Not necessarily, the mains power goes into switch mode power supplies to feed the hob. It's not a 50/50 split, the PSU's current limit if they dont have the required feed. The hob is a 5 ring hob BTW
New induction hob issues
- Thread starter Stoobydoo
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Indeed, according to the manual, the left top and bottom rings share a supply and the middle and two right hand side rings share another supply. We have seen the sharing in action with one ring on power boost mode and another ring being limited to just over half power. Quite ridiculous coming from a gas cooker. Having said that, there is no doubt in my mind that there is a problem with the hob. It’s almost as if it’s on half power. Hopefully we get the answer when the engineer visits.
With my induction hob you have to select that you want to pair hobs, normally they are all independent.. The boost function, when selected, seemingly "pinches" power from the other in the pair and that would seem to be what is happening to yours. One of your rings is usually a higher rating and provided the pot diameter matches, this will boil fastest, without boosting (which I have never had the need to).
The diagram shows the alternate configuration for a single phase supply using a bridge to a two phase supply using a 50/50 split how many rings on each phase is irrelevant unless you are trying to balance the phase with another appliance, but irrelevant to the hob wiring.
Phil Pascoe
Established Member
Four rings on my Zanussi. I can't use boost on two rings on the same side at the same time. The only downside of mine is the control panel, it's on the top surface at the front, so I can't put a steel griddle or large oven pan across the two front rings because it cuts out.
My understanding is that boost is only for individual rings as the boost reduces power to the "pair" ring.. On mine pairing is LF & LR or RF & RR so I can have a large pan spanning two rings but only front to rear and my controls are also at the front. I have never had reason to boost and have rarely paired. As my range cooker replaced a gas hob/electric ovens range cooker, I much prefer the induction hob over the gas.
My Neff induction hob does not have rings what Neff call Intuitive flex zones on either side that adjust automatically to the size of pan placed on them, once the size of pan is established moving the pan vertically automatically adjust the power to simmer, Neff call that "Power Move' seems to work no matter what is in the pan?
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I'm not quite sure what point youre making here. My theory is that each phase of the two phase input feeds a switch mode PSU. That being the case IF the link was missed the result code be half power operation. Only a thought, not being on site and witnessing whats happening first hand and not knowing the internal setup of this AEG hob makes it somewhat difficult.
I think that when looking at an induction hob you need to forget the mindset of the old types of electric cooker completely simply because induction hobs do not use the 230 Vac directly like when we had the glowing rings. The major difference is that the frequency required by an induction hob is much higher, and as mentioned above they use a type of SMPS that is probably along the lines of a half bridge. The clever ones know when a pan is placed on the hob and can control zones, this is again going to be like a ferromagnetic sensor that can detect a metal object passing its face but in this case it is a pan being placed above a coil. Being this more complex then it will have various safety features and protection built in so having that AEG engineer is hopefully going to resolve the issue.
Yep, absolutely correct.
Generally between 25 and 50 kHz so very much higher than our 50 Hz grid supply.
Nooooo, half bridge nowhere near. SWMPSU takes the 240v AC, rectifies (Full Wave) it to 350 vDC and then uses a physically small transformer and/or inductor at high frequency to convert the 350v DC down to whatever voltage is needed for the induction circuits. SWMPSU's are very powerful, very efficient, light weight and relatively cheap.
They use the induction coils under the ring area with a low power pilot signal going through, works in the same way as a metal detector. The inductance changes when a pan is present and the 'ring' is enabled to allow the higher current into the induction coils.
Aye, it's a quality item and it should perform really well, my son has the exact same hob and it works really well, we have a Bosch hob and that too is pretty rapid. Having a company engineer check out should resolve any issues / uncertainties.
I have had one other thought, the sparky may have wired it with Live to L1 and Neutral to L2, that would half the power.
Half bridge topology is good for higher powered systems where you do not want any Dc component in your inductance and controlling the frequency will control the power transfered. What made me think of this is that years ago this sort of supply was provided to a company making machines for induction hardening and the drawing below is for an induction hob, well one coil of and the principle is the same in that they use a resonant invertor technology.
Hi,
Crossed wires from me, interesting! It looks a very distinct possibility the block diagram.
J
I would say IGBT's have been a real help in the design of power electronic's and you appreciate them more if you started in the days of just Bipolar devices and then Mosfets as the IGBT gave us the Mosfet gate drive and Bipolar collector Emitter characteristics and before this we had to use fancy driver chips from the likes of SGS Thompson which many will remember especially if needing a high and low side driver where the high side switch needed a floating drive.
okeydokey
Established Member
In view of all of the above I can't see my changing from gas to an induction hob when I refurb my kitchen later in the year.
The biggest advantage of the induction hob is keeping it clean. I prefer my NEF gas hob and electric oven with steam as you can use any pans on the hob and with the click settings you get precise gas control.
What an odd take. One member having an issue with a newly installed hob and you write off the technology? I fitted our induction hob 8 years ago, it's missed a beat, is really easy to clean because it's flat and nothing burns on to it, it looks as good today as when it was installed, the response is quicker than gas, it's a delight to own and use. You don't have a naked flame or poisonous fumes in your kitchen either.
Distinterior
Established Member
I install fitted kitchens and appliances for a living, including induction hobs on practically every job....( On average, I may only fit 1 or 2 gas hobs a year now.....)
I have a working induction hob on display in my Showroom to show potential clients how quick, clean & controllable they are.
One challenge that can arise, is convincing someone that has only previously used a gas hob as they are often concerned about the controllability of induction......Having the induction on display really helps put their concerns to rest.
In all of my 44 years in the business, I have never had a client that has regretted the change from gas to induction.
I have a working induction hob on display in my Showroom to show potential clients how quick, clean & controllable they are.
One challenge that can arise, is convincing someone that has only previously used a gas hob as they are often concerned about the controllability of induction......Having the induction on display really helps put their concerns to rest.
In all of my 44 years in the business, I have never had a client that has regretted the change from gas to induction.
