Results 131 to 140 of about 350 (182)

Using unmanned aerial vehicles (drones) to improve access to blood in low‐ and middle‐income countries: Current challenges and opportunities

Vox Sanguinis, Volume 121, Issue 6, Page 700-709, June 2026.
Abstract Blood transfusion is life‐saving for patients in emergencies, but low‐ and middle‐income countries (LMICs) often face a severe shortage of banked blood. Establishing blood banks in rural areas presents substantial logistical and economic challenges for many LMICs.
Suvro Sankha Datta, Ritwick Mondal, Shramana Deb, Giuseppe Tortora, Angela Pirri   +4 more
wiley   +1 more source

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HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source

Durability of filament-wound composite flywheel rotors

Durability of filament-wound composite flywheel rotors
Accepted: 2011-07-13 資料番号 ...
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Proposal of a 2DOF Wound-Rotor Resolver

IEEE Sensors Journal, 2021
Two Degrees of Freedom (2DOF) electrical machines are widely used in robotics. They need position sensors for their electronic commutation and high performance control loop. 2DOF resolvers are the best choice for such applications. Therefore, in this paper a new configuration is proposed for rotational-linear position estimation.
Fateme Zare, Zahra Nasiri-Gheidari
openaire   +1 more source

Bifurcation Analysis of the Wound Rotor Induction Motor

International Journal of Bifurcation and Chaos, 2015
This work deals with the bifurcation phenomena that occur during the open-loop operation of a single-fed three-phase wound rotor induction motor. This paper demonstrates the occurrence of saddle-node bifurcation, hysteresis, supercritical saddle-node bifurcation, cusp and Hopf bifurcation during the individual operation of this electromechanical ...
Rubén Salas-Cabrera, María Angélica Hernández-Colín, Joe Alan Roman-Flores, Eduardo Nacu Salas-Cabrera   +3 more
openaire   +1 more source

Speed regulation of induction motors with wound rotor

IFAC Proceedings Volumes, 2013
Abstract The regulation of speed is required in many applications of induction motors, including in electric locomotives and electric driving vehicles. In this paper the speed control problem for a wound rotor induction motor is considered. The speed is controlled by changing the external resistance in the rotor circuit.
Elena Solovyeva, Gennady A. Leonov, Alexander Zaretskiy   +2 more
openaire   +2 more sources

The Wound-Rotor Design and Finite Element Analysis of Wound-Rotor Brushless Double-Feed Motor

Advanced Materials Research, 2013
In this paper, firstly the operation principle of the brushless double-fed motor is introduced. Secondly by means of the single-pole slot-number phase diagram, the rotor windings are designed and analyzed, and it is proved that the designed motor can assure the equality of the induced branch EMF and satisfy the demands of other electrical properties ...
Xiao Peng, Yun Xiong Song, Wan Tai Liu
openaire   +1 more source

Nonlinear control of wound-rotor synchronous-motor

2006 IEEE Conference on Computer Aided Control System Design, 2006 IEEE International Conference on Control Applications, 2006 IEEE International Symposium on Intelligent Control, 2006
The problem of controlling wound rotor synchronous motors is considered. First, a nonlinear model of the controlled motor is developed in the Park (d, q)-coordinates. Then, a nonlinear regulator is designed using the backstepping technique. The resulting closed-loop is proved to be asymptotically stable and the motor speed is shown to achieve its ...
A. Magri, F. Giri, A. Abouloifa, M. Haloua   +3 more
openaire   +1 more source

Control of wound-rotor induction motor with rotor impedance variation

Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting, 2002
It is proposed to modify the performance of a three-phase induction motor, fed from a conventional three-phase supply of constant voltage and frequency, by the use of a network of general, slip-dependent impedances connected externally into the secondary circuit, via slip rings.
S. Lesan, W. Shepherd
openaire   +1 more source

Thermal Model and Analysis of Wound-Rotor Induction Machine

IEEE Transactions on Industry Applications, 2012
This paper presents a simplified thermal model for a wound-rotor induction machine. The thermal model is based on lumped parameters, and the analytical equations for their computation are provided in this paper. The procedures for the thermal model setup have been discussed and validated on a 3.8-hp wound rotor machine, comparing the predicted and ...
BOGLIETTI, Aldo, CAVAGNINO, ANDREA, Popescu M., Staton D.   +3 more
openaire   +2 more sources