Abstract
An upgrade to the magnet power digital feedback system (DFS) for the real time control of the PF coil power supplies is currently being developed and commissioned in HL-2A. The system aims to perform higher control resolution, more stable control cycle, real time monitoring and protection. The DFS has been shown to have better performance than the existing system in the control of the PF coil power supplies. It can control effectively all the PF coil power supplies, including the ohmic heating power supply (OHPS), vertical field power supply (VFPS), radial field power supply (RFPS) and the divertor coil power supply (DCPS). Meanwhile, the high-speed data transmission with reflective memory is used to transfer the control parameters of the PF coil power supplies. Moreover, the DFS also provides the real time monitor and protection based on the experimental physics and industrial control system (EPICS).
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