Search query: current fed zcs converter analysis

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abstract: This paper presents a systematic derivation of a small signal model of current fed half bridge isolated dc/dc converter for the hybrid electric vehicle based on the lithium battery and fuel cell. The reflected output voltage across the power semiconductor devices can naturally be clamped at Vdeg/n by a secondary modulation strategy without any additional circuit, which can reduce footprints and cost. Moreover, the soft switch of all can be achieved resulting in low switching losses and higher efficiency due to ZCS/ZVS. In order to maintain the constant bus voltage and the balanced two way inductor current, a small signal model using state space averaging technique is deduced and the dual closed loop controller is designed in detail. The co simulation of PSIM and MATLAB/SIMULINK is used to verify the effectiveness of the controller when the load step changes in case of the different input voltage.
author_names: Minchi Xie

Yigeng Huangfu

Qingchao Zhang

Qian Li

Dongdong Zhao

Yuntian Liu
title: Small Signal Analysis and Control Design of Snubberless Naturally Clamped ZCS/ZVS Current Fed Half Bridge DC/DC Converter for EV
venue: IECON 2018 44th Annual Conference of the IEEE Industrial Electronics Society
year: 2018

abstract: The paper proposes and analyzes an impulse commutation based zero current switching (ZCS) current fed three phase push pull dc/dc converter. The classic problem of turn off spike in current fed converters has been addressed via impulse commutation. A small high frequency capacitor is used to solve the problem. The resonance between the leakage inductances and the parallel capacitors facilitates zero current operation of the devices via impulse commutation and confines the maximum switch voltage to Vo/n naturally. Variable frequency modulation aids in regulating the output voltage. Impulse commutation offers reduction in the component count (snubber or active clamp) and superior performance with low circulating currents. Simulation results using PSIM 9.3 and experimental results on 1kW laboratory prototype have been demonstrated to corroborate the aforementioned claims.
author_names: Radha Sree Krishna Moorthy

Akshay Kumar Rathore
title: Analysis and design of impulse commutated ZCS three phase current fed push pull DC/DC converter
venue: 2016 IEEE Applied Power Electronics Conference and Exposition (APEC)
year: 2016

abstract: This paper presents a novel snubberless naturally clamped bidirectional current fed half bridge isolated dc/dc converter for fuel cell vehicles (FCVs) The proposed converter achieves zero current switching (ZCS) of the primary side active semiconductor devices and zero voltage switching of the secondary side active semiconductor devices. It is a potential topology for FCVs, front end dc/dc power conversion for fuel cell inverters, and energy storage. A proposed secondary modulation clamps the voltage across the primary side devices (current fed) naturally and eliminates switch turn off voltage spike concern with ZCS without any additional circuit. This leads to reduced footprints and lower cost. Voltage across the primary side current fed devices is independent of duty cycle like conventional current fed converters but clamped at a reflected output voltage. Therefore, comparatively low voltage rating devices with a low on state resistance are used, introducing low conduction losses and higher efficiency. Steady state analysis, operation, design, simulation, and experimental results of the proposed converter are reported in this paper.
author_names: Akshay Kumar Rathore

R PrasannaU
title: Analysis, Design, and Experimental Results of Novel Snubberless Bidirectional Naturally Clamped ZCS/ZVS Current Fed Half Bridge DC/DC Converter for Fuel Cell Vehicles
venue: IEEE Transactions on Industrial Electronics
year: 2013

abstract: This paper presents steady state analysis and simulation of full bridge current fed dc dc converter with Synchronous rectification. This converter is best suited for Grid connected Fuel Cell applications. Synchronous rectifier circuit with voltage doubler was implemented on the secondary side of H/F isolation Transformer. Secondary modulation technique helps in reducing blocking voltage spike of the primary side switches at low value. The proposed converter topology ensures Zero Current Switching (ZCS) on primary side and Zero Voltage Switching (ZVS) on secondary side of H/F isolation transformer. Primary devices clamped at low voltage, which intends to use power MOSFET's with low ON state resistance values we can go with less conduction losses moreover all power switches ensuring soft switching which will reduce the switching losses there by the converter efficiency will improve. The proposed converter is analyzed and simulated for 250W with an input voltage of 12V and the output voltage is modulated using duty cycle from 150V 300V.
author_names: Mule Sai Krishna Reddy

Devaraj Elangovan
title: Analysis and simulation of ZCS current fed full bridge high gain DC DC converter with Synchronous rectification
venue: 2015 Conference on Power, Control, Communication and Computational Technologies for Sustainable Growth (PCCCTSG)
year: 2015

abstract: A full dc and ac analysis of a previous proposed boost type input soft switching full bridge converter is presented. The primary side switches turn on/off under a zero current condition (ZCS) The soft switching is realized by using a simple snubber, formed by two uni directional switches and a resonant capacitor, in the primary side. The snubber's switches commute under a zero voltage condition. The resonant energy used for getting ZCS is self adaptable, depending only on the value of the input current. Except when the input current is at its maximum value, less resonant energy is used, keeping the conduction losses at a low value. A dc analysis allows for the calculation of the duty cycle. The duty cycle loss, the maximum voltage across the snubber capacitor, and the duration of the soft switching assisted intervals (the charging and discharging intervals of the snubber capacitor) are represented for different values of the resonant capacitor and the leakage inductance of the converter transformer. These graphics allow for an optimized design, by trading off the voltage stress on the resonant capacitor (i.e. on the primary side switches) with the loss of duty cycle (i.e. with the ZCS regulation range) The range of the input voltage and load variation for which both output voltage regulation and soft switching are assured is determined. Soft switching is obtained for a wide line and load range. A current controlled feedback circuit, using a digital signal processor (DSP) with a soft start scheme was implemented. A small signal ac analysis of the power stage allowed for the design of the digital controllers.
author_names: H Wang

H S -h Chung

Saad Tapuchi

Adrian Ioinovici
title: Modeling and Analysis of a Current Fed ZCS Full Bridge DC/DC Converter with Adaptive Soft Switching Energy
venue: 2009 Twenty Fourth Annual IEEE Applied Power Electronics Conference and Exposition
year: 2009

abstract: In this paper, a single phase single stage isolated zero current switched (ZCS) current fed full bridge ac/dc converter is proposed for IGBT based high power power factor correction (PFC) applications. By adding an additional commutation path and few resonant components, ZCS operation is realized for all IGBTs. The conduction loss is also lowered by the additional path. Furthermore, the control strategy for the proposed converter is compatible with that developed for traditional PFC converter. In this paper, the topology derivation and circuit operational analysis are given. The control strategy is introduced. A 3 kw prototype is developed and tested to verify the circuit functionality. Finally, the efficiency performance is investigated and comparison is made to show the advantages of the topology.
author_names: Chushan Li

Yu Zhang

Zhifang Cao

Dewei David Xu
title: Single Phase Single Stage Isolated ZCS Current Fed Full Bridge Converter for High Power AC/DC Applications
venue: IEEE Transactions on Power Electronics
year: 2017

abstract: Impulse commutated current fed push pull (ICCPP) converter has been analyzed and designed. The topology maintains zero current switching (ZCS) of the semiconductor devices. Variable frequency modulation has been adopted to regulate load voltage and achieve ZCS over variable input voltage. At fixed input voltage, ZCS and load voltage are load independent. Natural clamping of devices is achieved via impulse commutation. Push pull converters have only two devices with common ground with source requiring simple gate drive circuitry. A comprehensive study of the proposed converter, including steady state analysis and design, has been reported. A 500 W prototype was developed in the laboratory to evaluate and demonstrate the performance of the converter.
author_names: K Radha Sree

Akshay Kumar Rathore
title: Impulse Commutated Zero Current Switching Current Fed Push Pull Converter: Analysis, Design, and Experimental Results
venue: IEEE Transactions on Industrial Electronics
year: 2015

abstract: This paper presents the performance analysis of current fed push pull dc/dc converter based on ZCS with impulse commutation. The basic problem of conventional current fed converter is turn off spikes. This problem has been solved by impulse commutation. For zero current operation of devices with impulse commutation the resonance is achieved between leakage inductances and parallel capacitors reduces the components of circuit and provide low circulating current. The simulation results using MATLAB 2015b have been obtained for input, switches, inductances, capacitors, diodes, and output.
author_names: Pavan Singh Tomar

Ashok Kumar Sharma

Kanak Hada

Jyoti Gupta
title: Performance analysis of current fed impulse commutated three phase push pull DC/DC converter
venue: 2017 International Conference On Smart Technologies For Smart Nation (SmartTechCon)
year: 2017

abstract: An interleaved current fed capacitor less DC/AC converter for PV systems is proposed in this paper with the merits low input current ripple, high power density and high reliability. This proposed DC/AC converter is composed of an interleaved current fed dc/pulsating dc converter cascaded with a three phase pulsating dc/ac inverter through pulsating dc link modulation. The pulse width modulation of frontend converter is encoded with the sinusoidal information of three phase line voltage, and it will reduce the switching frequency of pulsating dc/ac inverter. The power density and lifetime of the proposed converter can be increased significantly by eliminating the intermediate electrolytic capacitor, which benefits from pulsating dc link instead of fixed dc link. Meanwhile, secondary clamping technique applied in the front end dc/pulsating dc converter can realize zero current switching (ZCS) for the primary side and zero voltage switching (ZVS) for the secondary side, and is able to avoid voltage spikes caused by the transformer leakage inductance as well. Moreover, the current fed topology and interleaved structure can lower the input current ripple. The aforesaid merits make the converter suitable for PV systems. Steady state operation modes, analysis, simulation and experience results are presented in this paper. A 1kW laboratory prototype is built to demonstrate the validity of the proposed topology.
author_names: Yue Zhang

Zheng Wang

Ming Cheng
title: Analysis of an interleaved current fed capacitor less DC/AC converter for PV systems
venue: 2017 IEEE Energy Conversion Congress and Exposition (ECCE)
year: 2017

abstract: A new soft switched, current driven full bridge converter is presented. The new topology has the advantages of simple circuit topology, soft switching implementation with simple snubber device, high efficiency and simple control and is formed by two unidirectional switches and a capacitor to realize soft switching operation over a wide line and load range. The energy used for soft switching is self adaptable. For a given input current, the snubber capacitor is charged to the minimum required energy for ZCS of the switches. Thus, less resonant energy is used and the conduction loss can be kept minimal. The cyclical switching operation and control of the converter will be simulated using MATLAB 7.5b. This proposed method make the converter promising for medium and high power applications are required. The experimental results measured on a 5 kw, 530 5300kv confirms the advantages of the proposed converter.
author_names: Mrs Deva Brinda

Neena Ramesh
title: DESIGN AND ANALYSIS OF ZCS CURRENT FED FULL BRIDGE CONVERTER
year: 2011