Results 1 to 10 of about 1,485 (260)
Energies, 2021 A modular multilevel converter’s (MMC’s) submodule (SM)-capacitor voltage will increase under unbalanced grid conditions. Depending on the imbalance level, the voltage ripple can be considerably high, and it can exceed the pre-defined safe limits.
Songda Wang +4 more
doaj +3 more sources
Integrated optimization of loss distribution and capacitor voltage ripple for MMC devices
电力工程技术Under inverter operating conditions, significant loss is incurred by the insulated gate bipolar transistor (IGBT) (referred to as T2 tube) in the lower part of the half-bridge submodule.
SU Tiantian +4 more
doaj +2 more sources
IEEE Open Journal of Power ElectronicsThis paper evaluates the submodule capacitor current and voltage ripple of a direct three-phase to single-phase ac/ac MMC under unbalanced grid conditions.
Ygor Pereira Marca +3 more
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A hybrid phase-shifted PWM technique for a 13-level inverter with low switch count and suppressed charging spike [PDF]
Scientific ReportsThis paper introduces a novel 13-level switched capacitor inverter. The proposed structure, comprising ten switches, five diodes, one input DC source, and five capacitors, can generate an alternating output voltage with a sixfold increase in the output ...
Hossein Mansourizadeh +3 more
doaj +2 more sources
Technique for the reduction of output voltage ripple of switched capacitor-based DC–DC converters
IET Circuits, Devices and Systems, 2011 Switch capacitor DC-DC converter is an emerging concept for high dropout application. This paper discusses techniques for output voltage ripple reduction of an embedded dual-switch capacitor - linear regulator-based hybrid DC-DC converter. In spite of deploying the advantage of PSRR property of the linear regulator, the ripple at the output of the ...
K Bhattacharyya
exaly +2 more sources
Study of Capacitor & Diode Aging effects on Output Ripple in Voltage Regulators and Prognostic Detection of Failure [PDF]
International Journal of Electronics and Telecommunications, 2022 Objectives: To design and simulate a buck converter and detector circuit which can prognostically indicate the power supply failure. Failure of Aluminium Electrolytic Capacitor (AEC) is considered as the parameter causing the power supply failure.
Preethi Sharma K, T. Vijayakumar
doaj +1 more source
Techniques to Reduce Capacitor Voltage Ripples in Multilevel Inverters
IEEE Access, 2023 Reducing ripples on the capacitor voltage has two benefits: improved output waveform quality and accurate converter size. During the generation of a given output voltage level, the factor “Inherent Redundant Paths (IRPs)” has a considerable impact on the characteristics of multilevel inverter design.
Shivam Prakash Gautam +6 more
openaire +2 more sources
Frontiers in Energy Research, 2022 This study presents a strategy to reduce the capacitance of the submodule (SM) capacitor of a modular multilevel converter-based medium-voltage wind power converter. The design of the SM capacitor of the modular multilevel converter (MMC) should consider
Jianhang Qian +4 more
doaj +1 more source
Reduction of Half-Arm Current Stresses and Flying-Capacitor Voltage Ripples of Flying-Capacitor MMCs [PDF]
IEEE Access, 2020 In this paper, a new control scheme that can reduce the current stresses on switching devices, flying capacitors, and inductors for flying-capacitor modular multilevel converters (FC-MMCs) is proposed, which is based on redistribution of power difference between upper and lower arms through the flying capacitors.
Duc Dung Le 0001, Dong-Choon Lee
openaire +2 more sources
Optimization Methods to Reduce Capacitor Stress in Modular Multilevel Converters
IEEE Access, 2020 Modular multilevel converters consist of many capacitor half-bridge or full-bridge converter cells. Stresses on the capacitors result from peak capacitor voltage, capacitor voltage ripple and current ripple.
Nikola Petranovic +3 more
doaj +1 more source