Design of digital adjustor applied to power supply system for HIRFL-CSR

The control of power supply is the key point in the design of HIRFL-CSR system. Based on ARM + FPGA + AD/DA and state-space equation techniques, the design of digital adjustor applied in the power supply system for HIRFL-CSR in Lanzhou is realized. The digital adjustor can accomplish an adjustment control of fifth order and lower. ARM is used as the core of the control system to deal with the multi-threaded task and the precision of power adjustment control is implemented mainly by FPGA and AD/DA techniques. The embedded gigabit fiber interface can transmit the digital signal from external DSP board and the system uses optoelectronic isolator to inhibit interference signals for 32 bit input/output digital signals. Field test has proved that this digital adjustor can meet HIRFL-CSR's control precision requirement of 10-4 and reduce the recovery time of power system devices. (authors)