Gate resistor
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From: Tim Williams on 13 Apr 2010 00:59 So anyway.. Hint: gate drive transformer. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms "Tim Williams" <tmoranwms(a)gmail.com> wrote in message news:7b9005d3-5d73-451e-a739-538f864b08ba(a)30g2000yqi.googlegroups.com... > Neet. I increased the gate resistors on a half bridge MOSFET > inverter, and switching loss dropped significantly. > > Tim
From: Tim Williams on 13 Apr 2010 01:00 No, that's unrelated. Posts from Google (such as Bill's) don't seem to quote automatically. I have to add the quotation marks manually. This seems to coincide with the header line: > Content-Transfer-Encoding: quoted-printable so if you can disable that, please do. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms "JosephKK" <quiettechblue(a)yahoo.com> wrote in message news:uqt7s5h5f3iao2nj000597oh6js7f4giio(a)4ax.com... On Sun, 11 Apr 2010 20:29:32 -0500, "Tim Williams" <tmoranwms(a)charter.net> wrote: >"John Fields" <jfields(a)austininstruments.com> wrote in message >news:fpg4s5hc67jkkojc5or85snnn2qpfln9sf(a)4ax.com... >> If all of the rest of us have agreed to bottom and inline post, why are >> you the last holdout among the "regulars" who insists on top posting? >> >> You're obviously not a newbie and your posts are generally helpful, so >> why do you make them hard to read? > >I have never had trouble reading a top post, and in many cases I prefer to. >Do you have a brain disease or something? > >Sad that an engineer can't even comprehend the engineered usefulness of >appropriate top posting. > >Tim Not only that, it seems to mess up proper quoting on your outhouse express news client.
From: SilverLeo on 13 Apr 2010 01:52 Il Mon, 12 Apr 2010 23:59:33 -0500, Tim Williams ha scritto: > Hint: gate drive transformer. Saturated?
From: Tim Williams on 13 Apr 2010 05:54 "SilverLeo" <void_address(a)void.com.invalid> wrote in message news:fETwn.157137$813.106119(a)tornado.fastwebnet.it... >> Hint: gate drive transformer. > > Saturated? Nope, Bmax ~ 30mT. It's actually got "way too many" turns for this frequency, but that just means magnetizing current will be plenty low. Which also rules that out. Driver is MOSFETs anyway, so the primary waveform is essentially ideal. Keep guessing :) Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms
From: John Fields on 13 Apr 2010 10:57
On Sun, 11 Apr 2010 20:29:32 -0500, "Tim Williams" <tmoranwms(a)charter.net> wrote: >"John Fields" <jfields(a)austininstruments.com> wrote in message >news:fpg4s5hc67jkkojc5or85snnn2qpfln9sf(a)4ax.com... >> If all of the rest of us have agreed to bottom and inline post, why are >> you the last holdout among the "regulars" who insists on top posting? >> >> You're obviously not a newbie and your posts are generally helpful, so >> why do you make them hard to read? > >I have never had trouble reading a top post, and in many cases I prefer to. >Do you have a brain disease or something? --- Perhaps. I'm most comfortable reading from left to right and from top to bottom, where the top is older, chronologically. You know, the way most of us with brain disease or something write sensible English text. YMMV. --- >Sad that an engineer can't even comprehend the engineered usefulness of >appropriate top posting. --- What Speff said... JF |