Performance of a Spacecraft DC-DC Converter Breadboard Modified for LowTemperature Operation

摘要

A 1OW 3OV/5.OV push-pull DC-DC converter breadboard, designed by the JetPropulsion Laboratory (JPL) with a +50 C to +5 C operating range for the Cassini space probe, was characterized for lower operating temperatures. Associated with this low operating temperature range (greater than -196 C) was a variety of performance problems such as significant change in output voltage, converter switching instability, and failure to restart at temperatures below -154 C. An investigation into these problems yielded additional modifications to the converter which improved low temperature performance even further.