Indirect sliding mode control of power converters via double integral sliding surface

Siew Chong Tan, Y. M. Lai, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

192 Citations (Scopus)


The steady-state regulation error in power converters that use the conventional hysteresis-modulation-based sliding mode controller can be suppressed through the incorporation of an additional integral term of the state variables into the controller. However, it is found that with the indirect type of sliding mode controller (derived based on the equivalent control approach), the same approach of integral sliding mode control is ineffective in alleviating the converter's steady-state error. Moreover, the error increases as the converter's switching frequency decreases. This paper presents an in-depth study of the phenomenon and offers a solution to the problem. Specifically, it is proposed that an additional double-integral term of the controlled variables to be adopted for constructing the sliding surface of indirect sliding mode controllers. Simulation and experimental results are provided for verification.
Original languageEnglish
Pages (from-to)600-611
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number2
Publication statusPublished - 1 Mar 2008


  • Double-integral sliding mode (SM)
  • Nonlinear controller
  • Power converters
  • Pulsewidth modulation (PWM)
  • Sliding mode (SM) control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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