dc motor

Thread Starter


Joined Nov 21, 2011
I have 1.9 hp dc hoist motor that I am using a converter to ac to dc can anyone tell me what the dc motor amps will pull, so I can get a converter to run it.


Joined Jul 9, 2011
That's about 1.42kW. If the rated motor voltage is known you can calculate the current.
How do you know it's 1.9HP? Is there a plate on it with more informations?


Joined Sep 9, 2010
One HP is something like 750 watts, so you need 1500 watts plus a safety margin of 20% or more, or 1800 watts. When you include some inefficiency in the conversion, you're getting up to some pretty serious wattage. If your mains are 120v, you'll need a 20A circuit, not the usual 15A residential circuit. You didn't mention how you plan to go from AC to DC. It's going to be pricey with that much power.