Modulation strategy for a matrix structured ac to dc converter is developed. This modulation strategy enables the input displacement factor correction without current sensing. Mathematical proof that ac to dc converter can operate with unity input displacement factor is provided by analysis based on the switching matrix approach. Theoretical analysis demonstrates the algorithm requirements. Com...

This application note describes the use of a Fairchild QFET (FQP60N03L ) in the power supply (DC-DC converter) of computer microprocessors. Chapter 2 describes QFET’s organizational features and the improvements in its electrical characteristics based on these features. Chapter 3 outlines the required input voltage and current based on the latest trends in microprocessors, and describes the opt...

This paper presents a new single stage DC-DC multilevel boost converter topology with very high voltage gain ratio. It is a Pulse width modulation (PWM) based switched inductor multilevel boost converter (SIMLC) consisting of two switched inductors, 2N+2 Diodes, 2N-1 Capacitors for N level boost converter. High switching frequency has been used to decrease component size. The proposed converter...

this paper presents a novel control method to improve the efficiency of low-voltage dc-dc converters at light loads. pulse width modulation (pwm) converters have poor efficiencies at light loads, while pulse frequency modulation (pfm) control is more efficient for the same cases. switching losses constitute a major portion of the total power loss at light loads. to decrease the switching losses...

In this paper, Fuzzy Logic controller is developed for ac/ac Matrix Converter. Furthermore, Total Harmonic Distortion is reduced significantly. Space Vector Algorithm is a method to improve power quality of the converter output. But its quality is limited to 86.7%.We are introduced a Cross coupled DQ axis controller to improve power quality. The Matrix Converter is an attractive topology for Hi...

This paper deals with the control of a grid-connected multi-source power system based on photovoltaic (PV) array and battery energy storage (ESS), taking into account variable intermittent characteristics solar irradiation level ambient temperature in Morocco. The PV generator is connected via dc-dc boost converter to common dc bus which through bidirectional ESS. output mains PWM dc-ac an LCL ...

General block diagram models are proposed for PWM DC-DC converters in continuous and discontinuous conduction modes with fixed switching frequency. Both current mode control and voltage mode control are addressed in these models. Based on these models, detailed nonlinear and linearized sampled-data dynamics are derived. Asymptotic orbital stability is analyzed. Audio-susceptibility and output i...