Results 121 to 130 of about 11,229 (312)

Nonlinear modeling of a permanent‐magnet induction machine

Electrical Engineering in Japan, 2002
AbstractThis paper presents the nonlinear modeling of a permanent‐magnet induction machine (PMIM). The PMIM has a permanent‐magnet (PM) rotor that is free to rotate inside a squirrel‐cage rotor. The internal self‐excitation from this PM rotor allows the PMIM to operate at a higher power factor. Utilizing a duality between magnetic and electric circuits,
Fukami, Tadashi, Nakagawa, Kenichi, Hanaoka, Ryoichi, Takata, Shinzo, Miyamoto, Toshio   +4 more
openaire   +2 more sources

Core Losses and Torque Ripple in IPM Machines: Dedicated Modeling and Design Trade Off [PDF]

, 2009
The proper combination of stator and rotor slot numbers is pursued in the design of interior permanent-magnet (IPM) motors with wide constant-power speed range.
P. Guglielmi, Paolo Guglielmi, Guglielmi, Paolo, A. Vagati, Vagati, Alfredo, Gianmario Pellegrino, F. Villata, G. Pellegrino, Villata, Franco, Franco Villata, Pellegrino, Gian-Mario Luigi, Alfredo Vagati, PELLEGRINO, GIAN - MARIO LUIGI   +12 more
core   +1 more source

AI–Guided 4D Printing of Carnivorous Plants–Inspired Microneedles for Accelerated Wound Healing

Advanced Materials, EarlyView.
This work presents an artificial intelligence (AI)‐guided 4D‐printed microneedle platform inspired by carnivorous plants for wound healing. A thermo‐responsive shape memory polymer enables body temperature–triggered self‐coiling for autonomous wound closure.
Hyun Lee, Moon‐Jo Kim, DongEung Kim, Chan Ho Moon, Seojoon Bang, Hyeong Seok Kang, Ju Yeong Gwon, Jong Hwa Seo, Junhyub Jeon, Junhyuk Son, Munwon Lim, Minho Kang, Dong Yun Lee, Donghyun Lim, Jung‐Hoon Park, Gi Doo Cha, Soo‐Hong Lee, Tae‐Sik Jang, Kisuk Yang, Yunho Jeong, Youngho Eom, Hyun‐Do Jung   +21 more
wiley   +1 more source

Sensorless position control of permanent magnet motors with pulsating current injection and compensation of motor end-effects [PDF]

, 2011
The sensorless position control of permanent-magnet motors is successfully implemented by superimposing a high-frequency voltage signal on the voltage reference or adding a high-frequency current signal to the current reference.
G Pellegrino, CUPERTINO, Francesco, Pellegrino G, Cupertino, F., SALVATORE L., Pellegrino, Gian-Mario Luigi, CUPERTINO F, Giangrande, P., P Giangrande, Salvatore, L., GIANGRANDE P, L Salvatore, PELLEGRINO, GIAN - MARIO LUIGI, F Cupertino   +13 more
core   +1 more source

Conductive Hydrogels for Exogenous Sensing and Cell Fate Control

Advanced Materials, EarlyView.
We engineer electrically conductive hydrogels by combining sulfated glycosaminoglycans with semiconducting polymers. These hydrogels bind bioactive proteins, including growth factors, whose release or retention can be modulated by low‐voltage stimulation. The hydrogels are also integrated as 3D channels in organic electrochemical transistors as part of
Teuku Fawzul Akbar, Carlos Alejandro Jimenez‐Rodriguez, Railia Biktimirova, Ilka Hermes, Thomas Kurth, My Duyen Pham, Mikhail Tsurkan, Jens Friedrichs, Francis L. C. Morgan, Hans Kleemann, Olga Guskova, Uwe Freudenberg, Peter Fratzl, Carsten Werner, Christoph Tondera, Ivan R. Minev   +15 more
wiley   +1 more source

Permanent Magnet Rotor Flux Linkage Control Through Direct Axis Field Amplification

IEEE Open Journal of Industry Applications
Permanent magnets are popular for electric vehicle rotors due to their high energy density, making them excellent candidates for high-torque and high-speed machines. The downside of a permanent magnet machine is the inability to regulate the rotor field,
David Klink, Matthew J. Bagnara, Greg Heins, Behrooz Bahrani   +3 more
doaj   +1 more source

Design issues of an IPM motor for EPS [PDF]

, 2011
In electric power steering (EPS), permanent magnet (PM) brushless ac (BLAC) motors offer distinct advantages over other electric motor types in terms torque smoothness, reliability and efficiency.
Shen, Jian-Xin, Luk, Patrick Chi-Kwong, Wang, Can-Fei, Fei, Wei-Zhong, Jin, Meng-Jia   +4 more
core   +1 more source

Large‐Scale Determination of Frontier Orbital Energies of Disordered Small‐Molecule Organic Semiconductors Using Exciplex Emission Spectra

Advanced Materials, EarlyView.
ABSTRACT Accurately knowing the frontier orbital energies of the structurally disordered small‐molecule organic semiconductors that are used in optoelectronic devices such as organic light‐emitting diodes is required to rationally improve their performance. Here, we show that these energies can be deduced with a large accuracy from the peak energies of
Christian B. McDonald, Hiroki Tomita, Giacomo Cotelli, Louka L. Brüll, Nanno G. de Rooij, Lucas R.L. Norg, Milo Clément, Reinder Coehoorn   +7 more
wiley   +1 more source

A flexible flux adjustable variable flux leakage starter‐generator for helicopters

IET Electric Power Applications
A variable flux leakage starter‐generator structure designed for helicopters is proposed. The research focuses on investigating the current distribution mechanism of the d‐q axis to determine the feasibility of incorporating variable flux leakage (FL) in
Hainiu Chen, Shuhua Fang, Ling Qin, Yicheng Wang, Qiangren Xu   +4 more
doaj   +1 more source

The Effect of Dummy Slots on Machine Performance in Brushless Permanent Magnet Machines: An Analytical, Numerical, and Experimental Study

Iranian Journal of Electrical and Electronic Engineering, 2022
Low-speed brushless permanent magnet machines are ideal for use in gearless propulsion systems. It is important to provide a precise analytical model to determine the performance characteristics of these machines.
A. Jabbari
doaj