Method for calculating temperature field of main driving motor of electric aircraft

Abstract

The invention discloses a method for calculating a temperature field of a main driving motor of an electric aircraft. The method comprises: (1) in combination with a special structure of the main driving motor of the electric aircraft, setting a basic assumption of a solving process; (2) in combination with a practical working condition of the main driving motor of the electric aircraft, finishing the setting of boundary conditions of a fluid field and the temperature field; (3) establishing a mathematic model of the main driving motor of the electric aircraft; (4) establishing a physical model of the main driving motor of the electric aircraft, and finishing model network subdivision; and (5) based on a fluid-structure coupled differential equation, performing solving with a finite element numerical method to obtain temperature rise distribution of the main driving motor of the electric aircraft in different operation conditions. According to the method, the temperature field and the fluid field of the main driving motor of the electric aircraft are subjected to whole-field solving; the same mathematic model is adopted; and the method has the advantages of high solving speed, low iterative frequency and high calculation precision.

Description

technical field [0001] The invention relates to a method for solving the temperature field of a main drive motor of an electric aircraft based on the theory of fluid-solid coupling, and belongs to the technical field of temperature field analysis of high energy density motors. Background technique [0002] With the gradual opening of low-altitude airspace and continuous research on new energy technologies, the civil electric aircraft industry is developing rapidly. Electric aircraft requires high power density and high torque density of the main drive motor, which makes the temperature rise of the main drive motor of electric aircraft higher than that of ordinary motors. If the calculation of the temperature field of the main drive motor is inaccurate, the motor will not work normally. Especially for the motor used in the main drive of electric aircraft, its temperature rise is higher than that of conventional motors, which is generally close to the maximum value that the mo...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the heat dissipation coefficient of the temperature field of the traditional motor is difficult to solve, and the temperature field of the stator and the rotor has a large error in solving alone, the present invention provides a flow that is effectively suitable for the main drive high-energy-density motor of the electric aircraft and has high solution accuracy and fewer iterations. Solid coupling temperature field solution method

Images