Regenerative Braking

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Regenerative Braking
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What is Regenerative Braking?

• Takes the momentum of a electric vehicle and
  recharges the battery while braking

Motor switches between Motor /Generator
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Components to turn an E-Bike into a Hybrid Bike

• Motor - motor/generator
• Control box - braking, generator, recharge
• Brakes 2 stage brakes

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Drawbacks

• Expensive
• Extra Possible extra energy storage
• Is it worth it?

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Braking Energy

• Convert Kinetic energy into Electrical energy

• Less energy stored the longer the rider brakes
• Faster braking could lead to friction braking

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Braking Energy

• 190lb, 20mph, 0 grade needs 330W to overcome drag
• Can recover 3200W from if stopped from 20mph
  rider
• Significant energy

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Problems

• Coaster problem?
• What if rider doesnt brake?
• How to store energy so quickly?
• Ultra-capacitor?
• Flywheel?