• CONTROL THEORY AND APPLICATION •

### Sliding mode control of three-phase AC/DC converters using exponential rate reaching law

Narin JEERANANTASIN(), Suksun NUNGAM*()

1. 1 Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
• Received:2020-10-26 Online:2022-01-18 Published:2022-02-22
• Contact: Suksun NUNGAM E-mail:inc.techcom@gmail.com;suksunnungam1@gmail.com
• About author:|JEERANANTASIN Narin was born in 1983. He has received his B.S. and M.S. degrees in electrical engineering from King Mongkut’s University of Technology Thonburi, Bangkok, Thailand, in 2004 and 2007, respectively. He is currently pursuing his Ph.D. degree in electrical engineering at King Mongkut’s University of North Bangkok. His research interests include nonlinear control and power converters. E-mail: inc.techcom@gmail.com||NUNGAM Suksun was born in 1960. He received his Ph.D. degree in electrical engineering from National University of Singapore, in 1993. His research interests include nonlinear control and power converters. E-mail: suksunnungam1@gmail.com

Abstract:

Sliding mode control (SMC) becomes a common tool in designing robust nonlinear control systems, due to its inherent characteristics such as insensitivity to system uncertainties and fast dynamic response. Two modes are involved in the SMC operation, namely reaching mode and sliding mode. In the reaching mode, the system state is forced to reach the sliding surface in a finite time. The major drawback of the SMC approach is the occurrence of chattering in the sliding mode, which is undesirable in most applications. Generally, the trade-off between chattering reduction and fast reaching time must be considered in the conventional SMC design. This paper proposes SMC design with a novel reaching law called the exponential rate reaching law (ERRL) to reduce chattering, and the control structure of the converter is designed based on the multi-input SMC that is applied to a three-phase AC/DC power converter. The simulation and experimental results show the effectiveness of the proposed technique.