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An enhanced hybrid switching-frequency modulation strategy for fuel cell vehicle three-level DC-DC converters with quasi-Z source (2018)
Journal Article
Zhang, Y., Shi, J., Fu, C., Zhang, W., Wang, P., Li, J., & Sumner, M. (2018). An enhanced hybrid switching-frequency modulation strategy for fuel cell vehicle three-level DC-DC converters with quasi-Z source. Energies, 11(5), 1-16. https://doi.org/10.3390/en11051026

For fuel cell vehicles, the fuel cell stack has a soft output characteristic whereby the output voltage drops quickly with the increasing output current. In order to interface the dynamic low voltage of the fuel cell stack with the required constant... Read More about An enhanced hybrid switching-frequency modulation strategy for fuel cell vehicle three-level DC-DC converters with quasi-Z source.

Model predictive direct flux vector control of multi three-phase induction motor drives (2018)
Journal Article
Rubino, S., Bojoi, R., Odhano, S., & Zanchetta, P. (2018). Model predictive direct flux vector control of multi three-phase induction motor drives. IEEE Transactions on Industry Applications, 54(5), 4394 - 4404. doi:10.1109/TIA.2018.2829458

A model predictive control scheme for multiphase induction machines, configured as multi three-phase structures, is proposed in this paper. The predictive algorithm uses a Direct Flux Vector Control scheme based on a multi three-phase approach, where... Read More about Model predictive direct flux vector control of multi three-phase induction motor drives.

A variable current-limit control scheme for a bi-directional converter used in ultracapacitor applications (2018)
Journal Article
Ahmadi, B., Barati, F., & Karimi, C. (in press). A variable current-limit control scheme for a bi-directional converter used in ultracapacitor applications. Electric Power Components and Systems, 46(3), https://doi.org/10.1080/15325008.2018.1445139

In ultracapacitor applications, generally, a bi-directional converter is connected to a DC bus and is designed to compensate rapid load variations on the bus. During transient phases, overloaded DC bus can push the converter out of its operating limi... Read More about A variable current-limit control scheme for a bi-directional converter used in ultracapacitor applications.

Modulated Model-Predictive Control with Optimized Overmodulation (2018)
Journal Article
Garcia, C. F., Silva, C. A., Rodriguez, J. R., Zanchetta, P., & Odhano, S. A. (2019). Modulated Model-Predictive Control with Optimized Overmodulation. IEEE Journal of Emerging and Selected Topics in Power Electronics, 7(1), 404-413. https://doi.org/10.1109/JESTPE.2018.2828198

© 2013 IEEE. Finite-set model-predictive control (FS-MPC) has many advantages, such as a fast dynamic response and an intuitive implementation. For these reasons, it has been thoroughly researched during the last decade. However, the waveform produce... Read More about Modulated Model-Predictive Control with Optimized Overmodulation.

Power quality improvement of synchronous generators using an active power filter (2018)
Journal Article
Abu-Jalala, A., Cox, T., Gerada, C., Rashed, M., Hamiti, T., & Brown, N. (2018). Power quality improvement of synchronous generators using an active power filter. IEEE Transactions on Industry Applications, 54(5), 4080-4090. https://doi.org/10.1109/TIA.2018.2828789

Active power filters (APF) are used to improve power quality and are commonly connected in parallel with the load at the point of common coupling (PCC). They are used to compensate for harmonics from nonlinear loads, for reactive power compensation a... Read More about Power quality improvement of synchronous generators using an active power filter.

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.

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.

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.

Influence of rotor endcaps on the electromagnetic performance of high speed PM machine (2018)
Journal Article
Al-Timimy, A., Alani, M., Degano, M., Giangrande, P., Gerada, C., & Galea, M. (2018). Influence of rotor endcaps on the electromagnetic performance of high speed PM machine. IET Electric Power Applications, 12(8), 1142–1149. https://doi.org/10.1049/iet-epa.2017.0811

Surface-mounted permanent magnet (SPM) machines are preferred for high-speed aerospace applications over induction and switched reluctance machines, since they combine the advantages of high torque density and efficiency. Also, in aerospace applicati... Read More about Influence of rotor endcaps on the electromagnetic performance of high speed PM machine.

Synchronous reluctance motor iron losses: considering machine non-linearity at MTPA, FW, and MTPV operating conditions (2018)
Journal Article
Mahmoud, H., Bacco, G., Degano, M., Bianchi, N., & Gerada, C. (2018). Synchronous reluctance motor iron losses: considering machine non-linearity at MTPA, FW, and MTPV operating conditions. IEEE Transactions on Energy Conversion, 33(3), 1402-1410. https://doi.org/10.1109/TEC.2018.2811543

Synchronous reluctance machine has high flux density fluctuations in the iron due to the high harmonics results from the rotor anisotropy. Thus, an accurate computation of the iron losses is of paramount importance, especially during the design stage... Read More about Synchronous reluctance motor iron losses: considering machine non-linearity at MTPA, FW, and MTPV operating conditions.

Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models (2018)
Journal Article
Salis, V., Costabeber, A., Cox, S. M., Formentini, A., & Zanchetta, P. (2018). Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models. IEEE Journal of Emerging and Selected Topics in Power Electronics, 6(4), 2147-2158. https://doi.org/10.1109/JESTPE.2018.2810282

In recent years, a considerable effort has been made to minimise the size of DC-link capacitors in single-phase activefront-ends (SP-AFE), to reduce cost and to increase power density. As a result of the lower energy storage, a high-bandwidth outer D... Read More about Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models.

A nonlinear analytical model for the rapid prediction of the torque of synchronous reluctance machines (2018)
Journal Article
Bacco, G., Bianchi, N., & Mahmoud, H. (2018). A nonlinear analytical model for the rapid prediction of the torque of synchronous reluctance machines. IEEE Transactions on Energy Conversion, 33(3), 1539-1546. https://doi.org/10.1109/TEC.2018.2808168

The synchronous reluctance motor works under heavy saturation. This paper presents a nonlinear analytical model of the reluctance machine, which is used to derive both average and torque harmonics as a function of the rotor geometry. Maps showing the... Read More about A nonlinear analytical model for the rapid prediction of the torque of synchronous reluctance machines.

A modified modulation scheme for three-level diode-clamped matrix converter under unbalanced input conditions (2018)
Journal Article
Su, M., Zhao, Z., Dan, H., Peng, T., Sun, Y., Che, R., …Wheeler, P. (2018). A modified modulation scheme for three-level diode-clamped matrix converter under unbalanced input conditions. IET Power Electronics, 11(8), https://doi.org/10.1049/iet-pel.2017.0512

The three-level diode-clamped matrix converter topology has outstanding performance under ideal operating conditions. However, input disturbance can influence the waveforms at the output side of the converter due to the direct coupling between the in... Read More about A modified modulation scheme for three-level diode-clamped matrix converter under unbalanced input conditions.

Considerations on the effects that core material machining has on an electrical machine's performance (2018)
Journal Article
Al-Timimy, A., Vakil, G., Degano, M., Giangrande, P., Gerada, C., & Galea, M. (2018). Considerations on the effects that core material machining has on an electrical machine's performance. IEEE Transactions on Energy Conversion, 33(3), 1154-1163. https://doi.org/10.1109/TEC.2018.2808041

An often-overlooked aspect during the development process of electrical machines, is the validity and accuracy of the machine material properties being used at the design stage. Designers usually consider the data provided by the materials supplier,... Read More about Considerations on the effects that core material machining has on an electrical machine's performance.