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Influence of End Structure Optimization on 3D Electromagnetic Field and Losses of a Novel Double-Side Counter-Flow Turbogenerator
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DOI：10.1109/TEC.2025.3649196.png)
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Abstract
En 中文
Turbogenerators are crucial equipment in power generation. Unreasonable design of the end of such generators can lead increased end losses that can impact the safety and stability of the system in operation. In this study, a 350-MW novel double-side counter-flow large turbogenerator is proposed. A three-dimensional transient nonlinear electromagnetic field model of the end region of the turbogenerator is established to analyze the electromagnetic field. In order to reduce the losses of end components, the novel structural optimization design is proposed. The influence of the modified end structure on the flux density of the end components is investigated by varying the relative lengths of the stator and rotor cores and the distances between the copper screen and windings. The losses of the end components are obtained under different end structures. The results show that a reasonable relative length between the stator and rotor cores and distance between the copper screen and winding effectively reduced losses from end components in the proposed design. The results of the calculation are verified experimentally. Thus, this study provides an important reference for the optimization of the end structures of turbogenerators.
Keywords:
Turbogenerators
magnetic flux density
eddy current losses
temperature distribution
testing
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