基于FPGA与AD7985的脉冲电源数据采集设计

为了满足精密电镀的控制需求,设计了一种基于FPGA和AD7985的高速高精度的数据采集系统,该数据采集系统可应用于高精度的脉冲电镀电源中,用于采集输出脉冲的电流和电压参数并用于电流调控.首先设计分析了采集系统的主要硬件电路,包括隔离放大电路、电压跟随电路和AD转换电路;然后对AD7985的控制时序进行了研究,给出了控制...

Design of Pulse Power Data Acquisition Based on FPGA and AD7985

In order to meet the control requirements of precision electroplating,a high-speed and high precision data acquisition system based on FPGA and AD7985 is designed.The data acquisition system can be applied to the high-precision pulse electroplating power supply,which is used to collect the output pulse current and voltage parameters and to regulate the current.Firstly,the main hardware circuit of the acquisition system is designed and analyzed,including isolation amplifier circuit,voltage following circuit and AD conversion circuit.Then the control time sequence of AD7985 is studied,the control flow chart is given,and the expected simulation waveform is obtained through Quartus II simulation.Finally,the data acquisition system used in high precision pulse electroplating power supply,in two separate positive pulse and cycle reversing pulse mode can realize the real-time current,voltage,high speed data acquisition,the acquisition of current errors are within 10 mA,can effectively meet the demand of high precision plating power source current control.