270 VDC power in aircraft
270 VDC power in aircraft
(OP)
Hi,
This is on a similar subject to my other post today. Some aircraft under development ,e.g. The JSF, are developing a 270V DC power system rather than 115V 400Hz used on previous aircraft. Does anyone have an explanation for this change in power system design...what are the advantages? Could the change be driven mainly by the emergence of powerful DC motors which can replace hydraulic actuators?
This is on a similar subject to my other post today. Some aircraft under development ,e.g. The JSF, are developing a 270V DC power system rather than 115V 400Hz used on previous aircraft. Does anyone have an explanation for this change in power system design...what are the advantages? Could the change be driven mainly by the emergence of powerful DC motors which can replace hydraulic actuators?







RE: 270 VDC power in aircraft
RE: 270 VDC power in aircraft
Current ratings are only slightly higher than the existing runs, but only 2 wires are needed instead of 3 or 4.
Additionally, by minimizing the AC runs in the aircraft, the overall EM emission level should be less.
TTFN
RE: 270 VDC power in aircraft
BTW, 115 V rectified (even in a three phase system and with smoothing capacitors) do not produce more than abt 170 V DC. So I think that the system voltage is more like 115*sqrt(3) or around 200 V. It will give you close to 270 V.
RE: 270 VDC power in aircraft