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dynamo on wheels

Discussion in 'Rivian' started by ezekiel mazzola, Aug 31, 2019.

  1. ezekiel mazzola

    Aug 31, 2019
    3
    So i was reading through the threads and i was see the topic of solar panels on the ev and how they would no work. But i was wondering what if you put dynamo on each of the wheels so when one drives said ev it would produce power. maybe not enough power to charge but increase the battery life by a couple miles,
     
  2. ajdelange

    ajdelange Rookie

    Mar 22, 2019
    10
    There is a dynamo on each wheel. When one backs off on the accelerator they absorb torque from the wheels rather than delivering torque to the wheels as they do in motoring mode and generate electricity to recharge the battery thus recouping some of the energy which would be lost to heating pads and discs were the friction brakes used to slow the vehicle.
     
  3. ezekiel mazzola

    Aug 31, 2019
    3
    whelp another reason i should be buy my glasses instead of being a lazy bum, well thanks for teaching something new about da truck
     
  4. RomanV

    RomanV Rookie

    Aug 31, 2019
    3
    Ezekiel,
    The main reason why a wheel-mounted dynamo/generator would not help to charge an EV's batteries can be explained by Newton's third law of motion. That is to say, for every action there is an equal and opposite reaction. Therefore, mounting a generator on a wheel to create electricity applies a torque load on the wheel. In order for the car to maintain a constant speed, the battery must must supply additional power to the motors to overcome the generator load. So you see, the generator can never add more power than is being taken out of the batteries.
    However, this concept is used by all EV's to slow down as ajdelange mentioned above. The electric motor can act as a generator by applying a reverse torque to the drive wheels, creating a charge to the batteries, and thus slowing the vehicle.
     

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