Approximate 2-Degree-of-Freedom control for interleaved PFC boost converters
14 May 2014-pp 1-6
TL;DR: In this article, a robust digital controller of the interleaved PFC boost converter using an A2DOF (Approximate 2-Degree-Of-Freedom) method for keeping up high power factor and low harmonics against any load is proposed.
Abstract: Making power factor and harmonics distortion of power supply better are needed. An interleaved boost converter is used for an active PFC (Power Factor Correction) for reducing ripples. In the PFC boost converter, if a duty ratio, a load resistance and an input voltage are changed, the dynamic characteristics are varied greatly. This is a prime reason of difficulty of controlling the PFC boost converter. In this paper, a robust digital controller of the interleaved PFC boost converter using an A2DOF (Approximate 2-Degree-Of-Freedom) method for keeping up high power factor and low harmonics against any load is proposed. Experimental studies using a microcontroller for the controller demonstrate that this type of digital controller is effective to improve power factor and to suppress the output voltage variation.
Citations
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TL;DR: In this article, the analysis of four phase boost interleaved DC-DC converter with the non-coupled inductors for higher power application in Continuous Conduction Mode is presented.
Abstract: This paper deals with the analysis of four phase boost interleaved DC-DC converter with the non-coupled inductors for higher power application in Continuous Conduction Mode. The interleaved topology reduces input and output current ripple, voltage ripple and improves the efficiency of SMPS. The value of capacities and inductances affect the behavior of the converter. The investigation of these parameters is described and supported by parametric simulation in LT spice.
4 citations
References
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22 Jun 1997
TL;DR: In this article, the authors present the practical implementation of a fully digital control for boost power factor preregulators (PFPs), which is simple and fast and provides a significant improvement in the system's dynamic performance compared to the usual analog control techniques.
Abstract: This paper presents the practical implementation of a fully digital control for boost power factor preregulators (PFPs). The control algorithm, which is simple and fast, provides a significant improvement in the system's dynamic performance compared to the usual analog control techniques. The paper discusses the design criteria and the actions taken for the implementation of the digital control, which is performed by means of a standard microcontroller (Siemens 80C166). The effectiveness of the approach is assessed by experimental tests.
246 citations
"Approximate 2-Degree-of-Freedom con..." refers background in this paper
...In the nonlinear interleaved PFC boost converter system, those controllers are not enough for attaining good performance [4]....
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01 Jan 1994
TL;DR: The aspects regarding control strategies for Power Factor Correction (PFC) converters are investigated and some experimental results for a PFC based on the Sepic topology are reported, which allow comparison of converter performance with different control techniques.
Abstract: The aspects regarding control strategies for Power Factor Correction (PFC) converters are investigated. The major control techniques to absorb sinusoidal input currents in boost PFC's are reviewed and analyzed. Their extension to other converter topologies is discussed and some experimental results for a PFC based on the Sepic topology are reported, which allow comparison of converter performance with different control techniques. Lastly, some considerations regarding dynamic operation are given, together with information about control IC's specifically developed for PFC applications.
206 citations
04 Mar 2001
TL;DR: In this paper, a digital signal processor (DSP) based power factor correction (PFC) scheme is presented, where a dual-loop controller is designed to control the average input AC current as well as DC bus voltage.
Abstract: In this paper a digital signal processor (DSP) based power factor correction (PFC) scheme is presented. A dual-loop controller is designed to control the average input AC current as well as DC bus voltage. The DSP controller is implemented and tested. Design methodologies and trade-offs such as discrete-time implementation methods are also presented.
91 citations
"Approximate 2-Degree-of-Freedom con..." refers methods in this paper
...Usually, an analog IC controller, a lead-lag controller or a gain-scheduled controller designed to the approximated linear controlled object at one operating point is used for the PFC converter [3]....
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Dissertation•
27 Jun 2003
TL;DR: This thesis studies the design method, implementation and cost effectiveness of digital control for both a P FC converter and for an advanced PFC converter for distributed power system (DPS).
Abstract: This thesis focuses on the study, implementation and improvement of a digital controller for a power factor correction (PFC) converter. The development of the telecommunications industry and the Internet demands reliable, cost-effective and intelligent power. Nowadays, the telecommunication power systems have output current of up to several kiloamperes, consisting of tens of modules. The high-end server system, which holds over 100 CPUs, consumes tens of kilowatts of power. For mission-critical applications, communication between modules and system controllers is critical for reliability. Information about temperature, current, and the total harmonic distortion (THD) of each module will enable the availability of functions such as dynamic temperature control, fault diagnosis and removal, and adaptive control, and will enhance functions such as current sharing and fault protection. The dominance of analog control at the modular level limits system-module communications. Digital control is well recognized for its communication ability. Digital control will provide the solution to system-module communication for the DC power supply. The PFC converter is an important stage for the distributed power system (DPS). Its controller is among the most complex with its three-loop structure and multiplier/divider. This thesis studies the design method, implementation and cost effectiveness of digital control for both a PFC converter and for an advanced PFC converter. Also discussed is the influence of digital delay on PFC performance. A cost-effective solution that achieves good performance is provided. The effectiveness of the solution is verified by simulation.
29 citations
TL;DR: In this paper, the authors proposed a new method for designing good approximate 2-degree-of-freedom (2DOF) digital controller which makes the control bandwidth wider, and at the same time makes a variation of the output voltage very small at sudden changes of resistive load.
25 citations
"Approximate 2-Degree-of-Freedom con..." refers methods in this paper
...In this paper, a robust digital controller of the interleaved PFC boost converter using an A2DOF (Approximate 2-Degree-Of-Freedom) method [5]-[6] for keeping up high power factor and low harmonics against any load is proposed....
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