Hits:

Affiliation of Author(s):自动化学院

Title of Paper:A Novel Approach of Health Condition Assessment for Boost Converters under Variable Temperature Conditions

Journal:Diangong Jishu Xuebao

Abstract:The health condition assessment for key components based on characteristic parameter estimation is one of the most significant technologies for circuit-level prognostics and health management (PHM). However, changes in operating temperature can lead to inconsistencies in the estimated values of characteristic parameters and their failure criteria (at 25 degrees Celsius), resulting in inaccurate condition evaluation. Therefore, for the non-ideal Boost converter, firstly, this paper provides the values of characteristic parameters by particle swarm optimization (PSO) algorithm. Then, the mathematical models of the characteristic parameters and operating temperature for electrolytic capacitor and power MOSFET are established, respectively. Meanwhile, the normalized factor (NF) and health index (HI) are defined in this paper. Finally, to achieve health condition assessment under various temperature conditions, a novel approach of updating the model parameters dynamically based on unscented particle filter is proposed. In addition, experimental results show that the parameter identification error is less than 5% and the health evaluation accuracy is over 90%. © 2018, Electrical Technology Press Co. Ltd. All right reserved.

ISSN No.:1000-6753

Translation or Not:no

Date of Publication:2018-03-25

Co-author:Sun, Quan,Jiang, Yuanyuan,Shao, Liwei

Correspondence Author:Sun, Quan,wang you ren