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In order to overcome the contradictory between the small voltage overshoot and the fast response time of the traditional PI control, sliding mode control (SMC) is introduced on the basis of using TMS320LF2407 into the pure digital control system of phase-shift full-bridge ZVS arc welding inverter power source. This has not only effectively solved the voltage overshoot during the welding process, but...
According to the basic characteristics of arc welding and cutting, the arc welding/cutting inverter with SMC and PI control is researched and designed. There are two alternate loops: voltage loop on no-load and current loop on load. Through demonstrating the external characteristics demands of arc welding/cutting power source and analyzing the control algorithm, PI control is used on current loop...
Through analyzing the shortcomings of the control system on the traditional cutting inverter, this paper presents the double close loop control system based on pole assignment for cutting inverter, which based on phase shift full bridge zero voltage switched (PS-FB-ZVS). This paper builds the small signal mode of PS-FB-ZVS PWM converter, and assigns the double close loop PI parameters by pole assignment...
According to the basic characteristics of arc welding and cutting, the multi-functional arc welding/cutting inverter based on phase shift-full bridge-zero voltage and zero current switches (PS-FB-ZVZCS) is designed. This paper analyzes design procedures and carefully selects components, which provide the theoretic foundation for the manufacture of PS-FB-ZVZCS inverter power sources. Then, this paper...
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