Regenerative breaking on MMM

[johnrobholmes]

It would be easier (and probably more efficient) to use a nice brushed motor as a generator (dynamo) direct from the engine. Use this to charge your battery and run the electric drive system.

[tc3_racer_001]

like an alternator???

[VintageMA]

You may want to consider looking into how regenerative braking is performed on trains and subways. Ya know that burst of heat you feel coming from a subway is from the motor being used as a generator and dumping it's load through huge resistor banks. Then there are some systems where the generated energy is dumped back into the grid.

There may be more documentation available out there on how this is done - and much easier with a brushed motor (as mentioned) - then with a BL one.

[BrianG]

Originally Posted by johnrobholmes

It would be easier (and probably more efficient) to use a nice brushed motor as a generator (dynamo) direct from the engine. Use this to charge your battery and run the electric drive system.

Could use a BL motor and use a 3-phase bridge rectifier, since that is somewhat how an alternator works...

No matter what, the energy you expend will be more you capture because of efficiency losses. But, if your biodiesel engine can be freed from the stop and go part (and the inefficiencies that entails), maybe it will overcome the inefficiency of the added electric motor drag.

That's the idea.

Originally Posted by BrianG

Could use a BL motor and use a 3-phase bridge rectifier, since that is somewhat how an alternator works...

No matter what, the energy you expend will be more you capture because of efficiency losses. But, if your biodiesel engine can be freed from the stop and go part (and the inefficiencies that entails), maybe it will overcome the inefficiency of the added electric motor drag.

nah, each point of the conversion has loss. Fuel to mechanical to electrical to battery to electrical to mechanical. I want to go from fuel to mechanical as efficiently as possibly with some waste to electrical to allow the mechanical to be as simple as possible. More simple than the average card with a 5 speed tranny.

Originally Posted by johnrobholmes

It would be easier (and probably more efficient) to use a nice brushed motor as a generator (dynamo) direct from the engine. Use this to charge your battery and run the electric drive system.

[auto2]

use AIR flow to recharge the battery . also install a set of bicycle pedals where the gas and brake belong . or use virbration to charge the batterys. i saw a flashlight you had to shake to build up a charge. the shocks could do that.

Originally Posted by auto2

use AIR flow to recharge the battery . also install a set of bicycle pedals where the gas and brake belong . or use virbration to charge the batterys. i saw a flashlight you had to shake to build up a charge. the shocks could do that.

If I were going to collect waste energy, it would be from the heat off of the cylinder.

[BrianG]

Originally Posted by auto2

...or use virbration to charge the batterys. i saw a flashlight you had to shake to build up a charge. the shocks could do that.

Enter Bose (yes, the same Bose that does audio): http://auto.howstuffworks.com/car-suspension9.htm

The flashlight you shake is basically a piston-like motor. Instead of the rotor turning, it goes up and down. Either way, it induces a voltage in a coil, just not nearly as well as a rotary motor.

[rabosi]

Originally Posted by BrianG

Enter Bose (yes, the same Bose that does audio): http://auto.howstuffworks.com/car-suspension9.htm.....

If it works as advertised that will be awesome. nice find.