I have a 75 watt dc to ac power converter (that I want to use while car camping) and an aerobed with an AC motor - UL sticker on motor says: 120v AC, 60 Hz, 1.0 amps. Will this power converter provide enough juice to inflate my aerobed?
2006-09-30 06:46:53 · 4 answers · asked by its_kgd 1 in Science & Mathematics ➔ Physics
Depends on whether the ratings are the same. AC electrical measurements are normally done by RMS, this is the square root of the average of the squared voltages, currents power, ect. RMS for a two phase pure sine wave power source is about .707 peak voltage, so a 120V ac power source actually has peak voltages of about 169.73V. If all the ratings you gave are RMS then you are way underpowered for your aerobed, which takes 120 Watts RMS, if the amperage for the motor is the peak, which is occasionally though not often used, then you are still at 84 Watts for your bed, which you might be able to get away with. If the 75 watt inverter is a peak wattage you're even further behind since that would only be 53 watts RMS.
It's also possible that the inverter is regulated, so no matter what load you hook it up to it will only put out 75 watts of power, and will not overheat and fry itself. If this is the case then you can hook your bed up to it no problem, it will just take longer for it to fill. However if it's not regulated, and you hook it up to your bed it is possible that it will fry itself, or worse yet, start a fire.
It's ultimately your call what you choose to do but I would personally just bring a hand pump, or try to find a 120 Watt RMS DC inverter.
2006-09-30 07:20:51 · answer #1 · answered by santacruzrc 2 · 0⤊ 0⤋
It may. You have to try it out. 1 Amp may be a max current. At normal loads it may only drawa half an amp. Then you are ok. Usually the invertesr have overload protection. Some invertesr will supply 150% of the rated watts for a short period. SO try it out.
2006-09-30 07:14:42 · answer #2 · answered by Dr M 5 · 0⤊ 0⤋
Watts=Voltage x current
120= 120 x 1
NO it won't
2006-09-30 07:10:54 · answer #3 · answered by Traveler 3 · 0⤊ 0⤋
maybe no one will answer you because we cannot understand what are you saying
2006-09-30 07:08:25 · answer #4 · answered by janette 1 · 0⤊ 0⤋