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Load Matching | 18 comments (18 topical, 0 editorial)

Re: Load Matching (3.00 / 0) (#5)
by willib (willibur at comcast dot net) on Mon Oct 2nd, 2006 at 08:58:51 AM MST
(User Info) http://www.njwind.com/webcam.html#

flux i dont see it..
in all but the first example ,
the current in the fets is not going from drain to source ?
sorry to through a monkey wrench in the works , but ...
if i'm wrong , i apologize in advance
Carpe Ventum (seize the wind)

Re: Load Matching (3.00 / 0) (#6)
by Flux on Mon Oct 2nd, 2006 at 09:38:16 AM MST
(User Info)

In boost mode the volts are not high enough for the bridge diodes to conduct to battery. You have three wires with voltages on them at any instant and you short the lot together with fets. The positive ones will conduct in the conventional way. Those negative would conduct via the body diode but as all fets are gated they will actually conduct through the fet in the third quadrant. When you remove gate signal the conduction to the battery is via at least one bridge diode and a mosfet body diode.

You can amuse yourself for some time sorting out the various conduction paths but it really is nothing more than a modified boost converter.
Flux

[ Parent ]

Load Matching | 18 comments (18 topical, 0 editorial)

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