Multiwinding Flyback Clamp Snubber for 10 kV IGCT With Reduced Voltage Stress on Clamp Recovery Diodes

Shirmohammadi, Siamak; Suh, Yongsug

doi:10.1109/tia.2020.2968269

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…In addition to the abovementioned aspects, the switching loss influence on the converter efficiency is of high importance. A lossless passive snubber can incredibly enhance efficiency [22]; nevertheless, the number of elements has been increased. Another efficient method is to design the converter in the DCM operation since MOSFET is turned on under ZCS conditions, and the reverse recovery loss is removed.…”

Section: Introductionmentioning

confidence: 99%

High Step-Up Boost-Cuk-Forward Converter with Reduced Switch Voltage Stress and Ripple-Free Input Current

Heidari,

Ghanbari,

Adib

et al. 2023

Energies

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A new combined boost-Cuk-forward (CBCF) converter with ripple-free input current and low switch voltage stress is proposed for high step-up applications. Two coupled inductors are applied to achieve low switch voltage stress as well as balanced dc-link voltages, wherein the former is placed in series with the boost diode, and the latter is formed as a forward converter. Because these inductors are coupled with the output Cuk inductor, a ripple-free input current is also attained. The proposed converter is run at discontinuous conduction mode (DCM) by applying a low output-side Cuk inductance to reduce the switching loss by providing a ZCS turn-on of MOSFET and removing the diode reverse recovery current. In addition, the proposed converter does not have a problem with ground leakage current. The practical results verify the performance and effectiveness of the proposed CBCF high step-up converter.

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Section: Introductionmentioning

confidence: 99%

High Step-Up Boost-Cuk-Forward Converter with Reduced Switch Voltage Stress and Ripple-Free Input Current

Heidari,

Ghanbari,

Adib

et al. 2023

Energies

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Research on Influence Factors and Acceleration Methods of Current Commutation

et al. 2020

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The vacuum interrupter is widely used due to the advantages of no arc-extinguishing medium and high insulation strength. However, the arc voltage generated by the commonly used CuCr contacts is low. In hybrid DC circuit breakers (DCCB), hybrid automatic transfer switches (ATS), medium voltage compound switches and other fields, it is difficult to rely on vacuum arc to complete natural commutation, which restricts the development of hybrid switches. In order to understand the current commutation process deeply, the influence of internal and external factors on the current commutation is analyzed by experiments. The coupling mathematical model of arc-commutated branch is established. The criterion for the success of current commutation is summarized. The parameters of the arc model are reconstructed through repeated breaking experiments to explore the influence of internal factors on the arc characteristics. Based on this, the influence law of arc current, contacts gap and transverse magnetic field (TMF) is analyzed. An acceleration method of current commutation is proposed. A prototype for accelerating experiments with an electromagnetic repulsion mechanism and TMF is developed. The commutated branch equivalent to practical applications is built. The experimental results show that the commutation time is effectively shortened and meets the requirements of practical applications through the acceleration method, which provides new thought for the development of hybrid switches.

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Advancement of SiC High-frequency Power Conversion Systems for Medium-Voltage High-Power Applications

Dong

Lin

Ravi

et al. 2020

2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia)

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Multiwinding Flyback Clamp Snubber for 10 kV IGCT With Reduced Voltage Stress on Clamp Recovery Diodes

Cited by 4 publications

References 31 publications

High Step-Up Boost-Cuk-Forward Converter with Reduced Switch Voltage Stress and Ripple-Free Input Current

High Step-Up Boost-Cuk-Forward Converter with Reduced Switch Voltage Stress and Ripple-Free Input Current

Research on Influence Factors and Acceleration Methods of Current Commutation

Advancement of SiC High-frequency Power Conversion Systems for Medium-Voltage High-Power Applications

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