Outputs (14)

Design-of-Experiments Analysis of Li-Ion Cell Capacity Fading in High Temperature Automotive Conditions (2019)
Conference Proceeding
Stocker, R., Mumtaz, A., & Lophitis, N. (2019). Design-of-Experiments Analysis of Li-Ion Cell Capacity Fading in High Temperature Automotive Conditions. In 2019 Electric Vehicles International Conference (EV) (1-6). https://doi.org/10.1109/EV.2019.8893026

This paper examines the evolution of performance degradation through capacity fade in Li-ion cells when subjected to 8 months of automotive drive cycles in high temperature conditions. This is done by combining a temperature controlled, highly transi... Read More about Design-of-Experiments Analysis of Li-Ion Cell Capacity Fading in High Temperature Automotive Conditions.

Considering Li-Ion Battery Cell Ageing in Automotive Conditions (2019)
Report
Stocker, R., Mathur, P., Mumtaz, A., & Lophitis, N. (2019). Considering Li-Ion Battery Cell Ageing in Automotive Conditions. HORIBA

This paper explores how to understand and use knowledge of cell ageing in automotive conditions. The key problems and considerations of ageing are considered, followed by an explanation of their causes. This is then used to discuss the tools and unde... Read More about Considering Li-Ion Battery Cell Ageing in Automotive Conditions.

Experimental Investigation and Verification of Traps affecting the performance of 3C-SiC-on-Si Schottky Barrier Diodes (2019)
Conference Proceeding
Arvanitopoulos, A., Li, F., Jennings, M. R., Perkins, S., Gyftakis, K. N., Antoniou, M., …Lophitis, N. (2019). Experimental Investigation and Verification of Traps affecting the performance of 3C-SiC-on-Si Schottky Barrier Diodes. In ECCE 2019: IEEE Energy Conversion Congress and Expo (1941-1947). https://doi.org/10.1109/ECCE.2019.8912232

Monolithic integration of wide bandgap (WBG) devices for power integrated circuits is currently of increased interest. The ability of the cubic phase (3C-) of Silicon Carbide (SiC) to grow heteroepitaxially on Silicon (Si) substrates (3C- SiC-on-Si)... Read More about Experimental Investigation and Verification of Traps affecting the performance of 3C-SiC-on-Si Schottky Barrier Diodes.

A Defects-Based Model on the Barrier Height Behavior in 3C-SiC-on-Si Schottky Barrier Diodes (2019)
Journal Article
Arvanitopoulos, A. E., Antoniou, M., Jennings, M. R., Perkins, S., Gyftakis, K. N., Mawby, P., & Lophitis, N. (2020). A Defects-Based Model on the Barrier Height Behavior in 3C-SiC-on-Si Schottky Barrier Diodes. IEEE Journal of Emerging and Selected Topics in Power Electronics, 8(1), 54-65. https://doi.org/10.1109/JESTPE.2019.2942714

3C-silicon carbide (3C-SiC) Schottky barrier diodes (SBDs) on silicon (Si) substrates (3C-SiC-on-Si) have been found to suffer from excessive subthreshold current, despite the superior electrical properties of 3C-SiC. In turn, that is one of the fact... Read More about A Defects-Based Model on the Barrier Height Behavior in 3C-SiC-on-Si Schottky Barrier Diodes.

Frequency Extraction of Current Signal Spectral Components: A New Tool for the Detection of Rotor Electrical Faults in Induction Motors (2019)
Conference Proceeding
Panagiotou, P. A., Arvanitakis, I., Lophitis, N., & Gyftakis, K. N. (2019). Frequency Extraction of Current Signal Spectral Components: A New Tool for the Detection of Rotor Electrical Faults in Induction Motors. In Proceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED) (290-296). https://doi.org/10.1109/DEMPED.2019.8864893

This work expands the classical current signature analysis in induction machines in a two-stage spectral decomposition manner. The proposed methodology can be summarized in two main steps: initially, the current signals are analyzed using a time freq... Read More about Frequency Extraction of Current Signal Spectral Components: A New Tool for the Detection of Rotor Electrical Faults in Induction Motors.

On the robustness of ultra-high voltage 4H-SiC IGBTs with an optimized retrograde p-well (2019)
Conference Proceeding
Tiwari, A. K., Perkins, S., Lophitis, N., Antoniou, M., Trajkovic, T., & Udrea, F. (2019). On the robustness of ultra-high voltage 4H-SiC IGBTs with an optimized retrograde p-well. In Proceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED) (351-357). https://doi.org/10.1109/DEMPED.2019.8864804

The robustness of ultra-high voltage (>10kV) SiC IGBTs comprising of an optimized retrograde p-well is investigated. Under extensive TCAD simulations, we show that in addition to offering a robust control on threshold voltage and eliminating punch-th... Read More about On the robustness of ultra-high voltage 4H-SiC IGBTs with an optimized retrograde p-well.

Viable 3C-SiC-on-Si MOSFET design disrupting current Material Technology Limitations (2019)
Conference Proceeding
Arvanitopoulos, A., Antoniou, M., Li, F., Jennings, M. R., Perkins, S., Gyftakis, K. N., & Lophitis, N. (2019). Viable 3C-SiC-on-Si MOSFET design disrupting current Material Technology Limitations. In Proceedings of the 2019 IEEE 12th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED) (364 -370). https://doi.org/10.1109/DEMPED.2019.8864910

The cubic polytype (3C-) of Silicon Carbide (SiC) is an emerging semiconductor technology for power devices. The featured isotropic material properties along with the Wide Band Gap (WBG) characteristics make it an excellent choice for power Metal Oxi... Read More about Viable 3C-SiC-on-Si MOSFET design disrupting current Material Technology Limitations.

Performance Improvement of >10kV SiC IGBTs with Retrograde p-Well (2019)
Conference Proceeding
Tiwari, A. K., Antoniou, M., Lophitis, N., Perkins, S., Trajkovic, T., Trajkovic, T., & Udrea, F. (2019). Performance Improvement of >10kV SiC IGBTs with Retrograde p-Well. In P. M. Gammon, V. A. Shah, R. A. McMahon, M. R. Jennings, O. Vavasour, P. A. Mawby, & F. Padfield (Eds.), Proceedings of 12th European Conference on Silicon Carbide and Related Materials (ECSCRM 2018) (639-642). https://doi.org/10.4028/www.scientific.net/MSF.963.639

A p-well consisting of a retrograde doping profile is investigated for performance improvement of >10kV SiC IGBTs. The retrograde p-well, which can be realized using low-energy shallow implants, effectively addresses the punch-through, a common issue... Read More about Performance Improvement of >10kV SiC IGBTs with Retrograde p-Well.

On the broken rotor bar diagnosis using time-frequency analysis: 'Is one spectral representation enough for the characterisation of monitored signals?' (2019)
Journal Article
Panagiotou, P., Arvanitakis, I., Lophitis, N., Antonino-Daviu, {. A., & Gyftakis, {. N. (2019). On the broken rotor bar diagnosis using time-frequency analysis: 'Is one spectral representation enough for the characterisation of monitored signals?'. IET Electric Power Applications, 13(7), 932-942. https://doi.org/10.1049/iet-epa.2018.5512

© 2019 Institution of Engineering and Technology. All rights reserved. This work enhances the knowledge of the diagnostic potential of the broken bar fault in induction motors. Since a series of studies have been published over the years regarding co... Read More about On the broken rotor bar diagnosis using time-frequency analysis: 'Is one spectral representation enough for the characterisation of monitored signals?'.

FEM approach for diagnosis of induction machines' non-adjacent broken rotor bars by short-time Fourier transform spectrogram (2019)
Journal Article
Panagiotou, P., Arvanitakis, I., Lophitis, N., Antonino-Daviu, {. A., & Gyftakis, {. N. (2019). FEM approach for diagnosis of induction machines' non-adjacent broken rotor bars by short-time Fourier transform spectrogram. Journal of Engineering, 2019(17), 4566--4570. https://doi.org/10.1049/joe.2018.8240

Rotor electrical faults are an issue frequently encountered when applying condition monitoring and fault diagnosis on induction machines. The detection via the analysis of the stator current becomes challenging when the rotor cage suffers from multip... Read More about FEM approach for diagnosis of induction machines' non-adjacent broken rotor bars by short-time Fourier transform spectrogram.

Retrograde p-well for 10-kv class sic igbts (2019)
Journal Article
Tiwari, A. K., Antoniou, M., Lophitis, N., Perkin, S., Trajkovic, T., & Udrea, F. (2019). Retrograde p-well for 10-kv class sic igbts. IEEE Transactions on Electron Devices, 66(7), 3066-3072. https://doi.org/10.1109/TED.2019.2918008

In this paper, we propose the use of a retrograde doping profile for the p-well for ultrahigh voltage (>10 kV) SiC IGBTs. We show that the retrograde p-well effectively addresses the punchthrough issue, whereas offering a robust control over the gate... Read More about Retrograde p-well for 10-kv class sic igbts.

On the suitability of 3C-Silicon carbide as an alternative to 4H-silicon carbide for power diodes (2019)
Journal Article
Arvanitopoulos, A. E., Antoniou, M., Perkins, S., Jennings, M., Guadas, M. B., Gyftakis, K. N., & Lophitis, N. (2019). On the suitability of 3C-Silicon carbide as an alternative to 4H-silicon carbide for power diodes. IEEE Transactions on Industry Applications, 55(4), 4080-4090. https://doi.org/10.1109/TIA.2019.2911872

Major recent developments in growth expertise related to the cubic polytype of Silicon Carbide, the 3C-SiC, coupled with its remarkable physical properties and the low fabrication cost, suggest that within the next years, 3C-SiC devices can become a... Read More about On the suitability of 3C-Silicon carbide as an alternative to 4H-silicon carbide for power diodes.

A New Approach for Broken Rotor Bar Detection in Induction Motors Using Frequency Extraction in Stray Flux Signals (2019)
Journal Article
Panagiotou, P. A., Arvanitakis, I., Lophitis, N., Antonino-Daviu, J. A., & Gyftakis, K. N. (2019). A New Approach for Broken Rotor Bar Detection in Induction Motors Using Frequency Extraction in Stray Flux Signals. IEEE Transactions on Industry Applications, 55(4), 3501-3511. https://doi.org/10.1109/TIA.2019.2905803

This paper offers a reliable solution to the detection of broken rotor bars in induction machines with a novel methodology, which is based on the fact that the fault-related harmonics will have oscillating amplitudes due to the speed ripple effect. T... Read More about A New Approach for Broken Rotor Bar Detection in Induction Motors Using Frequency Extraction in Stray Flux Signals.

Deep p-Ring Trench Termination: An Innovative and Cost-Effective Way to Reduce Silicon Area (2019)
Journal Article
Antoniou, M., Lophitis, N., Udrea, F., Rahimo, M., Vemulapati, U., Corvasce, C., & Badstuebner, U. (2019). Deep p-Ring Trench Termination: An Innovative and Cost-Effective Way to Reduce Silicon Area. IEEE Electron Device Letters, 40(2), 177-180. https://doi.org/10.1109/LED.2018.2890702

© 1980-2012 IEEE. A new type of high-voltage termination, namely the 'deep p-ring trench' termination design for high-voltage, high-power devices, is presented and extensively simulated. Termination of such devices consumes a large proportion of the... Read More about Deep p-Ring Trench Termination: An Innovative and Cost-Effective Way to Reduce Silicon Area.