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Regenerative Braking

  • Conversion of kinetic energy to chemical energy that can be stored back into the battery. 

  • Tesla’s regenerative braking works through the position of the throttle to control the torque applied. This torque could be positive (Forward) or negative (Backwards). 

  • As throttle is slowly let off, motor swaps direction to slow your car down. 

https://www.tesla.com/en_CA/blog/magic-tesla-roadster-regenerative-braking

  • The maximum temperature of heat when brake is applied is around 250 degrees celsius

https://www.sciencedirect.com/science/article/pii/S209044791200069X#:~:text=In%20a%20braking%20system%2C%20the,C%20to%20800%20%C2%B0C .

  • Most common amp usage for a 7 inch brake magnet is 3.2 amps maximum

  • With regen brakes, they are 60-70% efficient 

https://www.elecbrakes.com/blog/can-standard-trailer-wiring-power-electric-brakes/

http://greeninginc.com/blog/test-equipment/how-does-regenerative-braking-boost-efficiency/#:~:text=Figures%20provided%20by%20Eletrek%20show,and%20require%20less%20frequent%20maintenance .

  • Drum brakes can provide more braking force than a disc brake.

  • Drum brakes can last longer because they have a larger area for contact with friction, making it wear out less then a disc brake

  • Disc Brakes can provide a harder clamping force, increasing stopping power

  • Drum brakes are cheaper to manufacture than disc brakes.

  • Rear drum brakes generate lower heat.

https://haynes.com/en-us/tips-tutorials/pros-and-cons-cars-drum-brakes#:~:text=Here%20are%20some%20advantages%20that,to%20manufacture%20than%20disc%20brakes .

 

Brake by Wire

  • Brake pedal sends a signal to the brake control unit which in turn activates the brake. The pedal

  • position and pressure in which applied will decide how hard the brakes work to stop the vehicle

  • An electric pump is used to push hydraulic fluid through the brake lines in order to actually

  • activate the brake (Similar to conventual brake systems)

  • A disadvantage is that this feels like an artificial braking system so it can hard to get used to

  • Most companies use this as a backup option or a side option to conventional brake system

  • Advantages is that it is better at stopping a vehicle then the conventional style because the

  • computer is faster, also Alpha Romeo uses a large brake booster which allows them to stop in

  • 100 milliseconds compared to 300 milliseconds in the conventional style brakes

  • Brake Disk Size Charts (Helpful Links)

  • Disk Brakes Vs Drum Brakes (Helpful Links)

 

https://www.popularmechanics.com/cars/car-technology/a22126727/brake-by-wire/

https://www.motorauthority.com/news/1129985_what-is-brake-by-wire-and-how-do-these-systems-work

 

 

 


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