Results 71 to 80 of about 5,536,000 (158)

An Active Knee–Ankle–Foot Orthosis With Torque‐Dense, Low‐Impedance Knee Actuation

Advanced Intelligent Systems, EarlyView.
This article presents the simulation, design, and clinical validation of a robotic active KAFO with torque‐sensitive actuation. By passively and continuously adapting the transmission ratio in response to the knee torque, the torque‐sensitive actuator overcomes the tradeoff between torque, weight, and impedance observed in conventional robot actuators,
Brendon Ortolano, Kai Pruyn, Rosemarie Murray, Lukas Gabert, Tommaso Lenzi   +4 more
wiley   +1 more source

Estudo de comportamento das perdas no ferro em motores de indução alimentados por conversores de frequência: [dissertação] [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia Elétrica.Este trabalho propõe uma metodologia experimental para a avaliação das perdas no ferro de motores alimentados com tensão
Pires, Waldiberto de Lima
core  

Influence of power quality and stack temperature on the specific energy consumption of alkaline electrolyzer

IET Renewable Power Generation
The efficiency of the power‐to‐hydrogen (P2H) alkaline electrolyzer (AE) is the primary factor constraint on its large‐scale application. Decreasing the specific energy consumption (SEC) of AE is positive to enhancing the efficiency of P2H system ...
Yannan Dong, Zhe Chen, Xiangjun Li, Haixin Wang, Zijiao Han, Shaohua Ma, Xin Yao   +6 more
doaj   +1 more source

Synchronisation of a distributed control and data acquisition system for modular multi-level PHIL amplifiers

The Journal of Engineering, 2019
This research presents a novel technique to synchronise a modular control and data acquisition system for the testing of multi-level power hardware-in-the-loop (PHIL) amplifiers.
Kenneth D. Sands, Mark A. H. Broadmeadow, Mark A. H. Broadmeadow, Geoffrey R. Walker   +3 more
doaj   +1 more source

Serum Chitotriosidase Links to Activated Glia at Chronic Active Lesion Rims in Multiple Sclerosis Brain

Annals of Neurology, EarlyView.
Objective The objective of this study was to explore the association between 18 kDa translocator protein (TSPO)‐positron emission tomography (PET)–measurable glial activation and serum chitotriosidase (CHIT1) in people with multiple sclerosis (pwMS), and its expression in postmortem MS brain tissue.
Venla Ahola, Maija Saraste, Edoardo Pedrini, Joel Tuomaala, Luzia Buchholz, Markus Matilainen, Johanna Lindenberg, Eeva‐Christine Brockmann, Maria Sofia Martire, Sofia Sandgren, David Leppert, Jens Kuhle, Tanja Kuhlmann, Martina Absinta, Laura Airas   +14 more
wiley   +1 more source

Control of Dual-Opposed Stirling Convertors with Active Power Factor Correction Controllers [PDF]

, 2006
When using recently-developed active power factor correction (APFC) controllers in power systems comprised of dual-opposed free-piston Stirling convertors, a variety of configurations of the convertors and controller(s) can be considered, with ...
Lewandowski, Edward J., Schreiber, Jeffrey G., Regan, Timothy F.   +2 more
core  

Class D amplifier power stage with PWM feedback loop [PDF]

, 2012
This paper presents a Second-Order Pulse Width Modulation (PWM) feedback loop to improve Power Supply Rejection (PSR) of any open-loop PWM Class-D amplifiers (CDAs). PSR of the audio amplifier has always been a key parameter in mobile phone applications.
Cox, Stephen M., Yeo, Kiat Seng, Cox, Stephen Michael, Yeo, K.S., Lam, C.K., Tan, Meng Tong, Lam, Chun Kit, Tan, M.T.   +7 more
core   +1 more source

Seven‐level dual‐buck inverter for photovoltaic power generation

IET Renewable Power Generation
A power processing system (PPS) with a seven‐level dual‐buck inverter (SLDBI) for a photovoltaic (PV) power generation system is proposed. The PPS is comprised of a boost power converter and an SLDBI.
Jinn‐Chang Wu, Hurng‐Liahng Jou, Fu‐Zen Chen, Han‐Xin Huang   +3 more
doaj   +1 more source

Soft start-up scheme for the hybrid distribution transformer

The Journal of Engineering, 2018
Hybrid distribution transformer (HDT) is an integrated system of the conventional distribution transformer and the PWM converters, which can greatly enhance the controllability of the conventional distribution transformer and is important for the ...
Yibin Liu, Deliang Liang, Mingkang Zhang, Yang Liang, Qixu Chen, Qingshan Wang   +5 more
doaj   +1 more source

Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion [PDF]

, 2012
Class D amplifiers are based on a low-bit pulse width modulated (PWM) signal reconstructed through the lowpass characteristic of the loudspeaker. To create a PWM signal, a non-linear conversion from a standard pulse code modulated (PCM) signal has to be ...
Weiss, Stephan, Macleod, Malcolm, Morrison, Christopher, Stewart, Robert   +3 more
core   +3 more sources