Inductors and electromagnets are not the same thing. These are NOT magnetic cooktops, they are induction cooktops. An electromagnet works with requires an iron core to work. An inductor, depending on the application, doesn't require a core. An electromagnet requires DC to act on permanent magnets and its only job is to create a magnetic field, while an inductor is generally designed for its properties within an electrical circuit and is usually designed NOT to create large magnetic fields that will negatively affect the properties of nearby components in the circuit. That's an oversimplification and both use most of the same physics to work, but the operation and physical manifestations are very different. If these were electromagnets, you wouldn't be able to move or lift a pan while the cooktop was turned on, and of course you can. In theory an electromagnet *could* work on AC, but the magnetic poles would be constantly flipping and the strength of the field would be pulsing rapidly, making the magnetic field all but useless. Electric motors of course use electromagnets and varying currents, but in a way that makes them appear more or less stationary to the permanent magnets. An explanation of "AC" motors as used in EVs is way beyond the scope of this comment, but the bottom line is that they are still arranging the magnetic fields and timing such that the rotor is always being forced in the same direction, not alternating. The thing to remember is that a regular electromagnet is relatively stationary, and *is* stationary with respect to whatever it's holding, while motors are moving. The frame of reference in a motor is such that the current and magnetic field are relatively constant. Anyway, the bottom line is that you DON'T cook with magnets, you cook with a giant wireless phone charger. 😝
@@awo1fman do you have any book recommendations so that I can learn about Magnetic fields and such? I’m intrigued by what you’re saying but my understanding is very basic. Thank you.
Nice teardown - induction is fascinating tech and I love my induction cooktops. The only downside is finding non-stick induction ready cookware that are decent - I recently discovered Caraway ceramic pans - they are amazing. For regular stainless there is all clad, made in and tramontina. Cookware and more in the US resells all clad factory seconds and if you sign up for their newsletter twice a year they have a buy one get one 50% sale - great way to pick up all clad without breaking the bank.
@@a531016 it can be expensive if most of your existing cookware isn't useable (ie. if a magnet doesn't stick to it). Luckily I had started building my All Clad collection (after discovering factory seconds!) years before discovering induction so it was a relatively easy transition for me. Non-stick has always been an issue though - paying a couple hundred for a stainless teflon pan that will still have to be replaced eventually (regular stainless pans are effectively lifetime purchases so the high price amortizes over time) was never that appealing, and pans with ferrous disks on the bottom are never good performers. Plus teflon itself is sketchy - which is why I'm glad I found a good performing ceramic with Caraway (got mine at Costco in the US).
im seeing alot of these induction cook tops now arnt using switches at all they are using a spring coil behind the glass to act as A touch switch,sometimes these can feel abit dicky ,and need a second touch to work
If the glass surface ever cracks, DON'T USE IT! Trust me. I've never seen such a show of sparks and flames in my life when water seeped into the crack and got below. It's a good thing I was in the kitchen when it happened or my house would be gone.
The "discussion" about natural gas stoves is one sided and has nothing to do with "safety". Having said that, this was a great video. Until now I didn't know how induction burners worked beyond knowing what induction is as it pertains to my profession as an auto technician.
The Powerrating on the backside is most likely the real power it uses, so maybe thats the reason it has a 12A fuse as the total amount of current is determined by the apparent power.
True, I didn't get as far as checking the power factor, but being an inductive load, it's likely to be "bad". Mayble some of the caps are to offset this?
Inductors and electromagnets are not the same thing. These are NOT magnetic cooktops, they are induction cooktops. An electromagnet works with requires an iron core to work. An inductor, depending on the application, doesn't require a core. An electromagnet requires DC to act on permanent magnets and its only job is to create a magnetic field, while an inductor is generally designed for its properties within an electrical circuit and is usually designed NOT to create large magnetic fields that will negatively affect the properties of nearby components in the circuit.
That's an oversimplification and both use most of the same physics to work, but the operation and physical manifestations are very different.
If these were electromagnets, you wouldn't be able to move or lift a pan while the cooktop was turned on, and of course you can.
In theory an electromagnet *could* work on AC, but the magnetic poles would be constantly flipping and the strength of the field would be pulsing rapidly, making the magnetic field all but useless.
Electric motors of course use electromagnets and varying currents, but in a way that makes them appear more or less stationary to the permanent magnets. An explanation of "AC" motors as used in EVs is way beyond the scope of this comment, but the bottom line is that they are still arranging the magnetic fields and timing such that the rotor is always being forced in the same direction, not alternating.
The thing to remember is that a regular electromagnet is relatively stationary, and *is* stationary with respect to whatever it's holding, while motors are moving. The frame of reference in a motor is such that the current and magnetic field are relatively constant.
Anyway, the bottom line is that you DON'T cook with magnets, you cook with a giant wireless phone charger. 😝
@@awo1fman do you have any book recommendations so that I can learn about Magnetic fields and such? I’m intrigued by what you’re saying but my understanding is very basic. Thank you.
The big capacitor(s) are in parallel with the induction coil. It's a resonant circuit where the current bounces between the coil and the capacitor.
Tank circuit
Do you have a new editor? They had so much fun with this video, it was great to see! :D
It's crazy how simple an inductive hob is in principle.
Not new, like you said, they just had particular fun with this one! We all enjoyed it!
Nice teardown - induction is fascinating tech and I love my induction cooktops. The only downside is finding non-stick induction ready cookware that are decent - I recently discovered Caraway ceramic pans - they are amazing. For regular stainless there is all clad, made in and tramontina. Cookware and more in the US resells all clad factory seconds and if you sign up for their newsletter twice a year they have a buy one get one 50% sale - great way to pick up all clad without breaking the bank.
Yes, the cookware and compatibility does seem to be people's big reservation for adoption? Thank you for the reccomendation though!
@@a531016 it can be expensive if most of your existing cookware isn't useable (ie. if a magnet doesn't stick to it). Luckily I had started building my All Clad collection (after discovering factory seconds!) years before discovering induction so it was a relatively easy transition for me. Non-stick has always been an issue though - paying a couple hundred for a stainless teflon pan that will still have to be replaced eventually (regular stainless pans are effectively lifetime purchases so the high price amortizes over time) was never that appealing, and pans with ferrous disks on the bottom are never good performers. Plus teflon itself is sketchy - which is why I'm glad I found a good performing ceramic with Caraway (got mine at Costco in the US).
So who makes the best pans then. Those that would be most efficient using an induction harp?
im seeing alot of these induction cook tops now arnt using switches at all they are using a spring coil behind the glass to act as A touch switch,sometimes these can feel abit dicky ,and need a second touch to work
If the glass surface ever cracks, DON'T USE IT! Trust me. I've never seen such a show of sparks and flames in my life when water seeped into the crack and got below. It's a good thing I was in the kitchen when it happened or my house would be gone.
The "discussion" about natural gas stoves is one sided and has nothing to do with "safety". Having said that, this was a great video. Until now I didn't know how induction burners worked beyond knowing what induction is as it pertains to my profession as an auto technician.
Where are the scope traces of this working? Diode Gone wil did one with scope traces
Looks like a giant wireless charger
Very similar principle, even the coils are more or less the same, just smaller :D
Interesting comparison! I guess to a certain degree they are similar?
The Powerrating on the backside is most likely the real power it uses, so maybe thats the reason it has a 12A fuse as the total amount of current is determined by the apparent power.
True, I didn't get as far as checking the power factor, but being an inductive load, it's likely to be "bad". Mayble some of the caps are to offset this?
The backlight LED driver and power supply of a large flat panel LCD TV is really interesting. You might want to try tearing down one of those.
fkn magnets how do they work?