20:57 "That's not really a guess, that's just an engineering assumption." 😂

@andrewt9204

Ай бұрын

That's a great weasel word, I'll have to use that someday.

@revengefrommars

Ай бұрын

So, an educated guess?

@genephipps6421

Ай бұрын

The term Sandy was grasping for is "Preliminary hypothesis".

@alanmay7929

Ай бұрын

@@revengefrommars its still a guess because they literaly have no idea lol...

@UnlikelyToRemember

Ай бұрын

we call them SWAG's ("Scientific Wild Ass Guess")

It's good to hear Ben's voice in your video. I thought he was a good presenter and a real value to Munro Live.

@MunroLive

Ай бұрын

We agree!

@ntulsian

Ай бұрын

I like all the episodes, but a bit more in which Ben is presenting, good job, Ben 👍🏼🫡

@Hugo-py2ce

Ай бұрын

​@@ntulsianYes!

@billybobbob3003

Ай бұрын

@@MunroLive this outdated technology requires oil changes and liquid cooling just like combustion engines and its not 845 hp its 3 motors slapped together to equal 845 hp there are chevy small bocks pushing 900 hp naturally aspirated lol just ''one engine alone'' lol you call this superior tech? get real kids.

@billybobbob3003

Ай бұрын

@@MunroLive look up louisville family celebrates 1 million miles it's a 2007 honda crv 3rd generation crv with honda k24/2.4 liter 4 cylinder with over 1 million miles lol so munros full of crap in this video.

On the monoblock vs segmented magnets, I would recommend using magnaview film to see if the magnet is segmented inside of the external plating. The other thing to check is the electrical conductivity of the magnet to see if they added anything to the magnet that would reduce the electrical conductivity before sintering it. Both methods could be used to reduce eddy currents.

@NyashaM

Ай бұрын

nah tesla wants to cost cut no matter what. Only the high margins matter now

@streddaz

Ай бұрын

@@NyashaMPatrick is referring to the testing methods to inspect the motor, nothing to do with Tesla making savings.

@satoshimanabe2493

26 күн бұрын

As I understand it, rare-earth magnets use sintered material (not poured into a mold in a liquid state). So perhaps a nonconductive binder (instead of sintering) is possible, in which case there would be no eddy losses on any axis. (The counterpoint is that such a structure would not benefit from being plated...so this may not be the case.)

@patrickmorse7549

25 күн бұрын

@@satoshimanabe2493 the plating is typically alternating layers of nickel an copper and while I agree that eddy currents may be generated in the plating it is very difficult to build up eddy currents into very thin conductive sheets. I have spent a lot of time using induction power to evaporate metal in a vacuum chamber and bulk blocks are much easier to get thermal power into than thin conductive sheets. This is also why laminations are used. Lastly the plating would still be essential as Neodynimum based magnets are highly succeptialbe to moisture based corrosion.

@satoshimanabe2493

25 күн бұрын

@@patrickmorse7549 Thanks for the explanation about plating, very helpful. What I meant by non-sintered, seems it's actually called bonded magnets (I'm sure you're familiar). I was trying to say that if the bonding fully coats each particle so they are electrically isolated, would there be any need for additional segmentation?

Appreciate you included more of the teardown

I just love these Monro cybertruck reveal videos. I'm embarrassed to say they remind me of an old time burlesque show. Where each week the Cybertruck takes off a little bit more. Thank you for not playing bump and grind music.

Cooling the magnets makes sense, because overheating a magnet can reduce it's strength permanently.

The disassembly intro adds context and perspective. If you were to add them to most of your videos we all would get a lot more out of them... THANKS!!!

My Honda Civic at 460,000 miles says otherwise. I got that out of a piston car. It's more than doable if you regularly maintain.

@richardwolf6269

Ай бұрын

Don’t confuse the cult with facts. Elon could take a dump on a sidewalk and they would be clamoring to put it on their mantle! 🙄

@whambodius

26 күн бұрын

03 E220CDI , had over 1M Km and a original turbo on it's way out when my family got rid of it . Grandpa passed it down to my aunt and she traded it in for a 2016 BMW 3 series Gran Coupe. Car had literally 0 issues other than the loud turbo .

@SpencerHHO

18 күн бұрын

Even if they don't rebuilding or replacing an engine is still cheaper than a new battery half the time and it's not clear how many new batteries these cars would need to do that kind of mileage.

@alexwalker8422

12 күн бұрын

Civic reliability is absolutely phenomenal, the on of the few things beyond a civic is an early 2000s diesel Volkswagen Jetta, a million miles is common with those things. What year of civic do you have? I recall that the most (in fact the only) I could find of the Honda civics that were able to reach a million miles were all 2006.

@1950sAmericanFather

12 күн бұрын

She's an 07 civic. Has all the paint issues, but mechanically absolutely sound.

Great video, thank you so much for putting this for free! Some thoughts on the non segmented magnets: First of all, yes there are eddy current losses in the magnets but they are quite small compared to iron and copper losses. Still they can be problematic since they are the heat source in a temperature sensitive part. One problem with the segmentation is that you will lose some torque because of having less magnet material in the rotor. This will make the motor a bit less efficient. I think that this loss of efficiency could be more than the additional eddy current losses. However, these eddy current losses are mainly due to the current harmonics caused by the PWM. This means that you can drastically influence the magnet losses by the PWM. Maybe Tesla optimized their PWM in order to reduce the magnet losses for not having to segment the magnets.

@markplott4820

Ай бұрын

Dont worry MUNRO will SELL the Cybertruck report for $1 MILLION Dollars.

@ignaciohavok1

Ай бұрын

It has nothing to do with what you are saying. It’s because this pm motor will never reach deep into the flux weakening region. If you are interested I can explain why I know.

@FormalElements

Ай бұрын

I am ​@@ignaciohavok1

@JohnChuprun

Ай бұрын

@@ignaciohavok1 I am interested, please explain!

@DBlackRihno

Ай бұрын

​@@ignaciohavok1sounds interesting, could you explain? Does it mean the motor is not driven to high speeds or is the corner speed quite high?

That bearing rotation constraint is most excellent !!

@heartysteer8752

Ай бұрын

Absolutely! Huge improvement for reliability/life cost. Some bearings have had pins/nubs on the outer race to prevent spinning and I've never understood why more of them don't.

@hybridinnovate

29 күн бұрын

После разборки, совместить три подшипника будет не возможно, это сделано чтобы вы не смогли сделать ремонт

@MooseOnEarth

27 күн бұрын

It adds parts: the bearing rotation locking mechanism and the spring. Does not align with a "the best part is no part" philosophy. Should by constantly checked for better alternatives.

@MooseOnEarth

27 күн бұрын

@@hybridinnovate Munro disassembled these very drive units including getting those bearings out. Why do you think this hinders repair of the units? Do you think, they broke the spring mechanism?

@hybridinnovate

25 күн бұрын

@@MooseOnEarth это не мешает ремонту, позиционировать одновременно 3 подшипника для сборки будет не просто

"It's not a guess. It's an engineering assumption." Best Sandy quote ever!

@jim9930

21 күн бұрын

Ask the man whether he would trust a Cybertruck pulling a travel trailer up into mountains with the wife and kids... or a 73 Ford LTD wagon/trailer towing package 🙃

Dear Mr. Munro and Team, I wanted to extend my heartfelt appreciation for the incredible work you all have done in meticulously disassembling and analyzing the state-of-the-art machines. Tesla’s attention to details and dedication to refining their design and technology are truly remarkable. I was particularly fascinated by the hair-pin windings which I saw in some recent cars alternators. To me, they are a piece of art. No wonder why tesla is the ev-leaders, the mindfulness and understanding displayed by Tesla engineers in perfecting even the smallest details is truly commendable. Thanks

@fib4923

Ай бұрын

STFU. TESLA IS GARBAGE

@JohnChuprun

Ай бұрын

Hairpin motors have been around since at least the mid 1950s. Yes it looks very neat but is nothing new :)

@edwardfletcher7790

Ай бұрын

Elon isn't going to read this or take it into account at your next HR assessment mate... LoL 🤣

@kenfry2664

29 күн бұрын

@@edwardfletcher7790 Yes! These teardowns are pure Tesla PR. The engineering is OK, but strikingly ordinary. A naive audience would be impressed by a mid 1950's automatic transmission, an ordinary ICE, a Timex mechanical watch... shiny stuff. Nothing in the Tesla is fundamentally different or better than all the cool stuff in any of the other electric cars, And most of those others have not had anywhere near as many troubling safety-related recalls: steering wheels that fall off, steering racks that are not mounted correctly, Cybertruck accelerators that jam, etc.

@edwardfletcher7790

29 күн бұрын

@@kenfry2664 I'm glad someone else noticed the problems I did. The whole under carriage is a cleaning and rust prevention nightmare !!

that spring loaded pin to catch and stop outer race from spinning is so smart of an idea.. and Sandy's response "so anyways..." lol

@neilfromclearwaterfl81

Ай бұрын

It's an interesting solution but... The tiny pin may prevent a small problem from quickly becoming a bigger one however at the power and torque levels involved once that bearing gets grabby its going to spin unless the operator notices the change in sound when it starts to fail and has it serviced expeditiously. Time will tell whether having that pin tear loose causes more damage than it prevents. Hopefully the MTBF of those bearings exceeds the half to one million mile operational life expectation of the vehicle. I can see that spring loaded pin failing and causing damage similar to other implementations using spring located pins that we've had for some time in pneumatic and hydraulic tools. If the damage isn't too catastrophic sometimes I've been able to just clean up the seating area and drill a new hole for the locating pin and spring while other times its weld and machine a new surface or replace that part of the housing depending on the cost of the part and the value of the unit or perhaps the cost of the downtime. Like Sandy said:. so anyways... ;> Best!

I am no electrical engineer but Tesla uses segmented magnets in their other motors. There must be a valid reason why they changed. I remember a few years ago Sandy was surprised at segmented magnets used in the model 3 motor

@patreekotime4578

Ай бұрын

If loss of efficiency is the downside, it is possible that torque is the upside?

@EwanM11

Ай бұрын

I think its very likely that the inefficiency is only noticeable at high power loads, which it too infrequent to have an impact on range. The motor will have at least 300hp and will probably be using less than 60 at cruising speed.

@markplott4820

Ай бұрын

Trucks need MORE Torque than Speed . more Efficiency over Acceleration. more RANGE when Towing.

@davidanalyst671

Ай бұрын

my best guess is that elon has 4 years backlog on the cybertruck. Now take that to its conclusion.........

@jamesaspinwall

Ай бұрын

@@davidanalyst671 No idea what you mean. What does the magnet has to do with the backlog?

Would love to see more of those big honking gears, that's some pretty wicked stuff. Machined, smooth, shiny metal - practical and beautiful all at once.

Love the bearing retention detail! Huge improvement for reliability/life cost. Some bearings have had pins/nubs on the outer race to prevent spinning and I've never understood why more of them don't.

All motors can be "turned off" in motion; the difference between induction and PM is the magnetic drag while unpowered, as more clearly explained in another Munro video by Paul.

This kind of videos really benefits from Sandy outlining the wider meaning and historic place of all the technical details. As a software engineer I otherwise wouldn’t quite catch the showcased engineering genius 🙏🏻

@markplott4820

Ай бұрын

Software & Hardware need to work alongside on the Floor , to better understand one another.

@arthurmoore9488

29 күн бұрын

@@markplott4820 Isn't that the truth. Especially when it comes to embedded design, it's easy to say "X" will work, then realize it doesn't in practice. Flashbacks to RS-232 vs RS-485 pain in the rear. Especially when the company is trying to be cheap.

_Extraordinary Engineering_ That was an engaging teardown boys! Can't wait for the next one....

Only by Munro... thx folks for the teardown and comments, this info is priceless both for existing and future EV owners. Keep on building great name!

this is just an amazing 20 minutes piece of knowledge. THANKS

I think the magnets issue is so that tesla intentionally makes the motor hotter so that it can use that heat to keep the battery warm in colder weather. It is really the only motor that is running most of the time and especially on the highway. So, there is a lot of heat loss in colder climates. Basically, they don't have to add a heater, but then they can modulate the cooling for hotter climates, or even shift the work to the induction motors. I am just guessing, but I'm usually right.

Kudos to Munro and associates - all your presenters are very experienced and do outstanding presentations. Excellent information and excellent naught.

Ben's explanations have been awesome! Thanks to both! 👏👏😍😍

thanks Munro team!

AMAZING! THANKS FOR VIDEO!

I love this truck even MORE now that I see the innards

@davidanalyst671

Ай бұрын

I am DYING to see the electrical system. DYING!!!

@Bimmer_Bill

Ай бұрын

Do you love it when they use soap to lubricate the accelerator pedal and have to recall every last truck due to suds left over? Lmao junk

@toxic.lobster

Ай бұрын

@wethomas3 I love to see someone take a risk, innovate, move our perception into new direction. Ford made a lot of mistakes that cost the lives of many people before they dialed in their trucks. The issues you mention are minor. If you think you can do better, have at'er, I doubt you could compete.

@Bimmer_Bill

Ай бұрын

@@toxic.lobster wait, you’re telling me that a stuck accelerator pedal (the reason for the recall) is “minor”? Fwiw I’m not a fan of Ford either buddy. But let’s be honest, Tesla while they innovate in areas they are shoddy compared to the rest of the industry in many others. iPads on the dash and faulty misnamed “FSD” systems aren’t impressive. Keep it 💯

Great info. Thank you to the whole team.

@MunroLive

Ай бұрын

Our pleasure!

thank you sandy n team

Induction and PM synchronous motors sharing stator design is good, but not new - Tesla has done that since their first PM motor, in the Model 3. Like the Model 3, the axial lengths are different, to suit different flux density and power requirements. Long before Tesla, Remy (now BorgWarner) offered their HVH series (which is also bar-wound with hairpins) with a choice of induction or PM rotors using exactly the same stator. It's good to see Tesla continuing this practice, and finally catching up to use bar winding.

Really thanks sir ,god bless you and your family

The segmented magnets make great sense if the truck is only operating in hot climates. But Tesla uses motor inefficiencies to generate heat to put into the heat pump that keeps the battery and cab warm. It may well be that when they run the calculations, the extra heat is required more often and the solid batteries allow this to be generated faster and at less electrical cost. Rapid warm up and keeping the battery warm is very important. Not to mention creature comfort.

"You'll never get that (half a million miles) engine life from an ice car." I'm real damn sure a couple of ICE cars have passed a million miles, not just half a million.

@thanksno4911

Ай бұрын

Guy math: Spending $30,000 and countless hours to keep a $3,000 vehicle running. 😁

@mikemccarthy1638

Ай бұрын

Stalin math: “Spending $60k ($30k + your labor) to get that lone $3k car to 1 M miles is a tragedy. Getting 1 M Teslas to 1 M miles is a statistic.”

@richardwolf6269

Ай бұрын

Better than spending a 100 grand on the Cybertruck monstrosity! I have almost 300,000 miles on my 4 cylinder Toyota 4 runner with the original engine and tranny and still runs great. New radiator, driveshaft with new u joints, tires, brakes, oil changes and that’s it! Parts are cheap. Let’s see a Tesla after 300,000 miles. If the battery goes tits up then take out a loan! I’m not anti EV but they have their place, we have a 2020 Chevy bolt which sees the majority of our miles now but it won’t replace our motorhome for travel or Chevy pickup for hauling.

@whattheschmidt

Ай бұрын

@@richardwolf6269 There are plenty of Tesla's over 300K. Half a million is much tougher to hit, almost no on drives enough to do that on a vehicle before it way ages out. The avg yearly mileage for someone in the US is around 13.5K. That would be 37 years for the average person.

@pilotavery

29 күн бұрын

Yeah there are a couple that have but that is the exception and not the norm. Less than 0.2% of vehicles on the road get to 500000

15:00 Land Cruiser 70 series : "Hold my beer Sandy" 😂😂😂 (just one example that they can)

Great craftsmanship.

Awesome wideo! Thanks for sharing knowledge! Greetings from Poland!

Awesome!!! Thank you so much!!

The motor is a work of art

@user-bq3fw4ps2e

11 күн бұрын

))) у вас плохой вкус. Это произведение маркетологов.

Could it be that the magnet is segmented internally, inside the outer plating, or made of a less electrically conductive material to reduce eddy curent losses?

@celeron55

Ай бұрын

How much eddy current loss there is in a magnet though? Doesn't the stator aim to keep the magnetic field quite constant relative to the magnets, and a constant field definitely doesn't produce eddy currents!

@davidanalyst671

Ай бұрын

you don't put an outer metal plating on a series of magnets. Thats magnets 101 man. Any metal solidly connected to the magnets would distort the mag field. You could segment the magnets, wrap in saran wrap, and then dip in liquid steel, like they dip snickers bars in chocolate, but that would increase the distance from magnetic material to the lectric coils it reacts with.... so you wouldn't do that.

@briannease4117

Ай бұрын

@mikeselectricstuff , Wow, you would be a great addition to the Monroe reverse engineering team. I can hear your whispering voice now discussing the finer details as the components are carefully disassembled. I have been waiting for the day you disassemble an MRI superconducting magnet on your channel.

@kazedcat

Ай бұрын

I assume they did something to the metallurgy of the permanent magnet. That would be a low hanging fruit. Tweak the silicon content or add some exotic element and bam eddy current is reduced significantly.

I'm glad we have you two as Americans. I hope you have contacts at the DOD -- they need some more folks like yall in their rolodex.

@davidanalyst671

Ай бұрын

a cyberbeast costs 100k. a f35 costs $30,000,000. He has contacts, but it sure would be fun to see sandy do a teardown on A JLTV. I would 100% watch that.

@CiaranMcHale

Ай бұрын

I vaguely recall that in some previous videos Sandy mentioned he had worked on some military projects.

At Investor Day in March 2023, Tesla announced that it planned to move away from rare earth metals in future motor designs. It would be interesting to hear if Tesla has managed to do this in the Cybertruck's motors.

I, to the segmented magnets!

12:00 The first time I saw Sandy was before the Pandemic, on Autoline After Hours. . . Showing John McElroy Tesla’s “Secret Sauce”, pulling a segmented magnet out of his tweed jacket.

I'm loving these

Thanks! Wondering if the dual motor will have a similar set-up only reversing the PM with the induction motor. Also wondering if having the induction motor up front turned off at highway speeds would help with noise vs having the PM running all the time.

@kazedcat

Ай бұрын

The induction motor is noisier you have coil whine on the stator and the rotor while PM motors only have coils on the stator.

@vegajf51

Ай бұрын

I believe I saw somewhere mention that on the 2 motor the induction is in the front and PM in the back.

yes! the motor break down.

Thank you for educating us, great content!

Heat can reduce or destroy magnetism. So cooling them may also increase magnet life/power.

The thick aluminum end plates on the PM rotor, if it is closer to the stator will have higher eddy currents that is not good for efficiency. If cooling is the reason why not have some holes on those end plates.?

@AntonioDiNunnoEVS

Ай бұрын

air permittivity vs aluminum permittivity, good observation

@sparksmcgee6641

3 күн бұрын

Ok I know aluminum thermal conductivity but what is the comparison with air in this situation? I'm construction and thermal bridging of aluminum is tragic.😊

Thanks I’ve been waiting for this.

Great video and I hope your hands getting better love the work you’ve been doing in that area too

Paul was really a great communicator in this video.

I really enjoy this content. Nice job!

@MunroLive

Ай бұрын

Glad you enjoy it!

Sandy is the man.

I love induction motors! Such a indestructible design, soo easy to drive without all the position-sensing hall sensor junk. Makes me happy that they still use them even in modern electric cars

@kenfry2664

29 күн бұрын

I agree.

Hi informative video thank you.. from India

Terrific overview.

i assume at this point in the tesla story...if there's a design change or something that is "inexplicable" then it is for a damn good reason.

@grahammonk8013

Ай бұрын

@rwhirsch Yes, but I think the reasons might not be instantly obvious. Is it simply cost savings? And is that simply to make the cars more affordable? Or cheaper to run? Or durability? Or better performance? And is that more power or greater efficiency? Tesla has greater integration in their engineering teams than anyone else, and I will bet there are many conversations that go, "Hey! I gained X% more something!" to which another engineer says, "Did you consider XYZ?" ...."Oh shit! Back to the drawing board" From which they end up with a third option that solves both problems. This is why I don't think many manufacturers are going to catch up all that quickly. Would love to see how the latest Mach-E compares to the first version. In particular the thermal management was a dog's breakfast. Even Ford admitted they missed an awful lot of details on the Mach-E generally.

The supplier videos are excellent, the 3 D Services Group look to be extremely impressive.

14:50 Munro, are we sure there are significant eddy currents in a Permanent Magnet Synchronous Motor? The whole point of the word Synchronous is that the magnetic pole from the stator is rotating in phase with the rotor’s permanent magnetic field poles. If there is significant pole slipping (relative movement between stator and rotor) then I think there is a problem in design or control systems. Relative movement between the field and conductor is required for an eddy current.

@kazedcat

Ай бұрын

We know heating is a problem that is why they opened up the end plate to get oil in. So there must be significant heating losses happening in the rotor near the magnets. Otherwise it would be much easier to fabricate the rotor all sealed up.

@imconsequetau5275

29 күн бұрын

The magnetic field is still passed from pole to pole in the stator. Even when three or so poles overlap per winding, there is some field fluctuation passing through the rotor. So it's like amplitude modulation.

Is the solid magnet for the motor the reason there is a pulsing vibration at some speeds? This is reminiscent of older automatic transmission when you are traveling at a speed that is kind of between two gears.

Be interesting putting two of these motors in one vehicle 😀

I learn a lot from Munro, Tesla and others; Thanks! - With the Cybertruck I see a certain amount of over-engineering and a vehicle that no longer helps many people in their daily lives, and there is no blessing from Above. - On the other hand, useful vehicles for many people, in many regions and many terrains in the world, small and affordable, robust and simple, economical "Model 2" are needed! Small cars for 3, 4 or 5 people, with a length of 2.8m to 3.5m (!), that is my area of work and is on the rise. Because there are already enough big, expensive “dinosaur cars” that will die out, but the little clever things give the world hope.

@kenfry2664

29 күн бұрын

YES!

@sparksmcgee6641

3 күн бұрын

These motor are also si.ilar to what will be going into the Semi. Electric food transport is more important than cheap car with the production available. Keep in mind typical US car makers take as long as tesla has been selling cars to develope a new model.

Thanks!

@MunroLive

Ай бұрын

Thank you!

Could the rear motor be split and used as 2 motors in a different application or do they need to be interlinked (using a different controller)

Excellent video.

@MunroLive

Ай бұрын

Thank you very much!

thank you for having sandy and other presenters in this one. sandy makes the material watchable.

Cheers.

Regarding the mechanical rear diff locking, why would that be needed when you have two servo-controlled motors with positional feedback? Surely they can simply command that they follow the same motion profile to come close to emulating a locked diff? The induction motors might not be quite as smooth as PM at low speed but I wonder why that wasn't done as it's a far cheaper solution, even if shaft resolvers of a higher resolution were needed? The bearing outer-race locking feature addresses a problem when over-sized ball-bearings are specified to handle helical-gear thrust loading, including cases where a tapered-roller pair would normally be used. It avoids the finicky preload setup on assembly but introduces a new problem because the minimum radial loading required to avoid outer-race spin in a slip-fit assembly situation is not achieved. This is a clever solution from Tesla as the spring pin even avoids needing to index the bearing during assembly. Thanks for the video, Munro team, alway interesting!

@imconsequetau5275

29 күн бұрын

The reason is that when a wheel lifts off and traction is lost, a locked differential allows *_both_* electric motors to apply torque to the single tire.

@redwood6737

29 күн бұрын

It seem to me that locker mechanics was in the front permanent magnet motor section. I could be wrong.

@boredKiwi

29 күн бұрын

@@redwood6737 good catch! I watched it again and you're correct that this was the front drive unit. They didn't show us the insides of the rear diff unit unfortunately.

@redwood6737

29 күн бұрын

@@boredKiwi thank you sir

@redwood6737

28 күн бұрын

@@boredKiwi thank you sir, I also got out the magnifying glass and when Sandy entered the picture they showed a spec sheet and on that sheet they’re showing 10,296 foot pound torque. The regular cyber truck there are actually showing 7435 Torque, not sure where they got those specs from but looks like they’re off by quite a bit. Not sure who did the misprint but I can’t imagine this Tesla putting out more than 1000 pounds of torque like my ram truck diesel Dooley Cummins.

how does the grooves on the lamination of induction motor rotor cage eliminate torque ripple? and how is it better than skewed rotor?

@kazedcat

Ай бұрын

It's not better just cheaper to fabricate. The grooves splits the magnetic fields.

@SashaDovbnia

11 күн бұрын

I was taught that offset fins make the mechanical characteristics of the engine more "smooth"

Looks Like A Beefy Package Cold Rolled Shaft Nice , Heff Duty Bearings , Magnetic in and out Straight Forward Tough Design ! None Segmented Magnets Don't Fry as Easily in Open Bath under Load !. Nice Looking Inverter !.

Interesting that Tesla cheaped out on the motor magnets while also giving Cybertruck a smaller battery than other e-trucks. I think they're sandbagging on early Cybertrucks, not thinking Chevy would beat them on range by loading up a bigger battery pack. Perhaps sometime in or after 2025, Cybertruck will get a "refresh" with a bigger, better battery pack, and a few other tweaks to get real-world range over 350 miles without an extra battery.

There is no loss due to eddy currents on the rotor of a permanent magnet motor. The rotor in a permanent magnet motor always sees a constant magnetic field even while the motor is turning.

@nerd1000ify

7 күн бұрын

This would be true in an ideal case. In practice however the phase current is controlled by PWM, so the rotor sees a field that is fluctuating at the PWM carrier frequency.

@franciscoshi1968

6 күн бұрын

@@nerd1000ify the rotor sees a constant magnetic field all the time. The current ripple at the carrier frequency is very small. The inductance of the motor filters out the carrier frequency.

@nerd1000ify

6 күн бұрын

@franciscoshi1968 the ripple is large enough to be audible as a whining sound in many motors, so it is certainly there. Might only be a small factor for efficiency of course.

cost cutting @11:00

Is installing two electric motors a better solution than one motor with an adaptive/adjustable differential?

So to be clear on the front differential- it's not limited slip, it's an electronic locker- giving a true Detroit locker type of performance?

@imconsequetau5275

29 күн бұрын

This locker allows both electric motors to send combined torque to the wheel that grips. Only really needed if a single motor has insufficient torque, which is a weakness in the PM reluctance rotor design.

Great shaft

More than just the non-segmented magnets, having that rotor end plate run to the rotor OD would generate unnecessary eddy current losses since they would be exposed to some of the magnetic flux from the stator field. In terms of the magnets, I'd be surprised if Tesla weren't on top of the gains segmented magnets can offer and I'd suspect they were not that significant, especially since the magnetic flux at part load operation is pretty modest compared with full torque so the losses would be not huge for most of the time.

@davidbeppler3032

Ай бұрын

Now apply those thoughts to 750,000 miles on said vehicle. What are the long term results? 1,250,000 miles? Keep in mind, the average Tesla produced after 2019 is expected to last 750k miles.

@JRP3

Ай бұрын

@@davidbeppler3032 I doubt Tesla is concerned with the cumulative efficiency losses above maybe 200K miles if they can save money up front in manufacturing costs.

@EwanM11

Ай бұрын

​@@davidbeppler3032the efficiency losses are probably only noticeable at higher power. For a vehicle that can do 0-60 in less than 3 seconds, it will spend very very little time at anywhere near full power.

@AndyRRR0791

Ай бұрын

@@davidbeppler3032 The efficiency won't change with time. It's all about selecting a cost-optimum design. If you spend 30 bucks more on segmented magnets but you can't see any range improvement and you can still handle the high power thermal control of the rotor, what's the point in spending the money?

So does the dual motor configuration have two of the fronts that are in the cyber beast? Do we know that yet?

@ReinReads

Ай бұрын

The rear motor on the dual motor model is a single configuration of the induction rear motors used here.

Doesn't the aluminium shrink after being cast in the rotor? I imagine you'll have some gaps and resistances. Maybe also adding noise?

Another top episode :)

Nice!

This channel is so cool, just found it. Seems like a great company, would love to work there!

little drill marks on the induction motor casting to maybe balance it like balancing a tire?

@tesla_tap

Ай бұрын

Yep. You'll see it on most (all?) motors.

You may want to break open the nickel plating on those magnets in the cyber truck motor. Double check that they are rare earths because they may not be.

Amazing the amount of power those little components on the inverter board’s control. The whole truck is awesome.

@christopherleubner6633

8 күн бұрын

Yup mosfets can switch pretty insane current for their size. A chip the size of a fingernail can switch hundreds of amps❤

Super!

Cool

Power is in Watt, why still use these archaic HP ? And which one ? The one = 746W ? Same for torque, Nm etc...

@lyfandeth

Ай бұрын

Because this America, and hp is the standard used by the general public to compare motor power. We use SAE wire guages in cars, and AWG guages for everything else. Those are standards in use. Engineers use the ISO standard for geographic position of only degrees, to five decimal places. And that's fine, but no navigators or cartographers use it. They use two different standards of degrees, minutes, and either decimal minutes, or seconds. Try to change standards. By all means.

@jpcaretta8847

Ай бұрын

​@@lyfandethgreat for proving me right, you seem so confused ! 😮 Imagine this Tesla designed and built according to SAE NON METRIC standards (pre seventies) 😅 Thanks Ford who made the inch exactly 25.4 mm ! Imagine the mess if it was still based on the survey units ? As for the US general public , sad to compare its education level to the rest of the civilised world. I have a foot both sides of the pond.

@sparksmcgee6641

3 күн бұрын

Are you going to complain when they start using Electric HP or do you know if they are?

I have wondered for a while, do you do any measurements on the gears? I have missed this being mentioned in the past. As a gear guy this interests me, I am so tempted to disassembly my tesla gear boxes to measure the gears.

@user-bq3fw4ps2e

11 күн бұрын

Они достаточно массивные )))

04:18 Isn't it 10 bars per slot in the hairpin of the PM motor of CyberTruck? From what I can see on the video, there are 5 rows of end windings there.

Amazing what EV’s have done with just first generations. Just think a few more generations. Battery tech is also rapidly changing

@tesla_tap

Ай бұрын

I think Tesla is more like the 4th generation major design. BMW appears to be on the 2nd generation. Most others are on the first generation although able to get a few ideas from Tesla if they are smart. Cool to see everyone making design improvements.

@ReinReads

Ай бұрын

Some of the Chinese are on the 2nd and 3 generations as sell.

@MatthewDeveloper

23 күн бұрын

Charging infrastructure that's not based on coal or diesel is also growing, we're not there yet, but it sure is coming.

@tesla_tap

20 күн бұрын

@@MatthewDeveloper - It depends where you are and the charging network. Tesla superchargers are 100% renewable power from a combination of onsite resources and annual renewable matching. Those EV owners with home solar may also be 100% renewable today.

Great content, bring back the younger engineers please.

@MunroLive

Ай бұрын

We feature many engineers on our channel.

Always appreciate your time and analysis

Two questions. 1. Why front one is permanent magnet motor and rear ones are induction motors 2. Is induction motors are not difficult for speed control? How they are achieving synchronization between all these 3 motos? Amazing Engineering...

@imconsequetau5275

29 күн бұрын

Induction motors are used only during high torque moments, and that typically is during hard acceleration. This load is desirable to place on the rear wheels. Each motor stator has its own dedicated variable frequency drive electronics and computer circuit board. They all are coordinated by the main computer.

@thisisnonpractice

28 күн бұрын

@@imconsequetau5275 thanks! Great piece of Engineering?!

At 16:18 won’t that dent in the outside of bearing be susceptible to quicker wearing ?

I wonder if the rear door hinges can be moved to the front doors

This *has* to be watched at 1.5 playback speed. The anticipation was killing me.

Wow Just incredible engineering, tesla sets the standard.

The motor looks like it’s 16 to 18 inches high. The lower you can position the bed without sacrificing clearance under the truck the better. Every inch you can reduce the height of the bed the better the truck. At some point we started to get used to low floor buses. If we want the Cybertruck to represent the future, we might look at having a low bed. How low can it go? Can there be a version of the Cybertruck with a bed that’s maybe 12 to 14 inches above the ground? If so, how does that affect the position of the electric motors? The simplest way to deal with this is have it front wheel drive. It would likely also not have rear seats.