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Small scale solar MPPT wins 21% | 47 comments (47 topical, 0 editorial)
Re: Small scale solar MPPT wins 21% (3.00 / 0) (#9)
by DamonHD (d@hd.org) on Thu Aug 28th, 2008 at 06:10:28 AM MST
(User Info) http://www.earth.org.uk/

I'd have thought that it could be a very strange and difficult-to-gauge sort of 'resistance', with possible negative/transconductance/tunnel/bizarre elements to it, at least potentially.  But I've never tried, so I don't know.

Nonetheless, it could possibly be calibrated once with known currents (and gate voltage, etc) and simply looked up in a table thereafter (with interpolation).

Rgds

Damon

[ Parent ]



Re: Small scale solar MPPT wins 21% (3.00 / 0) (#10)
by oztules (oztules__at__bigpond.com) on Thu Aug 28th, 2008 at 06:30:24 AM MST
(User Info) http://www.anotherpower.com/gallery/Oztules-toys

I have used this technique for current monitoring for DC motor speed control. (analog though) I sync it so that I measure the voltage drop during on periods..... seems to work ok for over current monitoring.

You may be right for sensitive realtime things.... although worth a thought.

.........oztules
Flinders Island Australia
[ Parent ]



Small scale solar MPPT wins 21% | 47 comments (47 topical, 0 editorial)

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