Supermagnet car brake demonstration

Really cool explanation of how to make a supermagnet braking system that never wears out.

Category:

Howto & Style

Tags:

• science
• physics
• magnet
• supermagnet
• lenz

[aidengrandfield]

unfortunately the tires of a car don't spin at a high enough RPM to generate sufficient resistance vie eddy currents. You might get away applying it to the crank shaft but then the braking system would rely on the gearbox and clutch not failing (not safe enough). nice idea, It has its applications, but not in the auto industry.

[SuperMagnetMan]

Of course you haven't considered gearing it so that you get a 5-1 ratio of rotational speed. The rotational speed issue is just an engineering factor in increasing total surface area of the brake with multiple braking platters.

[NguyenJamie]

the abs(anti-lock braking system) is not only use for releasing the brakes and apply the brakes its also used for braking while turning even on wet or snowy roads

while doin the the effect of the abs system but thats just my opinion

but doesnt magnets lose its magnetic force from heat?

[SuperMagnetMan]

This is exactly like ABS - it does not lock up the wheel - just slows it down. There are a wide range of neo magnets that handle various levels of heat up to 200C and of course SmCo after that is good for 300C.

[storhaug3]

Came here after reading about magnetic breaking in my college physics textbook. All that I have to say, is that the amount of technology given to us by science is absolutely astounding (Thank Faraday for our knowledge and understanding of this specific phenomenon). Companies such as those in the automobile industry just capitalize on this understanding. I just want to encourage people to embrace the scientific method, and rightly attribute it as driving force in technological innovation.

[VivekRajcoomar]

you just wait, it will be done. even if the US car-makers dont do it, the japs will. and then u will wonder why r ppl not buying american.

[FZJ70]

@juno825 auto companies don't use this kind of mechanisms due to they make toooooooons of money selling spare parts (more than selling the cars themselves).

think about the Hydrogen and water engines, haven't been invented? of course they are! but it makes no profit to set apart the internal combustion engine factories!, think about the internal components of an engine that can be replaced over time... pistons, rings, bearings, belts, chains, and the block ifself!

cheers!

[banjax66]

How would you do an emergency stop?

What would happen if those breaks magnets picked up any iron filings

along the road or on that roller coaster?

[pianosidechat]

I did this for my 7th grade science project haha. I was trying to make a perpetual motion machine and turned out to work as great brakes

[Karaokephile]

@Agent739 The market "killed" the electric car. Nobody wants a piece of plastic that can only go 60 miles (90 +-, when brand new) then has to charge overnight. The government waived many safety requirements to push the EV1 into trial use. Battery technology's improved since the 90s and a viable electric car (Tesla) can be had for a mere $101k. If EVs could be built at a reasonable price, China or another non-oil-producing country would make them. No conspiracy, it's just not currently possible.

[Karaokephile]

From what I understand the eddy current brake can only slow something, so a secondary system must be used to stop. Putting two non-standard braking systems on a car is probably prohibitively expensive, which is why only very expensive vehicles (e.g. trains, trucks, high-end hybrids) have them. The old tech used on current brakes is probably dirt cheap to manufacture and replacement parts are the consumer's problem. The argument against hybrids is the same: You'll never save enough to pay for it.

[SuperMagnetMan]

@Xamaboy1994 - as far as I know the method that has been used for a few years is electro magnets not permanent magnets.

[SuperMagnetMan]

@juno825

Well,you are half right. The brake system I proposed is NOT 100% magnets to copper or aluminum. Upon becoming fully engaged it was magnet to magnet, which would certainly hold the car stopped and stop a slow moving car, but the smoothness and efficiency of braking from higher rotational speed using copper against magnet makes it the best way to slow the car and then fully engagement would be a row of magnets on the inner circle that has the size and power to stop it.

[Feilskapt]

you are a true genius. Or atleast you've got alot of knowledge!

[UBERKron]

@SuperMagnetMan im not surprised, theirs is regenerative, thus parts to wear and need servicing

[fotoma7]

woooooooow

boring