Structure and Operating Performance of a Double Electrical Excitation Synchronous Generator With Embedded Brushless Synchronous Exciter Utilizing DC-Field Excitation

Zhu, Shushu; Zhou, Zhou; Liu, Chuang; Yu, Junyue

doi:10.1109/tec.2021.3096991

Cited by 11 publications

(2 citation statements)

References 30 publications

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“…In conventional radial flux wound excitation generators, the conference [16] proposes a generator in which the armature current and the stator harmonic control winding current jointly generate the excitation power, the former compensating for the weak magnetic effect produced by the armature reaction to keep the load voltage stable. The conference [17] proposes a permanent magnet synchronous generator with three sets of excitation windings, one set on the stator and two sets on the rotor. The excitation winding on the stator generates a magnetic field that produces an AC voltage in the first rotor excitation winding, which is rectified by a diode to provide a DC excitation current to the second rotor excitation winding.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Topology and Electromagnetic Characteristics of Novel Stator Partitioned Axial Flux Disk Generator for Vehicles

Shi

Liu

et al. 2023

IEEE Access

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Internal combustion engines emit high-temperature, high-pressure, and high-speed exhaust gases, resulting in wasted energy and low thermal efficiency. In order to recover the available residual energy in the exhaust gas, this paper proposes a new topology of the disk-type axial flux stator-excited doubly salient generator (AFSDSG) with partitioned stator suitable for high-temperature and high-speed operation. Based on the analysis of the above generator inductance characteristics, the influence mechanism of three pole-slot structures on the induced electromotive force (IEMF) of the armature winding is clarified, the equivalent magnetic circuit method is used to analyze the influence of different winding arrangements on the no-load performance of the generator, and the principles of pole-slot structure optimization and winding arrangement are summarized. The finite element software is used to model and simulate different configuration. After focusing on the analysis of transient characteristics such as inductance, armature winding IEMF, and air-gap flux, it is concluded that different from the conventional pole-slot structure and winding connection method make that only the overlapping area of the stator and the rotor changes linearly can produce a constant voltage, the winding arrangement of Winding Partition Excitation Span 2 has a high IEMF amplitude value and low harmonic content. Finally, the prototype of a three-phase 12/8-pole was trial manufactured and tested. The consistency of the simulation results and experimental results is verified the innovation and feasibility of the new topology proposed in this paper.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Topology and Electromagnetic Characteristics of Novel Stator Partitioned Axial Flux Disk Generator for Vehicles

Shi

Liu

et al. 2023

IEEE Access

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“…In many applications, the 2-level diode/thyristor-based line-commutated rectifiers (LCRs) and voltage-source converters (VSCs) are used as basic building blocks due to the simplicity and reliability of this technology [1], [2]. Such applications include the classic HVDC transmission systems [3]- [5], power systems of vehicles [6], [7], ships and aircraft, induction furnaces [8], excitators of synchronous generators [9]- [11], etc.…”

Section: Introductionmentioning

confidence: 99%

Detailed Parametric Modeling of AC–DC Converters for EMT Simulators

Hosseinian,

Ebrahimi,

Jatskevich

2023

IEEE Open J. Power Electron.

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Detailed switching models (DSM) of ac-dc converters are available in many offline and real-time electromagnetic transient (EMT) simulation programs. However, such discrete models typically require small simulation time steps for accurately handling the switching events without interpolation. This paper proposes a new parametric modeling approach for line-commutated and 2-level voltage-source ac-dc converters. The proposed methodology is based on parametric functions that relate ac and dc variables in the instantaneous sense, which allows the reconstruction of the waveforms of voltages and currents (with the same of details as the switching models of converters) without topological changes in the converter circuit. Thus, it can operate at larger time steps without requiring interpolation, thereby enhancing simulation efficiency. The computational advantages of the proposed models over the conventional switching models are demonstrated in offline PSCAD and real-time RTDS NovaCor simulators in terms of maximum possible time step size and accuracy. It is shown that the proposed models can accurately run with much larger time steps (up to ~200 μs for LCRs, and up to ~50 μs for VSCs) compared to detailed switching models, which are limited to relatively small time steps of ~10 μs.

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A review of hydro-turbine unit rotor system dynamic behavior: Multi-field coupling of a three-dimensional model

Cao,

Luo,

Shi

et al. 2024

Physics of Fluids

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The dynamic behavior of hydro-turbine rotor system is a complex multi-field and nonlinear problem, which has been studied by many researchers. The analysis of the rotor system dynamic characteristics is usually carried out based on the behavior analysis of bearings, hydraulics, electromagnetics, etc., while the thermo-elasto-hydrodynamic characteristics of bearings are extremely important to numerical accuracy. Therefore, this paper first summarizes the research progress in bearing lubrication performance, and further summarizes the research on hydro-turbine rotor system dynamic characteristics, including the modal characteristics and dynamic response characteristics. Finally, this paper summarizes the main research progress of the hydro-turbine rotor system and proposes possible directions in future research. Literature review shows that the hydro-turbine runners and bearings have achieved multi-field coupling analysis of three-dimensional (3D) models, and some work on multi-field coupling of rotor systems has been carried out. The transition of 3D multi-field coupling from single component to rotor system is significant to accurately predict the rotor system dynamic characteristics and the solution of engineering problems, which requires further in-depth research on the multi-field coupling theory, numerical methods, 3D model integrity, simulation software, etc., and the spatiotemporal synergy between multi-fields should be fully considered.

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Structure and Operating Performance of a Double Electrical Excitation Synchronous Generator With Embedded Brushless Synchronous Exciter Utilizing DC-Field Excitation

Cited by 11 publications

References 30 publications

Analysis of the Topology and Electromagnetic Characteristics of Novel Stator Partitioned Axial Flux Disk Generator for Vehicles

Analysis of the Topology and Electromagnetic Characteristics of Novel Stator Partitioned Axial Flux Disk Generator for Vehicles

Detailed Parametric Modeling of AC–DC Converters for EMT Simulators

A review of hydro-turbine unit rotor system dynamic behavior: Multi-field coupling of a three-dimensional model

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