Method for evaluating health status of switching power supply based on least square fitting

A switching power supply and least squares technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of poor reliability of evaluation results and difficulty in data acquisition.

Inactive Publication Date: 2014-04-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of difficult data collection and poor reliability of evaluation results in the existing evaluation m

Method used

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  • Method for evaluating health status of switching power supply based on least square fitting
  • Method for evaluating health status of switching power supply based on least square fitting
  • Method for evaluating health status of switching power supply based on least square fitting

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specific Embodiment approach 1

[0051] Specific implementation mode one: the following combination figure 1 and figure 2 Illustrate this embodiment, the method for evaluating the state of health of a switching power supply based on least squares fitting described in this embodiment, it includes the following steps:

[0052] Step 1: Establish a switching power supply simulation model, and determine the key stress factors affecting the output characteristics of the switching power supply and the fluctuation range of the key stress factors according to the switching power supply simulation model and the expected environmental conditions and usage conditions of the switching power supply;

[0053] Step 2: According to the key stress factors affecting the output characteristics of the switching power supply, determine the key components of the switching power supply, and establish the degradation model of each key component;

[0054] Step 3: By modifying the parameters, perform quantitative degradation injectio...

specific Embodiment approach 2

[0060] Specific implementation mode two: the following combination image 3 This embodiment will be described. This embodiment will further describe Embodiment 1. The switching power supply described in this embodiment is a switching power supply for driving LED street lamps.

[0061] image 3 The specific circuit schematic diagram of switching power supply for LED street lamps.

specific Embodiment approach 3

[0062] Specific implementation mode three: the following combination Figure 1 to Figure 3 Describe this embodiment, this embodiment will further explain the second embodiment, the specific steps of the switching power supply in this embodiment are LED street lamp driving switching power supply are as follows:

[0063] The first step is: establish a Pspice simulation model according to the working principle of the LED street lamp driving switching power supply, determine that the ambient temperature, input voltage and load are the key stress factors, the ambient temperature fluctuation range is -20°C to 60°C, and the input voltage fluctuation range is 400°C ±20V; load fluctuation range is 165Ω to 245Ω;

[0064] The second step is: determine the aluminum electrolytic capacitor C1, the transformer T1, the first feedback resistor R1, the second feedback resistor R2 and the metal oxide semiconductor field effect transistor Q1 as key components, and the degradation models of each k...

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Abstract

The invention relates to a method for evaluating health status of a switching power supply based on least square fitting, belonging to the technical field of evaluation of the health status of the switching power supplies, and aiming at solving the problems that an existing method for evaluating the health status of a switching power supply is difficult for data acquisition and bad for evaluation result reliability. The method disclosed by the invention comprises the steps: firstly establishing a switching power supply simulation model, determining the key stress factor influencing the output characteristic of the switching power supply and the fluctuation range of the key stress factor; then determining key components of the switching power supply, and establishing a degradation model of each key component; sequentially carrying out quantitative degradation injection on the degradation models of the key components; then constructing an output characteristic parameter degradation model of the switching power supply; and acquiring the key stress factor values and the output characteristic parameter value of the switching power supply, thus obtaining the health status evaluation result of the switching power supply according to the output characteristic parameter degradation model of the switching power supply. The method disclosed by the invention is used for evaluating the health status of the switching power supply.

Description

technical field [0001] The invention relates to a method for evaluating the health state of a switching power supply based on least square fitting, and belongs to the technical field of health state evaluation of a switching power supply. Background technique [0002] With the rapid development of modern science and technology industry, as well as the proposal and gradual realization of the concept of all-electricity, the power consumption of the system has increased significantly, and higher requirements have been placed on the performance and reliability of the power supply system of electronic equipment. Traditional methods of regular maintenance are costly but fail to significantly improve reliability. Therefore, it is necessary to introduce the idea of ​​state-based intelligent maintenance into the field of power supply. To realize the idea of ​​intelligent maintenance, it is first necessary to accurately obtain the health status of the power supply. [0003] The stat...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 叶雪荣陈岑王一行翟国富宛然赵薇孟彦辰孙博
Owner HARBIN INST OF TECH
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