LOW INPUT VOLTAGE CONVERSION.
Quarterly progress rept. no. 2, 1 Oct-30 Dec 62,
HONEYWELL INC HOPKINS MN
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The major effort was concentrated on the tran sistor approach and the magnetohydrodynamic approach. Work on the transistor approach was directed toward circuit design, transformer and reactor design, transistor parameter measure ments, parts procurement, and breadboard fabri cation. The design switches the transistors rapidly with a large current pulse and then pro vides current feedback drive proportional to load current which maintains transistor opera tion in the saturation region. The dc-to-dc magnetohydrodynamic converter was investigated. A sample feasibility device was designed by a method of successive approximations. The design was initially directed toward a small device but calculations showed that the hydraulic losses were too large. High efficiency was the para mount design criteria and satisfaction of this requirement resulted in a design over 10 ft in diameter, 3 ft thick, and having a power output of 73 kw. To approach the desired 75 effi ciency figure, the size must be very large as indicated previously. Therefore, it was con cluded that the dc-to-dc magnetohydrodynamic converter could only be practical where large weight and size can be tolerated. Author