A new PSFB converter-based inverter arc welding machine with high power density and high efficiency

Design proposal for high-efficiency, high-power density dual interleaved LLC converter with interactive control interface

Dual interleaved LLC resonant converter with half bridge topology of main circuit characterized by high switching frequency, high power density and high efficiency over entire operational range is initially described. Consequently, the proposal for a computer control is given. Given type of control approach has been developed for the laboratory testing of resonant converters. The control system...

H2/H∞ Robust Controller of the Arc Welding Inverter Power

There are a lot of interference sources in the system of the arc welding inverter power. In this paper, a small-signal model which was built by the method of statespace average was quoted. A control system which comprised an interference of load resistance and an interference of power supply fluctuation was built. A H2/H∞ state -feedback controller was designed in the method of LMI. The simulat...

Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding

Arc plasma possesses a constriction phenomenon with a pulsed current. The constriction is created by the Lorentz force, the radial electromagnetic force during arc welding, which determines the energy distribution of the arc plasma. Welding experiments were carried out with ultra-high-frequency pulsed arc welding (UHFP-AW). Ultra-high-speed camera observations were produced for arc surveillance...

Design and Implementation of High Efficiency, High Power Density Front-End Converter for High Voltage Capacitor Charger

High Efficiency Power Conversion Using a Matrix Converter

As demands for energy savings have increased in recent years, inverters are being used in a wider range of applications. Demands for lower cost, smaller size and higher efficiency will continue to further expand the range of inverter applications. However, as a trend toward eco-friendly products increases, some sort of measure is necessary to suppress the harmonics contained in the inverter inp...