- Sep 16, 2019
- Reaction score
- Porsche Taycan 4S+ 2020
In theory you have drag losses, because the moving magnet produces a current inside the motor which shows up as a voltage on the outside. If the wire is cut, the current stops, but voltage persists.It shouldn’t. The rotor magnets induce a voltage in the stator windings (when rotating) but current would require a completed circuit. If the motor leads aren’t connected, there shouldn’t be any current and no additional resistive load from the motor beyond bearing friction (and rotor inertia for acceleration).
Practically, the motor is always connected so you have to handle the power in your power electronics with more losses.
When I drive my Taycan, I can sometimes see a little green recup on the power meter, even with recup options off and no pedal action...