Iterative Learning Controller With Multiple Phase-Lead Compensation for Dual-Mode Flyback Inverter

作者：Kim Hyosin; Lee Jin S; Lai Jih Sheng; Kim Minsung

来源：IEEE Transactions on Power Electronics, 2017, 32(8): 6468-6480.

DOI：10.1109/TPEL.2016.2614602

• Continuous conduction mode (CCM)
• discontinuous conduction mode (DCM)
• nominal duty
• single-stage inverter
• switching linear systems

This paper proposes an iterative learning control (ILC) scheme for a dual-mode flyback inverter operating in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM). In dealing with more than 200-W power applications, the dual-mode flyback inverter takes advantage of both DCM and CCM operations. However, it is difficult to control the output current because the system gain is quite low in DCM and the system transfer function has a right-half plane zero in CCM. To overcome the problems occurring in DCM and CCM operations, we propose an ILC scheme with multiple phase-lead compensation. The ILC is proposed to achieve accurate reference tracking and to reject periodic disturbances. The multiple phase-lead compensation technique is then employed to compensate for the effect of different system dynamics. As a theoretical result, we derive the asymptotic stability of the closed-loop system. We also performed the numerical simulations and experimental tests to validate the proposed control approach.

• 出版日期2017-8
• 单位美国弗吉尼亚理工大学(Virginia Tech)