Results 261 to 270 of about 148,775 (300)

Mathematical model of novel wound-field synchronous motor self-excited by space harmonics

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA), 2014
This paper describes mathematical modeling of a novel wound-field synchronous motor self-excited by space harmonics. The torque equation on the dq-reference frame is investigated to clarify the self-excitation mechanism of the proposed motor. It has been analytically explicated how the motor parameters give influences on the self-excited electromagnet ...
Masahiro Aoyama, Toshihiko Noguchi
openaire   +1 more source

Stray-field loss and flux distribution inside magnetic steel plate under harmonic excitation

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2017
Purpose This paper aims to investigate an efficient approach to model the electromagnetic behaviors and predict stray-field loss inside the magnetic steel plate under 3D harmonic magnetization conditions so as to effectively prevent the structural components from local overheating and insulation damage in electromagnetic devices.
Xiaojun Zhao, Fanhui Meng, Zhiguang Cheng, Lanrong Liu, Junjie Zhang, Chao Fan   +5 more
openaire   +1 more source

Design method for 3rd harmonic excitation system based on computation of electromagnetic field

2007 International Conference on Electrical Machines and Systems (ICEMS), 2007
The magnitude and waveform of harmonic winding voltage in synchronous generator can be calculated by computing electromagnetic field. But the more important problem is how to optimize the design of a generator, so that the harmonic voltage can meet the need of excitation system well.
null Huang Shaogang, null Que Shancai, null Xia Yonghong   +2 more
openaire   +1 more source

Nonlinear optical response induced by a second-harmonic electric-field component concomitant with optical near-field excitation

Physical Review A, 2015
Electron dynamics excited by an optical near field (ONF) in a two-dimensional quantum dot model was investigated by solving a time-dependent Schr\"odinger equation. It was found that the ONF excitation of the electron caused two characteristic phenomena: a two-photon absorption and an induction of a magnetic dipole moment with a strong third-harmonic ...
Maiku Yamaguchi, Katsuyuki Nobusada, Takashi Yatsui   +2 more
openaire   +1 more source

Permanent-magnet-free-synchronous motor with self-excited wound-field technique utilizing space harmonics

2017 IEEE Applied Power Electronics Conference and Exposition (APEC), 2017
This paper describes a permanent-magnet-free synchronous motor where space harmonic power is utilized for the field magnetization instead of permanent magnets. The stator has a three-phase concentrated winding structure, and the rotor has two types of windings, i.e., an induction coil that retrieves mainly the second space harmonic and a field coil for
Masahiro Aoyama, Toshihiko Noguchi
openaire   +1 more source

The third superharmonic resonance of inclined beam subjected to harmonic excitation in temperature field

Proceedings of 2011 International Conference on Electronic & Mechanical Engineering and Information Technology, 2011
Based on nonlinear vibration equation of inclined beam subjected to harmonic excitation in temperature field, the first approximate solution of the 3 superharmonic resonance of the nonlinear vibration system is obtained by means of the method of multiple scales for nonlinear oscillations.
Li Gao-feng, Yang Zhi-an, Xi Xiao-yan
openaire   +1 more source

Multi-Domain Topology Optimization of Pulsed Magnetic Field Generator Sourced by Harmonic Current Excitation

IEEE Transactions on Magnetics, 2012
This paper presents multi-domain topology optimization using a current-carrying coil and a ferromagnetic material in order to focus the pulsed magnetic field (PMF) onto a target area. The multi-domain design sensitivities in the harmonic magnetic field are calculated using the adjoint variable method (AVM).
Jangwon Lee, Junghwan Kook, Semyung Wang
openaire   +1 more source

The theory of the harmonically resonant cavity with a self-excited multiple frequency field

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991
Abstract Usually a harmonically resonant cavity is excited by two different wavelength microwave power sources [C.E. Hess, H.A. Schwettman and T.I. Smith, IEEE Trans. Nucl. Sci. NS-32 (1985) 2924]. According to the theory of interaction of the beam with the cavity [P.B. Wilson, AIP Conf. Proc. no.
Zhao Zhentang, Liu Naiquan, Lin Yuzheng, Tong Dechun   +3 more
openaire   +1 more source

Investigation of Variable Field Harmonic Principle in Hybrid-Excited Switched-Flux Machine

2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia), 2022
Hui Yang, Yanding Bi, Cheng Qian, Dawe Li, Heyun Lin, Z. Q. Zhu, Shuangxia Niu   +6 more
openaire   +1 more source

Prediction of dynamic hysteresis losses under nonsinusoidal exciting field by using neural networks and harmonic analysis

IEEE International Digest of Technical Papers on Magnetics Conference, 2003
Summary form only given. In this paper a simple approach to predict the power losses into a ferromagnetic nucleus when it is excited by a distorted field, H(t) is presented. The aim is also to investigate on the contribute to the losses of each harmonic of the imposed magnetic field.
C. COLTELLI, SALVINI, Alessandro
openaire   +2 more sources