Why won't 2000w inverter run 900w microwave?
I bought a 2000w Nature Power pure sine inverter from camping world. I had my local rv dealer install the inverter (and a power tongue jack) that I bought a CW. It was $200 in parts and $500 in ...
Forum Discussion
And the answer IS....
PF, POWER FACTOR (Well, sorta.)
The magnetron is a diode that only "fires", conducts current, at "extreme" voltages, 4-5000 volts. The magnetron "fires" as/when the sine wave voltage climbs/reaches ~4000 volts, and then stops "firing" once the sine wave voltage declines to about the same level.
120 "firings/second", 8 millisecond/cycles, but current only flow for maybe 2 milliseconds of that 8 millisecond period.
1000W requires ~8 amps, 1000W within 2 milliseconds requires 32 amps....
PSW inverter is likely not able to supply those peak current levels, needs 12 volts @ 350 amps for those brief peak current periods.
Could be solved via providing a high value capacitor inside the inverter just downstream of the input protective diode. On the other hand the output stage may be saturating at 20A peak current flow.
There are PFC, Power Factor Correcting, inverters in the marketplace.
PF, POWER FACTOR (Well, sorta.)
The magnetron is a diode that only "fires", conducts current, at "extreme" voltages, 4-5000 volts. The magnetron "fires" as/when the sine wave voltage climbs/reaches ~4000 volts, and then stops "firing" once the sine wave voltage declines to about the same level.
120 "firings/second", 8 millisecond/cycles, but current only flow for maybe 2 milliseconds of that 8 millisecond period.
1000W requires ~8 amps, 1000W within 2 milliseconds requires 32 amps....
PSW inverter is likely not able to supply those peak current levels, needs 12 volts @ 350 amps for those brief peak current periods.
Could be solved via providing a high value capacitor inside the inverter just downstream of the input protective diode. On the other hand the output stage may be saturating at 20A peak current flow.
There are PFC, Power Factor Correcting, inverters in the marketplace.
