When teslas accelerate how does that not absolutely drain the battery. And also i understand that you can use a diode to deal with inductive feedback but i don’t understand how it works
In: Engineering
DC motors aren’t as susceptible to inrush current because the high torque of a DC motor allows the rotor to keep up with the applied voltage much faster. That, and voltages are ramped up to the motor by the controller, which is a full-fledged computer at that level.
Accelerating hard does indeed pull a shitload of current, but the controller distributes that load across all of the cells in the battery, meaning each individual cell is providing a carefully computed amount of current. The controller will not allow the cells to be overcurrented.
As for inductive feedback, normally if you don’t want to deal with that energy you would have a beefy diode to prevent the energy from getting back to the battery, and a load bank of some sort to dissipate the energy. An EV, however, uses this energy to recharge the battery. The feedback current is shunted back into the controller, which converts the voltage and current on the fly to what the batteries need to charge. If it can’t use the energy, or regen braking is commanded off, it will simply disconnect the cables internally, and the motor will simply freewheel.
Latest Answers