Results 91 to 100 of about 89,369 (307)
Design of a High-Performance High-Pass Generalized Integrator Based Single-Phase PLL
, 2016 Grid-interactive power converters are normally synchronized to the grid using phase-locked loops (PLLs). The performance of the PLLs is affected by the non-ideal conditions in the sensed grid voltage such as harmonics, frequency deviations and dc offsets
John, Vinod, Kulkarni, Abhijit
core +1 more source
Direct torque control of brushless DC drives with reduced torque ripple [PDF]
, 2005 The application of direct torque control (DTC) to brushless ac drives has been investigated extensively. This paper describes its application to brushless dc drives, and highlights the essential differences in its implementation, as regards torque ...
Howe, D., Liu, Y., Zhu, Z.Q.
core +1 more source
Advanced Functional Materials, EarlyView.Photomultiplication organic photodetectors (PM OPDs) are an attractive strategy for health‐monitoring. Here, PM‐OPDs are reported with a specific detectivity of 5.7 × 1012 Jones and external quantum efficiency values of 3500% under −10 V. The dynamics of carrier trapping in these devices are elucidated through trap selective spectroscopical techniques.
Marie Houot +9 more
wiley +1 more source
Experimental Studies of Power Quality Indicators of Autonomous Low-Power Generators
Energy Engineering and Control SystemsExperimental studies of the main indicators of power quality at the terminals of autonomous low-power generators were carried out. The content of higher voltage harmonics, as well as voltage and frequency deviations from the nominal value were determined.
Ivan Hlad +2 more
doaj +1 more source
Communications, 2013 The paper deals with the steady state analysis of electromagnetic torque ripples of a two-phase induction machine, which is supplied by a half-bridge connected inverter with IGBT transistors.
Pavel Zaskalicky, Ludek Schreier
doaj +1 more source
Five-level selective harmonic elimination PWM strategies and multicarrier phase-shifted sinusoidal PWM: A comparison [PDF]
, 2005 The multicarrier phase-shifted sinusoidal pulse-width modulation (MPS-SPWM) technique is well-known for its important advantage of offering an increased overall bandwidth as the number of carriers multiplied with their equal frequency directly controls ...
Agelidis, V.G. +3 more
core +1 more source
Direct control strategy for a four-level three-phase flying-capacitor inverter [PDF]
, 2010 A direct predictive control strategy is proposed for a three-phase four-level flying-capacitor (FC) inverter in this paper. The balancing of the FC voltages, a challenge in applications with small capacitors and low switching frequencies, is done without
Defaÿ, François +2 more
core +1 more source
Advanced Functional Materials, EarlyView.A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou +8 more
wiley +1 more source
Power quality issues of 3MW direct-driven PMSG wind turbine [PDF]
, 2015 This paper presents power quality issues of a grid connected wind generation system with a MW-class direct-driven permanent magnet synchronous generator (PMSG).
Ahmed, IA, Taylor, GA, Zobaa, AF
core +1 more source
Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces
Advanced Functional Materials, EarlyView.A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai +6 more
wiley +1 more source