Cold start surge current limiting system for a hydrazine...

Details Cold start surge current limiting system for a hydrazine... Cold start surge current limiting system for a hydrazine...

H - Electricity

05

B

342/47

H05B 1/02 (2006.01) F02K 9/56 (2006.01) H02H 9/00 (2006.01)

Patent

CA 1207873

COLD START SURGE CURRENT LIMITING SYSTEM FOR A HYDRAZINE THRUSTER AUGMENTATION HEATER Abstract An electrothermal hydrazine thruster passes hydrazine through a catalyst bed and an augmentation heater. The augmentation heater includes an electrical heating element powered by a satellite battery. A load resistance is coupled in series with the heating element to reduce the current through the electrical circuit including the heating element to a safe level. A switch coupled across the load resistance is closed to bypass the load resistance after the heating element heats up and its resistance increases to a value sufficient to allow the battery circuit to tolerate the current level which results from this change in resistance and from the bypassing of the load resistance means.

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