数字弧焊逆变电源PWM芯片的VHDL语言设计

Design of Digital PWM Chip in Digitization Welding Inverter by Using VHDL

关键词:  数字弧焊逆变电源  数字PWM  复杂可编程逻辑器件(CPLD)  硬件描述语言(VHDL)

Key words:  digitization welding inverter  digital PWM  CPLD  VHDL

摘要:

随着弧焊逆变电源的全数字化和软开关化,满足数字化控制系统要求的PWM发生芯片的设计成为技术发展的关键。文中在研究分析脉宽调制芯片工作原理的基础上,在Altera公司MAX+PLUSII集成开发环境下采用VHDL语言完成了数字PWM芯片的设计描述。软件仿真和功率试验表明设计的数字PWM芯片能够满足DSP快速信号传输和弧焊逆变电源中IGBT驱动的需要,具有可靠性高、抗干扰能力强、设计灵活的特点。

Abstract:

With the development of digital welding inverter and soft switching welding inverter,it is vital to develop digital PWM chip to meet the demand of digital control system.Base on the study and analysis of the principle about PWM chip,the digital PWM chip is established in VHDL within Altera's integrated development environment.The result of computer simulation and power load experiment verify that the PWM chip can meet the requirement of fast signal transmission on DSP and driving IGBT on welding inverter.Besides its flexible design and high reliability,the system has good anti-interference performance.