5 August 2014 Design of one large telescope direct drive control system based on TMS320F28xx
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The mount drive control is the key technique which mostly affects astronomical telescope’s resolution and its speed. However, the ultra -lower speed and the giant moment of inertia make it very difficult to be controlled. In this paper, one segmented permanent-magnet synchronous motor (PMSM), 4m diameter, is suggested for the mount driving. A method is presented to drive the motor directly, which is based on TMS320F28XX and Insulated Gate Bipolar Transistor (IGBT) , also, HEIDENHAIN tape is used to detect the absolute position of the motor together with the Hall sensor. The segmented PMSM can work stable and the mount drive can realize nice tracking performance at ultra -lower speed with this drive system.
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Xiao-li Song, Xiao-li Song, Da-xing Wang, Da-xing Wang, Chao Zhang, Chao Zhang, Zhen-chao Zhang, Zhen-chao Zhang, Li-yan Chen, Li-yan Chen, Chang-zhi Ren, Chang-zhi Ren, "Design of one large telescope direct drive control system based on TMS320F28xx", Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 91501L (5 August 2014); doi: 10.1117/12.2055134; https://doi.org/10.1117/12.2055134

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