关键词: 三相感应电机, 单相运行, 温度场, 定子, 有限元法

Abstract: Due to the operation of the novel single-phase running of a dual-capacitor three-phase induction motor under non-rated conditions, the three-phase winding currents will no longer be symmetrical. To ensure the stable long-term operation of the motor, it is necessary to calculate and analyze the steady-state temperature field of the new connection method. A three-dimensional heat transfer model of the stator of the three-phase induction motor was established, and finite element method was used to study the temperature field under rated, light load, and heavy load conditions. To verify the correctness and effectiveness of this method, temperature rise tests were conducted on the motor, and the test results were in good agreement with the simulation results. The results indicate that the new connection method results in significant heating under light and heavy load conditions, but the temperature does not exceed the maximum allowable temperature of the motor insulation material. However, the heating during rated operation is close to that of three-phase symmetrical
operation.

Key words: three-phase induction motor, single-phase operation, temperature field, stator, finite element method