Study and implementation of a low conduction loss zero-current resonant switch

1994 ◽  
Vol 41 (2) ◽  
pp. 241-250 ◽  
Author(s):  
A. Brambilla ◽  
E. Dallago ◽  
P. Nora ◽  
G. Sassone
Keyword(s):  
Conduction Loss ◽  
Zero Current ◽  
Resonant Switch

New Single Phase Bridgeless CUK Converter Topology for Power Factor Enhancement Based on Fuzzy Logic Control

2015 ◽  
Vol 24 (07) ◽  
pp. 1550102 ◽  
Author(s):  
P. M. Dhanasekaran ◽  
R. Balamurugan ◽  
P. Veena ◽  
R. Nithya
Keyword(s):  
Fuzzy Logic ◽  
Power Factor ◽  
Electromagnetic Interference ◽  
Single Phase ◽  
Fuzzy Logic Controller ◽  
Inrush Current ◽  
Cuk Converter ◽  
Conduction Loss ◽  
Zero Current ◽  
Current Ripple

A new single phase bridgeless power factor correction (PFC) converter derived from CUK topology is proposed. In this new CUK converter, the absence of the front end diode bridge results in the less switching and conduction losses compared to the conventional PFC converter. The current flow in the proposed converter configuration has only two semiconductor switches and it results in less conduction loss during each interval of the switching cycle. It offers less input current ripple, less electromagnetic interference (EMI) and also protection against the starting inrush current. It is mostly preferred compared to the other PFC topologies since it has both continuous input and output currents with a reduced current ripple. The proposed converter uses the simple control strategy and is made to work in the discontinuous conduction mode (DCM) to achieve almost a unity power factor. It also offers zero current turn ON and turn OFF for power switches. The performance of the proposed PFC converter is tested in MATLAB/SIMULINK environment with fuzzy logic controller (FLC). The simulation results of the proposed new CUK PFC converter validate the effectiveness of FLC in power factor enhancement.

scholarly journals A Novel Single-Switch High Step-Up DC–DC Converter with Three-Winding Coupled Inductor

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6288
Author(s):  
Aline V. C. Pereira ◽  
Marcelo C. Cavalcanti ◽  
Gustavo M. Azevedo ◽  
Fabrício Bradaschia ◽  
Rafael C. Neto ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Switching Loss ◽  
Current Switching ◽  
Conduction Loss ◽  
High Voltage Gain ◽  
Zero Current Switching ◽  
Zero Current ◽  
Voltage Stress ◽  
Photovoltaic Applications ◽  
Coupling Techniques

This paper introduces a single-switch, high step-up DC–DC converter for photovoltaic applications such as power optimizers and microinverters. The proposed converter employs two voltage multipliers cells with switched capacitor and magnetic coupling techniques to achieve high voltage gain. This feature, along with a passive clamp circuit, reduces the voltage stress across the switch, allowing for the employment of low RDSon MOSFET. This leads to low conduction loss of the switch. The diodes operate with zero-current switching at their turn-off transition, eliminating the reverse recovery losses. Additionally, the switch turns on with zero-current switching, leading to insignificant switching loss associated with its turn-on transition. The operation principle and steady-state analysis are presented and validated through experimental results obtained from a 140 W prototype of the proposed converter.

scholarly journals Wide Load Range ZVS Three-level DC-DC Converter: Modular Structure, Redundancy Ability, and Reduced Filters Size

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3537 ◽  
Author(s):  
Yong Shi ◽  
Zhuoyi Xu
Keyword(s):  
Power Systems ◽  
High Voltage ◽  
High Performance ◽  
Low Voltage ◽  
Modular Architecture ◽  
Load Range ◽  
Zero Voltage Switching ◽  
Conduction Loss ◽  
Zero Current Switching ◽  
Zero Current

In future dc distributed power systems, high performance high voltage dc-dc converters with redundancy ability are welcome. However, most existing high voltage dc-dc converters do not have redundancy ability. To solve this problem, a wide load range zero-voltage switching (ZVS) three-level (TL) dc-dc converter is proposed, which has some definitely good features. The primary switches have reduced voltage stress, which is only Vin/2. Moreover, no extra clamping component is needed, which results simple primary structure. Redundancy ability can be obtained by both primary and secondary sides, which means high system reliability. With proper designing of magnetizing inductance, all primary switches can obtain ZVS down to 0 output current, and in addition, the added conduction loss can be neglected. TL voltage waveform before the output inductor is obtained, which leads small volume of the output filter. Four secondary MOSFETs can be switched in zero-current switching (ZCS) condition over wide load range. Finally, both the primary and secondary power stages are modular architecture, which permits realizing any given system specifications by low voltage, standardized power modules. The operation principle, soft switching characteristics are presented in this paper, and the experimental results from a 1 kW prototype are also provided to validate the proposed converter.

scholarly journals Novel Soft-Switching Integrated Boost DC-DC Converter for PV Power System

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 749 ◽  
Author(s):  
Khairy Sayed ◽  
Mohammed G. Gronfula ◽  
Hamdy A. Ziedan
Keyword(s):  
Pulse Width Modulation ◽  
High Efficiency ◽  
High Gain ◽  
Boost Converter ◽  
Soft Switching ◽  
Prototype Model ◽  
Semiconductor Switches ◽  
Zero Current ◽  
Resonant Switch ◽  
Resonant Inductor

This paper presents a novel soft-switching boost DC-DC converter, which uses an edge-resonant switch capacitor based on the pulse width modulation PWM technique. These converters have high gain voltage due to coupled inductors, which work as a transformer, while the boost converter works as a resonant inductor. Upon turning on, the studied soft switching circuit works at zero-current soft switching (ZCS), and upon turning off, it works at zero-voltage soft switching (ZVS) while using active semiconductor switches. High efficiency and low losses are obtained while using soft switching and auxiliary edge resonance to get a high step-up voltage ratio. A prototype model is implemented in the Power Electronics Laboratory, Assiut University, Egypt. Seventy-two-panel PV modules of 250 W each were used to simulate and execute the setup to examine the proposed boost converter.

Sign in / Sign up

Export Citation Format

Share Document