数控低中频交流电流源的设计与实现  

Design of digital controlled current supply with low and middle frequency

作　　者：刘修文[1,2] 张昌华[1,2] 孟劲松[1,2] 

机构地区：[1]电子科技大学电力系统广域测量与控制四川省重点实验室,成都611731 [2]电子科技大学能源科学与工程学院,成都611731

出　　处：《电子测试》2013年第1期87-90,100,共5页Electronic Test

摘　　要：本文提出了一种基于FPGA控制DAC产生交流电压,并用该交流电压控制压控恒幅交流源电路产生低中频交流电流源的设计方法。详细介绍了串行D/A转换器TLC5615的用法及FPGA对它的时序控制,以及用逐个描点产生周期信号的一种方法,也详细介绍了压控交流恒流源电路的一种实现,以及用反馈回路稳定电流的原理。该电路可用开关调频,旋钮调幅,适用于低频信号发生器、功率电流源等仪器的恒幅交流源信号发生部分的设计,具有成本低、性能稳定、调幅调频灵活等特点。.. This paper presents a method to design a kind of AC current supply with any frequency and any waveform which is produced by DAC and controlled by Field Programmable Gate Array （FPGA）. It introduces the use of the D/A converter TLC5615 and how to control it by FPGA ,and the method of describe the points of the period signal. It introduces the design of AC current supply by voltage , and how to use the feedback to make the current stable. The circuit can change the frequency by gates,and change the amplitude by the knob . And it can be used on design of low- frequency producer circuit, power current supply and some other signal producers. And it has the characteristics of low costs, stability and being easy to modify.

关 键 词：电流源 信号发生 压控 

分 类 号：TN792[电子电信—电路与系统]