DocumentCode :
3107660
Title :
Direct digital control of PWM converter using closed-loop identification
Author :
Kim, Young Chol ; Lim, Yeonsoo ; Jin, Lihua ; Lee, Jinmok ; Choi, Jeaho
Author_Institution :
Dept. of Electron. Eng., Chungbuk Nat. Univ., Cheongju, South Korea
fYear :
2009
fDate :
5-8 July 2009
Firstpage :
266
Lastpage :
271
Abstract :
This paper presents a new technique of designing a direct digital controller for a single-phase pulse width modulation (PWM) converter system, based on closed-loop identification. It is difficult to analytically design a controller due to the double loop structure of the PWM converter control system. The design procedure consists of three steps. First, obtain a current controller for the inner loop system by using the error space approach, which is a powerful method for robust tracking control design. The outer loop is composed of a voltage controller, a current control loop including the current controller, a PWM converter, and a capacitor. Then, all the components, except the voltage controller, are identified by a discrete-time equivalent linear method, using the closed-loop output error (CLOE) method. Based on the equivalent model, a proper digital voltage controller is then directly designed. It is shown through PSim simulations and experimental results that the proposed method is useful for the practical design of PWM converter controllers.
Keywords :
PWM power convertors; closed loop systems; control system synthesis; direct digital control; discrete time systems; electric current control; robust control; voltage control; PSim simulation; PWM converter controller; closed-loop output error method; current control loop; digital voltage controller; direct digital controller; discrete-time equivalent linear method; error space approach; robust tracking control design; single-phase PWM converter system; Control system analysis; Control systems; Digital control; Digital modulation; Error correction; Pulse width modulation; Pulse width modulation converters; Robust control; Tracking loops; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics, 2009. ISIE 2009. IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-4347-5
Electronic_ISBN :
978-1-4244-4349-9
Type :
conf
DOI :
10.1109/ISIE.2009.5213601
Filename :
5213601
Link To Document :
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