Re: inverting high voltage
- From: Winfield Hill <Winfield_member@xxxxxxxxxxx>
- Date: 27 Oct 2006 05:09:51 -0700
mark2006 wrote...
Thank you for your replay!
I have found some web sites regarding IGBT's.
Question:
As you have read, in my first idea i have low power ( 0,5 A ).
1.) Can i use 600V (or other ) IGBT for this applikation,
regarding low power?
Yes of course. My technician's 6-year-old washing machine
failed recently and they wanted $500 for a new circuit board,
so I learned the details of its electronics to repair it.
The Sears Kenmore design was sophisticated 3-phase VFD with
an Analog Devices DSP and IR IGBT drivers and IGBTs. But it
used a simple, cheap 340V to 16V converter, which failed and
wiped out ICs, IGBTs and all kinds of stuff. The Kenmore
design used six reasonably-hefty IGBTs to make its 3-phase
sine waves; the IGBTs cost only about 60 cents each, IIRC.
You can get small 600 to 1200-volt MOSFETs, but, for voltage
ratings of 400V or higher, an IGBT of a given die size can
carry more current than a same-size MOSFET. An IGBT costs
less and delivers more performance. But you can certainly
find nice small-die IGBTs for modest-power applications.
2.) What would you do to reach the "goal" part ?
3.) How long can i "produce" AC power ( 220V ~ 50Hz ) with
this configuration ?
These PWM power converters are quite efficient, so simple
load-power and battery-energy calculations should work.
--
Thanks,
- Win
.
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