Results 81 to 90 of about 13,218 (204)
, 2020 Nowadays, safety boots are necessary and essential to workers in order to avoid harm and injury at a workplace. Safety boots can be defined as a personal protective equipment (PPE) for foot protection at workplace from getting foot injuries caused by ...
Abubakar, Muhammad Umarazizi +2 more
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Internal Model Current Control of Brushless Doubly Fed Induction Machines
Energies, 2018 In the wind energy generation system, the brushless doubly-fed induction machine (BDFIM) has shown significant application potential, since it eliminates the electric brush and slip ring.
Mei Su +4 more
doaj +1 more source
On the variation with flux and frequency of the core loss coefficients in electrical machines [PDF]
, 2006 A model of core losses, in which the hysteresis coefficients are variable with the frequency and induction (flux density) and the eddy-current and excess loss coefficients are variable only with the induction, is proposed. A procedure for identifying the
Dellinger, S.J. +5 more
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Establishing the Relative Merits of Interior and Spoke-Type Permanent-Magnet Machines With Ferrite or NdFeB Through Systematic Design Optimization [PDF]
, 2015 In this paper, a multiobjective design optimization method combining design-of-experiments techniques and differential-evolution algorithms is presented.
Demerdash, Nabeel +3 more
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Brushless doubly-fed machines: Opportunities and challenges [PDF]
Chinese Journal of Electrical Engineering, 2018 The brushless doubly-fed machine(BDFM) is a family of multiport electric machines with two ac electrical ports and a common mechanical port. Different from the conventional singly-fed machines whose synchronous speed is solely determined by a single supply frequency and the actual pole pair number, the BDFM has two supply frequencies and two different ...
openaire +1 more source
Electrical engineering & Electromechanics, 2013 Designing features for valve-engine transducers of brushless synchronous and asynchronized machines are described. Global analysis of research results on the transducer models in a MicroCap circuit simulation system is made, recommendations on the ...
A.M. Galynovskiy
doaj
Improved current-regulated delta modulator for reducing switching frequency and low-frequency current error in permanent magnet brushless AC drives [PDF]
, 2005 The conventional current-regulated delta modulator (CRDM) results in a high current ripple and a high switching frequency at low rotational speeds, and in low-frequency current harmonics, including a fundamental current error, at high rotational speeds ...
Howe, D., Wipasuramonton, P., Zhu, Z.Q.
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IET Electric Power ApplicationsLarge‐capacity superconducting (SC) generators have broad application prospects in offshore wind power. Replacing copper armature windings with higher current‐carrying capacity SC tapes can further increase the power density of the generator.
Yabin Liu +6 more
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Sensored and sensorless speed control methods for brushless doubly fed reluctance motors [PDF]
, 2009 The study considers aspects of scalar V/f control, vector control and direct torque (and flux) control (DTC) of the brushless doubly fed reluctance machine (BDFRM) as a promising cost-effective alternative to the existing technological solutions for ...
Abad +40 more
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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