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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...
In this paper, a new DC current measuring method using current transformer is put forward in this design, which can both reducing the cost of current sensor component and fulfilling the requirement of current detecting, simply adding a diode and a resister. A digital controlled battery charger based on microprocessor for high power UPS application is also presented. A two-stage charging strategy along...
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