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Servo powered permamagnet motor

emulates electric motor but mechanically powered, electronically controlled
  [vote for,

Electrically or mechanically powered servos move the rotor's magnets in and out of position, creating the effect of the electromagnets turned on each in time, in a regular electric motor.
pashute, Jul 08 2015

Springy variable displacement piston pump Springy_20variable_...ent_20piston_20pump
Should work as a pump or hydraulic motor / engine [caspian, Jul 12 2015]


       So basically a wildly inefficient magnetic crankshaft?
pocmloc, Jul 08 2015

       It would't be any more inefficient than a mechanical coupling, save that it'd only transfer up to so much torque, either way.
FlyingToaster, Jul 08 2015

       Ok but it seems inefficient.   

       Isn't this how those fake perpetual motion machines work? The ones that consist of loads of magnets on a wheel, and the wheel spins when you hold a magnet close?
pocmloc, Jul 08 2015

       ^ Dunno; ask Vernon ;D   

       //...move the rotor's magnets...// you mean stator ?   

       The magnets could rotate (like flipping a coin), instead of reciprocating, which would bring more torque to bear and be smoother, passing off from one magnet to the next.
FlyingToaster, Jul 08 2015

       There exist things called "stepper" motors; perhaps this Idea is a variation on that theme.
Vernon, Jul 08 2015

       It says "mechanically powered" so you could use clockwork, a water wheel, a mouse in a harness, etc.
pocmloc, Jul 09 2015

       I didn't see even a hint at "over unity". I have no idea what one would do with such a device but bad science it is not.
Voice, Jul 11 2015

       The springiness of a magnetic coupling could be an advantage if you want to make a variable displacement pump. The pump stroke length would change based on the the fluid pressures - I'm not sure if that would be in a useful way. But you can also change the pump stroke length by using more magnets to tune the average distance between the rotary magnet and the reciprocating magnet.   

       Off to post my idea...
caspian, Jul 12 2015

       The internal motors could be mechanically run by springs or a flywheel system, or chemically (via combustion). Coils would defeat the cause and bring us back into the famous paradox of bigsleep. And Ze No want to go there.   

       The point is this: One of the reasons high efficiency can be achieved especially with BLDC motors although using a variant rotation speed, is because the "firing" of the next stage can be computed to perfection, whereas in combustion motors it is much more reliant on configuration and efficiency is confined to a certain small range of speeds. So, with the perma-magnets being sent to location each in time, computed exactly to the correct timing, possibly we can achieve a good simulation of an electric motor, without loosing too much to heat.
pashute, Jul 12 2015


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