Regen braking on ice.

almillar

Having not driven the vehicle in question however the Regen cannot possibly work if the wheels are locked because of physics. I would assume then the regen system whilst it may retard speed it shouldn't stop the vehicle completely.

You've got the question the wrong way round. He's not asking if the car will regen when locked up, he's asking if regen will cause the lockup. It won't, if used smoothly, just like engine braking, and brakes, in an ICE car.


The i3 does actually bring you to a full stop, if you just take all feet off the pedals. Of all the EVs I've driven, it's the most 'agile and responsive', to the point that you can rarely take your foot off the pedal!
Most EVs act like auto ICE - they'll crawl eventually with no throttle input. Teslas have a choice I believe. It's all down to how they're configured, rather than cost or anything fancy.



And no, if the wheels are locked, that'll be zero regen.

Jackmydad

And it depends how smart the regen is.
No reason that the car shouldn't compare the road speed signal from the wheels, with the expected rpm at the motor / generator, and lessen the braking effect if the wheels are slipping on the road/

Scrapit

almillar wrote: »

You've got the question the wrong way round. He's not asking if the car will regen when locked up, he's asking if regen will cause the lockup. It won't, if used smoothly, just like engine braking, and brakes, in an ICE car.


The i3 does actually bring you to a full stop, if you just take all feet off the pedals. Of all the EVs I've driven, it's the most 'agile and responsive', to the point that you can rarely take your foot off the pedal!
Most EVs act like auto ICE - they'll crawl eventually with no throttle input. Teslas have a choice I believe. It's all down to how they're configured, rather than cost or anything fancy.



And no, if the wheels are locked, that'll be zero regen.

You've got the answer the wrong way round.;) I'm suggesting what ever is drawing the energy from the rotating wheels will not have enough resistance to stop or lock the wheels. That couldnt be energy effcient as there would be no conversion of kinetic energy to stoeed/electric energy.
As you say, locked wheels, no regen.
The vehicle stopping is probbably due to no input into the motor and the resistance from that giving effectively "engine braking".