Induction cooktops and RFI?

[Karl W4KRL]

Terry,

Induction cooktops operate between 24 and 50KHz. There is probably a lot of potential for RFI near the range.


73 Karl W4KRLTerry Fox <tfox at knology.net> wrote:Thanks Andre!  My spec an only goes to 3GHz.  The whole idea was to know what they (induction cooktops) do BEFORE I buy one.
 
Maybe you could camp out at the local Sears with your spec an, and test for me??
Terry
 
 
From: André Kesteloot
Sent: Thursday, April 12, 2012 8:11 PM
To: Terry Fox
Cc: mailto:andre.kesteloot at ieee.org ; mailto:tacos at amrad.org
Subject: Re: Induction cooktops and RFI?
 
Well ,I have here a spectrum analyzer that goes to 200 MHz.
 
Buy me a similar cook- top, have it delivered free-of-charge to my castle, and I shall be pleased to investigate whether it nastily radiates  HF waves, or not .
This service will be at no charge to you
:-)
73
André

Sent from my iPhone; eventual mIstAkEs should be blamed on the thickness of my fingers :-)

On 12 Apr 2012, at 19:48, "Terry Fox" <tfox at knology.net> wrote:

From: Andre Kesteloot
Sent: Thursday, April 12, 2012 6:59 PM
To: tacos at amrad.org ; Terry & Judy Fox
Subject: Re: Induction cooktops and RFI?
 
On 4/12/2012 18:31 PM, Terry Fox wrote:
Does anyone use an induction cooktop, and can tell me if there is any RFI from it to ham bands?
Thanks
Terry, WB4JFI
 


Terry, 

We don't have an induction cook-top, but
isn't the induction coil powered by the 60Hz mains ?
73
André
I was more worried about the control circuitry, and if there is a solid-state switching of the element.  Since induction is designed to radiate a magnetic field (albeit at 60Hz?), if that field is controlled by higher-speed devices, there might me more radiation?  Or not..
 
Do they do PWM for the control?  It also seems that there are a lot more “steps” in the control than a traditional electric cooktop.
Terry
 
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