12v Battery To Operate 120vdc Motor?

I have a 120vdc treadmill motor that has a motor controller board and a transformer to operate it. My question is is there any way to rigg it up to a 12v deep cycle battery. I was thinking all i would need is some sort of step up transformer 9-1 if they make it or 10-1. I would aslo like to have speed control which i assume would work through lowering the voltage. It runs fine off the 12v batter just not near the rpms i need. I know it will drain the deep cycle very fast but im not worried about that.
      


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