highland58

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This is a very detailed look at how regenerative braking works:
Hybrid and EV Regenerative Braking Systems
He has all of the components on a test bench opened up, he goes into great detail and demonstrates the workings very clearly.
0:00 Introduction
Components involved at 0:50
Motor Rotor at 1:25
Motor Stator at 1:56
Stator connections at 2:15
Electromagnetic induction example #1 at 3:40
Electromagnetic induction example #2 at 5:19
PicoScope oscilloscope 3-phase stator output measurement at 6:20
PicoScope oscilloscope 3-phase stator output waveform interpretation at 8:50
MUST SEE! Electric motor loading (braking) example at 12:15
MUST SEE! Letting the smoke out at 14:10
Regenerative braking electrical/mechanical summary at 14:40
Transmission shifter "B" Braking position at 17:30
Negative torque at 18:28
MUST SEE! MG1 driving MG2 with 3-phase induced voltages at 19:39
The reverse motor rotation at 22:00
Low voltage efficiencies at 22:45
Video summary at 23:49
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timbop

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This is a very detailed look at how regenerative braking works:
Hybrid and EV Regenerative Braking Systems
He has all of the components on a test bench opened up, he goes into great detail and demonstrates the workings very clearly.
0:00 Introduction
Components involved at 0:50
Motor Rotor at 1:25
Motor Stator at 1:56
Stator connections at 2:15
Electromagnetic induction example #1 at 3:40
Electromagnetic induction example #2 at 5:19
PicoScope oscilloscope 3-phase stator output measurement at 6:20
PicoScope oscilloscope 3-phase stator output waveform interpretation at 8:50
MUST SEE! Electric motor loading (braking) example at 12:15
MUST SEE! Letting the smoke out at 14:10
Regenerative braking electrical/mechanical summary at 14:40
Transmission shifter "B" Braking position at 17:30
Negative torque at 18:28
MUST SEE! MG1 driving MG2 with 3-phase induced voltages at 19:39
The reverse motor rotation at 22:00
Low voltage efficiencies at 22:45
Video summary at 23:49
That guy is clearly skilled at teaching. Thanks for posting!
 

Kamuelaflyer

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This is a very detailed look at how regenerative braking works:
Hybrid and EV Regenerative Braking Systems
He has all of the components on a test bench opened up, he goes into great detail and demonstrates the workings very clearly.
0:00 Introduction
Components involved at 0:50
Motor Rotor at 1:25
Motor Stator at 1:56
Stator connections at 2:15
Electromagnetic induction example #1 at 3:40
Electromagnetic induction example #2 at 5:19
PicoScope oscilloscope 3-phase stator output measurement at 6:20
PicoScope oscilloscope 3-phase stator output waveform interpretation at 8:50
MUST SEE! Electric motor loading (braking) example at 12:15
MUST SEE! Letting the smoke out at 14:10
Regenerative braking electrical/mechanical summary at 14:40
Transmission shifter "B" Braking position at 17:30
Negative torque at 18:28
MUST SEE! MG1 driving MG2 with 3-phase induced voltages at 19:39
The reverse motor rotation at 22:00
Low voltage efficiencies at 22:45
Video summary at 23:49
Thanks! :)
 

MailGuy

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His tear down on the Bolt battery and motor are also awesome views. Search weber state <insert car> youā€™ll find a lot worth watching.

The MachE motors are similar to the Bolt in that the drive axles go through the motors.
 

ChasingCoral

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If you can't tell whether the car in front is stopped then in my opinion you shouldn't be driving
Well that sure rules out lots of American drivers!

I was rear-ended sitting at a stale stoplight, brake applied, and in the dark (so brake lights really obvious). For the oblivious, nothing is enough. Brakes lights while slowing or stopped using regeneration or one-pedal-driving? Please!
 


zhackwyatt

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If you can't tell whether the car in front is stopped then in my opinion you shouldn't be driving
I don't think that is fair at all. Especially at night driving on the freeway there are tons of red lights in front of you. And it is sometimes hard to tell if the car is stopped or not due to less depth perception at night. Which is why I really like the 3rd brake light.
 

SnBGC

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Yes. You will get smoother instantaneous transfer of forward acceleration to braking without the corresponding rev in RPM's. The motor and car will both actually slow down creating an immediate deceleration force that can seamlessly transition to full forward acceleration just by moving your foot in the other direction. Think of it like driving a go-kart without brakes.

It won't be limited to unbridle either. You'll get the same feeling in all modes I would expect, just to varying degrees.
Yes. It is pretty much the same in all mode with 1 pedal turned on. If you get the vehicle up to speed and it's safe to do so.....you can turn off 1 pedal mode and take your foot off the accelerator and then toggle between the 3 "experiences" to gauge the level of regen. It's fairly dramatic. Unbridled is the most aggresive. Whisper is practically nothing and Engage is somewhere between.

Engage mode with 1 pedal off is most like my Focus Electric in D.
Unbridled with 1 pedal off is most like my Focus Electric in L.
Whisper is unlike any setting that am aware of to date.

I can't imagine spirited driving in the twisties in any other setting but 1 pedal Unbridled. The way this car handles corners is amazing.....especially increasing radius corners.....so fun!
 

Badger_Prof

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About four years ago, I got my Bolt EV. For the two or three months before the release of the Bolt and the two or three months after the release, one of the most common discussions on the Bolt Owners/Interested Facebook page was almost identical to the discussion in this thread. Then, for the next two years, new members of the Facebook page would ask the same questions and the hypothesizing would start all over again. Turns out there were objective answers to all of the questions about regen, one pedal driving, brake lights with one pedal driving, etc. There will also be objective answers to these questions for the Mach-E. Maybe these answers will be provided prior to release of the Mach-E or maybe will not be known until after the release, but they will be known (hopefully soon). Maybe the answers for the Mach-E will be the same as for the Bolt, maybe not. In the meantime, it is interesting to watch the same hypothesizing that occurred around the release of the Bolt. I predict with a high level of confidence that the hypothesizing and inquiries will continue long after the actual answers are known for the Mach-E. It would be helpful if Ford were to provide the objective answers to these relatively straightforward questions to give us something more to KNOW prior to release.
 

ChasingCoral

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Well we now know this much so far:
Within each mode you can turn on and off 1PD, lights, and sounds. So far I see no other options.

Screen Shot 2020-10-19 at 10.26.41 PM.png
 
OP
OP
ajmartineau

ajmartineau

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OTA update, let me pick my level of ReGen. independent of drive mode.
 

Kamuelaflyer

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Meanwhile, at Brand T:

https://electrek.co/2020/10/27/tesla-removes-regenerative-braking-strenght-option-new-cars/

Tesla mysteriously removes regenerative braking strength option in new cars
Fred Lambert
- Oct. 27th 2020 1:30 pm ET

@FredericLambert



Tesla-regen-braking.jpg


Tesla has mysteriously removed the option for drivers to control the strength of the regenerative braking capacity for new cars.
The reason behind the change is not clear.

Regenerative Braking
Regenerative braking, which uses an electric vehicleā€™s electric motor to convert kinetic energy into electricity to charge the battery pack while slowing down the vehicle, is a flagship feature of electric cars.
Itā€™s one of many features that makes them more efficient than cars with combustion engines and it also results in less wear on your brakes.
However, it comes with a learning curve to get use to it, especially for people who have never driven a manual transmission since downshifting has a similar feel to regenerative braking.
Most electric cars offer a solution to this learning curve by making different ā€œstrengthsā€ of regenerative braking available in order to ease people into using the feature.
Depending on the strength, electric cars slow down more or less aggressively with regen braking when the driver lets go of the accelerator pedal.
With an electric car equipped with a powerful regen braking system, an experienced EV driver can basically do what is called ā€œone-pedal drivingā€ and only use the accelerator pedal.
Teslaā€™s Regen Braking
Tesla had one of the most simple regen braking settings: standard and low. Thatā€™s it.
However, new Tesla buyers are now reporting that the automaker has removed the option of choosing the regenerative braking strength.
Owners of new Tesla vehicles built in the last few months are reporting on the forums (Reddit and TMC) that they donā€™t see the option in the settings anymore and some of them are being told by Tesla service centers that it is not a bug.
Tesla is now delivering new cars with the regen strength being standard without the option to put it to ā€˜lowā€™.
The automaker is not taking away the option for vehicles who had it before even with the latest software updates.

It appears to only affect new vehicles delivered since around June 2020.
As usual, itā€™s hard to get official information from Tesla on the change since the automaker doesnā€™t have official press communications anymore.
Electrekā€™s Take
This is a strange move. The standard setting is definitely more efficient and most people should just try to get used to it.
However, the low setting was useful for first-time electric vehicle owners and some people also preferred the setting when driving in the snow or other bad conditions.
Living in Quebec, Iā€™ve driven Tesla vehicles in plenty of icy and snowy conditions and never felt the need to put regen braking in low, but I use good winter tires, which I think is the thing that makes the single greatest difference for safe winter driving.
But I do understand why someone would want less aggressive regen braking on a slippery road.
I donā€™t see why Tesla would not want to give drivers the option to use it as long as you understand its impact on efficiency.
What do you think? Let us know in the comment section below.
 

RonTCat

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Meanwhile, at Brand T:

https://electrek.co/2020/10/27/tesla-removes-regenerative-braking-strenght-option-new-cars/

Tesla mysteriously removes regenerative braking strength option in new cars
Fred Lambert
- Oct. 27th 2020 1:30 pm ET

@FredericLambert



Ford Mustang Mach-E Knowing Your Mustang Mach-E: Driving Experience Modes & One-Pedal Driving Tesla-regen-brakin


Tesla has mysteriously removed the option for drivers to control the strength of the regenerative braking capacity for new cars.
The reason behind the change is not clear.

Regenerative Braking
Regenerative braking, which uses an electric vehicleā€™s electric motor to convert kinetic energy into electricity to charge the battery pack while slowing down the vehicle, is a flagship feature of electric cars.
Itā€™s one of many features that makes them more efficient than cars with combustion engines and it also results in less wear on your brakes.
However, it comes with a learning curve to get use to it, especially for people who have never driven a manual transmission since downshifting has a similar feel to regenerative braking.
Most electric cars offer a solution to this learning curve by making different ā€œstrengthsā€ of regenerative braking available in order to ease people into using the feature.
Depending on the strength, electric cars slow down more or less aggressively with regen braking when the driver lets go of the accelerator pedal.
With an electric car equipped with a powerful regen braking system, an experienced EV driver can basically do what is called ā€œone-pedal drivingā€ and only use the accelerator pedal.
Teslaā€™s Regen Braking
Tesla had one of the most simple regen braking settings: standard and low. Thatā€™s it.
However, new Tesla buyers are now reporting that the automaker has removed the option of choosing the regenerative braking strength.
Owners of new Tesla vehicles built in the last few months are reporting on the forums (Reddit and TMC) that they donā€™t see the option in the settings anymore and some of them are being told by Tesla service centers that it is not a bug.
Tesla is now delivering new cars with the regen strength being standard without the option to put it to ā€˜lowā€™.
The automaker is not taking away the option for vehicles who had it before even with the latest software updates.

It appears to only affect new vehicles delivered since around June 2020.
As usual, itā€™s hard to get official information from Tesla on the change since the automaker doesnā€™t have official press communications anymore.
Electrekā€™s Take
This is a strange move. The standard setting is definitely more efficient and most people should just try to get used to it.
However, the low setting was useful for first-time electric vehicle owners and some people also preferred the setting when driving in the snow or other bad conditions.
Living in Quebec, Iā€™ve driven Tesla vehicles in plenty of icy and snowy conditions and never felt the need to put regen braking in low, but I use good winter tires, which I think is the thing that makes the single greatest difference for safe winter driving.
But I do understand why someone would want less aggressive regen braking on a slippery road.
I donā€™t see why Tesla would not want to give drivers the option to use it as long as you understand its impact on efficiency.
What do you think? Let us know in the comment section below.
I think to get a little range boost Tesla needed to run EPA range tests in "standard" regen mode. EPA likely countered and said, "All your customers drive in low. Eliminate low if you want the higher range rating." Magically, low disappeared...
 

RonTCat

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Makes sense @RonTCat. Range is the name of the sales game atm so ...
Yep. Regulations make you choose a drive mode for testing, and while it never specifies which mode you choose, the intent and spirit of the law says it must be the most popular mode. Musk can taunt the SEC, but EPA don't play that game. They bring the hammer, and it hurts. Ask VW.
 

Kamuelaflyer

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Yep. Regulations make you choose a drive mode for testing, and while it never specifies which mode you choose, the intent and spirit of the law says it must be the most popular mode. Musk can taunt the SEC, but EPA don't play that game. They bring the hammer, and it hurts. Ask VW.
Governmental Agencies of all levels and sorts, particularly those with enforcement responsibilities, take a dim view of fraud and coverups. Go figure. As you said, ask VW. Or Boeing.

It's hard to make orange to clementine comparisons when someone is slipping in a mango. Uniformity in testing is sort of a good thing.
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