TURIN,
That 270vDC is actually a variable square wave AC. Boeing call it +/-270vDC.
400 Hz?
Creates a load of heat though during the transforming which is why the boxes that do it are liquid cooled.
This is amazing. Why the heat? Ok, losses but where?
Boeing call it +/-270vDC.
In our terminology a square wave IS NOT DC. Is AC! The household mains supply has a (sinusoidal) waveform with positive and negative peaks. And it's not name DC. Why? Simply because varies the direction of the current.
DC stands for just one direction of current flow. For example, (an analogy):
You are at FL 150 with turbulence. You may climb and descend but the mean level is 150. OTOH you takeoff and climb. There is a continuous "direction" until your cruise level despite any typical turbulence.
I am wondering why the designers used square wave. It's easier to generate (from a DC buss). Question:
What is the voltage and waveform that is supplied by the four gennies?
syseng68k
Would assume that Boeing have done something like that.
Inside Thales? Securaplane? Outsourcing has limitations on that, you know.
1.4Mw capabilty onboard. Serious amount of power and wonder what they use
all that energy for...
Part of it (not so small) is being liquid cooled.
