Alternatively you can run it from a chopper drive, but the high resistance meansyou'll need at least 18V supply and it won't perform very well. Generally you'dpair a low resistance motor with a chopper drive and get high speed performance.
You top-flight high performance big stepper motor on a large CNC machine might be0.5 ohm windings at 5A, driven from a chopper drive powered from 100V DC. 2.5Vgoes to the winding resistance, the rest overcomes back-EMF and makes the thingreally fast and powerful (hundreds of watts mechanical, despite only 12W dissipatedin the windings). Drive the same motor from 2.5V and you'd be lucky to see 60rpm!
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