Short-time high overload permanent magnet synchronous motor electromagnetic heat research

With the development of fully electrified technology, electric rudders are widely used in aerospace and military applications. Rudder system motors require high power density, high dynamic response and high reliability. Permanent magnet synchronous motors are widely used in rudder servo systems because of their simple structure, high torque density, high power density and high efficiency. High power density motors generally refer to high speed high power density motors and high torque high power density motors. For the rudder system, it is mainly high torque density motors that can meet the high dynamic response performance during its frequent acceleration. There are many researches on high torque density motors at home and abroad, with various structures, such as high temperature superconducting motors, slotless cylindrical linear motors, transverse flux motors, switched reluctance motors and so on. Although the power density of such motors is very high, their technological development is still not mature enough, and their reliability cannot be guaranteed, and this paper mainly adopts rotary surface-mounted permanent magnet synchronous motors. Short-time high overload motor refers to the motor constant speed can be output in a short period of time state instantaneous large overload, complete the actuator predetermined action. In recent years, the short-time high overload motor research is increasing, the domestic Harbin Institute of Technology, Tianjin University and so on has done a lot of work, foreign research on the thermal aspects of short-time cycle work system motor more.