| Inverter Sizing PC
When you start a portable tool, there is an inrush current to the motor to get it "going", principally to overcome inertia and the fulx the motor. Once the machine is running, the current drops. At no load, there's still some current drawn.
The peak is dependant on many things like the windings, state of the brushes, quite a few odds and ends. I'd allow at least 50% more current to start the PC which the inverter needs to supply. So the inverter capacity would need to be 1.5 x 110 x 3.17 = 523VA. Most commercial units are 500VA and then 750VA. 500VA is a bit on the lean side.
The PC can also run from a 110V DC supply, so your inverter's output could be pretty rough and the PC would keep on going.
To obtain 110VDC, you need a DC-DC converter, similar to that fitted to modern car audio amplifers. I haven't looked for any commercially, but a market such as the US should be able to produce such a device.
Cheers for now! |