基于FPGA的程控三相功率源设计与实现

Design and implementation of programmable three-phase power signal source based on FPGA

程控三相功率源用于检测三相电能表,功率表,取代了传统的电磁式校验装置。性能、指标上都有了很大的改进,但是也存在电路比较复杂,电路板面积比较大,容易出现故障,稳定性差等缺点,本设计基于FPGA直接数字合成技术,实现了高精度功率信号的产生,开发出一种成本低、性能稳定、结构简单、集成度高以及操作灵活简单的三相交流功率信号源。通过友好的人机交互界面,可以方便地调节输出信号的频率、相位、幅度。同时保证输出的信号具有高的电流、电压、频率精度和超低的波形失真度。

Programable three-phase power source is used in the detection of three-phase power meter, three-phase watt-hour meter, etc instead of troditional dlectic magenatic equpiment. programmable three-phase power source based on the FPGA using direct digital synthesis（DDS） has realized the generation of signal source, and through the power amplification circuit for FPGA signal power amplifier.The powerful function of FPGA, you can easily adjust the frequency, phase and amplitude of the output signal.In this paper, from the aspects of hardware and software architecture of scheme are expounded.The feasibility of the scheme is verified by experiment.