This paper will give an overview of the design, manufacturing and testing of a high speed (16000 rpm and 30 kW) AFPM synchronous machine, which is mounted inside, and as an integral part of, a flywheel; this system will subsequently be used for transient energy storage and ICE operating point optimization in an HEV. The paper focuses on the major design issues, particularly with regard to the high rotational speed, and investigates the loss mechanisms which are apparent therein, eg.iron losses, rotor losses, and friction losses. The paper describes the high-speed testing facility and includes measured results; these will be compared to calculated values.

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This paper briefly describes an approach to determine the optimum magnetic circuit parameters to minimize low speed torque ripple for switched reluctance (SR) motors. For prediction of the torque ripple, normalized data obtained from field solution and a neural network approach is used. Comparison of experimental results with computations illustrates the accuracy of the method. The optimization method is briefly described and some results are presented.

This paper gives an overview of the design, manufacturing and testing of a high‐speed (16,000 rpm and 30 kW) AFPM synchronous machine, which is mounted inside, and as an integral part of, a flywheel. This system will subsequently be used for transient energy storage and ICE operating point optimization in an HEV. The paper focuses on the major design issues, particularly with regard to the high rotational speed, and investigates the loss mechanisms which are apparent therein, e.g. iron losses, rotor losses, and friction losses. The paper describes the high‐speed testing facility and includes measured results, which will be compared to calculated values.