Author Topic: Induction stove pan sensor, how does it work  (Read 876 times)

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Offline n3mmrTopic starter

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Induction stove pan sensor, how does it work
« on: June 04, 2020, 10:08:14 am »
My induction stove won't start heating a pan with a bottom ø < 11-12 cm (4½-5").
Is that something you can adjust by some parameter in some MCU chip or some strap code or something?

I CAN live with this. By introducing a trigger pan close by for a second or two, the stove will start heating and, hysteresis!, will keep heating the small pan after the trigger pan is removed.
But I'd rather not have to keep a trigger pan on standby.
 

Offline T3sl4co1l

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Re: Induction stove pan sensor, how does it work
« Reply #1 on: June 04, 2020, 03:36:36 pm »
I doubt it's going to be very hackable.  The control is likely either ASIC, mask ROM, or at least protected (including the label ground off?), and replacing it will likely require knowledge of resonant power control and protection algorithms, in DSP, with hard real-time requirements.

But as for how it works, sure -- it's pulsing infrequently, and when it detects a change in the frequency and/or damping of the ringdown, it starts up.  It stops when it detects too little load (which might manifest as, too high voltage on the resonant node).  These are different conditions so it makes sense for there to be generous hysteresis between them.

Is the pot in question, an induction-compatible (usually steel-bottomed) pan, or no?

Tim
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Offline n3mmrTopic starter

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Re: Induction stove pan sensor, how does it work
« Reply #2 on: June 04, 2020, 07:11:50 pm »
All the pans mentioned/used in the test are intended for induction stoves.
 

Online NiHaoMike

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Re: Induction stove pan sensor, how does it work
« Reply #3 on: June 05, 2020, 02:09:44 am »
Try offsetting the pan towards the front or sides, that might cause it to couple better and keep the inductance high enough.
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