A5100770930- Electric Motor Design and Analysis
- solar cell performance optimization
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Sensorless Control of Electric Motors
- Magnetic Bearings and Levitation Dynamics
- Anaerobic Digestion and Biogas Production
- Wastewater Treatment and Nitrogen Removal
- Magnetic Properties and Applications
- Photonic and Optical Devices
- Induction Heating and Inverter Technology
- Particle accelerators and beam dynamics
- Semiconductor materials and interfaces
- Advanced Sensor and Energy Harvesting Materials
- Advanced Thermoelectric Materials and Devices
- Biofuel production and bioconversion
- Superconducting Materials and Applications
- Non-Destructive Testing Techniques
- Nanomaterials and Printing Technologies
- Semiconductor Lasers and Optical Devices
- Quantum Dots Synthesis And Properties
- Hybrid Renewable Energy Systems
- Phosphorus and nutrient management
- Engineering Education and Curriculum Development
- Advanced Semiconductor Detectors and Materials
University of Illinois Urbana-Champaign
2019-2025
Institute for Basic Science
2013-2025
University of Alberta
2024
University of Tsukuba
2011-2023
Samsung (South Korea)
2022-2023
GTx (United States)
2018
Keimyung University
2018
Ulsan National Institute of Science and Technology
2015-2017
Jungwon University
2016
Sogang University
2015
Electrohydrodynamic inkjet printing of reduced graphene oxide (RGO) is demonstrated to form complex geometric devices with high resolution (line width ≈ 5 mm). Both planar and highly curved surfaces (radius curvature 60 mm) can be used as substrates. Demonstrations counterfeit coin recognition using RGO patterns all-printed transistors suggest substantial promise for applications in security electronics.
Here we demonstrate fully-integrated, bezel-less transistor arrays using stretchable origami substrates and foldable conducting interconnects. Reversible folding of these is enabled by which are composed rigid support fixtures elastic joints. In addition, hybrid structures thin metal films metallic nanowires worked as interconnects located on the elastomeric
III–V/Si epitaxial tandems with a 1.7-eV GaAsP top cell promise stable power conversion efficiencies above the fundamental limit of Si single-junction cells. However, have suffered from limited minority carrier diffusion length in cell, leading to reduced short-circuit current densities (JSC) and efficiencies. While conventional wisdom dictates that dislocation density must be boost efficiency, here, we show heterointerface design growth sequence also play critical roles reducing...
Brushless permanent magnet DC motors are being manufactured and used increasingly in everything from home appliances to automobiles due their inherent advantages. The merits of these could be enhanced further according another design approach method which alters the typically winding parts for low medium power range motors. This paper deals with high brushless motor traction a 48 V golf cart system. stator is designed segment rectangular copper maximize output within its limited dimensions....
Permanent magnet (PM) synchronous motors (PMSMs) have been used to drive a number of vehicles. They high torque density, efficiency, and wide speed range. However, the cost PMs is disadvantageous. This paper presents technique for increasing density by modifying shape minimizing volume. The PM characteristics such as flux demagnetizing force, energy product, air-gap are represented lumped magnetic equivalent circuit when thickness width increased same volume but with different shapes....
In this study, the losses due to time-harmonic current in a permanent magnet synchronous motor (PMSM) are calculated through co-analysis of time harmonics using space vector pulse width modulation (SVPWM) inverter. PMSM is typically used as control motor. The contains because inverter voltage not sinusoidal, and result, occur. These have negative effect on performance, which vulnerable heat. Therefore, for efficiency performance evaluation PMSM, it necessary consider harmonics. we present...
The interior permanent magnet synchronous motor (IPMSM) is usually applied to the traction in hybrid electric vehicle and due its high-power density wide speed range. In this paper, IPMSM with concentrated winding for a 110 cc motorcycle introduced. Its design was improved high efficiency operation output characteristics were also analyzed according partial magnetic saturation of shoe web many variables. Because affects harmonics eddy current loss magnet, it confirmed that significantly...
The design of a motor with large armature reaction, such as the electric vehicle traction motor, can be implemented using trial-and-error method based on finite element (FEM). base model-design that uses conventional magnetic equivalent circuits is quite inaccurate. To avoid inaccuracy, this study proposes accurately calculates inductance values at practical operating point considering control issue. achieve objective, flux linkage due to current phase angles in each section modeled...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Asymmetric electromagnetic force caused by the frictional worn bearing, rotor misalignment, and unbalanced rotor, etc., leads to an asymmetrical operation, vibration, noise. The need for detection of these eccentricities has lead development monitoring methods increasing sensitivity noise immunity. This paper proposes a diagnosis method induction motor driven PWM-controlled inverter considering...
Lipid-protein complexes are the basis of pulmonary surfactants covering respiratory surface and mediating gas exchange in lungs. Cardiolipin is a mitochondrial lipid overexpressed mammalian lungs infected by bacterial pneumonia. In addition, increased oxygen supply (hyperoxia) pathological factor also critical this paper we fabricate micrometer-size graphene-based sensor to measure permeation through membranes. Combining sensing, X-ray scattering, Atomic Force Microscopy, show that membranes...
Monolithically combining silicon nitride ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi mathvariant="normal">S</mml:mi> mathvariant="normal">i</mml:mi> mathvariant="normal">N</mml:mi> </mml:mrow> mathvariant="normal">x</mml:mi> </mml:msub> </mml:math> ) photonics technology with III-V active devices could open a broad range of on-chip applications spanning wide wavelength <mml:mo>∼</mml:mo>...
A ternary approach in organic photovoltaics (OPVs) is simple and reliable to effectively tune the optical, electrical, morphological properties of photoactive layer for high efficiency as well long-term stability under 1 sun. However, there have been few papers reporting benefits systems recycling energy indoor light, which has narrow emission spectra weak illumination compared outdoor light. In this study, by using two compatible donor polymers (PM7 PM7 D1) with slightly different band gaps...