Characteristic Analysis and Simulation of Aero-Engine DC Starting Motor

Starting system is an important part of aero-engine. The power output characteristic of starter determines the starting reliability and starting quality of the engine. Direct-current (DC) starting motor is one of the aero-engine starter, aiming at the parameter selection and power matching in starting system design first, the characteristics of the DC starting motor four stages starting process are analyzed. Based on the voltage balance and torque balance, the mathematical model of the starting motor system is established, then the differential equation model is transformed into state space model and a simulation model is built in the Simulink/Matlab environment. In the case of given aero-engine starting load, the dynamic response of the starting motor system is simulated, and the simulation results show that the parameter s are coincide with the theoretical trend and the model can meet engineering requirements. The model can provide a basis for parameter selection and starting power matching of engine DC starting motor.