Direct Digital Control of Single-Phase AC/DC PWM Converter System

Young Chol Kim; Lihua Jin; Jinmok Lee; Jaeho Choi

Direct Digital Control of Single-Phase AC/DC PWM Converter System

Vol. 10, No. 5, pp. 518-527, Sep. 2010

10.6113/JPE.2010.10.5.518

Direct digital control

AC/DC PWM converter

Closed-loop identification

Characteristic ratio assignment (CRA)

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Abstract

This paper presents a new technique for directly designing a linear digital controller for a single-phase pulse width modulation (PWM) converter systems, based on closed-loop identification. The design procedure consists of three steps. First, obtain a digital current controller for the inner loop system by using the error space approach, so that the power factor of the supply is close to one. The outer loop is composed of a voltage controller, a current control loop including a current controller, a PWM converter, and a capacitor. Then, all the components, except the voltage controller, are identified by a discrete-time equivalent linear model, using the closed-loop output error (CLOE) method. Based on this 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.

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Cite this article

[IEEE Style]

Y. C. Kim, L. Jin, J. Lee, J. Choi, "Direct Digital Control of Single-Phase AC/DC PWM Converter System," Journal of Power Electronics, vol. 10, no. 5, pp. 518-527, 2010. DOI: 10.6113/JPE.2010.10.5.518.

[ACM Style]

Young Chol Kim, Lihua Jin, Jinmok Lee, and Jaeho Choi. 2010. Direct Digital Control of Single-Phase AC/DC PWM Converter System. Journal of Power Electronics, 10, 5, (2010), 518-527. DOI: 10.6113/JPE.2010.10.5.518.