All Outputs (17)

1.2 kV SiC Wirebond-Less Integrated Low Inductance Module for Automotive Application (2023)
Presentation / Conference Contribution
De Giorgio, M., Li, K., Marchant, S., de Lillo, L., Empringham, L., Serafianos, D., Lea, J., Brockway, S., & Johnson, M. (2023, November). 1.2 kV SiC Wirebond-Less Integrated Low Inductance Module for Automotive Application. Presented at 2023 IEEE 8th Southern Power Electronics Conference and 17th Brazilian Power Electronics Conference (SPEC/COBEP), Florianopolis, Brazil

In this paper, a 1.2 kV wirebond-less Silicon Carbide (SiC) Intelligent Power Module (IPM) designed for automotive applications is presented. This IPM includes integrated decoupling capacitors and gate drivers. By utilizing Printed Circuit Board (PCB... Read More about 1.2 kV SiC Wirebond-Less Integrated Low Inductance Module for Automotive Application.

Development and Validation of a Smart Architecture for Thyristor Valves (2023)
Journal Article
Sala, G., De Bonis, G., Costabeber, A., Tani, A., Johnson, C. M., & Clare, J. C. (2023). Development and Validation of a Smart Architecture for Thyristor Valves. IEEE Journal of Emerging and Selected Topics in Power Electronics, 11(4), 4068-4076. https://doi.org/10.1109/JESTPE.2023.3262344

A high voltage thyristor converter is realized by many valve sections, whose volume is approximately occupied for only the 10% by thyristors and for the 10% by the relevant gate drivers. The remaining 80% is taken by passive auxiliary circuits, neede... Read More about Development and Validation of a Smart Architecture for Thyristor Valves.

Reliability and Characterization of Nanosilver Joints Prepared by a Time-Reduced Sintering Process (2021)
Journal Article
Dai, J., Li, J., Agyakwa, P., Corfield, M., & Johnson, C. M. (2021). Reliability and Characterization of Nanosilver Joints Prepared by a Time-Reduced Sintering Process. IEEE Transactions on Device and Materials Reliability, 21(4), 536-543. https://doi.org/10.1109/TDMR.2021.3118323

This study investigates the power cycling reliability of nanosilver sintered joints formed by a time-reduced sintering process, designed for use on a die bonder. A range of sintering parameters, reflecting different levels of manufacturability, were... Read More about Reliability and Characterization of Nanosilver Joints Prepared by a Time-Reduced Sintering Process.

Optimal Integrated Design of a Magnetically Coupled Interleaved H-Bridge (2021)
Journal Article
Stratta, A., Gottardo, D., Nardo, M. D., Espina, J., Lillo, L. D., Empringham, L., & Johnson, M. C. (2022). Optimal Integrated Design of a Magnetically Coupled Interleaved H-Bridge. IEEE Transactions on Power Electronics, 37(1), 724-737. https://doi.org/10.1109/TPEL.2021.3094025

The application of wide-band gap semiconductors and their integration with other power electronics components (e.g., passives, gate drivers, sensing, thermal management) can meet the growing demand for volume reduction in power electronics systems. T... Read More about Optimal Integrated Design of a Magnetically Coupled Interleaved H-Bridge.

A GaN-HEMT Compact Model Including Dynamic RDSon Effect for Power Electronics Converters (2021)
Journal Article
Li, K., Evans, P. L., Johnson, C. M., Videt, A., & Idir, N. (2021). A GaN-HEMT Compact Model Including Dynamic RDSon Effect for Power Electronics Converters. Energies, 14(8), Article 2092. https://doi.org/10.3390/en14082092

In order to model GaN-HEMT switching transients and determine power losses, a compact model including dynamic RDSon effect is proposed herein. The model includes mathematical equations to represent device static and capacitance-voltage characteristic... Read More about A GaN-HEMT Compact Model Including Dynamic RDSon Effect for Power Electronics Converters.

Shear strength of die attachments prepared using dry nanosilver film by a time-reduced sintering process (2020)
Journal Article
Dai, J., Li, J., Agyakwa, P., Corfield, M., & Johnson, C. M. (2020). Shear strength of die attachments prepared using dry nanosilver film by a time-reduced sintering process. Microelectronics Reliability, 111, Article 113740. https://doi.org/10.1016/j.microrel.2020.113740

This study investigates a time-reduced sintering process for die attachment, prepared, within a processing time of several seconds using dry nanosilver film. The effects of three main sintering parameters, sintering temperature (220 to 300 °C), sinte... Read More about Shear strength of die attachments prepared using dry nanosilver film by a time-reduced sintering process.

Heterogeneous Integration of Magnetic Component Windings on Ceramic Substrates (2020)
Journal Article
Stratta, A., Mouawad, B., Antonini, M., De Lillo, L., Empringham, L., & Johnson, M. C. (2021). Heterogeneous Integration of Magnetic Component Windings on Ceramic Substrates. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(4), 3867-3876. https://doi.org/10.1109/jestpe.2020.2989805

Heterogeneous integration and the converter in package concept have been highlighted as enabling technologies to unlock the full potential of silicon carbide (SiC) and gallium nitride (GaN) devices. Control of parasitic elements in the commutation lo... Read More about Heterogeneous Integration of Magnetic Component Windings on Ceramic Substrates.

Multi‐frequency averaging (MFA) model of a generic electric vehicle powertrain suitable under variable frequency of averaging developed for remote operability (2020)
Journal Article
Sen, S., Evans, P. L., & Johnson, C. M. (2020). Multi‐frequency averaging (MFA) model of a generic electric vehicle powertrain suitable under variable frequency of averaging developed for remote operability. IET Electrical Systems in Transportation, 10(3), 268-274. https://doi.org/10.1049/iet-est.2019.0043

© The Institution of Engineering and Technology 2020. Geographically distributed hardware-in-the-loop (HIL) testing has the potential to allow hybrid vehicle powertrain components (battery, motor drive, and engine) to be developed at geographically r... Read More about Multi‐frequency averaging (MFA) model of a generic electric vehicle powertrain suitable under variable frequency of averaging developed for remote operability.

Accurate Measurement of Dynamic ON-state Resistance of GaN Devices under Reverse and Forward Conduction in High Frequency Power Converter (2020)
Journal Article
Li, K., Videt, A., Idir, N., Evans, P., & Johnson, M. (2020). Accurate Measurement of Dynamic ON-state Resistance of GaN Devices under Reverse and Forward Conduction in High Frequency Power Converter. IEEE Transactions on Power Electronics, 35(9), 9652-9662. https://doi.org/10.1109/TPEL.2019.2961604

Because of trapped charges in GaN transistor structure, device dynamic ON-state resistance RDSon is increased when it is operated in high frequency switched power converters, in which device is possibly operated by zero voltage switching (ZVS) to red... Read More about Accurate Measurement of Dynamic ON-state Resistance of GaN Devices under Reverse and Forward Conduction in High Frequency Power Converter.

Switching Behaviour of GaN-based Power Converter subject to Current-Collapse Effect in Double-Pulse Test (2019)
Presentation / Conference Contribution
Videt, A., Li, K., Pace, L., Idir, N., Evans, P., & Johnson, M. (2019, July). Switching Behaviour of GaN-based Power Converter subject to Current-Collapse Effect in Double-Pulse Test. Poster presented at Centre for Power Electronics Annual Conference 2019, Loughborough, UK

10-kV SiC MOSFET Power Module With Reduced Common-Mode Noise and Electric Field (2019)
Journal Article
DiMarino, C. M., Mouawad, B., Johnson, C. M., Boroyevich, D., & Burgos, R. (2020). 10-kV SiC MOSFET Power Module With Reduced Common-Mode Noise and Electric Field. IEEE Transactions on Power Electronics, 35(6), 6050-6060. https://doi.org/10.1109/tpel.2019.2952633

The advancement of silicon carbide (SiC) power devices with voltage ratings exceeding 10 kV is expected to revolutionize medium- and high-voltage systems. However, present power module packages are limiting the performance of these unique switches. T... Read More about 10-kV SiC MOSFET Power Module With Reduced Common-Mode Noise and Electric Field.

Multi-Frequency Averaging (MFA) Model of Electric-Hybrid Powertrain Suitable for Variable Frequency Operation Applied in Geographically-Distributed Power Hardware-in-the-Loop (GD-PHiL) Simulation (2018)
Presentation / Conference Contribution
Sen, S., Evans, P. L., & Johnson, C. M. (2018, August). Multi-Frequency Averaging (MFA) Model of Electric-Hybrid Powertrain Suitable for Variable Frequency Operation Applied in Geographically-Distributed Power Hardware-in-the-Loop (GD-PHiL) Simulation. Presented at 2018 IEEE Vehicle Power and Propulsion Conference (VPPC), Chicago, IL, USA

© 2018 IEEE Project aims to develop capability for OEMs and suppliers to 'virtually-connect' multiple prototype powertrain components (engine, motor-drive etc.) and engage in real-time system simulation, thereby reducing cost by eliminating co-locati... Read More about Multi-Frequency Averaging (MFA) Model of Electric-Hybrid Powertrain Suitable for Variable Frequency Operation Applied in Geographically-Distributed Power Hardware-in-the-Loop (GD-PHiL) Simulation.

Time-efficient sintering processes to attach power devices using nanosilver dry film (2017)
Presentation / Conference Contribution
Dai, J., Li, J., Agyakwa, P., & Mark Johnson, C. Time-efficient sintering processes to attach power devices using nanosilver dry film. Presented at Conference & Exhibition on High Temperature Electronics Network (HiTEN 2017), Cambridge, UK

Pressure-assisted sintering processes to attach power devices using wet nanosilver pastes with time scales of minutes to a few hours have been widely reported. This paper presents our work on time-efficient sintering, using nanosilver dry film and an... Read More about Time-efficient sintering processes to attach power devices using nanosilver dry film.

Design Tools for Rapid Multidomain Virtual Prototyping of Power Electronic Systems (2015)
Journal Article
Evans, P. L., Castellazzi, A., & Johnson, C. M. (2016). Design Tools for Rapid Multidomain Virtual Prototyping of Power Electronic Systems. IEEE Transactions on Power Electronics, 31(3), 2443-2455. https://doi.org/10.1109/TPEL.2015.2437793

The need for multidisciplinary virtual prototyping in power electronics has been well established, however, design tools capable of facilitating a rapid iterative virtual design process do not exist. A key challenge in developing such tools is identi... Read More about Design Tools for Rapid Multidomain Virtual Prototyping of Power Electronic Systems.

Quantitative Microstructure Characterization of Ag Nanoparticle Sintered Joints for Power Die Attachment (2014)
Journal Article
Wang, Y., Li, J., Agyakwa, P., Johnson, C. M., & Li, S. (2014). Quantitative Microstructure Characterization of Ag Nanoparticle Sintered Joints for Power Die Attachment. Molecular Crystals and Liquid Crystals, 604(1), 11-26. https://doi.org/10.1080/15421406.2014.967647

© 2014 Copyright © Taylor & Francis Group, LLC. The samples of sintered Ag joints for power die attachments were prepared using paste of Ag nanoparticles at 240°C and 5 MPa for 3 to 17 minutes. Their microstructural features were quantitatively cha... Read More about Quantitative Microstructure Characterization of Ag Nanoparticle Sintered Joints for Power Die Attachment.

Calibration of a novel microstructural damage model for wire bonds (2014)
Journal Article
Yang, L., Agyakwa, P., & Johnson, C. (2014). Calibration of a novel microstructural damage model for wire bonds. IEEE Transactions on Device and Materials Reliability, 14(4), 989-994. https://doi.org/10.1109/TDMR.2014.2354739

In a previous paper, a new time-domain damage-based physics model was proposed for the lifetime prediction of wire bond interconnects in power electronic modules. Unlike cycle-dependent life prediction methodologies, this model innovatively incorpora... Read More about Calibration of a novel microstructural damage model for wire bonds.

Automated Fast Extraction of Compact Thermal Models for Power Electronic Modules (2012)
Journal Article
Evans, P. L., Castellazzi, A., & Johnson, C. M. (2013). Automated Fast Extraction of Compact Thermal Models for Power Electronic Modules. IEEE Transactions on Power Electronics, 28(10), 4791-4802. https://doi.org/10.1109/tpel.2012.2236687

Virtual prototyping of power electronic modules aims to allow rapid evaluation of potential designs without the need to resort to building and testing physical prototypes. A key requirement for this process is the ability to quickly generate small, c... Read More about Automated Fast Extraction of Compact Thermal Models for Power Electronic Modules.