Why is my inverter freaking out?
I have a 1500watt HF MSW. I don't use it often, so I am not acquainted will all of its oddities. Last year I tried to use it with my 65w fridge at it would not work (alarm sounded). Although it ...
Forum Discussion
road-runner wrote:MrWizard wrote:I'd sure like to see a picture of their waveform. I've never found an MSW inverter that doesn't follow the 4-step (+v,zero,-v,zero) waveform with nothing else in-between. The only difference I've seen is that tripplite calls it "PWM sine wave". I'm not meaning to knock tripplite MSW inverters, they have good reviews. Without seeing a picture of the output it's hard for me to imagine what's different about them.
Tripplite powerVerters
are technically MSW and are listed as such
BUT are specifically designed to run motors and actually have a modified sine wave
NOT a Square wave, mine has been running my fridge for over 5 years
they include heavy transformers and filtering
they are NOT $99 Choppers making square wave with lots of noise
Mr Wizard is right on the money - square wave. Until an inductive load was introduced. Upon which the scope screen looked like gorilla scribbling. Most MSW machines will revert to square wave at high loading. Then there's HF grade - Picasso Wave. Stare at that wave and you'll fall off your stool.
