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Sensitivity Analysis of Machine Components Thermal Properties Effects on Winding Temperature (2019)
Presentation / Conference Contribution
Zhang, F., Gerada, D., Xu, Z., Zhang, H., & Gerada, C. (2019). Sensitivity Analysis of Machine Components Thermal Properties Effects on Winding Temperature. In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). https://doi.org/10.1109/ICEMS.2019.8922095

This paper investigates the sensitivity analysis of winding temperature to key parameters in electrical machine thermal design. With a validated 3D thermal model based on an existing 75kW traction machine for an electric vehicle, the methodology of t... Read More about Sensitivity Analysis of Machine Components Thermal Properties Effects on Winding Temperature.

Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions (2019)
Presentation / Conference Contribution
Khowja, M. R., Vakil, G., & Gerada, C. (2019). Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions. In Proceedings: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society (922-927). https://doi.org/10.1109/IECON.2019.8927436

This paper presents an analytical tool to generate torque vs speed characteristics of the surface-mounted permanent magnet machines to minimize the computation time and efforts. The paper also derives an expression of d-axis current in the field weak... Read More about Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions.

Trade-off Study of a High Power Density Starter-Generator for Turboprop Aircraft System (2019)
Presentation / Conference Contribution
Khowja, M. R., Vakil, G., Gerada, C., Yang, T., Bozhko, S., & Wheeler, P. (2019). Trade-off Study of a High Power Density Starter-Generator for Turboprop Aircraft System. In Proceedings: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society (1435-1440). https://doi.org/10.1109/IECON.2019.8926961

Mechanically-driven actuators, compressors and pumps are being replaced by the aircraft manufacturers that shift the trend towards 'More Electric Aircraft' and hence reducing the mechanical linkages within the aircraft system. This elevates the depen... Read More about Trade-off Study of a High Power Density Starter-Generator for Turboprop Aircraft System.

Fault-Tolerant Electrical Machines for Transport Applications (2019)
Presentation / Conference Contribution
Ismagilov, F., Gerada, C., Degano, M., Gurevich, O., Guliyenko, A., Vavilov, V., & Gusakov, D. (2019). Fault-Tolerant Electrical Machines for Transport Applications. . https://doi.org/10.1109/ICOECS46375.2019.8949914

This paper provides an overview of-fault-Tolerant electric machine for transport applications. A number of motor failure cases and methods to prevent or minimize their impact on the drive system are considered. The fault tolerance of bearings, stator... Read More about Fault-Tolerant Electrical Machines for Transport Applications.

Rotor UMP & Mechanical Response in HSPMSM in Typical Running Conditions (2019)
Presentation / Conference Contribution
He, Y.-L., Vakil, G., Zhang, X.-C., Gao, P., Gerada, D., & Gerada, C. (2019). Rotor UMP & Mechanical Response in HSPMSM in Typical Running Conditions. In Proceedings: 2019 IEEE Energy Conversion Congress and Exposition (ECCE) (3878-3883). https://doi.org/10.1109/ECCE.2019.8913180

This paper presents a comprehensive analysis on the rotor unbalanced magnetic pull (UMP) and the consequent mechanical response in 6 typical running conditions in a 20000 rpm high speed permanent magnet synchronous motor (HSPMSM) through finite eleme... Read More about Rotor UMP & Mechanical Response in HSPMSM in Typical Running Conditions.

Optimized Carrier Disposition Based Discontinuous Pulse-width Modulation Method for three-level NPC Converters (2019)
Presentation / Conference Contribution
Wang, M., Xu, L., Yang, B., Li, J., Gu, C., Zhang, H., …Li, Y. (2019). Optimized Carrier Disposition Based Discontinuous Pulse-width Modulation Method for three-level NPC Converters. In 2019 IEEE Energy Conversion Congress and Exposition (ECCE) (1442-1446). https://doi.org/10.1109/ECCE.2019.8912600

Three level neutral-point-clamped (3L-NPC) converter is a multilevel topology that is well-suited solution in high voltage, high frequency applications such as flexible AC transmission systems and electric vehicle drive systems. This paper is focused... Read More about Optimized Carrier Disposition Based Discontinuous Pulse-width Modulation Method for three-level NPC Converters.

A Novel Modelling Approach of Modular Multi Three-phase Drive System for High Performance Applications (2019)
Presentation / Conference Contribution
Wang, X., Gu, C., Buticchi, G., Zhang, H., & Gerada, C. (2019). A Novel Modelling Approach of Modular Multi Three-phase Drive System for High Performance Applications. In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS) (1-5). https://doi.org/10.1109/ICEMS.2019.8922523

There is a growing attention in the industrial and academic sectors for the multi-phase drive for high power and high-speed applications. The multi three-phase drive with independent neutral points is a popular option for this application, as it allo... Read More about A Novel Modelling Approach of Modular Multi Three-phase Drive System for High Performance Applications.

Equivalent Slot Thermal Conductivity and Back-iron Extension Effects on Machine Cooling (2019)
Presentation / Conference Contribution
Zhang, F., Gerada, D., Xu, Z., Zhang, H., & Gerada, C. (2019). Equivalent Slot Thermal Conductivity and Back-iron Extension Effects on Machine Cooling. In Proceedings of 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). https://doi.org/10.1109/ICEMS.2019.8921725

Back-iron Extension (BIE) is an effective thermal management technique which reduces the winding temperatures by projecting part of the back iron into the center of slot, thereby shortening the heat transfer path between the coil and back iron. Based... Read More about Equivalent Slot Thermal Conductivity and Back-iron Extension Effects on Machine Cooling.

Dual-Pulse Mode Control of a High-Speed Doubly Salient Electromagnetic Machine for Loss Reduction and Speed Range Extension (2019)
Journal Article
Yu, L., Zhang, Z., Bian, Z., Gerada, D., & Gerada, C. (2019). Dual-Pulse Mode Control of a High-Speed Doubly Salient Electromagnetic Machine for Loss Reduction and Speed Range Extension. IEEE Transactions on Industrial Electronics, 67(6), 1-10. https://doi.org/10.1109/tie.2019.2931253

In this paper, a dual-pulse mode control of a high-speed doubly salient electromagnetic machine (DSEM) for efficiency improvement over a wide speed range is investigated and implemented. The dual-pulse mode control method and operation principle are... Read More about Dual-Pulse Mode Control of a High-Speed Doubly Salient Electromagnetic Machine for Loss Reduction and Speed Range Extension.

Internal Current Return Path for Ground Leakage Current Mitigation in Current Source Inverters (2019)
Journal Article
Lorenzani, E., Migliazza, G., Immovilli, F., Gerada, C., Zhang, H., & Buticchi, G. (2019). Internal Current Return Path for Ground Leakage Current Mitigation in Current Source Inverters. IEEE Access, 7, 96540-96548. https://doi.org/10.1109/access.2019.2929062

This paper analyzes in detail the effect of a simple solution for ground leakage current mitigation applicable to transformerless three-phase current source inverter (CSI). The circuit modification solution is assessed for both traditional CSI topolo... Read More about Internal Current Return Path for Ground Leakage Current Mitigation in Current Source Inverters.

Comparative study on two modular spoke-type PM machines for in-wheel traction applications (2019)
Journal Article
Zhang, H., Hua, W., Gerada, D., Gerada, C., Li, Y., & Zhang, G. (2019). Comparative study on two modular spoke-type PM machines for in-wheel traction applications. IEEE Transactions on Energy Conversion, 34(4), 2137-2147. https://doi.org/10.1109/tec.2019.2927872

This paper focuses on the comparative analysis of modular spoke-type permanent magnet machines with two magnetization modes, which are referred to as M-I and M-II types. The analytical models of the proposed machines are built based on the simple mag... Read More about Comparative study on two modular spoke-type PM machines for in-wheel traction applications.

Information Technologies for Distributed Machine Drives: An Overview (2019)
Presentation / Conference Contribution
Savi, F., Buticchi, G., Gerada, C., Wheeler, P., & Barater, D. (2019). Information Technologies for Distributed Machine Drives: An Overview. In 2019 IEEE International Electric Machines & Drives Conference (IEMDC) (1805-1809). https://doi.org/10.1109/IEMDC.2019.8785232

The exponential growth experienced by the semiconductor manufacturing field has led to a large proliferation of devices with large amounts computational power, enabling countless technologies and revolutionizing many fields. Control systems and machi... Read More about Information Technologies for Distributed Machine Drives: An Overview.

Thermo-Mechanical Modelling of Bearing Chambers of a High-Speed Starter/Generator (2019)
Presentation / Conference Contribution
Rocca, A. L., Connor, P. H., Xu, Z., Eastwick, C. N., Pickering, S. J., & Gerada, C. (2019). Thermo-Mechanical Modelling of Bearing Chambers of a High-Speed Starter/Generator. In 2019 IEEE International Electric Machines & Drives Conference (IEMDC) (322-328). https://doi.org/10.1109/iemdc.2019.8785357

This paper describes the thermal-mechanical characterisation methodology for the bearing chambers of a high-speed (32,000 rpm) electrical starter/generator [1]; presenting a low cost analysis approach and design guideline for future machines. The met... Read More about Thermo-Mechanical Modelling of Bearing Chambers of a High-Speed Starter/Generator.

Sizing, design, and modelling of aerospace electric drive system with long feeder cables (2019)
Presentation / Conference Contribution
Xie, P., Vakil, G., & Gerarda, C. (2019). Sizing, design, and modelling of aerospace electric drive system with long feeder cables.

The aviation industry is tending towards more electric aircraft, replacing conventionally pneumatic, hydraulic, and mechanical systems with electrical solutions. The electrification of actuators is motivated by increased efficiency, reduced maintenan... Read More about Sizing, design, and modelling of aerospace electric drive system with long feeder cables.

Simplified Analytical Machine Sizing for Surface Mounted Permanent Magnet Machines (2019)
Presentation / Conference Contribution
Xie, P., Ramanathan, R., Vakil, G., & Gerada, C. (2019). Simplified Analytical Machine Sizing for Surface Mounted Permanent Magnet Machines.

This paper proposes a simple analytical machine sizing process for a three-phase surface mounted permanent magnet synchronous machines appropriate for both system level analysis and preliminary machine design. For system-level analysis, the proposed... Read More about Simplified Analytical Machine Sizing for Surface Mounted Permanent Magnet Machines.

A Novel Concept of Ribless Synchronous Reluctance Motor for Enhanced Torque Capability (2019)
Journal Article
Bao, Y., Degano, M., Wang, S., Chuan, L., Xu, Z., Zhang, H., & Gerada, C. (2020). A Novel Concept of Ribless Synchronous Reluctance Motor for Enhanced Torque Capability. IEEE Transactions on Industrial Electronics, 67(4), 2553-2563. https://doi.org/10.1109/tie.2019.2914616

The rotor structure of synchronous reluctance machines (SynRel) is conventionally retained mechanically by iron ribs. In this paper a novel structure for high speed synchronous reluctance rotor is presented. The novelty of this work is the proof of a... Read More about A Novel Concept of Ribless Synchronous Reluctance Motor for Enhanced Torque Capability.

A Nonlinear Extended State Observer for Rotor Position and Speed Estimation for Sensorless IPMSM Drives (2019)
Journal Article
Xu, Z. J., Zhang, T., Bao, Y., Zhang, H., & Gerada, C. (2020). A Nonlinear Extended State Observer for Rotor Position and Speed Estimation for Sensorless IPMSM Drives. IEEE Transactions on Power Electronics, 35(1), 733-743. https://doi.org/10.1109/tpel.2019.2914119

© 1986-2012 IEEE. Sensorless machine drives in vehicle traction frequently experience rapidly-changing load disturbance and demand fast speed dynamics. Without gain-scheduling or compensation, conventional quadrature phase-locked-loop (Q-PLL) is unab... Read More about A Nonlinear Extended State Observer for Rotor Position and Speed Estimation for Sensorless IPMSM Drives.

Active Thermal Control for Power Converters in Modular Winding Permanent Magnet Synchronous Motor (2019)
Presentation / Conference Contribution
Yan, H., Buticchi, G., Yang, J., Zhao, W., Zhang, H., & Gerada, C. (2019). Active Thermal Control for Power Converters in Modular Winding Permanent Magnet Synchronous Motor. In Proceedings - 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) (1-6). https://doi.org/10.1109/CPE.2019.8862416

To increase the reliability and reduce the torque ripple, modular winding structure has been employed in the Permanent Magnet Synchronous Motors (PMSMs). However, the reliability of the motor system depends on the lifetime of the power semiconductor... Read More about Active Thermal Control for Power Converters in Modular Winding Permanent Magnet Synchronous Motor.

Coupling calculation and analysis of three-dimensional temperature and fluid field for high-power high-speed permanent magnet machine (2019)
Journal Article
Wang, T., Zhang, Y., Wen, F., Gerada, C., Liu, G., Rui, D., & Zerun, W. (2019). Coupling calculation and analysis of three-dimensional temperature and fluid field for high-power high-speed permanent magnet machine. IET Electric Power Applications, 13(6), 812-818. https://doi.org/10.1049/iet-epa.2018.5725

© The Institution of Engineering and Technology 2019. In order to accurately estimate the temperature rise for high-power high-speed permanent magnet machines (HSPMMs), a novel temperature calculation method considering the non-linear variation of ma... Read More about Coupling calculation and analysis of three-dimensional temperature and fluid field for high-power high-speed permanent magnet machine.