Results 11 to 20 of about 6,999 (231)
Energies, 2020 Aiming at the problems of large excitation loss and low power generation efficiency of silicon rectifier generators and the unstable output voltage of permanent magnet (PM) generators, a hybrid excitation generator (HEG) with suspended brushless claw ...
Huihui Geng +8 more
doaj +3 more sources
Smart Solutions: A New Direct Current Electric Machine Design to Reduce Weight and Enhance Efficiency. [PDF]
Glob ChallThis article introduces a smart solution for the design of a brush DC motor with a winding‐free rotor (DCFR). The proposed model simplifies manufacturing, reduces material costs, and enhances efficiency. Designed for variable speed and solar power applications, the DCFR achieves 91.8% efficiency and a 21% weight reduction compared to conventional ...
Ivliev D +5 more
europepmc +2 more sources
Analysis of a Brushless Wound Rotor Synchronous Machine Employing a Stator Harmonic Winding
IEEE Access, 2020 This study proposes a new topology for brushless operation of a wound rotor synchronous machine (WRSM) employing a stator harmonic winding. It is based on generating an additional six-pole magneto-motive force component without the use of an inverter. In
Ghulam Jawad Sirewal +3 more
doaj +1 more source
Journal of Electrical and Computer Engineering, 2021 Aiming at the problem of uncontrollable magnetic field of permanent magnet generators, a new hybrid excitation generator (HEG) with parallel magnetic circuit is proposed.
Wenjing Hu +5 more
doaj +1 more source
A new sensorless method for switched reluctance motor drives [PDF]
, 1998 This paper describes a new method for indirect sensing of the rotor position in switched reluctance motors (SRMs) using pulse width modulation voltage control.
Gallegos-Lopez, G. +2 more
core +1 more source
Influence of design parameters on the starting torque of a single-phase PM brushless DC motor [PDF]
, 2000 The starting torque of a single-phase permanent magnet brushless DC motor is investigated, for both radial and parallel magnetization. Finite element analysis is used to assess the relative merits of alternative methods of introducing the required air ...
Bentouati, S., Howe, D., Zhu, Z.Q.
core +1 more source
Assessment of torque components in brushless permanent-magnet machines through numerical analysis of the electromagnetic field [PDF]
, 2005 For the calculation of torque in brushless (BL) alternating current motors a local method is proposed, based on the Maxwell stress theory and the filtered contributions due to the harmonics of the magnetic vector potential in the motor air gap.
Dellinger, S.J. +4 more
core +1 more source
IET Electric Power Applications, 2023 A new de‐excitation system for advanced brushless excitation based on a synchronous generator is presented. The proposed system uses a discharge resistor in series with a freewheeling diode of a buck chopper.
Gildas Martial Ngaleu +4 more
doaj +1 more source
Improving ungated steady-state cardiac perfusion using transition bands. [PDF]
Magn Reson MedAbstract 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 +5 more
europepmc +2 more sources
PM fractional machines adopting bonded magnets: effect of different magnetizations on the energetic performance [PDF]
, 2012 The adoption of Permanent Magnets in small brushless machines for automotive applications is becoming frequent. Some research on bonded magnets is being carried on to substitute the ferrites.
Ferraris, Luca +3 more
core +1 more source