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This letter presents a control scheme to operate a boost converter in boundary conduction mode (BCM). In the proposed method, it is assumed that the zero-current information is not available for controlling the converter operation mode. Therefore, a cursor is identified to detect the converter operation mode, i.e., continuous conduction mode/BCM. Details of the cursor and associated control method...
This paper presents an implementation of the SenseGaN current sensing technique using Gallium Nitride (GaN) transistors as a representative of Wide Bandgap (WBG) semiconductors. For effective feedback control, fast over-current protection, and diagnostics-prognostics developments, precise current measurement becomes more important. While the integration and miniaturization of power semiconductors...
Coming with the reliability enhancement and the life extension for the Photovoltaic (PV) inverters modules, diagnostic techniques will be required to derive signature identification. The reliable operation of PV inverter is very crucial to get the highest performance for the long term. A new Smart Inverter Robustness Index (SIRI) is used for verifying the performance and robustness of the grid-tied...
This paper analyzes the impact of current sensing inaccuracies due to aging and ambient condition variations on robust operation of PV inverter systems. A novel index for analyzing the robustness of grid-tied AC-stacked PV inverter architectures has been used, which provides an opportunity for comprehensive robustness evaluation by considering four major operational characteristics of grid-tied PV...
Current sensing plays dominant role in power converters, where current information can be used for controlling, monitoring and protection. One of the most challenging goals in modern power electronics converters is to increase switching frequency for the purpose of miniaturization, and improve the performance especially for end-users. Therefore, the need for accurate, lossless, and fast response current...
Magnetoresistor/Rogowski coil can be utilized as a wideband contactless current sensor in power electronic converters. However, the magnetic Field detected by these sensing devices varies with frequency due to skin effect. This paper presents an investigation on two Magnetic field Concentration (MCON) techniques using conductive plates and power trace. These MCONs result in a more uniform magnetic...
In this paper, we present a new technique to unify and intensify the magnetic fields that results in higher performance of Anisotropic Magneto-Resistive (AMR) current sensors and consequently develop a closed loop controller for 100W synchronous GaN buck converter at 1MHz. The closed loop operation of high switching frequency converters at high power has always been a big challenge due to lack of...
This paper describes the design and evaluation of high current toroidal Printed Circuit Board (PCB) embedded inductor applicable for high frequency DC/AC converters (lower than 10MHz). The equivalent circuit model of the inductor is presented and the filtering effectiveness is verified by testing three different geometries with its own characteristics and function through a GaN converter. Besides,...
This paper presents the design and implementation of high power density and highly efficient air-core embedded inductor onto Printed Circuit Board (PCB) for 280W-5A/240nH, 280W-12A/150nH and 280W-18A/50nH. The toroidal structure due to its better performance on interfacing electromagnetic fields (EMI), is investigated. In addition, thermal restrictions are considered at high current capacity by reducing...
the global concern for the environment and greater increase in the demand for electricity justifies integration of electrical and thermal units in the future smart grids to improve the system efficiency and reduce costs and emissions. In the distribution networks, micro-Combined Heat and Power unit equipped with a thermal storage system is an excellent candidate to meet the electrical and thermal...
In this work, we introduce the short-term phase of a cooperative energy management algorithm, which exploits the flexibilities arising from the shifted switching of heating systems and charging and discharging of thermal storage. The cooperative approach does not follow any financial gain optimization for individual households but rather targets a solution that is beneficial for all parties involved...
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