In many control problems, the control strategy is phrased in terms of average quantities. In this paper we prove the general result that, given a linear system ẋ = Ax + u where A is hyperbolic, u is piecewise linear and L-periodic, such that R L 0 u(t)dt = 0, then there exists a unique Lperiodic solution x = xp(t) such that R L 0 xp(t)dt = 0. We then consider a DC/DC buck (step-down) converter ...

Abstract: In this paper, power loss and cost models of power electronic converters based on converter ratings and datasheet information are presented. These models aid in creating rapid prototypes which facilitate the component selection process. Through rapid prototyping, users can estimate power loss and cost which are essential in design decisions. The proposed approach treats main power ele...

The paper presents a low-cost current sensor for power capacitors in power electronic converters, especially for DC link electrolytic capacitors of PWM converters. The sensor is based on a Rogowskicoil which is implemented very cost-effectively using a small standard printed circuit board (PCB) located directly at the capacitor terminals. Due to the measuring principle the output signal inheren...

in the near future the use of distributed generation systems will play a big role in the production ofelectrical energy. one of the most common types of dg technologies , fuel cells , which can be connectedto the national grid by power electronic converters or work alone studies the dynamic behavior andstability of the power grid is of crucial importance. these studies need to know the exact mo...

Power semiconductor devices are the key electronic components used in power electronic systems. The solid-state power electronic revolution started with the invention of the thyristor or Silicon Controlled Rectifier (SCR) in 1956, and many power semiconductor devices have been produced since then. Advances in semiconductor technology have improved the efficiency of electronic devices which resu...

A novel application and generalization of sigma–delta ( ) modulation has emerged in three-phase power-electronic converters. A conventional modulator with scalar signals and binary quantizer is generalized to a modulator with vector signals and a hexagonal quantizer. Indeed, power-electronic switching states may be thought of as determining the quantizer outputs. The output spectrum is a key pe...

The increasing utilization of piezoelectric transformers (PT) in power electronics requires fundamental analysis and design of PT power converters. In addition, the possibility of overcoming the essential limitations of PT power ability by a combined operation of PTs needs to be examined. These studies could provide wide opportunities for PT exploitation in power electronic circuits. The main o...

Cascaded H-bridge multilevel power electronic converters generally require several dc sources. An alternative option is to replace all the separate dc sources feeding the H-bridge cells with capacitors, leaving only one H-bridge cell with a real dc voltage source. This will yield a cost-effective converter. However, the required capacitor voltage balancing is challenging. In this paper, using t...

1. Project Goals  Develop hybrid, differential-algebraic-equations (DAE) based simulation methods using OpenDSS, which enable simulation of very large-scale power systems with large number of power electronic converters.  Develop models (DLL) in OpenDSS for the main FREEDM components SST, DESD and DRER including the main controllers and IEM and IPM.  Simulate and analyze FREEDM system perfor...

DC-DC converters are widely used in application such as computer peripheral power supplies, car auxiliary power supplies and medical equipments. Positive output element Luo converter performs the conversion from positive source voltage to positive load voltage. Due to the timevarying and switching nature of the power electronic converters, their dynamic behaviour is highly non-linear. Conventio...