Though, I do need to ask, why don't they just use the simple rack and pinion gearing system instead of induction motors?<br>Is it because they want reliable smoothness in the ride that is given from two repelling magnetic fields. (something the rack and pinion also gives.)<br>Or because induction motors are somewhat expensive and looks far cooler and is therefor most likely easier to market to non engineers.,(reply>), Unknownety Linear as in no rotational movement whatsoever to begin with. Instead of creating rotating magnetic field with concentric coils like in a motor, you have them arranged in line (well, perpendicular to it),(reply>), Linear as in rack an pinion, or lead screw?<br>As the lewd screw is probably going to lower the speed significantly.<br>But yes, there are many solutions that might work.,(reply>), I can imagine linear (not actually induction if it's synchronous) actuators being cheaper, lighter and smaller except for development costs