Results 41 to 50 of about 984 (220)

Dual-Inverter-Controlled Brushless Operation of Wound Rotor Synchronous Machines Based on an Open-Winding Pattern

Energies, 2020
In an open-winding machine, three-phase stator currents can be controlled such that the input armature currents may contain the third-harmonic current component in addition to the fundamental.
Syed Sabir Hussain Bukhari, Ghulam Jawad Sirewal, Faheem Akhtar Chachar, Jong-Suk Ro   +3 more
doaj   +1 more source

Model-Based Field Winding Interturn Fault Detection Method for Brushless Synchronous Machines

Machines, 2022
The lack of available measurements makes the detection of electrical faults in the rotating elements of brushless synchronous machines particularly challenging. This paper presents a novel and fast detection method regarding interturn faults at the field
Kumar Mahtani, José M. Guerrero, Luis F. Beites, Carlos A. Platero   +3 more
doaj   +1 more source

16,000-RPM Interior Permanent Magnet Reluctance Machine with Brushless Field Excitation [PDF]

, 2007
Introduction to Brushless field excitation(BFE) to overcome the drawbacks of Reluctance Interior Permanent Magnet (RIPM)
Coomer, Chester, Lee, Seong T., Burress, Timothy A., Lee, S. T., Adams, Donald J., Burress, T. A., Adams, D. J., Wiles, Randy H., Coomer, C. L., Wiles, R. H., Hsu, John S., McKeever, John W., Hsu, J. S., McKeever, J.W.   +13 more
core   +1 more source

Novel Single Inverter-Controlled Brushless Wound Field Synchronous Machine Topology

Mathematics, 2021
This paper proposes a novel brushless excitation topology for a three-phase synchronous machine based on a customary current-controlled voltage source inverter (VSI).
Syed Sabir Hussain Bukhari, Ali Asghar Memon, Sadjad Madanzadeh, Ghulam Jawad Sirewal, Jesús Doval-Gandoy, Jong-Suk Ro   +5 more
doaj   +1 more source

Improving ungated steady-state cardiac perfusion using transition bands. [PDF]

Magn Reson Med
Abstract Purpose Although gated first‐pass contrast‐enhanced sequences are the clinical standard for cardiovascular MR perfusion, some patient conditions necessitate using ungated steady‐state sequences. However, through‐plane cardiac motion and blood flow into the left ventricle can disrupt the magnetization steady state of the tissue, and perfusion ...
Mendes JK, Le JV, Arai AE, Ranjan R, DiBella EVR, Adluru G.   +5 more
europepmc   +2 more sources

Regulador de tensão para sistemas de excitação brushless – desenvolvimento e aplicação [PDF]

, 2023
The main objective of this dissertation is to present the development of an automatic voltage regulator for brushless excitation system. The brushless excitation of synchronous machine is an attractive solution for problems related to slip rings ...
GALVÃO JUNIOR, Francisco João Di Mase
core  

A Review on the Control of Magnetless Inductive Rotary Transformer-Based Excitation Systems

IEEE Access
Magnetless rotary transformer excitation systems enable fully brushless operation of electrically excited synchronous machines (EESMs) and offer a scalable alternative to permanent-magnet drives.
Saleh Abdusalam Ali, Farshid Mahmouditabar, Volker Pickert, Shafiq Odhano, Muhammad Rizwan Awan, Zepeng Liu   +5 more
doaj   +1 more source

Design Method for Variable Frequency Brushless Synchronous Generators

Energies, 2022
Brushless synchronous generators, which have the structure of three-stage generators to realize brushless excitation, are the most commonly used aero-generators.
Yongjie Wang, Huizhen Wang, Weifeng Liu, Qin Wang, Xing Zhao   +4 more
doaj   +1 more source

Simulation of Outer Rotor Permanent Magnet Brushless DC Motor Using Finite Element Method for Torque Improvement

Modelling and Simulation in Engineering, 2012
A method of simulation and modeling outer rotor permanent magnet brushless DC (ORPMBLDC) motor under dynamic conditions using finite element method by FEMM 4.2 software package is presented.
Uma Devi Kumaravelu, Sanavullah Mohamed Yakub   +1 more
doaj   +1 more source

Brushless Field Excitation Scheme for Wound Field Synchronous Machines

Applied Sciences, 2020
A new harmonic field excitation technique for the brushless operation of wound field synchronous machines (WFSMs) is proposed in this paper. The proposed scheme involves conventional three-phase and single-phase inverters operating at different ...
Syed Sabir Hussain Bukhari, Ghulam Jawad Sirewal, Faheem Akhtar Chachar, Jong-Suk Ro   +3 more
doaj   +1 more source