AC/DC Inverter Ouput

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Harky

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Minneapolis
I have a normal DC to AC inverter (bought at Cabela's) which provides a modified square wave output at 120VAC, 60Hz. This is fine for non-sensitive electronic equipment such as lights, cell phone chargers, small appliances, etc. But when I run a ceiling fan (or any motor), the motor is really loud. This is because of the modified square wave. Does anybody know of any devices that can turn a modified square wave into a pure sine wave? I have tried capacitive/inductive line filters with no luck. Or should I spend the money and buy a pure sine wave inverter? Thanks.
 
No device I know of will change a MSW to TSW. I guess it is possible to put a large enough reactor to smooth it out a bit but still would not match TSW. I think the expense of such a reactor would be more than a TSW IMO. The buzzing sound is normal and over time will burn out the motor in my experience. IMO just bite the bullet and spend the 3X more for the TSW inverter.

Maybe someone else knows of a way, but I do not, at least not feasible anyway.
 
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