基于现场可编程门阵列的多路PWM波形发生器

研制了基于现场可编程门阵列(FPGA)实现的多路PWM脉冲发生器。该脉冲发生器通过接口单元接收DSP写入的PWM脉冲宽度数据，然后产生PWM波形，其工作不受DSP影响。同时介绍了脉冲发生器的基本原理、硬件构成和实现方法。该PWM发生器既简化了电路的设计，提高了系统的可靠性，又可保证逆变器功率元件触发的同步。

MULTI-PWM PULSE GENERATOR BASED FPGA

This paper presents a novel method using field programmable gate array( FPGA ) to implement a PWM pulse generator with five-level PWM inverters. The pulse generator receives the PWM pattern parameters from a DSP processor through a built-in parallel interface, and produces the three-phase PWM drive signals without the DSP intervention. The basic principles, hardware configuration, implementation method of the generator described in this paper. Three phase PWM generators and especially suits to carrier phase-shifting SPWM modulation method, and has the feature of simplifying circuit-design, guaranteeing reliability of system and concurrent triggering of power devices.