Eli5 why electric cars don’t have smthn like reverse thrust while braking (wheels spin backwards in hard braking situation)
In: 0
On top of everything that has been said about traction and control problems there are even more issues.
DC motors operate by pulsing electric current to achieve different rpm (rotations per minute). Faster pulses of electricity = faster motor spin. Reversing a DC motor’s spin by changing the current flow from positive to negative would cause havoc with sparks in the coils, sparks in the ball bearings of the motor, and more internal damage. The motor would burn itself up.
AC motors are controlled by limiting voltage and current. You can’t simply turn down the voltage. That causes a “brown out” condition that damages and burns the motor coils. To reverse the spin requires the equivalent of a transmission to change the gears in use. As with gas cars, a sudden shift from Drive to Reverse while traveling at high speed will damage these gears severely.
Latest Answers