AD7750 o/t
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Posts: 46,084
S. Promena
OK, thanks for the info on the AD7750.
The data sheet on this chip is excellent, guess I should have figured out
page 2, i.e. bandwidth 3.5kHz.
I have seen a device that measures kilowatt-seconds of an induction coil so
had this neat little idea that this
could be done with this chip and a Stamp and a couple
hall effect sensors.
Anyway looks like the usual 100kHz(?) to 450kHz[noparse][[/noparse]I know one machine is
definitely 450kHz] wouldn't make
this project doable.
Thanks again,
Mark
Original Message
From: s premena <premzee@j...>
To: basicstamps@egroups.com <basicstamps@egroups.com>
Date: Saturday, August 12, 2000 3:26 PM
Subject: [noparse][[/noparse]basicstamps] RE:AD7750
>>>>>
> Date: Fri, 11 Aug 2000 11:31:05 -0700
> From: "techno_masai" <plunkettm@e...>
>
>Its way out of my league, but I was thinking about hooking up that
>circuit
>shown on the page 13 of spec sheets.
>
>Was wondering, once I got familiar with the circuit if it could be
>adapted
>to measure the power output from an induction heater coil.
><<<<
>
>The short answer, I think, is... no.
>
>Induction heating is done usually with radio frequency energy
>which is outside of the capability of the AD7750.
>
>You need a directional wattmeter which can give you the
>net power delivered to the induction head - this is because
>in the transmission line to the head you have a forward and
>reflected component of energy. It's a bit complicated and
>probably not a subject for this list... [noparse][[/noparse]involving neither
>Linux nor Win2K :-) ].
>
>
>________________________________________________________________
>YOU'RE PAYING TOO MUCH FOR THE INTERNET!
>Juno now offers FREE Internet Access!
>Try it today - there's no risk! For your FREE software, visit:
>http://dl.www.juno.com/get/tagj.
>
>
>
>
OK, thanks for the info on the AD7750.
The data sheet on this chip is excellent, guess I should have figured out
page 2, i.e. bandwidth 3.5kHz.
I have seen a device that measures kilowatt-seconds of an induction coil so
had this neat little idea that this
could be done with this chip and a Stamp and a couple
hall effect sensors.
Anyway looks like the usual 100kHz(?) to 450kHz[noparse][[/noparse]I know one machine is
definitely 450kHz] wouldn't make
this project doable.
Thanks again,
Mark
Original Message
From: s premena <premzee@j...>
To: basicstamps@egroups.com <basicstamps@egroups.com>
Date: Saturday, August 12, 2000 3:26 PM
Subject: [noparse][[/noparse]basicstamps] RE:AD7750
>>>>>
> Date: Fri, 11 Aug 2000 11:31:05 -0700
> From: "techno_masai" <plunkettm@e...>
>
>Its way out of my league, but I was thinking about hooking up that
>circuit
>shown on the page 13 of spec sheets.
>
>Was wondering, once I got familiar with the circuit if it could be
>adapted
>to measure the power output from an induction heater coil.
><<<<
>
>The short answer, I think, is... no.
>
>Induction heating is done usually with radio frequency energy
>which is outside of the capability of the AD7750.
>
>You need a directional wattmeter which can give you the
>net power delivered to the induction head - this is because
>in the transmission line to the head you have a forward and
>reflected component of energy. It's a bit complicated and
>probably not a subject for this list... [noparse][[/noparse]involving neither
>Linux nor Win2K :-) ].
>
>
>________________________________________________________________
>YOU'RE PAYING TOO MUCH FOR THE INTERNET!
>Juno now offers FREE Internet Access!
>Try it today - there's no risk! For your FREE software, visit:
>http://dl.www.juno.com/get/tagj.
>
>
>
>