5 ms·
Not a particularly useful point of reference but the International Space Station's secondary bus (that powers all the devices) is 124Vdc. Stepped down from ~160
by rektide 5y ago
Not a particularly useful point of reference but the International Space Station's secondary bus (that powers all the devices) is 124Vdc. Stepped down from ~160Vdc provided by solar+batteries.
Worth noting that 120Vac goes considerably higher than 120V. 120 is supposed to be the average, root mean squared. This implies to me we might be able to have lower currents if we wanted to go even higher voltage DC, without having to rewire.
One other note, usb-c defined a locking connector in 2016. There's a m2 screw 6.8mm above the flat of one side of the jack.
- mikece 5y ago124VDC on the ISS: I wonder if that means that all electrical items on the ISS have to made to operate with that voltage? I don't think they would want to waste power making heat in order to change 124VDC to 12V, 6V, 9V, 20V, etc.
- rektide 5y agoI'm expecting this is just the bus power to the "modules", the different sections of the ISS. I rather expect most modules probably have a down-converter & run off something like 12, 24, or perhaps the shuttle's 28Vdc. ISS isn't afraid to waste some power. The photovoltaic arrays send power to a "sequential shunt unit", which adds resistive load to maintain a constant voltage/current from the array. Admittedly, not applicable when running off battery, but it shows that power efficiency is not really the priority.