Portable DC Supply Based on SiC Power Devices for High-Voltage Marx Generator

A High Efficiency Low-Voltage Soft Switching DC–DC Converter for Portable Applications

This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...

Development of High-power High-voltage Dc Power Supply Based on Series Resonant

High-power high-voltage dc power supply has been developed based on series resonant converter technology for a MW class RF amplifier. For low-voltage ripple, an IGBT inverter consisting of 1400 V-600 A devices is drives with a maximum switching frequency of 31.2 kHz. A performance test was carried out using an RF amplifier. We examined this power supply under two different conditions. One was w...

Portable Marx Generator for Microplasma Applications

There are many applications using pulsed power such as the triggering of high speed cameras and spectrometers, the processing or chemical analysis of minute material, and the stimulation of cells by electrical pulses. The pulse width and voltage required for each application are different in the range of ns and kV. The energy required is usually in the mJ regime. Here, a novel portable pulse po...

Promise and Challenges of High-Voltage SiC Bipolar Power Devices

Although various silicon carbide (SiC) power devices with very high blocking voltages over 10 kV have been demonstrated, basic issues associated with the device operation are still not well understood. In this paper, the promise and limitations of high-voltage SiC bipolar devices are presented, taking account of the injection-level dependence of carrier lifetimes. It is shown that the major lim...

Portable Nano-Hydro Power Generator for the DC House Project