Characteristics Of DC-DC Converter Research Articles

Characteristics of DC-DC Converter using High-Frequency Amorphous Transformer with Interleaved-Winding for HVDC Transmission System

Characteristics of DC-DC Converter using High-Frequency Amorphous Transformer with Interleaved-Winding for HVDC Transmission System

Computer Techniques for Dynamic Modeling of DC-DC Power Converters

Computers play an important role in the analyzing and designing of modern DC-DC power converters. This book shows how the widely used analysis techniques of averaging and linearization can be applied to DC-DC converters with the aid of computers. Obtained dynamical equations may then be used for control design. The book is composed of two chapters. Chapter 1 focuses on the extraction of control-to-output transfer function. A second-order converter (a buck converter) and a fourth-order converter (a Zeta converter) are studied as illustrative examples in this chapter. Both ready-to-use software packages, such as PLECS® and MATLAB® programming, are used throught this chapter. The input/output characteristics of DC-DC converters are the object of considerations in Chapter 2. Calculation of input/output impedance is done with the aid of MATLAB® programming in this chapter. The buck, buck-boost, and boost converter are the most popular types of DC-DC converters and used as illustrative examples in this chapter. This book can be a good reference for researchers involved in DC-DC converters dynamics and control.

Quantifying the Complexity of DC–DC Switching Converters by Joint Entropy

Joint entropy is used to quantify the complex nonlinear states of dc-dc switching converters in this brief. The switching instant symbolic sequence (SISS) and the topological structural symbolic sequence (TSSS) are presented based on the characteristics of dc-dc converters. Transforming SISS and TSSS into the decimal symbolic sequences, joint entropy is obtained as the index to quantify the nonlinearity of the dc-dc converter. Finally, a Cuk converter is studied as an example to explain how the joint entropy can quantify the complex state of the dc-dc switching converter.

Static and Dynamic Characteristics of DC-DC Converter Using a Digital Filter

This paper presents the regulation and dynamic characteristics of the dc-dc converter with digital PID control, the minimum phase FIR filter or the IIR filter, and then the design criterion to improve the dynamic characteristics is discussed. As a result, it is clarified that the DC-DC converter using the IIR filter method has superior performance characteristics. The regulation range is within 1.3%, the undershoot against the step change of the load is less than 2% and the transient time is less than 0.4ms with the IIR filter method. In this case, the switching frequency is 100kHz and the step change of the load R is from 50 Ω to 10 Ω. Further, the superior characteristics are obtained when the first gain, the second gain and the second cut-off frequency are relatively large, and the first cut-off frequency and the passing frequency are relatively low. Moreover, it is important that the gain strongly decreases at the second cut-off frequency because the upper band pass frequency range must be always less than half of the sampling frequency based on the sampling theory.

Topologies and characteristics of DC-DC converters using class E resonant switch

A class E resonant switch is developed from the conventional class E resonant converter. Using the class E resonant switch instead of the PWM switch, a new family of class E resonant converters is proposed. Assuming the current flowing through the tuned network of the converter is a pure sinusoidal waveform, the characteristics of the converters are analyzed using Fourier series expansion. As a result, it is known that a class E resonant converter can convert a constant voltage to a constant current or vice versa and the output regular can be accomplished over a narrow band of switching frequency. The operation principle and the analysis are verified by experiments on 2-MHz converters.