AC motor speed controller on a MSW inverter
I want to power a 6 amp 115vac 4.5 inch angle grinder from my 800 watt MSW inverter, but have the ability to significantly slow down the rpms. I cannot justify a variac of adequate capacity, but ther...
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Well I re installed my 800 watt msw inverter and tried it with the speed controller and grinder. Nothing smoked.
The grind er did not go as slow as it does on psw, but slow enough.
I put dc clamp meter over cable. Full speed unloaded is 13.4amps dc.. only on firing it up or loaded hard does draw exceed 40 amps dc. Id never need this much juice for foiling fins. At minimum speed I need to spin flap sander. About 4.4 amps dc loaded.
So other than overestimating amp draw by a factor up to 10 or so, all is well.
The grind er did not go as slow as it does on psw, but slow enough.
I put dc clamp meter over cable. Full speed unloaded is 13.4amps dc.. only on firing it up or loaded hard does draw exceed 40 amps dc. Id never need this much juice for foiling fins. At minimum speed I need to spin flap sander. About 4.4 amps dc loaded.
So other than overestimating amp draw by a factor up to 10 or so, all is well.
