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- เผยแพร่เมื่อ 29 พ.ย. 2024
- Today we're looking at how regenerative brakes work. We'll also see how much energy it saves and how it impacts driving range.
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Disclaimer: All videos and content in this channel are for sole entertainment purposes, without any expressed or implied warranty or guarantee of any particular result. Jimi Moso assumes no liability for property damage, loss, or injury incurred as a result of any information contained in this video. Usage of any information from this video or channel is at the viewer's own risk, and any such negative consequence are the sole responsibility of the viewer. Jimi Moso isn’t a professional car advisor or driving instructor. The information in this video doesn’t constitute professional advice. Some representative footages or images have been used to convey the story visually or for illustrative purposes only and may be unrelated to the actual event. Licensed stock media are also included.
I love how you had used Cannondale Bad Habit,or maybe Scalpel mountain bike shape in animation,to explain kinetic energy. Great job!
Glad you liked it!
I didn’t know the cyber truck came with Sti brakes lol
Scotty sent me here. What’s going on
🤔
Scottyy 🤟🏼🤙🏽
Right
Lol Me too @scotty EVs? 😅
I wish this video was more specific and not just tell the same things in different ways. Like how does it capture energy, under which principle. What makes contact with the brakes exactly and what are the parts of it to avoid unwanted wear and tear.
thanks for the feedback. In the future videos
Honestly its complicated. And how you can store the energy differs. I'm surprised no one referenced formula one because this video kept reminding of their hybrid engines
Idk how you did it but you scored with the Scotty Kilmer affiliation. I watched the whole video. Good job. 👍🏼
For anyone wanting to understand the fundamentals
Motor
two parts the rotor and the stator, the stator is the stationary part of the motor. The stator is the part that's bundled up with copper wire/magnets and lies around the rotating shaft.
The rotor is the moving part of the motor, this rotor is the rotating shaft.
When a electric current is passed through the stator it makes the rotor move, this works because the electric current creates a magnetic field moving the rotor.
So this is how it works on a basic level.
When you rotate the rotor around the stator you can produce electricity, when you send electricity to the stator it will make the rotor move.
With clever engineering you can make this motor turn into a generator at will.
The animation in your videos is impeccable.
Spectacular elaboration about RBS...... ma'am.....I got lot of information form your video this kind of information I never saw in any one TH-cam videos...And my conclusion is, you are really really out of the box..... Thank you....keep progress....
It's my pleasure
You described the motor being used as a generator during braking--OK, got that, an electric motor is a generator in reverse. However, your graphics prominently shows some sort of device mounted at the wheel, opposite the brake caliper. This could be a magnetic pick-up using the disk to create a magnetic field and generate power but you say nothing about it. What is it?
Yep. the small red caliper is a bit missleading. A small second break on the discs can be seen on most cars but its never a regen break its simply the parking break. The parkingbreak is usualy controlled by a wire either connected to a handbreak or a servo pulling the wire for you if your car has a electric parkbreak (P) This is so that all cars has a second break system if the ordinary breaks fails. BTW even normal petrol cars without any hybrid systems usualy have regen breaks. In petrol or diesel cars the engine breaking can charges the regular car battery to save some of that kinetic energy, otherwise a automatic car rather go into free roll in order to go as far as possible with the energy thats aviable.
I’d imagine that, even though lighter vehicles don’t make as much energy from regenerative braking, that they also don’t use as much energy to move themselves and their weight since they’re much lighter, right? Cool vid
battery smaller as well.
Heavier and larger semi trucks can gain alot of use out of regenerative braking, in non ev semi trucks. Truckers use what's called engine breaking. Basically they switch to a lower gear that slows down the combustion cycle in the engine. Pretty complicated and only useful for manual transmission cars like most diesel semi trucks. Also increases the torque output which can crack weaker roads.
But when a semi EV uses regen breaking going down hill two things can happen, the vehicle can sap that gravity to use later when it goes back uphill entering a net zero. Second occasion is if the truck doesn't have to return to a higher elevation (it doesn't go back uphill) you end up charging your truck while you're driving.
Second benefit to this system is that the brakes don't get overheated, that's why engine braking is used with manual diesel engines. All of that inertia will be converted into heat and melt your classical friction brakes.
*Upon more research diesel trucks don't slow the combustion cycle they just suck all the energy out of the crankshaft/driveshaft and fart it out before it can be combusted. This cycle of pressurizing air and then farting it out consumes more energy than it produces (makes no energy because combustion doesn't occur) so the truck actually slows down.
Also, RB is generally less effective when the battery is cold or almost fully charged.
Here cause of Scott Kilmer ! Such a good channel that led me to this one!
Saw many videos on this topic. Didn't understand... when I saw your video understood to the fullest potential... Thank you so much for sharing this content...
You are most welcome
I wish my ebike had regen as I live in a hilly area, but my ebike batteries can only recharge at a Max of 3 amps so would need super capacitors for storage while it slowly charges my battery
3 amps dosnt sound bad for an ebike, whats the voltage and amps on tbe batt?
@@gabproductions3312 it's a 48v 20ah battery, but a few seconds of charging at 3 amps won't make any difference
@@Markcain268 yeah ur right
@@gabproductions3312 I'm sure the motor (1kw) can produce around 15 amps on regen so a bank of super capacitors could hold that charge and trickle charge the battery
@@Markcain268 im not sure, can a motor generate the same amount of power it consumes at the same rpm?
Probably the best video I’ve found on how it actually works.
Just two questions: how is the magnetic field created from the electric generator that is activated once you take your foot off the accelerator?
And how does this magnetic field actually slow down the axial which in turn slows down the car?
You should be able to get an answer by looking up counter electromotive force (CEMF) and counter torque. These are considered generator action in a motor and motor action in a generator, respectively.
The rotor of a generator has a magnetic field that is created either by a permanent magnet or an electromagnet powered through a method such as slip rings and brushes.
When the device is motoring, the stator windings are powered via AC or step DC voltage (simulated AC) to create a rotating magnetic field. The rotor's magnetic field will try to lock onto this rotating magnetic field which causes the rotor to spin. For a motor, CEMF is induced back into the stator windings and is an energy loss. This CEMF comes from the rotor's magnetic field passing across the stator windings as it spins and attempting to cause current flow in the opposite direction.
If you remove the AC power supply to the generator, the CEMF being generated is no longer CEMF as the device is no longer motoring. It is now considered a generator.
Have you heard when timing belts creak in cars? So their generator is faulty and due to too much resistance of the generator electromagnet, the belt that turns the generator slips in the rollers.
Electromagnetic induction, electricity can induce or create a magnetic field. Magnetic fields can also induce or create electricity.
Energy can neither be created nor destroyed only transformed. So if the magnetic field is creating electricity it stands to reason it's simply consuming the rotation of your wheels (attached to the motor's rotor) and storing it in the battery.
Concisely explained.
I always feel like this system is not efficient at all. Braking produces so much energy. Specialy going down hill. It doesn't only produce heat. A lot of energy is converted to wear as well. A system that could store almost all the energy from braking would be a system where we replace the whole traditional braking system for some kind of torque converter on the drive shaft(s) that directly transfers the energy from the speed reduction in to for example a flywheel or some kind of spring system. Or even more interesting: air pressure. The Chinese are working on that now. Store energy in form of air pressure. But I guess it would be to heavy and to complicated. But in theory braking should produce the same amount of energy as accelerating. Which would leave us only cruising which takes only a fraction of energy compared to accelerating and braking.
Energy might be the same but the work is extremely different. We accelerate say 0 to 60 in 6 secs but brakes from 60 to 0 in 2 secs.
@@shiroyt4185 Time doesn't matter. It's the roughly same amount of energy only released faster or slower. (Ignoring air and road resistance) If you could catch all that energy it would make a massive difference. ( from 60 to 0 in 2 seconds.. That would be an absolute emergency stop on dry road. Normally when driving relaxed it would be different 😉)
@@Neodymium5312 I know. To heavy for sure. And you would still need some form of extra brake system to be able to reduce speed very fast and come to a standstill. I have often had in my mind an extremely tough spring made out of some really strong material which will me loaded by the torque converter the harder you push the pedal the less the converter slips. The tension in the spring could than be released while accelerating. That could make for quite a strong brake. Just riffing here 😁
@@Neodymium5312 Yea we are only just getting started. It all used to be so easy even just 20 years ago. Ever brand had like 3-5 models and they were all basically very similar. I think there was a point in the late 90's where I could actually name every single car on the road. I knew them all. Now we are being overloaded by technology and new inventions. There are loads of car brands that I have never even heard of. I honestly have no idea what we will end up with in 100 years from now. 😵
ya but that would assume people know how to drive and dont tail gate but they do even though it cost them more gas by doing so
Beautifully explained, and the animations help so much. Also you give a whole new meaning to a "Talking Head video". 👍😁
I've searched for this video a like. Finally this gets recommended to me
!!!
What a high quality video, that should be way mire spread across TH-cam
I also really enjoyed your background music, would you post the link to it please :)
Thanks, will do!
I'm still not getting it.. On coasting or coming to a stop, the motors should become a generator(?). I'd like to picture a reduction gear that comes into play that spins up the electric motor from the tire/shaft on slowing. At 60mph a tire roughly spins at 1,100 to 1,400 rpms, even a 2:1 or 3:1 could get the motor to spin around 3000rpm generating a nice charge back to the battery.
Side question: with all this draining/recharging, does that put excessive strain on the batteries?
Regarding the first part I wouldn’t be able to explain, but regarding your last question, it does not put strain on the battery because the amount of electricity been generated by the brakes is very small compared to the high intensity power you would get out of a charger. It’s basically a very small charge at a time
The motors become generators and slow down the vehicle, evs have cvt's wich makes the gear ratio vary like downshifting on an auto or std vehicle slowly the car and spinning up the motor/gen faster.
@@gabproductions3312 EVs do NOT have a CVT, or any other kind of variable gear ratio transmission. The motor(s) are always coupled to the wheels through a fixed reduction gear. Most EVs are in the range of 9:1 from motor to wheel. There is no clutch, no torque converter, no neutral, no reverse gear. If the wheel is turning, the motor is turning 9 times faster. If the car is going backward, the motor is spinning backwards. The only EV in current production the actually does have a gear shift is the Porsche Taycan. It has a two speed dual clutch automatic.
Good video. Keep up the great work for Scotty Kilmer 👍
Thanks, will do!
Looking at the comments, guess turning engine into a break wouldn't work as well, maybe there's a reason for that. This video set up looks like a good start.
Lithium-Ionen batteries usually have a limited number of recharges. Is it a good idea to constantly recharge a small amount of energy. It would just significantly reduce the life time of your battery. Correct?
so its like a Crank radio. the energy allows it to spin the crank shaft and thus generating electricity
You're a cartoon girl, I don't think I should believe you. You could be an AI robot.
The Prius had this same braking system back in the early 2000s idk why we are still charging these vehicles in 2021
Someone hasn't hurd of the laws of thermodynamics
charging hybrid,really ;)?
@FacePwn64 that's right, man! You said it!
Just like cell phones, they drip technology to get more money; improvement here, improvement there but still with the old. Computer industry milked the world with this strategy, drip drip drip
Well that is verry basic physics. The loss of energy. The amonut of energy required to get the car up to speed is far more than the regen breaks can get back. this is due to a varaity of things like resistance and friction to mention two. What you suppose is a perpetual motion machine and that is physicly impossible.
Love the video
I came here because of Scotty
What is your software to made these great videos?
I mean I knew it charges the car. Was looking for more about how it actually works in a little more detail. How does it convert KE to electrical energy?
When you drive a motor it is a generator. When you put power to a generator it is motor.
I was expecting to see/understatnd as to how RB works, i.e the technical detail of changing/creating opposite direction of electricity flow.
Great Video!
This is the explanation i was searching for, great video ! Your animations are awesome, can you tell me where did you learn your animations ?
Looks like I now know I don't need my next electric bike to have regenerative braking now if I buy another one. This video and all your videos great
Good to hear!
Why are clutch discs used to represent brakes at 1:55?
Lmao I was wondering the same thing hahaha
I would imagine they are used to represent the electric motor clutches
I didn't even notice till you mentioned
Looks a LOL bit like a motor too.
I always thought .should gnrator connectivi pols this way is simple 👍👍👍👍
Sorry I forgot but now I’m subscribed!
Nice explanation and animations...
Thanks a lot 😊
Suprised this hasnt been set up on a drive shaft yrs ago pancake motor gen. Leave it on work like a jake or brake pedal only
This video still did not answer the question I had which is how do you slow down in a EV/HEV? If releasing the accelerator is essential to beginning of braking, then how exactly are you coasting? You still must press brakes in order to stop, no? What happens during cruise control? So many issues left unanswered by this video.
Why not use the rotating wheels to changer yr battery. Double motor
great and easy expllaination
Glad you think so!
So why not have an altenator dedicated to charging the battery alongside with an altenator that uses acceleration and mome tum to charge Longside with regen braking... That will cause some power loss according to physics but will provide power when coasting and going downhill.... I mean the goal is harvesting power from used power and free power..
How braking torque is created in Electrical vehicle
6:28 “Electromagnetic RBS - it’s the most commonly used RBS today.”
Given that the requirements of a regenerative braking system are to provide a means to provide a charge to the battery system, I would have thought that ALL RBS systems have an electromagnetic component…
Or are there other braking systems that can provide a regenerative function without using electromagnetism?
great one
so it's essentially just engine breaking with the added benefit of using the engine as a generator
Are you familiar with the MGUH energy recovery system? It's an incredible piece of technology IMO and could make for an interesting supplementary video.
Why is it when you ask for something like a year or make if anything they give you everything but what you ask for do they do it just to make you mad
I am suffering from the same malady. Amazon is the absolute worst, with Google a close second, in my opinion. I search for a part for my car and Amazon shows me printer cartridges, personal lubricants, absolutely anything -except- the damned part I looked for.
1/2 mass times velocity squared.
Scotty takes me here
They couldn't put Tesla on the caliper instead of sti
love how the use Subaru STI brake calipers on a Tesla Cybertruck (not sarcasm)
RBS Should use capacitor for this surge of power, transfer to chemical battery is not that efficient
ayo the sti cyber truck
Wow didn’t know the cybertruck came with STI brakes.
Thank you…:)
Subaru calipers on a cybertruck?
I have seen an ebike without any physical brakes and with 2 motors on the 2 wheels
I call them bluetooth brakes
Toyota been doing that since the 90s
Scotty sent me
I remember riding my bicycle so fast I hit a bump and brake at the same time I went flying
me: driving without abs
Cybertruck is good, I would just have to remove any wifi/4g/5g antenas, and software updates to eliminate the possibility of getting hacked.
Wth modern vehicles the last thing youd like to do is uninstall software updates, that's how issues are fixes and those aremt the issues a person could fix alone
@@gabproductions3312 That's the word vs reality.
I don't think TESLA will use sti branded brakes lol
Dynamic braking like a locomotive
This is not how the brakes work This is what breaks do I want to know how they work...
Anyone else here from scotty?
Why even have a break pedal? It’s just like the unbreakable windows.
I thought this was a Scotty Kilmer video.
Subaru Fan are we?
What a cute emoji!!!
Ah yes the Tesla Model STi
KERS
Regenerative in STI lol
To hell with electric vehicles. Gasoline and diesel fuel All the way.
🌏
Khellooo
That’s formula one technology boooo that’s old and Tesla copy wao
👍👍💯🇺🇲🇺🇲
First
I still do not know what are the mechanics of regenerative brakes .. Does the device on the rotors act to turn the electric motors switching them from motors to generators by rewiring the motors normal electrical state ? This really failed to explain the technology ..
next video
The regeneration is not connected to the rotors in any way. Nor is any rewiring or rearrangement of the motors required to achieve regeneration. All that is required is to alter the phasing and voltage of the inverters that power the motors.
Great Vid!