High Temperature Superconducting (HTS) Machines
by Dr Min Zhang of Bath University

This presentation focuses on the developing status and challenges of high temperature superconducting machines. The topics to be covered include the industrial application of HTS machines, existing demonstrating projects, technical design challenges and future developing opportunities.

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Fault detection and insulation health monitoring for high availability electric drives
by Prof Jiabin Wang of University of Sheffield

The presentation addresses a number of issues associated with high availability electrical drives, including fault detections and insulation health monitoring.

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Electromagnetic and thermal limits - the design challenge
by Dr David Powell of Magnomatics Ltd

Torque density is traditionally attained through high performance materials and advanced cooling in conventional PM motors. This often results in a large difference between the electromagnetic and thermal limits. An innovative approach to the design of magnetically geared machines allows the electromagnetic and thermal limits to occur at the same point. This presentation discusses magnetically geared machines for applications requiring continuous duty, where thermal and electromagnetic limits can exist for a single operating point.

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Self-Aware High Performance SR Machine
by Prof Chris Gerada of Nottingham University

This presentation will describe the development of a high performance, fault tolerant, Switched Reluctance Machine. Integration of fiber optic measurement within the structure allows for real-time measurements for health monitoring and control.

Requirements management for development of motor drive systems for aerospace applications
by Dr Tadashi Sawata of Motor Drive Systems Centre, UTC Aerospace Systems

In developing motor drive systems for aerospace applications, it is common that most of development efforts are spent on functions which are not directly related to motor drive performance. It is extremely important to develop and understand customer requirements for the other functions as well as those for motor drives. This presentation discusses the requirements management (validation and verification) by using an electric thrust reverser product as an example. It discusses an effort to improve requirements management process by using a model based approach.

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Rotor Radial Vent Pumping in Large Synchronous Electrical Machines
by Mr Darren Camilleri of Cummins Generator Technologies Ltd

Rotor radial vents make use of the pumping effect to increase airflow through the active material thus reducing hotspot temperatures. The effect of rotor radial pumping in synchronous machines has been studied previously. This paper presents the findings of previous studies and builds upon their theories using a parametric numerical approach to investigate the rotor radial pumping effect. The use of Minitab and ANSYS Workbench to investigate the key performance characteristics of radial pumping through a Design of Experiments (DOE) was described. CFD results were compared with theoretical calculations. A correlation for each response variable was derived through a statistical analysis. Findings confirmed the strong dependence of radial vent length on vent pressure gradient, and radial vent cross-sectional area was proved to be significant in maximizing radial vent flow rate

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Electromagnetic Vibration Isolation
by Dr Johan Paulides of Technical University of Eindhoven

Many modern advanced electromagnetic devices use permanent magnets as a source of magnetic field. The strong and reliable magnetic fields of today’s rare-earth permanent magnets increase their force density and are often used to improve force or torque characteristics. Most of them are based on the interaction between the magnetic field of permanent magnets and current-carrying coils, as seen in rotary or linear machines and voice coil actuators. However, some applications, for example magnetic couplings or electromagnetic vibration isolation systems, rely on the strong and position-dependent passive force between permanent magnets instead of an active force resulting from a current. An advanced vibration isolation system has been chosen for demonstration, which, compared to established technologies such as hydraulics, pneumatics or mechanics, a permanent-magnet based vibration isolator, offers a reduction in energy consumption and an increase in isolation bandwidth. The gravity is in such device compensated with permanent magnets, whilst actuators provide the necessary stabilization and may be used to improve the vibration isolation performance. An unexplored application of this technology is the isolation of heavy platforms with weights of hundreds of kilograms, in which a permanent-magnet topology compensates the gravity force. The contradictory requirements of such a system, i.e. a high gravity-compensation force combined with an extremely low stiffness for good floor vibration rejection, put high demands on the design of gravity compensators.

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