Abstract：Aero flywheel motors integrate a starter, flywheel, and generator in a heavy fuel piston aero-engine. Direct torque control (DTC) gives quick dynamic response, has a simple structure, and is very robust so it is the best choice for controlling aero flywheel motors. The flux estimator, the most important part of the controller, is influenced by the initial value, DC offset, resistor error, and inverter nonlinearity. This paper describes a flux estimator based on a low pass filter (LPF) to improve the estimates. Simulations of the aero flywheel motor starting performance with this flux estimator show that that the starting performance is improved.
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2019, Vol. 59 
