This paper is concerned with the problem of modeling and simulation of piecewise linear systems with the pulse width modulation control. Models of this kind of systems are widely used in engineering practice, in particular in power electronic converters. The research provides the study of chaos and bifurcations in one of the switching converters – step-down converter under voltage mode control,...

Energy Scavenging for Wireless Sensor Nodes with a Focus on Vibration to Electricity Conversion by Shadrach Joseph Roundy Doctor of Philosophy in Mechanical Engineering University of California, Berkeley Professor Paul K. Wright, Chair The vast reduction in size and power consumption of CMOS circuitry has led to a large research effort based around the vision of ubiquitous networks of wireless ...

Resonant converters are one of the most exciting power supply topologies. These converters are popular for many applications because the performance increases power efficiency, minimizes components count, and reduces Electromagnetic Interference (EMI) over older power supply topologies. Soft switching is the representative feature of resonant converters. However, use of the body diode in resona...

Power hardware-in-the-loop (PHIL) is an experimental technique that uses power amplifiers and real-time simulators for studying the dynamics of electronic converters electrical grids. PHIL tests provide means functional validation advanced control algorithms without burden building high-power prototypes during early TRL. However, replicating behavior systems with laboratory SDC can be complex. ...

course contents of b.sc. and even m.sc. or ph.d. programs in electrical power engineering in our country is mainly based on conventional; technologies employed in different sectors of generation, transmission and distribution of electricity. electricity industry in iran has been successful in localization and transfer of technology from foreign countries and research centers and universities ha...

Resonant converters are one of the most exciting power supply topologies. These converters are popular for many applications because the performance increases power efficiency, minimizes components count, and reduces Electromagnetic Interference (EMI) over older power supply topologies. Soft switching is the representative feature of resonant converters. [1][2] However, use of the body diode in...

The electricity market and environmental concerns, with wide utilization of renewable sources, have improved the diffusion of distributed generation units changing the operations of distribution grids from passive networks to microgrids. A microgrid includes a cluster of electrical loads, energy storage devices and microsources, which provide both power and heat to their local area. A microgrid...

In accordance with the proceeding technical development in the area of electronic power semiconductors the maximum off-state voltages and on-state currents have rapidly increased in the recent years. As a consequence semiconductor elements are not only used for the known purposes. A new challenge is to replace the standard motor-generator sets with static frequency converters based on power sem...

This paper proposes a Flexible Power Electronic Transformer (FPET) for the application in the micro-grids. The low frequency transformer is usually used at the Point of Common Coupling (PCC) to connect the low voltage grid and utility network to each other. The conventional 50Hz transformer results in enhanced low voltage-grid power management system during grid-connected operation. In this pap...