1000V high side gate drive
in [Design]
|
Prev: SPDIF amplifier
Next: Which uController to learn?
From: Mook Johnson on 8 Mar 2007 07:45 Most of the ate transformers I've seen require 50KHz operation or higher. I didn't want to switch that high to minimize switching losses. I don't care if the motor whistles, no one will hear it. "Marte Schwarz" <marte.schwarz(a)gmx.de> wrote in message news:45efd39e$0$23139$9b4e6d93(a)newsspool1.arcor-online.net... > Hi Mook, > >> I'm looking for a high side IGBT gate driver for use with a 1000V bus >> voltage. I prefer something like an IR2110 but it is only rated for >> 600V. >> >> Anything else out there besides gate drive transformers? > > Why not Gate transformers? The nice small ethernet transformers works > great. > > Marte >
From: Mook Johnson on 8 Mar 2007 07:48 Good idea, I will look into these. I guess I could use the same bootstrap circuit used on the ir2110 and charge a cap through a diode when the low side FET is on then use that cap as a floating supply. "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:rquuu2lghst7k7p8tfsbj164k32nbgfvkr(a)4ax.com... > On Wed, 7 Mar 2007 20:38:44 -0600, "mook Johnson" <mook(a)mook.net> > wrote: > >>Gents, >> >>I'm looking for a high side IGBT gate driver for use with a 1000V bus >>voltage. I prefer something like an IR2110 but it is only rated for 600V. >> >>Anything else out there besides gate drive transformers? >> >>This is for a 3 phase AC induction motor inverter PWM switched at 10 - >>20KHz. >> >> >> > > Optoisolate, into a floating gate driver powered by a small dc/dc > converter, maybe. Or use one of those slick ADuM series logic > isolators, good for 5 KV. > > Didn't HP/Agilent/Agere have some parts like that, too? > > John >
From: Winfield Hill on 8 Mar 2007 08:56 Mook Johnson wrote: > Spehro Pefhany wrote > >> the renowned "mook Johnson" wrote: > >> >Gents, >>> >>> I'm looking for a high side IGBT gate driver for use with a 1000V bus >>> voltage. I prefer something like an IR2110 but it is only rated for >>> 600V. Anything else out there besides gate drive transformers? >>> >>> This is for a 3 phase AC induction motor inverter PWM switched at >>> 10 - 20KHz. > >> What's wrong with something like the IR2213? > > I didn't know IR made a 1200V high side gte driver. Last time I > checked, they only carried 600V models. > > thanks They've been making 1200V parts for at least 8 years, and they include in their lineup complete three-phase chips (six drivers). The difficulty used to be finding distributor stock. DigiKey now has stock on the IR2130, IR2131, IR2132, IR2135 and IR2137. Some are available in 28-pin DIP packages.
From: John Larkin on 8 Mar 2007 11:28 On Thu, 8 Mar 2007 06:48:45 -0600, "Mook Johnson" <mook(a)mook.net> wrote: >Good idea, I will look into these. I guess I could use the same bootstrap >circuit used on the ir2110 and charge a cap through a diode when the low >side FET is on then use that cap as a floating supply. Or buy a dip or sip $8 dc/dc converter. John
From: Marte Schwarz on 8 Mar 2007 11:47
Hi Mook, > Most of the ate transformers I've seen require 50KHz operation or higher. > I didn't want to switch that high to minimize switching losses. I don't > care if the motor whistles, no one will hear it. If you spent the gate unit a little more than only the transformators windings then you will be able to switch a few Hz. I do this from near 0 Hz up to a few 100 kHz across a 5 kV barrier, OK here I don't use ethernet transformers, but for 1 kV they are OK easy available and cheap. A very nice Appnote is AN461/0194 from ST. May be it is not exactly what you need, but the ideas behind this paper should lead you to a good solution. A good idea may also be the AN-950 from International rectifier. Marte |