That's why I really like those SOT-227 modules. They're much smaller than the "bricks" and they still use bolt-on busbars.
Regarding SiC diodes, my old spreadsheets (this was done about 10 years ago) indicate a forward voltage of 0.86V for a 1kW boost converter. I know parts have improved since then, for example I can't wait till this is available:
All-SiC and Si IGBT + SiC Rectifier CoPack from GeneSic Semiconductor
That Infineon IC that I used was truly amazing. It tracked the input current and adjusted the output so that the Power Factor was always near 1. The switching frequency I designed for was 100kHz, and I used a torroidal inductor.
In addition, Infineon also provided some good information for designing boost converters.
http://www.infineon.com/dgdl/Product...12b427caa43ccf
http://powerelectronics.com/site-fil...g/410pet21.pdf
ICE2xXXX ... - Datasheet Search Engine Download
- E*clipse
Quote:
Originally Posted by cts_casemod
You're not the only one there. The brick modules make life much easier. No issues paralleling devices or crazy DC-LINK inductance calculations.
And for that, one has to stick with 30KHz or less, although for a charger the smaller modules may be a good option. Say a modular approach with 2KW per converter or so.
e*clipse what was the voltage drop of the SiC PFC diode on your boost converter?
Speaking of which, my PIC has two additional PWM channels for PFC correction (or whatever else you feel you want then for), in addition to the motor controller. Perhaps your device has an option to do the same, Paul
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