深海环境充油永磁电机服役行为分析与建模

作为深海装备的动力单元，高功率密度电机的可靠运行能力对深海装备的勘探深度和勘探范围起决定性作用。深海工况下，电机在深海压力下浸水充油运行，服役行为显著改变，常规分析方法在深海电机中实用性有限。本申请从深海充油永磁电机服役行为出发，探索多物理因素协同作用下磁性材料特性与损耗的演化规律，建立深海电机磁性材料电磁参数和铁心损耗的精确模型；结合高压强充油状态下电机内部流体场的分布规律及不同工况下油摩损耗的变化规律，揭示耦合作用下电磁-温度-流体-机械场的动态演变机理；在此基础上，提出深海环境中多应力竞争失效模式下电机绝缘性能退化模型与寿命预测模型。最终形成深海电机服役行为分析与建模的系统化方法，为提高深海电机的运行可靠性提供理论支持，同时为进一步提高我国深海极端环境的资源勘测水平提供技术支撑。

As the power supplier of deep-sea equipment, reliable operation capability of high power density motors is the determinative factor for exploration depth and range of deep-sea equipment. Under deep-sea operation condition, motors are filled with oil and work in water under high deep-sea pressure, and their service behavior will change significantly, which makes normal analysis methods impractical in deep-sea motor analysis. Starting from the service behavior of deep-sea oil-filled permanent-magnet motor, this application attempts to explore the evolution laws of magnetic material property and loss under the synergistic effect of multiple physical factors and then establishes the accurate model of electromagnetic parameters and core loss of magnetic materials. Combining with the distribution rule of flow field inside motors and variation rule of oil friction loss under different working conditions, the dynamic evolution principle of electromagnetic, thermal, flow and mechanical fields is discovered. Based on the above exploration, the performance degradation model and lifetime estimation model of motor insulation under competing failure modes in deep-sea environment are proposed. And finally, the systematic method for analyzing and modeling deep-sea motor service behavior will be achieved. This will provide theoretic support to increase the operation reliability of deep-sea motors and technical support to escalate the resource exploration level in deep-sea extreme environment of our country.