Results 51 to 60 of about 6,391,759 (278)

Enhanced Power Quality in Grid-Connected Photovoltaic Systems Using a Novel Modular Multilevel Inverter Topology [PDF]

Journal of Renewable Energy and Environment
Grid-connected photovoltaic (PV) systems face persistent power quality challenges, primarily due to the complexity of maintaining capacitor voltage balance in advanced multilevel inverters.
Omar Al Basri, Fayrooz Nori, Mohammed Hussein   +2 more
doaj   +1 more source

Optimal Design of Novel Electromagnetic-Ring Active Balancing Actuator with Radial Excitation

Chinese Journal of Mechanical Engineering, 2021
Imbalance vibration is a typical failure mode of rotational machines and has significant negative effects on the efficiency, accuracy, and service life of equipment.
Xin Pan, Xiaotian He, Haiqi Wu, Chuanlong Ju, Zhinong Jiang, Jinji Gao   +5 more
doaj   +1 more source

Modelling And Analysis Of A MEMS Approach To DC Voltage Step Up Conversion [PDF]

, 2003
This paper studies the principle of a voltage step-up converter based on a micromachined variable parallel-plate capacitor in combination with an electrostatic actuator.
Haas, C. H., Kraft, Michael, Haas, Christoph, Haas, C.H., Haas, Christoph H, Haas, CH,   +5 more
core   +1 more source

GelMA‐based 3D spheroids recapitulate transcriptomic and functional hallmarks of myeloid sarcoma

FEBS Open Bio, EarlyView.
GelMA 5% hydrogels support the formation of myeloid leukemia spheroids that recapitulate MS‐specific features, including G1 arrest, apoptosis, and ECM‐driven transcriptomic reprogramming. The 3D model mimicked soft‐tissue‐like stiffness and oxygen conditions, and transcriptomic convergence with primary MS samples confirmed its utility as a preclinical ...
Nicolas Germain, Elise Buret, Le Hoang Thanh Nguyen, Marion Cocheteux, Nicolas Touya, Mélanie Dhayer, Romain Dubois, Frank Lafont, Sebastien Janel, Patrice Maboudou, Steve Lancel, Philippe Marchetti   +11 more
wiley   +1 more source

Transformer-less multilevel inverter (TMLI) with reduced device count and voltage stress

e-Prime: Advances in Electrical Engineering, Electronics and Energy
The paper introduces a new transformer-less step-up switched capacitor topology that utilizes twelve switches to create nine different voltage levels. The salient features of the proposed topology are the least switching components, zero leakage current,
Kasinath Jena, Rishi Kesh, Dhananjay Kumar, Aditya Prasad Padhy, Md Irfan Ahmed, Chinmoy Kumar Panigrahi   +5 more
doaj   +1 more source

New topology for voltage balancing in railway substations

, 2012
This paper deals with a new technique of voltage unbalance compensation for single phase railway substations. Using the concept of Chopper Controlled Impedance, the authors study the feasibility of an active Steinmetz circuit based on AC choppers.
New topology for voltage balancing in railway substations Raimondo G, Caron H., MARINO, Pompeo, Ladoux P   +3 more
core  

Evaluating GenAI‐produced feedback on undergraduate bioscience essays against good higher education feedback practice

FEBS Open Bio, EarlyView.
This pilot study investigates the potential of Generative AI to provide formative feedback to students. ChatGPT was prompted to provide feedback on Year 1 Bioscience essays, which were evaluated against established good feedback practices. GenAI‐authored feedback had useful elements, but was limited in scope. GenAI may have potential to provide instant,
Annabel Court, Nigel Francis, Andrew Shore, Stephen Rutherford   +3 more
wiley   +1 more source

Triple-Voltage Gain and Self-Balancing in a New Switched-Capacitor Seven-Level Inverter for Microgrid Integration

Energies
In the context of power electronic interfaces in photovoltaic (PV), fuel cell, battery, and microgrid applications, the low output voltage of the DC source necessitates a voltage-boosting inverter. This paper proposes a single-source seven-level switched-
Mohamed Salem, Mahmood Swadi, Anna Richelli, Yevgeniy Muralev, Faisal A. Mohamed   +4 more
doaj   +1 more source

Recent insights into the molecular mechanism of ubiquinol oxidation by cytochrome bc1

FEBS Open Bio, EarlyView.
The review reflects on the mechanism of the catalytic reaction in cytochrome bc1: the electron bifurcation that involves the separation of two electrons derived from the quinol oxidation to opposite sides of the enzyme across the membrane. This review summarizes the long‐standing effort to understand the mechanism of quinol oxidation catalyzed by ...
Anna Wójcik‐Augustyn, Artur Osyczka, Marcin Sarewicz   +2 more
wiley   +1 more source

Self-Balanced Hexagon-Type Multilevel Inverter With Low Total Standing Voltage and High Efficiency

IEEE Open Journal of Power Electronics
This paper presents a seven-level switched-capacitor bipolar multilevel inverter topology that offers a minimum number of whole components. The proposed topology generates an output waveform with a single DC source, three capacitors with a rating equal ...
Abdul Hadi, Jul-Ki Seok
doaj   +1 more source