RESEARCH ON MODELING THE TEMPERATURE FIELD OF A NEW AEROSPACE SERVO ELECTRO-HYDROSTATIC MODULE BASED ON THERMO-MAGNETIC BIDIRECTIONAL COUPLING ANALYSIS

The highly compact Electro-Hydrostatic Module (EHM) is a key technology for future Electro-Hydrostatic Actuation (EHA) in the aerospace industry. Analyzing and improving the heat dissipation capability is crucial for EHM. In order to accurately analyze the temperature distribution of EHM under various operating conditions, a new evaluation method for friction losses of EHM under mixed friction conditions is proposed. A multi-physics coupling method, including flow field, electromagnetic field, and temperature field, is introduced for temperature rise calculation. The electromagnetic losses obtained from electromagnetic analysis are directly mapped to the temperature field and incorporated into the boundary conditions of the flow field through multiple iterative couplings. This paper compares the thermal analysis results of two different temperature rise calculation methods, analyzes the temperature distribution of EHM under different operating conditions, and discusses the simulation results in comparison with experimental measurements. The multi-physics coupling simulation method demonstrates an accuracy improvement of 17.58% compared to the traditional approach, validating the superiority of the proposed coupling analysis method in enhancing the accuracy of motor temperature rise calculation. From the perspectives of reliability and efficiency, this research provides theoretical reference points for thermal management of novel EHM.