Bry5on
Well-Known Member
- Joined
- Jan 25, 2021
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- '70 electric Jaguar, ‘21 Taycan 4S CT
there are no extra components required, it’s using what’s built into the motor. At high speed, your existing motor always does this (field weakening). Your motor is anywhere from say 60-95% efficient, so it already dumps a lot of heat that comes from the stator coils. The cooling system in the motors is the primary thing that allows the taycan to do repeated acceleration runs, they do generate significant heat, not anywhere near an ICE but still significant - more than several your microwave for example.I have not seen anything to suggest the Taycan uses the motors for braking outside of recup. I’m not sure why they would add additional components for the extra heat dissipation when the friction brakes are already there?
I’ve also never seen a motor dissipating any substantial heat on its own in the wild. Every application I’ve seen (1000+?) had either a regen front end or resistors (or nothing and had to coast [mostly]). Not saying it’s not out there, just that I’ve never seen it.
How much power could you dissipate through the stator? And for how long?
for clarification, only permanent magnet AC motors or reluctance motors can do this. DC motors would need a resistive or similar load to dissipate heat. Similar with inductance motors, even though they’re AC.
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