基于DSP产生的移相PWM点焊控制脉冲软件设计  

Software Design on Phase-Shifting PWM Control Pulse of Spot-welding based on DSP

作　　者：陈刚[1] 张勇[1] 王瑞[1] 杨思乾[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《电力电子技术》2007年第3期54-56,共3页Power Electronics

摘　　要：在分析TMS320LF2407A DSP硬件结构及产生PWM输出脉冲原理的基础上,推导并建立了各控制寄存器的十进制赋值和输出PWM参数关系的计算公式。利用TMS320LF2407A Demo板以及C语言和汇编语言混合编程,按照推导的计算公式对软件中各控制寄存器赋值进行灵活调整,从而为DC/DC全桥逆变点焊电源实现零电压软开关(Zero Voltage Switching,简称ZVS)运行模式提供了所需要的频率、死区时间和脉冲移相角的PWM波形。The calculation formulas among decimal values of control registers and the parametric relations of output PWM are deduced and built in this paper,which based on the analysis of hardware elements TMS320LF2407A DSP chip and the principle of generating PWM output pulse.According to those formulas to revise expediently decimal values of control registers,a PWM output pulse with suited output frequency,delay time and phase-shifting angle is gained expediently by the TMS320LF2407A Demo module and a C ＆ assembler languages program,in order to achieve a zero-voltage soft-switch operational mode of DC/DC full bridge spot-welding inverter power supply.

关 键 词：逆变电源 点焊 脉宽调制/移相 数字信号处理器 

分 类 号：TM464[电气工程—电器] TG434.1[金属学及工艺—焊接]