基于DSP和CPLD的三相PWM整流器设计

A Design of Three-phase PWM Rectifier Based on DSP and CPLD

结合三相电压型PWM整流器的数学模型，对整流器控制策略进行研究，设计了基于PI调节器的电流内环和电压外环的双闭环控制策略，并以DsP和cPLD为核心构建PWM整流器控制系统，给出具体硬件电路和详细软件流程。实验结果表明：该PWM整流器可以有效地抑制谐波，实现网侧单位功率因数控制，具有优越动静态性能。

Based on the mathematic model of a three-phase PWM rectifier, the paper studies the control strategy of rectifier. A double closed-loop control system composed of an internal current loop and an external voltage loop is designed based on the PI regulator. The control system for PWM rectifier is constructed based on DSP and CPLD and the design of hardware and software is presented in detail. The experiment results show that this rectifier could effectively suppress the harmonic pollution and present comparatively better dynamic and static characteristics.