Current control of a PWM inverter using sliding mode control and adaptive parameter estimation

This paper proposes an approach to control the current amplitude and phase of a PWM inverter simultaneously. To do this, sliding mode control and adaptive parameter estimation are applied to the current control of a single-phase PWM inverter with unknown R-L series load. The load parameters, R and L, are estimated by using the recursive least square method and these parameters are used to adjust the feedback gains of control input. The inverter system is modelled in a second-order system by treating load current variation caused by inductive component as a disturbance. A DSP-based (TMS320C30) PWM inverter controller is implemented to verify the effectiveness of the proposed control scheme. Simulations and experiments based on the second-order model show good dynamic response and low THD.<<ETX>>

[1]  Ying-Yu Tzou,et al.  Sliding mode control of a closed-loop regulated PWM inverter under large load variations , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[2]  Mario Marchesoni,et al.  Power conditioning system using sliding model control , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[3]  Donald W. Novotny,et al.  Current Control of VSI-PWM Inverters , 1985, IEEE Transactions on Industry Applications.

[4]  K. Jezernik,et al.  Sliding mode controller for a single phase inverter , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[5]  K.Y. Cho,et al.  Deadbeat current control for a voltage-fed PWM inverter with delayed input voltage feedback , 1991, Proceedings IECON '91: 1991 International Conference on Industrial Electronics, Control and Instrumentation.

[6]  G.C. Verghese,et al.  Recursive speed and parameter estimation for induction machines , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[7]  K. Uezato,et al.  Sinusoidal voltage controller for uninterruptible power supply by robust control , 1993, Conference Record of the Power Conversion Conference - Yokohama 1993.