US 11,702,222 B2
DC contactor input into RAT auto-deploy
Jordan K. Vanevenhoven, Rockford, IL (US); Jeffrey D. Myroth, Roscoe, IL (US); Shane R. Traser, Rockford, IL (US); Jef William Good, German Valley, IL (US); John N. Buzzard, Rockford, IL (US); and Kyle Ives, Loves Park, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Mar. 18, 2020, as Appl. No. 16/822,840.
Prior Publication US 2021/0292001 A1, Sep. 23, 2021
Int. Cl. B64D 41/00 (2006.01); H02J 3/38 (2006.01)
CPC B64D 41/007 (2013.01) [H02J 3/381 (2013.01); F05D 2270/09 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A system comprising:
a first AC bus configured to supply power from a first AC power source;
a second AC bus configured to supply power from a second AC power source;
a first transformer rectifier unit (TRU) connecting a first DC bus to the first AC bus through a first TRU contactor (TRUC);
a second TRU connecting a second DC bus to the second AC bus through a second TRUC;
a ram air turbine (RAT) automatic deployment controller operatively connected to the first TRUC and to the second TRUC to automatically deploy a RAT based on the combined status of the first TRUC and the second TRUC
an AC essential bus tie contactor (AETC) selectively connecting between an AC essential bus and the first and second AC busses;
an AETC controller connected to switch the AETC between a first state connecting the AC essential bus to the first AC bus and a second state connecting the AC essential bus to the second AC bus
a first DC essential bus connected to the first DC bus through a first essential contactor (EC); and
a second DC essential bus connected to the second DC bus through a second EC, wherein the RAT automatic deployment controller is operatively connected to the first essential contactor and to the second essential contactor to automatically deploy the RAT based on the combined status of the first TRUC, the second TRUC, the first EC, and the second EC.