What type or grade of motor do I need?

I'm having a prototype machine build which beats rugs. It's pretty simple, it's shaped like a lawn mower with the same idea - rather than blades going round there's heavy leather straps that rotate and beat the rug (back of the rug). In doing so there is quite a lot of resistance. I need it to rotate at high speed even with the resistance and to not burn out. So far we've had a cheap engine from a lawn raker but one which produced 750watts burn out after a few minutes, a (in my opinion ridiculous) 50watt "high speed" motor which didn't go fast enough, then another slightly better one which worked ok but burnt out after 10 minutes. I'm worried the company that is building the prototype are messing us about trying to save costs or simply don't have a clue. I'd imagine we need a 1kw or 1hp motor - complete guess - but better that than mess around with cheap, low watt motors. But apart from that what type should we have for this type of job to work and be robust. Ideally we'd be able to adjust speed. So AC, DC? Power? Any help appreciated. The first motor was a cheap (£20 replacement parts) lawn-raker plastic thing. I don't know if it burned out because of lack of ventilation or over-heating due to the resistance. So saying we need 1hp - are there motors which deal with overload/friction/resistance better than others?

Asked By: Ryan M - 1/31/2013
Best Answer - Chosen by Asker
I mostly agree with Billrusell42. Speed adjustment will add considerably to the cost, but it may be worth the cost to build a prototype with speed adjustment to refine the design. The least expensive speed adjustment will probably be provided by a 3-phase motor and a variable frequency drive unit that takes single-... More
Answered By: VShade - 1/31/2013
Additional Answers (3)
What is not known is what speed you want the actual beater to move. And what gears to you have in place to produce that speed from the motor... More
Answered By: billrussell42 - 1/31/2013
To gain a better idea of how much energy you would need to input try beating a carpet for five minutes non stop yourself... it is hard work so at least 1 horse power I'd say. A good reliable motor is needed; also why not elevate the rotor part of your gadget so the strap drag resistance is lowered.
Answered By: WENDEL HOMES - 1/31/2013
Look up LEESON 113938 at the Google search. This is a single phase AC motor that spins at 1725 RPM and has manual overload protection. It has very high torque and has low slip under load. So it will hold speed fairly constant when loaded down. Glad I could help.
Answered By: Triple-MIGHT - 1/31/2013
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