IEEE Organizations related to Soft Switching

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Conferences related to Soft Switching

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Periodicals related to Soft Switching

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Most published Xplore authors for Soft Switching

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Xplore Articles related to Soft Switching

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Design and analysis of soft-switched Buck-Boost Converter for PV applications

2015 Annual IEEE India Conference (INDICON), 2015

In this paper fully integrated single switch DC-DC Buck-Boost Converter is designed and implemented for photovoltaic (PV) applications. Buck-Boost Converter is employed to transform the unregulated DC supply from the PV system to a regulated output voltage. Conventional switching of converters leads to power losses during switching there by reducing the efficiency of the system. In this work Zero Voltage ...


Soft commutated soft-two-switch DC/DC converter

2018 IEEE 12th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG 2018), 2018

In this paper, an improved structure of an isolated DC/DC converter is proposed. The presented structure achieves soft commutation and soft switching conditions. Soft commutation is gained using a passive-clamp circuit at low voltage side of the transformer. Also, a switch at high voltage side creating a freewheeling path during the commutation time interval to speed up the commutation is ...


Soft Switching Stacked-Up Boost Push-Pull Converter

2018 XIV International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE), 2018

This work describes boost type push-pull converter with actives rectification based on center tapped topology. It is shown that active rectification not only reduce static losses but makes converter bidirectional, which can be used to charge accumulator battery as well. Besides that active rectification makes transfer function linear down to the idle by recuperation input filter energy. Control method to ...


A Novel soft switching bidirectional dc dc converter

2018 Second International Conference on Inventive Communication and Computational Technologies (ICICCT), 2018

A novel soft-switching bidirectional dc-dc converter is proposed in this paper. In the proposed converter, zero-voltage-switching (ZVS) and Zero Current Switching (ZCS) are achieved by utilizing an auxiliary circuit, which consists of auxiliary switches, auxiliary inductor, diodes, and capacitors. Conduction losses is increases with increase in components. Switching losses are significantly reduced due to the ZVS operation of main switches. ...


High frequency soft switching half bridge series-resonant DC-DC converter utilizing gallium nitride FETs

2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017

The need for efficient, smaller, lighter and cheaper power supply units drive the investigation of using high switching frequency soft switching resonant converters. This work presents an 88% efficient 48V nominal input converter switching at 6 MHz and output power of 21 Watts achieving power density of 7 W/cm3 for Power-over-Ethernet LED lighting applications. The switching frequency is used to ...


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Educational Resources on Soft Switching

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IEEE-USA E-Books

  • Design and analysis of soft-switched Buck-Boost Converter for PV applications

    In this paper fully integrated single switch DC-DC Buck-Boost Converter is designed and implemented for photovoltaic (PV) applications. Buck-Boost Converter is employed to transform the unregulated DC supply from the PV system to a regulated output voltage. Conventional switching of converters leads to power losses during switching there by reducing the efficiency of the system. In this work Zero Voltage Source (ZVS) based soft switching is employed to buck boost converter without using auxiliary switches. A 200 W prototype model was designed, simulated in PSPICE and realized in hardware. The experimental results were found to be satisfactory.

  • Soft commutated soft-two-switch DC/DC converter

    In this paper, an improved structure of an isolated DC/DC converter is proposed. The presented structure achieves soft commutation and soft switching conditions. Soft commutation is gained using a passive-clamp circuit at low voltage side of the transformer. Also, a switch at high voltage side creating a freewheeling path during the commutation time interval to speed up the commutation is used. Soft switching is achieved using parasitic capacitors of the switches and diodes and also magnetic and leakage inductances of the transformer and there is no need to any auxiliary circuit or extra components. The theoretical analyses are verified according to the PSCAD simulation results.

  • Soft Switching Stacked-Up Boost Push-Pull Converter

    This work describes boost type push-pull converter with actives rectification based on center tapped topology. It is shown that active rectification not only reduce static losses but makes converter bidirectional, which can be used to charge accumulator battery as well. Besides that active rectification makes transfer function linear down to the idle by recuperation input filter energy. Control method to minimize static losses has been proposed. Commutation transitions have been analyzed. It is shown that inductor current reversal due to active rectifier employed provides resonant discharge of intrinsic capacitances and soft commutation for switching transitions of low side transistors. Soft commutation of high side transistors is provided by inductor current inertia. Prototype has been developed to verify analysis validity. Soft commutation has been confirmed. Efficacy achieved is 98.5%.

  • A Novel soft switching bidirectional dc dc converter

    A novel soft-switching bidirectional dc-dc converter is proposed in this paper. In the proposed converter, zero-voltage-switching (ZVS) and Zero Current Switching (ZCS) are achieved by utilizing an auxiliary circuit, which consists of auxiliary switches, auxiliary inductor, diodes, and capacitors. Conduction losses is increases with increase in components. Switching losses are significantly reduced due to the ZVS operation of main switches. Therefore, total efficiency is improved. In addition, there is no reverse- recovery problem of the intrinsic body diodes of the main switches.

  • High frequency soft switching half bridge series-resonant DC-DC converter utilizing gallium nitride FETs

    The need for efficient, smaller, lighter and cheaper power supply units drive the investigation of using high switching frequency soft switching resonant converters. This work presents an 88% efficient 48V nominal input converter switching at 6 MHz and output power of 21 Watts achieving power density of 7 W/cm3 for Power-over-Ethernet LED lighting applications. The switching frequency is used to control the output current delivered to the load resistance. The converter was tested using a constant resistance load. The performance and thermal behavior were investigated and reported in this work.

  • Soft switched auxiliary resonant circuit based boost converter with reduced stress using ZVT PWM

    The stress across the switch and the ripples in the output voltages in a Boost converter can be decreased with the help of soft switching. This paper proposes a soft switched auxiliary resonant circuit to provide a zero voltage transition (ZVT) turn on for the main switch in a conventional pulse width modulated boost converter. The proposed auxiliary circuit will enable the main switch to be turned on exactly or near to ZVT. The auxiliary circuit consists of an auxiliary switch which is also turned on by ZVT. The PWM boost converter causes voltage stress across the switches when turned on under non zero voltage turn on process. This voltage stress can be reduced by turning on the switch under ZVT. Moreover, the circuit has been designed to provide proper gating signals for the switches. Also the passive components involved in this circuit are designed for the reduction of voltage ripples that appears across the output voltage. Detailed operation and the circuit waveforms are theoretically explained. To verify the effectiveness of the proposed circuit, the simulation is done using PSIM software.

  • Pulse charger with zero current switching and isolation for electric vehicles and renewable energy applications

    Fast charging has become a major concern due to advents of more convenient methodologies of extracting renewable energy with the aid of new technology. Batteries are used widely to store energy and a charging technique that hinders the chemical reactions impeding the current is found. This technique known as pulse charging is thus comparatively fast and has received extensive attention over the last decade. Simultaneously, many fast charging topologies have been developed over the years with their own strengths and weaknesses. In this research a novel pulse charging topology with soft switching and isolation is introduced which facilitates high power pulse charging due to reduced switching losses.

  • Current source inverter based cascaded solid state transformer for AC to DC power conversion

    There are applications like railway traction system where power converters for HVAC to MVDC or MDAC to LVDC are required with a high power/weight ratio. The conventional way is to use heavy line frequency or medium frequency transformers followed by a controlled rectifier. The availability of high voltage SiC devices has made it possible to raise the switching frequency to higher value and hence the size and weight of the transformer can be reduced. This paper proposes a cascaded current source converter based topology with high frequency isolation as a replacement of the huge line frequency transformer. The paper also presents experimental results as a validation of the functionality of the converter.

  • Non-isolated bidirectional ZVT converter with a single resonant inductor for energy storage system

    This paper proposes a non-isolated bidirectional dc-dc converter for use in renewable power generation, fuel cell, battery, electric vehicles (EV), and small scale DC-UPS systems. Compared to the traditional bidirectional dc-dc converters, the proposed converter integrates interleaved synchronous energy flow and soft switching technology. By using a resonant cell, the converter can realize zero-voltage-transition (ZVT) where both the switch and the rectifier diode achieve soft condition without increasing their voltage and current stresses. The proposed converter has the advantages of simple circuitry, reduced size, low cost and high efficiency because of a sing resonant inductor. The operation principle of the converter is analyzed and described. Simulation results of the proposed bidirectional ZVT dc-dc converter are shown to verify its feasibility.

  • Comparison of efficiencies of interleaved boost converter for reenergy storage system

    In this paper three topologies of interleaved boost converters efficiencies are determined by calculating the losses of the components in the converter and compared. Batteries used in REESS are protected by charge controller using PWM technique. Overcharging batteries can reduce battery life or damage them so badly they become unusable; the charge controller regulates the power flow and protects the battery from overcharging and deep discharging. The converter efficiency is obtained by simulation with SIMULINK. A comprehensive comparison is done between these topologies on the basis of efficiency.



Standards related to Soft Switching

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