for overload protection and ambient temperature, applied in instruments, simulators, control/regulation systems, etc.

Inactive Publication Date: 2018-05-29
株洲市智汇知识产权运营服务有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the current amplitude as the basis for fault judgment, this method can only protect symmetrical faults

Method used

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  • Simulation method for researching influence of environment temperature on novel overload protection relay temperature
  • Simulation method for researching influence of environment temperature on novel overload protection relay temperature

Examples

Experimental program
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Embodiment

[0026] Such as figure 1 As shown, a simulation method for studying the influence of ambient temperature on the temperature of a new type of overload protection relay is provided, including the following steps:

[0027] S1: Construct the structure of a new type of overload protection relay heating assembly. The heating assembly includes a housing, wiring terminals and heating elements. The wiring terminals of the metal material are on both sides of the housing. The connecting terminal is connected; the material of the heating element is nickel-chromium alloy; the material of the connecting terminal is copper; the material of the shell is phenolic resin.

[0028] S2: Based on ANSYS finite element software, the three-dimensional geometric model of the heating component is established by means of solid modeling, and then the material physical parameters, element type determination and mesh division are performed on the three-dimensional geometric model of the heating component; th...

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Abstract

The invention belongs to the thermal overload protection field of a motor and especially relates to a simulation method for researching an influence of an environment temperature on a novel overload protection relay temperature. The method comprises the following steps of S1, constructing the structure of a novel overload protection relay heating component; S2, based on ANSYS finite element software, using a solid modeling mode to establish a heating-component three-dimensional geometric model, and then carrying out material physical parameter determination, unit type determination and grid division on the heating-component three-dimensional geometric model; S3, carrying out heat production analysis on a terminal and a heating component, wherein heat component heating satisfies the following formula: P=I<2>R, and the heat generation rate of a heat component satisfies the following formula: Q1=P/V; S4, carrying out heat dissipation analysis on the terminal and the heating component, wherein a convection heat dissipation coefficient formula is acon=3.25(T0-TF)<0.25>; S5, determining the boundary condition of temperature field simulation calculating and load applying; S6, calculatingthe stable state temperature field of the heating component under a normal condition; and S7, changing the initial temperature condition of simulation and simulating the temperatures of the heating component in different environments.

Description

technical field [0001] The invention belongs to the field of thermal overload protection of motors, and in particular relates to a simulation method for studying the influence of ambient temperature on the temperature of a novel overload protection relay. Background technique [0002] During the operation of the motor, if it is overloaded, its speed will drop, and the current in the motor winding will increase accordingly, which will further cause the temperature of the motor to rise, which will not only cause the motor to fail, but also easily cause the insulation of the motor to age and reduce service life. The thermal overload protection relay is a low-voltage overload protection relay suitable for motors. Its main purpose is to limit the temperature rise of the motor and distribution lines within the allowable range, ensure its insulation performance, and increase its service life. [0003] Traditional overload protection relays include thermal overload protection relay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 胡维维
Owner 株洲市智汇知识产权运营服务有限责任公司
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