Stability Analysis of DAB Converters with Boundary Control for Electrical Vehicles

Zhenyan Cao, Huiqing Wen, Haochen Shi, Qinglei Bu

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review

1 Citation (Scopus)

Abstract

Advanced automotive electrical systems employ multi-voltage level ac and dc systems as well as electrical mechanism systems that have unique characteristic, dynamic and stability problems due to the time dependency of converters. Power electronic converters and motor drives in tightly regulated automotive systems often behave as constant power loads which have negative impedance characteristics. Classical control methods often focus on the constant resistance load where the linearizing analysis is applying in time domain. In this paper, based on the DAB DC-DC converter, circular switching surface (CSS) strategy which achieves step-up and step-down operations by controlling the four transistors, is described to avoid the instability of constant power load. This CSS control strategy is a nonlinear method to observe the switching actions of different states in phase plane (Vout, iL). This report has described the control law of this proposed closed loop control method. Meanwhile, some simulation results and experimental results have indicated the feasibility of CSS control strategy.

Original languageEnglish
Title of host publication2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1373-1377
Number of pages5
ISBN (Electronic)9781728153018
DOIs
Publication statusPublished - 29 Nov 2020
Event9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia - Nanjing, China
Duration: 29 Nov 20202 Dec 2020

Publication series

Name2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia

Conference

Conference9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
Country/TerritoryChina
CityNanjing
Period29/11/202/12/20

Keywords

  • DAB converter
  • Stability
  • circular switching surface
  • closed-loop control

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