All Outputs (160)

Fluid flow and heat transfer analysis of TEFC machine end regions using more realistic end-winding geometry (2018)
Conference Proceeding
La Rocca, S., Pickering, S., Eastwick, C. N., Gerada, C., & Rönnberg, K. (2018). Fluid flow and heat transfer analysis of TEFC machine end regions using more realistic end-winding geometry.

In this paper a typical small low voltage TEFC motor (output power ~10 kW) has been studied using computational fluid dynamics. The complexity of the end winding geometries, often consisting of several insulated copper strands bound together, provide... Read More about Fluid flow and heat transfer analysis of TEFC machine end regions using more realistic end-winding geometry.

An advanced modulation scheme emphasising neutral point ripple suppression using predictive control for three-level NPC converters in aircraft electric starter generator applications (2018)
Conference Proceeding
Li, C., Yang, T., Lo Calzo, G., Bozhko, S., Gerada, C., & Wheeler, P. (2018). An advanced modulation scheme emphasising neutral point ripple suppression using predictive control for three-level NPC converters in aircraft electric starter generator applications.

Electrical starter/generator (ESG) system is one of the key innovations of more-electric aircraft initiative. The ESG cranks the engine and accelerates it up to self-sustained speed using electric energy (starter mode) and then runs as a generator to... Read More about An advanced modulation scheme emphasising neutral point ripple suppression using predictive control for three-level NPC converters in aircraft electric starter generator applications.

GaN HEMT gate-driver for achieving high power converter integration levels (2018)
Conference Proceeding
Wu, H., Garcia, J., & Castellazzi, A. (2018). GaN HEMT gate-driver for achieving high power converter integration levels.

This work proposes a solution for implementing an isolated gate driver for GaN HEMTs based on the previous topology for SiC power MOSFETs. The isolation of the gate driver is realised by the single transformer topology with double winding in the sec... Read More about GaN HEMT gate-driver for achieving high power converter integration levels.

Static and dynamic TSEPs of SiC and GaN transistors (2018)
Conference Proceeding
Zhu, S., Fayyaz, A., & Castellazzi, A. (2018). Static and dynamic TSEPs of SiC and GaN transistors.

This paper investigates the static and dynamic temperature sensitive electrical parameters (TSEPs) for both SiC and GaN transistors. It is shown that both the qualitative and quantitative temperature characteristics of these parameters are various wh... Read More about Static and dynamic TSEPs of SiC and GaN transistors.

Next generation integrated drive: a novel thermal and electrical integration technique for high power density converters used in automotive drive systems (2018)
Conference Proceeding
Ahmadi, B., Espina, J., De Lillo, L., Abebe, R., Empringham, L., & Johnson, C. M. (2018). Next generation integrated drive: a novel thermal and electrical integration technique for high power density converters used in automotive drive systems.

In this paper, an innovative method of electro-thermal integration of a drive system is presented. Important challenges of this integration consist of, firstly coupled thermal design of switching power modules and PM electric motor and secondly integ... Read More about Next generation integrated drive: a novel thermal and electrical integration technique for high power density converters used in automotive drive systems.

Model predictive control for Active-Bridge-Active-Clamp (ABAC) converter (2018)
Conference Proceeding
Chen, L., Tarisciotti, L., Costabeber, A., Gottardo, D., Zanchetta, P., & Wheeler, P. (2018). Model predictive control for Active-Bridge-Active-Clamp (ABAC) converter.

The Dual-Active-Bridge is a well-established isolated, bidirectional DC/DC topology suitable for applications where high efficiency, galvanic isolation and large voltage conversion ratios are required. However, in low voltage high power cases, the ou... Read More about Model predictive control for Active-Bridge-Active-Clamp (ABAC) converter.

Performance improvement of the CFM56-3 aircraft engine by electric power transfer (2018)
Conference Proceeding
Enalou, H. B., & Bozhko, S. (2018). Performance improvement of the CFM56-3 aircraft engine by electric power transfer. In Proceedings of 13th European Conference on Turbomachinery Fluid dynamics & Thermodynamics (ETC13)

With the design trends towards the More Electric Engine (MEE) for the More Electric Aircraft (MEA), areas for novel technologies can be pinpointed for multi-spool engines, introducing remarkable improvements to push the boundaries of propulsion techn... Read More about Performance improvement of the CFM56-3 aircraft engine by electric power transfer.

Comparative Thermal and Structural Characterization of Sintered Nano-Silver and High-Lead Solder Die Attachments During Power Cycling (2018)
Journal Article
Dai, J., Li, J., Agyakwa, P., Corfield, M., & Johnson, C. M. (2018). Comparative Thermal and Structural Characterization of Sintered Nano-Silver and High-Lead Solder Die Attachments During Power Cycling. IEEE Transactions on Device and Materials Reliability, 18(2), 256-265. https://doi.org/10.1109/TDMR.2018.2825386

13.5 mm × 13.5 mm sintered nano-silver attachments for power devices onto AlN substrates were prepared at 250 ºC and a pressure of 10MPa for 5 minutes and compared with Pb5Sn solder joint die attachments under constant current power cycling with an i... Read More about Comparative Thermal and Structural Characterization of Sintered Nano-Silver and High-Lead Solder Die Attachments During Power Cycling.

Single Phase Energy Management System Operating in Islanding Mode with Repetitive Control and Active Damping (2018)
Journal Article
Julian, A. L., Oriti, G., Ji, C., & Zanchetta, P. (2018). Single Phase Energy Management System Operating in Islanding Mode with Repetitive Control and Active Damping. IEEE Transactions on Industry Applications, 54(5), 5163-5172. https://doi.org/10.1109/tia.2018.2825249

This paper presents a novel digital control strategy for the islanding mode operation of a power electronics based energy management system (EMS). Thanks to the use of a high performance repetitive controller combined with active damping, the EMS is... Read More about Single Phase Energy Management System Operating in Islanding Mode with Repetitive Control and Active Damping.

Device loss model of a fully SiC based dual active bridge considering the effect of synchronous rectification and deadtime (2018)
Conference Proceeding
Wang, Z., & Castellazzi, A. (2018). Device loss model of a fully SiC based dual active bridge considering the effect of synchronous rectification and deadtime. In Proceedings - 2017 IEEE Southern Power Electronics Conference (SPEC) (1-7). https://doi.org/10.1109/SPEC.2017.8333662

It is becoming a great interest to employ SiC based power devices in dual active bridge (DAB) converter as an alternative to conventional Si-IGBT, due to its higher switching frequency potential, smaller switching losses as well as the capability to... Read More about Device loss model of a fully SiC based dual active bridge considering the effect of synchronous rectification and deadtime.

Operation principles of quasi Z-source modular multilevel converters (2018)
Conference Proceeding
Khera, F. A., Klumpner, C., & Wheeler, P. W. (2018). Operation principles of quasi Z-source modular multilevel converters. In Proceedings 2017 IEEE Southern Power Electronics Conference (SPEC) (1-6). https://doi.org/10.1109/SPEC.2017.8333617

This paper proposes the integration of a quasi Z-source network with a modular multilevel converter (MMC) to provide voltage boost capability. The proposed quasi-Z-source MMC uses two symmetrical networks of inductors and capacitors connected between... Read More about Operation principles of quasi Z-source modular multilevel converters.

Modulated predictive control for indirect matrix converter (2018)
Journal Article
Tarisciotti, L., Lei, J., Formentini, A., Trentin, A., Zanchetta, P., Wheeler, P., & Rivera, M. (in press). Modulated predictive control for indirect matrix converter. IEEE Transactions on Industry Applications, https://doi.org/10.1109/TIA.2017.2699666

Finite State Model Predictive Control (MPC) has been recently applied to several converter topologies as it can provide many advantages over other MPC techniques. The advantages of MPC include fast dynamics, multi-target control capability and relati... Read More about Modulated predictive control for indirect matrix converter.

Design and losses analysis of a high power density machine for flooded pump applications (2018)
Journal Article
Al-Timimy, A., Giangrande, P., Degano, M., Zeyuan, X., Galea, M., Gerada, C., …Xia, L. (2019). Design and losses analysis of a high power density machine for flooded pump applications. IEEE Transactions on Industry Applications, 54(4), 3260-3270. https://doi.org/10.1109/TIA.2018.2821623

This paper describes the design process of a 10 kW 19000 rpm high power density surface mounted permanent magnet synchronous machine for a directly coupled pump application. In order to meet the required specifications, a compact machine, with coolin... Read More about Design and losses analysis of a high power density machine for flooded pump applications.

Generic functional modelling of multi-pulse auto-transformer rectifier units for more-electric aircraft applications (2018)
Journal Article
Yang, T., Bozhko, S., Wheeler, P., Wang, S., & Wu, S. (2018). Generic functional modelling of multi-pulse auto-transformer rectifier units for more-electric aircraft applications. Chinese Journal of Aeronautics, 31(5), 883-891. https://doi.org/10.1016/j.cja.2018.03.010

The Auto-Transformer Rectifier Unit (ATRU) is one preferred solution for high-power AC/DC power conversion in aircraft. This is mainly due to its simple structure, high reliability and reduced kVA ratings. Indeed, the ATRU has become a preferred AC/D... Read More about Generic functional modelling of multi-pulse auto-transformer rectifier units for more-electric aircraft applications.

Design and testing of electromechanical actuator for aerospace applications (2018)
Conference Proceeding
Papini, L., Connor, P., Patel, C., Empringham, L., Gerada, C., & Wheeler, P. (2018). Design and testing of electromechanical actuator for aerospace applications. In 2018 25th International Workshop on Electric Drives: Optimization in Control of Electric Drives (IWED2018) - Proceedings (1-6). https://doi.org/10.1109/IWED.2018.8321392

Electromechanical actuators are gaining interest in the aerospace industry within the More Electrical Aircraft (MEA) architecture. The end-goal of fully electric aircraft includes Electromechanical actuation for flight control systems. The design and... Read More about Design and testing of electromechanical actuator for aerospace applications.

Comparison of thermal and reliability performance between a SiC MOSFET module with embedded decoupling capacitors and commercial Si IGBT power modules (2018)
Conference Proceeding
Yang, L., Agyakwa, P., Corfield, M., Johnson, M., Harris, A., Packwood, M., & Paciura, K. (2018). Comparison of thermal and reliability performance between a SiC MOSFET module with embedded decoupling capacitors and commercial Si IGBT power modules.

This paper characterizes thermal and reliability performance of a SiC MOSFET power module with embedded decoupling capacitors and without anti-parallel diodes. Active and passive temperature cycling, supported by transient thermal impedance character... Read More about Comparison of thermal and reliability performance between a SiC MOSFET module with embedded decoupling capacitors and commercial Si IGBT power modules.

Impact of underfill and other physical dimensions on Silicon Lateral IGBT package reliability using computer model with discrete and continuous design variables (2018)
Journal Article
Rajaguru, P., Lu, H., Bailey, C., Castellazzi, A., Pathirana, V., Udugampola, N., & Udrea, F. (2018). Impact of underfill and other physical dimensions on Silicon Lateral IGBT package reliability using computer model with discrete and continuous design variables. Microelectronics Reliability, 83, 146-156. https://doi.org/10.1016/j.microrel.2018.02.024

An effort to design and build a prototype LED driver system which is energy efficient, highly compact and with few component count was initiated by a consortium UK universities. The prototype system will be based on Silicon Lateral IGBT (LIGBT) devic... Read More about Impact of underfill and other physical dimensions on Silicon Lateral IGBT package reliability using computer model with discrete and continuous design variables.

Comparison of power cycling reliability of flexible PCB interconnect smaller/thinner and larger/thicker power devices with topside Sn-3.5Ag solder joints (2018)
Journal Article
Li, J., Dai, J., & Johnson, C. M. (2018). Comparison of power cycling reliability of flexible PCB interconnect smaller/thinner and larger/thicker power devices with topside Sn-3.5Ag solder joints. Microelectronics Reliability, 84, 55-65. https://doi.org/10.1016/j.microrel.2018.03.013

The power cycling reliability of flexible printed circuit board (PCB) interconnect smaller/thinner (ST) 9.5 mm × 5.5 mm × 0.07 mm and larger/thicker (LT) 13.5 mm × 13.5 mm × 0.5 mm single Si diode samples have been studied. With the assumption of cre... Read More about Comparison of power cycling reliability of flexible PCB interconnect smaller/thinner and larger/thicker power devices with topside Sn-3.5Ag solder joints.

Electrical Performance and Reliability Characterization of a SiC MOSFET Power Module With Embedded Decoupling Capacitors (2018)
Journal Article
O Brien, J., Yang, L., Li, K., Dai, J., Corfield, M., Harris, A., …Johnson, C. M. (2018). Electrical Performance and Reliability Characterization of a SiC MOSFET Power Module With Embedded Decoupling Capacitors. IEEE Transactions on Power Electronics, 33(12), 10594-10601. https://doi.org/10.1109/TPEL.2018.2809923

Integration of decoupling capacitors in SiC MOSFET modules is an advanced solution to mitigate the effect of parasitic inductance induced by module assembly interconnects. In this paper, the switching transient behavior is reported for a 1.2kV SiC MO... Read More about Electrical Performance and Reliability Characterization of a SiC MOSFET Power Module With Embedded Decoupling Capacitors.

Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems (2018)
Journal Article
Zhang, Y., Gao, Y., Li, J., & Sumner, M. (2018). Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems. Journal of Power Electronics, 18(2), https://doi.org/10.6113/JPE.2018.18.2.343

A wide-voltage-conversion range bidirectional DC-DC converter is proposed in this paper. The topology is comprised of one typical LC energy storage component and the special common grounded asymmetric H-bridge with four active power switches/anti-par... Read More about Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems.