一种基于FPGA的三相锁相环设计方法

design scheme of three phase phase-locked loop controller based on a field programmable gate arrays (FPGA) is presented. This paper introduces basic architecture and principle of this phase-locked loop including phase discriminator, loop filter and voltage controlled oscillator, etc. This scheme integrated d, q transformation, PI loop filter, VCO module and other test modules which were all written in Verilog HDL. Experimental results verify this controller base on FPGA can provides satisfied dynamic and static, as well as, system can lock the phase information on five cycle. The controller can satisfy the multi-level AC-DC-AC converter equipment with real time and accuracy requirements.