Development of a 250 Ampere Transcalent Rectifier. Supplementary Report.
Abstract
During the investigation the water was frozen and its flow to the evaporator limited by the rate at which ice in the wick could be melted. External thermocouples on the heat pipes and the forward voltage of the junction were monitored to determine the transient thermal impedance of the transcalent rectifiers. The experiment was conducted by applying an average current of 250 amperes to the transcalent rectifiers in an ambient of -25C. The data was analyzed with respect to the thawing of the heat pipes. Two transcalent rectifiers were successfully cycled 55 times at their rated current before discontinuing the test. Each cycle was of sufficient length for the rectifiers to be in thermal equilibrium with their environment and consisted of 15 minutes on -15 minutes off. A summary of the 400 ampere RMS transcalent thyristor design which was initiated during the performance of this contract. The silicon chip design incorporates an insulated emitter gate junction structure which will be located inside the wall of the heat pipe so that the periphery of this junction can be cooled. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1971
- Accession Number
- AD0722813
Entities
People
- S. W. Kessler