First‐order integral switching surface sliding‐mode control method of active front end rectifier for fast charger applications

Abstract

This study proposes a control technique based on integral switching surface sliding‐mode control for three‐phase pulse‐width modulation (PWM) rectifier. The proposed control system is based on the combination of a conventional proportional–integral (PI) controller and with two decoupled first‐order sliding‐mode (PI‐FOSM) current controller. A set of integral switching surfaces based on the state‐space equation are designed in the internal loop to force the grid currents to track their desired values. The proposed control approach improves the transient response and minimises the steady‐state error under uncertainty. In addition, a conventional PI controller is also employed for the voltage regulation loop and generating the current reference of inner loops. In the controller design, all parameters of the system are considered with bounded perturbations in the design of control law. The main advantage of the proposed controller is robustness property against variations of entertained PWM rectifier parameters and external disturbances. The proposed PI‐FOSM can improve transient performance and can decrease of the harmonic components under steady‐state condition. In order to validate the theoretical contributions of this study, the performance of the proposed controller has been investigated by using a prototype laboratory.

Improved Sliding Mode Control of PMSM with Disturbance Compensation

“…In recent years, various nonlinear control methods have been applied to PMSM speed control systems, including adaptive control, fuzzy control, predictive control, and sliding mode control (SMC). Among these control techniques, SMC is widely utilized in motor speed control systems owing to its strong robustness, excellent dynamic performance, and ease of implementation [5,6]. To further enhance control performance for PMSMs, sliding mode control strategies have become a focal point of research for scholars worldwide [7][8][9][10].…”

Observer based sliding mode control of PMSM speed regulation system with a novel reaching law

“…Among these nonlinear control methods, SMC is widely used in practical applications for its simplicity, fast response and robustness [4,10,11]. However, the chattering phenomenon that caused by the parasitic dynamics and high-frequency switching is not desired in practical applications, since it can increase the mechanical wear or even excite the unmoulded high-frequency dynamics [10,12].…”

“…Boundary layer method [13], in which a thin boundary layer is introduced nearby the sliding surface, is one of the most commonly used method for chattering attenuation in practical applications [3,10,14]. However, the reachability condition cannot be guaranteed in the close neighbourhood of the sliding surface, thus the tracking performance and the robustness are compromised [11]. In order to reduce the chattering while preserving the main advantages of traditional SMC, high order SMC (HOSMC) has been proposed in the literatures [15,16,17].…”