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As the development of precise machining, electrical machines with high precision and high dynamic are the focus of research. This paper proposes three kinds of two-degree-of-freedom Voice Coil Motor (VCM), which provide linear-rotary motion. The VCM with two motion units has a great controllability and perfect rotary torque features, the one with parallel axes of motions has the highest average linear...
Permanent Magnet Linear Synchronous Motor (PMLSM) with ring windings is a suitable choice for transport systems, because of the high utilization of armature and unique winding structures. This paper proposes a novel trilateral PMLSM with slotless ring windings, which has a high thrust density and great performance. The structure and operating principle of the novel trilateral PMLSM are introduced,...
To study the very fast transient over-voltage (VFTO) distribution in transformer windings in gas insulated substation (GIS), a systematic methodology based on s-parameters is presented for establishing high-frequency model of transformer windings in this paper. Firstly, voltage transfer functions are derived from s-parameters which are calculated or measured from transformer windings. Secondly, voltage...
To investigate the Very Fast Transient Over-voltage (VFTO) distribution in transformer windings in Gas Insulated Substation (GIS), a systematic methodology based on hybrid model is presented for establishing high-frequency model of transformer windings in this paper. Firstly, the voltages at the end of each coil are calculated by means of Single-Conductor Transmission Line Model (STLM). Secondly,...
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