3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
jlaustin wrote:
Professor, it's been my observation that the microwave "works" with the inverter, but it definitely seems to have lower power output (takes longer to accomplish the same heating). It even sounds different running on the inverter. Could you explain a little further (in plain English! HAHA!) what's going on with the microwave?
Regards,
John
Well, apparently Bob and I are looking at the lack of performance differently.
My explanation is that the magnetron is powered by a voltage step-up transformer and then a half-wave voltage doubler. The magnetron requires something like 1 KV to operate properly and produce the 2450 MHZ that is the ideal cooking frequency.
A modified sine wave has a peak power equal to the RMS of a conventional sine wave. The transformer and voltage doubler circuit in the microwave rely on the peak voltage in a sine wave to produce the needed (approximate) 1KV plate voltage. With a MSW as the supply the expected plate voltage will be reduced to approximately 700 volts. Thus the magnetron will not oscillate at 2450 MHZ nor produce as much RF energy.
Now, all that said, I really know very little about microwave ovens. My wife is the chief operator of those devices. My explanation is based on assumptions of how I believe the device actually operates as the result of a dissection of a specimen some 15+ years prior. Circuit designs change and perhaps the internals of newer microwave ovens are different than my old cadaver was.
