潜油泵直驱单元组合式永磁电机热负荷分析

Study of Thermal Load of Unit Combination Permanent Magnet Motor for Direct-drive Submersible Pump

由于潜油泵驱动电机工作中产生热和冷却过程相对复杂,井下潜油电机系统工况特殊,无法直接测量温度。单元电机设计时热负荷的选取对电机的温升至关重要。本文对单元电机运行过程中的铁心损耗、绕组损耗和机械损耗进行了计算,应用有限元法求解电机的三维稳态温度场,同时对样机常温温升实验和常温状态下的有限元分析做对比,结果表明两种方法计算所得电机各部分温升相一致,证明计算方法及结果的可行性。验证了单元电机设计所选取的热负荷可以满足电机的实际温升需要。

Because of the more complex process of the internal heating and cooling and special working condition,the temperature cannot be directly measured. Accurate control of the temperature rise of unit motor is important to the selection of the thermal load. The winding loss and core loss and mechanical loss in the steady state in the process of submersible motor was calculated. The FEM was used to solve 3D steady-state temperature field. As well as the prototype rise experiment and FEM analysis under the normal temperature state was compared,calculation results show that the two methods is consistent in all parts of the motor temperature. The calculation method and result was accuracy. The selection of the motor thermal load can meet the need of the actual temperature rise of the motor.