| Flywheel energy storage (FES) is an advantageous type of late-model energy storage technology; also, FES system (FESS) itself is an inertia system. At present, FES technology has been successfully applied in many fields such as uninterruptable power supply (UPS) systems, electric power systems, hybrid electric vehicles, etc. Researches indicate that in energy sources and attitude control system of satellites, by FESS both energy storage and attitude control can be accomplished. It would be remarkable to improve global performance of satellites, so aeronautics & astronautics departments attach great importance to FESS. And it becomes a frontier topic in this research area, but has not been applied in practice. With the advanced topic of 863 Program as research background, the paper makes some advanced researches on application of FES technology in future satellites.The paper is mainly engaged in researches on power converter, the key component in FESS, and it should be a bi-directional power transformation instrument. The paper designs basic modules at first, and then integrates multiple modules into a whole power converter. Through analyses of physical structure, work module and control mode of FESS, the paper proposes a global solution based on the TMS320LF2407 DSP chip, emphatically conducts the design of real-time control system and research on energy feedback technology, elaborately discusses the integration design of power converter and finally completes the development of experimental prototype.In the design of real-time control system, the paper takes three-phase full-bridge MOSFET inverter as the real-time control main circuit, and adopts a control scheme with 120?switching mode combined with half-bridge pulse width modulation (PWM), which would avoid straightthrough short of a certain bridge. Phase current is detected by single current sensor; three-phase position signals generated by position sensors could not only supply commutation information for inverter, but also be usedfor speed detecting based on signals' period measurement, which makes the speed sensor unnecessary. The whole control system adopts speed and current dual closed-loop control strategy in order to construct a high performance rare-earth permanent magnetic brushless DC motor (REPM BLDCM) full-digital real-time control system. During the research on energy feedback technology, the paper explicates the basic principle of energy feedback and puts forward a feasible solution. And a novel boost-buck DC/DC converter is specially designed. The inverter acting as a rectifier, dumping capacitor and above DC/DC converter together constitutes the energy feedback main circuit. The control system adopts current PWM control mode, and high quality energy feedback with constant power could be accomplished. In addition, the paper involves some researches on malfunctions detection and protection, data communication, state supervision, and so on. Experimental results indicate that under two different work modules, i.e. real-time control and energy feedback, experimental prototype could achieve excellent static performance, dynamic characteristic and high power transformation efficiency, which consequently prove the correctness and feasibility of our solution.On the whole, the main loop draws on the design idea of the full-wave boosting C-dump converter and meets design requirements of power converter. The control loop takes a high speed, high performance TMS320LF2407 DSP chip as the control center, so it simplifies peripherals. The control software takes place of hardware circuit to implement the majority of functions, which is designed by means of C and assembly mixed programming. Finally, it reaches the design objective of the controller on a chip. The whole system has many features such as compact hardware circuit, high efficiency, low power dissipation, high reliability and convenience for upgrade, yet has great application value.
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