There is a potential threat in electric power supply when using centralized energy mode. An ideal solution to electric supply is to use distributed energy system — a system, which can be realized by flywheel energy storage. In this paper, a simulation model is investigated for flywheel energy storage on charge section. Compared with experiment results, the simulation model is proven to be correct and effective. Based on the model, it can be given reference for the designing parameters of DC brushless motor to high speed motor manufacture. This motor is controlled by DSP with the aid of the model, which optimizes electromagnetic torque control and helps to realize “S-form” of flywheel speed.