Dissipative cryogenic filters with zero dc resistance

Dissipative cryogenic filters with zero dc resistance.

The authors designed, implemented, and tested cryogenic rf filters with zero dc resistance, based on wires with a superconducting core inside a resistive sheath. The superconducting core allows low frequency currents to pass with negligible dissipation. Signals above the cutoff frequency are dissipated in the resistive part due to their small skin depth. The filters consist of twisted wire pair...

Infrared Filters for Cryogenic Receivers

A Bidirectional DC-DC Convreter with Zero Voltage Switching Capability for Energy Storage Application

In this paper, a bidirectional DC-DC converter with high power density for energy storage application is proposed. The presented converter provides power transfer in both directions only with adjusting phase shift angle. Zero voltage switching (ZVS) in both turn on and turn off moments of all switches is the major capability of the converter that makes it suitable for high power applications. Z...

Zero Voltage and Zero Current Switching dc-dc converter with active clamping technique

The zero voltage and zero current switching dc-dc converter with active clamping technique is proposed. By adding a secondary active clamp and controlling the clamp switch moderately, ZVS (for leading leg switches) and ZCS (for lagging leg switches) are achieved without any lossy components, the reverse avalanche break down of leading-leg IGHTs or the saturable reactor in the primary. Many adva...

A Zero-Voltage and Zero-Current Switching Full Bridge DC–DC Converter With Transformer Isolation

A new primary-side-assisted zero-voltage and zerocurrent switching full bridge dc–dc converter with transformer isolation is proposed. The proposed dc–dc converter uses only one auxiliary transformer and two diodes to obtain ZCS for the leading leg. It has a simple and robust structure, and load current control capability even in short circuit conditions. Possibility of magnetic saturation due ...