Originally Posted by
Intruder
I've used many chargers on a 400Hz circuit, with no problems.
Same here, both notebook computer and phone chargers work fine on 400 Hz.
Or, so I'm told...
Originally Posted by
On-MarkBob
A very simplistic way to visualise the problem is this:-
If you laid out 400 paving slabs end to end to a garden shed at the bottom of your garden, you could walk effortlessly to your garden shed. Now consider laying out a pathway of 50 slabs alongside the 400. To take that path would require a great deal of energy as you jump from one slab to the other. 400 slabs in this case represents your 400Hrz. circuit and 50 slabs represent the 50 Hrz. circuit. Thus the energy supplied by the system to power your 50 Hrz. device is increased.
I'm not rightly sure that's how it works with a modern switching power supply. You are saying that a 400 Hz input to a power supply that works on 50Hz somehow delivers more energy? Your slab argument may work for cold fusion or frogs and lily pads but I don't think it is applicable in this case.
And you claim that a little 100 watt computer brick can somehow overload a ground power CB on an airliner?
A 757 has a 90 KVA ground power connection, right?