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Pneumatic-Electric Motor

Use the cooling air to increase the torque of an electric motor
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[edited (see end of description) after two bad reviews]

Its easier for me to envision this in a flat motor, where the cooling goes between the plates and is emitted out the sides of the motor. The pressurised air is used to further cause the motor to turn, in a "rotary motor" fasion. But it can be done with a regular motor too, e.g. Having a nozzle in the each of the stators pushing the rotors via air pressure.

So basically this coordinates the two actions: 1. The electro-magnetic power being created by consuming power from the batteries or the grid, in order to create rotary movement (power and torque), and 2. The air flow, from the cooling fan or air pump, which is created by consiming power from the same batteries or gird, in order to catch the heat from the motor and to scatter it outside.

pashute, Mar 26 2008


       Forgive me if I misinterpreted your description, but wouldn't the resulting backpressure rob power? At best, the added mechanism would only provide enough extra power to run itself.   

       Remember, moving a rotor via pressurized air is a form of energy transfer. Pressurizing the air in the first place also requires a transfer of energy; where does that energy come from, if not the rotation of the motor? The advantage of air-cooling is that the motor does not have to expend energy pumping coolant medium around, since air flows both into and out of the motor without providing significant resistance. Introduce pressure on one end of the system, and you must also introduce pressure at the other end; if you have to pump it out, you must also pump it in.
Alterother, Mar 26 2008

       Like [Alterother] says, if you can get energy out, you must have put energy in. At least as described. Especially since many motors power their own cooling fan.   

       Two possibilities not mentioned in the idea. If you work everything right, you can get some work out of the heated air when it hits the room temperature air. You could increase cooling if you compress the air, then cool it, and have denser air inside the motor, then capture that energy.   

       But in most motors, the air pressure just isn't enough.
baconbrain, Mar 27 2008

       I think BMW was or is working on reclaiming horsepower by harvesting heat from the exhaust and using that kind of hot/cold thingy (that was thier exact terminology, too) to boost intake compression. Sort of a "thermo-turbo," like. Was it in PopMech, maybe? I can't remember.
Alterother, Mar 27 2008

       The electric motor is run by the energy FROM THE BATTERIES or FROM THE GRID. It can give just so much torque and power as possible via the magnets, their size, the way they are set in space with regards to the other (electro) magnets, and the frequency at which the electromagnets are switched on and off.   

       The air pump or fan, which anyway exists in large electric motors that use air cooling, takes energy from the same batteris or from the same electric grid.   

       The only new effect in this invention, is that instead of just blowing the wind along the motor, in order to cool it, The air is blown INTO the motor, and then it leaves the motor just like air does with a regular air-cooled motor. Actually, now that you mentioned that [Alter] (thanks!) perhaps an air pump, PULLING AIR OUTWARDS would be best for this, leaving the inside with a slightly low pressure, making even less drag for the turning rotors. The idea in this invention is to have the air not only NOT cause drag, but rather, by being pumped in externally, giving an extra push to the rotors, like the "wind at my back" while riding a bike.   

       An analogy would be to have a bucket (the battery) full of water (the energy) and a hole (electromagnets) through which the water is spilling onto a water-mill wheel (the motor) giving us bread (the power and torque). If for some reason you cannot make the hole bigger, you could still draw more water out, by using a hose. In this case the hose (air fan or pump) is being used anyways, just it is not being coordinated to do the work we want. So if we get both spills from the hole to turn the same grain wheel, we get a more efficient and powerful water-mill (rotor) which gives us more bread.
pashute, Mar 28 2008


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