摘要
针对焊接系统直流电压的工作特点,详细分析了输出端电压型Boost DC/DC变换器的拓扑电路结构及其相应的控制方法。采用双频率BF(Bi-Frequency)控制方法,采用两组导通时间相同但频率不同的控制脉冲实现对开关管控制;分析了电压型双频率调制DCM Boost变换器的工作原理以及工作过程分析了纹波特性和脉冲组合特性,用PSIM仿真软件对其进行仿真分析,仿真验证了该拓扑结构具有快速的瞬态响应特性。在降低EMI噪声以及快速瞬态响应速度方面,比传统的脉冲宽度调制(PWM)和脉冲频率调制(PFM)更具优越性。搭建了电压型Boost变换器样机实验平台,通过实验验证了其可行性。
For the working characteristics of Welding system ,the paper analyzes the structure of the Welding system circuit topology the output of the voltage - Boost DC / DC converter,and a detailed analysis of its corresponding control methods. In this paper,a dual frequency BF（Bi - Frequency）control method using two identical but on - time control pulses of different frequencies to achieve the control switch,a detailed analysis of the working principle of voltage dual frequency modulation DCM Boost Converter and work process,analyze the characteristics and ripple pulse combination of features,its simulation analysis using PSIM simulation software simulation of the topology with fast transient response characteristics. Reduce EMI noise and fast transient response speed than conventional pulse width modulation（PWM）and pulse frequency modulation（PFM）has advantages. Finally Voltage Boost Converter builds a prototype experiment platform,through experimental verification of its feasibility.
出处
《电焊机》
北大核心
2014年第6期67-71,共5页
Electric Welding Machine
