scholarly journals Analysis and Design of Filament Power Supply with Voltage-Fed Single-Switch ZVS Inverter

2018 ◽  
Vol 64 ◽  
pp. 07007
Author(s):  
Yang Yueh-Ru
Keyword(s):  
Power Supply ◽  
Line Voltage ◽  
Leakage Inductance ◽  
Zero Voltage Switching ◽  
Analysis And Design ◽  
Secondary Voltage ◽  
Resonant Capacitor ◽  
Isolation Transformer ◽  
Output Capacitance ◽  
Zero Voltage

In this paper, an off-line voltage-fed single-switch zero-voltage-switching (ZVS) inverter is analyzed and designed for the filament power supply of cooker magnetrons. Due to the low resistance of cathode filament, an isolation transformer with large turn ratio is used. To obtain the ZVS operation, a parallel-resonant capacitor is connected to the primary of transformer. The capacitor, transformer and filament constitute a parallel resonant tank. Both the transformer leakage inductance and the transistor output capacitance are merged into the resonant tank. The resonant energy provides the ZVS operation of the inverter switch, and the secondary voltage drives the cathode filament. To verify the analysis, a prototype inverter is built and tested. Experimental results validate the circuit design.

scholarly journals Three-Port Converter for Integrating Energy Storage and Wireless Power Transfer Systems in Future Residential Applications

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 272
Author(s):  
Hyeon-Seok Lee ◽  
Jae-Jung Yun
Keyword(s):  
Energy Storage ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Leakage Inductance ◽  
Zero Voltage Switching ◽  
High Voltage Gain ◽  
Receiving Coil ◽  
Resonant Capacitor ◽  
Zero Voltage

This paper presents a highly efficient three-port converter to integrate energy storage (ES) and wireless power transfer (WPT) systems. The proposed converter consists of a bidirectional DC-DC converter and an AC-DC converter with a resonant capacitor. By sharing an inductor and four switches in the bidirectional DC-DC converter, the bidirectional DC-DC converter operates as a DC-DC converter for ES systems and simultaneously as a DC-AC converter for WPT systems. Here, four switches are turned on under the zero voltage switching conditions. The AC-DC converter for WPT system achieves high voltage gain by using a resonance between the resonant capacitor and the leakage inductance of a receiving coil. A 100-W prototype was built and tested to verify the effectiveness of the converter; it had a maximum power-conversion efficiency of 95.9% for the battery load and of 93.8% for the wireless charging load.

ISOLATED HIGH STEP-UP ZERO-VOLTAGE-SWITCHING DC-DC CONVERTER WITH A CONTINUOUS INPUT CURRENT

2011 ◽  
Vol 20 (08) ◽  
pp. 1619-1635 ◽  
Author(s):  
HYUN-LARK DO
Keyword(s):  
High Efficiency ◽  
Input Current ◽  
Leakage Inductance ◽  
Zero Voltage Switching ◽  
Analysis And Design ◽  
High Voltage Gain ◽  
Power Switches ◽  
Continuous Input ◽  
Zero Voltage ◽  
Voltage Switching

An isolated high step-up DC-DC converter with a continuous input current is proposed. The proposed converter consists of two converter cells — a boost converter cell at the input stage for a low input current ripple and a DC-DC converter cell for high voltage gain. Zero-voltage-switching of power switches are achieved and the leakage inductance of the transformer alleviates the reverse-recovery problems of the output diodes. Therefore, the proposed converter achieves high efficiency. Detailed analysis and design of the proposed converter are carried out. A prototype of the proposed converter is developed, and its experimental results are presented for validation.

scholarly journals A special high-frequency soft-switched DC/DC power supply for GCT gate driver

2021 ◽  
Author(s):  
Jahangir Afsharian
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Optimization Procedure ◽  
Power Supplies ◽  
Zero Voltage Switching ◽  
General Power ◽  
Gate Driver ◽  
Isolation Transformer ◽  
Experimental Use ◽  
Gate Drivers

This thesis is devoted to the development of a novel parallel isolated power supply (PIPS) for the gate driver of integrated Gate Commutated Thyristors (GCT). The proposed PIPS is essentially a special high frequency soft switched DC/DC converter, integrating six parallel isolated power supplies in one module where each power supply generates a regulated dc supply for the GCT gate driver. In commercial GCT power supplies, a high-voltage isolation transformer is indispensable but highly inefficient in terms of cost and size, which can be significantly improved by the optimized transformer. In all, this design strives to achieve a general power supply for powering up the gate drivers of all types of GCT devices in all MV applications with minimal changes in configuration. In this thesis, the configuration of PIPS is presented and its operating principle is elaborated. The transformer optimization procedure satisfying the voltage isolation requirement of GCT gate drivers is extensively discussed. The performance of PIPS, including the front end DC/DC converter, zero voltage switching phase-shift full bridge (ZVS-PS-FB) converter, and the optimization of the transformer, is verified by simulations and experiments where a 360W laboratory prototype is built for the experimental use.

scholarly journals Design and Implementation of 2.5kW IBFB-LLC DC/ DC Converter Using SiC Mosfet

2021 ◽  
Vol 31.2 (149) ◽  
pp. 7-14
Keyword(s):  
High Frequency ◽  
Power Flow ◽  
Input Voltage ◽  
Voltage Range ◽  
Zero Voltage Switching ◽  
Design And Implementation ◽  
Switching Losses ◽  
Power Switches ◽  
Isolation Transformer ◽  
Zero Voltage

Interleaved Boost Full Bridge integrated LLC resonant (IBFB- LLC) is an isolated DC/DC converter with directional power flow, which can cope with a wide input voltage range of PV applications. The main losses of the converter are switching losses of the power switches and transformers losses. This paper proposes a method to improve the efficiency of the IBFB converter due to zero voltage switching technique, in combination with employing new SiC MOSFET technology instead of the conventional Si MOSFET. In addition, Litz wire is also adopted to reduce the losses on the high frequency isolation transformer. Both numerical simulations and experiments with a prototype 2.5kW converter are implemented to verify the feasibility and effectiveness of the proposed solution.

Design of Full-bridge DC-DC Converter 311/100 V 1kW with PSPWM Method to Get ZVS Condition

2017 ◽  
Vol 8 (1) ◽  
pp. 59
Author(s):  
Toni Prasetya ◽  
F. Danang Wijaya ◽  
Eka Firmansyah
Keyword(s):  
Power Loss ◽  
Transition Process ◽  
Switching Frequency ◽  
Leakage Inductance ◽  
Zero Voltage Switching ◽  
Switching Power ◽  
Turn On ◽  
In Series ◽  
Zero Voltage ◽  
Primary Current

Enhancing the switching frequency can increase the power density of a fullbridge dc-dc converter. However, power loss in switches will increase due to the intersection of voltage and current during turn-on and turn-off transition process. The switching power loss can be reduced by making the condition of zero voltage switching (ZVS) which in this study is obtained by using the phase-shifted PWM method. Achieving this condition requires appropriate parameters such as deadtime, leakage inductance, and the primary current of transformer in sufficient value. In this study, ZVS is achieved when the transformer leakage inductance of 14.12 μH is added with external inductance of 24.29 μH which is installed in series with transformer and when the primary current of transformer is more than 1.289 A.

Realization of a Novel Soft-Switch of Inverting Spot Welding Power Supply

2012 ◽  
Vol 546-547 ◽  
pp. 344-351
Author(s):  
Peng Shu Zhao ◽  
Xu Dong Wang ◽  
Xiao Song Na ◽  
Miao Sen Yang
Keyword(s):  
Power Supply ◽  
Spot Welding ◽  
Soft Switching ◽  
Soft Switch ◽  
Zero Voltage Switching ◽  
Welding Power Supply ◽  
The Relationship ◽  
Zero Voltage ◽  
Improve Stability ◽  
Voltage Switching

The technology of soft-switching can improve stability ,reliability and efficiency of the inverting spot welding power supply .In this paper ,a new kind of topology of zero-voltage switching spot welding power supply is proposed ,which is auxiliary circuit in paralleling with the lagging lag ,so it can afford auxiliary current of soft switch .With the relationship between circuit state of every working mode of main circuit and main circuit parameters in new topology ,the ability of searching optimal overall situation of ACA is used to optimize circuit parameters ,and it turns out to confirm the advantage of this topology .

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