A5049995796- Electric Motor Design and Analysis
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Superconducting Materials and Applications
- Induction Heating and Inverter Technology
- Refrigeration and Air Conditioning Technologies
- Fluid dynamics and aerodynamics studies
- Advanced DC-DC Converters
- Microgrid Control and Optimization
- Heat Transfer and Optimization
- Conferences and Exhibitions Management
- Academic Writing and Publishing
- Spacecraft and Cryogenic Technologies
- Plasma Diagnostics and Applications
- Innovative Teaching Methods
- Experimental Learning in Engineering
- HVDC Systems and Fault Protection
- Magnetic properties of thin films
- Heat Transfer and Boiling Studies
- Vacuum and Plasma Arcs
- Transcranial Magnetic Stimulation Studies
- Engineering Education and Pedagogy
- Machine Fault Diagnosis Techniques
- Welding Techniques and Residual Stresses
- Motor Control and Adaptation
University of Vermont
2020
The University of Texas at Dallas
2014-2019
Sun Yat-sen University
2014
SYSU-CMU International Joint Research Institute
2014
This paper presents an optimal design for the rotor of a double stator switched reluctance machine. The effect shape on torque profile is analyzed first. Due to nonlinearity magnetic core and complex geometry, iterative approach developed automatically geometry using static finite element method. 12/8/12 prototype optimized. Simulation results validate effectiveness design.
Switched reluctance machines (SRMs) are low cost and fault tolerant alternatives for traction applications. Due to their relatively torque density high ripple, these have not been used in commercialized electrified power trains yet. The double-stator magnetic configuration, where a segmental rotor shared between two stators, is proven superior density, lower acoustic noise, pulsation. SRM (DSSRM) has potential of being the next generation motors since it combines advantages permanent...
This paper proposes a stability optimization method based on virtual resistor and nonunity voltage feedback loop for cascaded dc-dc converters. Oscillating phenomenon or instability would occur occasionally with two more closed-loop converters in series. The are used to modify the instead of only direct improve get rid oscillating behavior. Based analysis distributed parameters, several cases have been derived. After that, relative different cases, modified methods proposed stabilize overall...
This paper proposes a voltage control method based on virtual resistor and proportional feedback loop for cascaded DC-DC converters. The closed-loop converter would act as negative impedance load the front-end might lead to system instability. Based analysis of with distributed parameters, modified strategy is proposed which only add inductor current in block. Thus, no extra power loss be generated. However, under some conditions, this cannot achieve stabilization. Then, an additional output...
This paper proposes a high torque density outer rotor claw pole permanent magnet synchronous motor (CPPMSM). The increased will allow for the development of many low speed actuators without transmission or with small gear ratio, such as robotics and alternators used in automobiles. analytical design method, structure machine well results three dimensional (3D) electromagnetic model ANSYS Maxwell are presented. A complete multi-physics finite element analysis including thermal Moreover, an...
The double‐stator configuration of the switched reluctance machine (SRM) aims to maximise energy conversion efficiency by optimising ratio motional force total magnetic force. Maintaining attractive features SRM, (DSSRM) proves have higher torque/power density than conventional which is a crucial feature for traction applications. original winding used in DSSRM full‐pitch winding, yields high‐power but causes significant heat within machine's end windings. As windings do not take part torque...
This paper compared the effect of full-pitched and tooth windings on performance double stator switched reluctance machines. The main scope research presented here is to obtain higher power/torque density for an existent machine (DSSRM). chosen approach intended reduce amount copper by applying a winding configuration that allows shorter end windings, commonly used full-pitch windings. Magnetic circuit design alterations are introduced effective use single-tooth A considerable reduction...
Switched Reluctance Motors (SRMs) are well known for their resilience and ability to perform under harsh environments. However, these machines still subject common electric machine faults such as short circuit, insulation failure, eccentricity broken bearings. This paper presents a detailed analysis of thermal signatures due inter-turn faults. By comparing simulations copper loss faulty 8/6 SRM, this shows that imaging can be used viable noninvasive method detect circuit
Transcranial magnetic stimulation (TMS) is a non-invasive neuro-stimulation based on the principle of electromagnetic induction that uses brief, strong pulses electric current delivered to coil placed subject's head induce an field in brain. This could stimulate and modulate neural activity. Induced E-field inside brain generated by repetitive TMS (rTMS) can produce changes activity extends beyond period stimulation. Therefore, rTMS be used as probe for exploring higher functions potential...
Traditional core loss estimation is based on the Steinmetz Equation subject to a sinusoidal excitation. The losses are segregated into three parts: hysteresis loss, eddy current and extra loss. information of maximum flux density fundamental frequency thereby neglecting effects harmonics which results in low accuracy. In order consider caused by harmonics, field reconstruction method (FRM) proposed reconstruct laminations. Fast Fourier Transformation (FFT) applied obtain harmonic components...
Switched reluctance machine (SRM) is well known for its simple and robust design as good high speed performance. On the other hand, shortcomings are moderate power/torque density, torque ripple acoustic noise. Having one of simplest mechanical designs, these machines have potential a significant improvement. Accordingly, segmental rotor double stator SRM (DSSRM), which also has shared by two stators, designed to improve performance SRM. Both full pitch or concentrated windings topologies....
Cosoroaba was a research assistant in the Renewable Energy and Vehicular Technology (REVT) Laboratory teaching at UT Dallas.Her expertise lies electric machines design, multiphysics simulations, magnetohydrodynamics its possible use for emission free power generation.
When technologies reach maturity, their energy and power conversion efficiencies can be only improved minimally. Therefore, research efforts need to invested into finding useful applications for losses, thus improving the systems overall consumption. The most common loss manifests itself as waste heat of low-, medium- high temperatures. This paper aims introduce an innovative thermal electric system, using magnetohydrodynamics (MHD) at its core. Determined exceed thermocouples, converter....
Magnetohydrodynamic (MHD) power generation is based on Faraday's law: a magnetic field induces electron movement into passing, conductive fluid. If captured, these electrons are the source of magnetohydrodynamically generated power. Combustion gas and liquid metal (LM) have been used as work fluid in research '60s, but to gain renewable energy properties, gallium circular channel allow use lower temperature thermal main input. This paper focuses detailed description proposed system,...
If you are an undergraduate student and reading this, your first thought is likely to be: "I know a couple of reasons why I shouldn't attend conference." Concerns such as travel participation costs, not being ready publish research, the good old "talking with people really my thing." understand where coming from because I've been there. Well, there's news! The financial research issues easy overcome: volunteer. Conferences need volunteers, organizers usually reward for services free...
Magnetohydrodynamic power generation (MHDG) was a thriving field of research in the 1960s but low efficiency and difficulty to reach desired operating points (high temperature) discouraged investment further efforts matter. Nowadays technological advances such as superconducting electromagnets (with very consumption for higher overall efficiency), electronics (to enable harvesting processing current intensive DC any application), powerful multiphysics simulation software, call reassessment...
Permanent magnet synchronous motors (PMSM) and asynchronous induction (IM) are widely used in the industry for a diverse set of applications. Although use is increasing industrial applications due to cost inconsistency rare earth magnets, PMSM still being because their compact size, high power density, greater efficiency. In interior permanent motor (IPMSM) surface mounted (SPMSM), non-oriented silicon steel core continuous contact with high-energy magnets. This paper focusses on effects...