Quote:
Originally Posted by Gabe001
Where do you guys get the smoothing caps from?
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Going over 500V rating does seem to be a difficult area with electrolytics- "570V MAX" is the highest I've seen on '30s HT electrolytics and things don't seem to have greatly advanced since with uncommon modern 600V types having somewhat poorer temperature, ripple rating, ESR, life expectancy etc. than their 500V stablemates and being disproportionately larger and more expensive, all else being equal. There's obviously a fundamental limitation at this sort of voltage. The world of HF inverter drives has produced high-capacitance plastic film capacitors of 1 to 100uF+ at voltage ratings ranging from 630V to well over 1000V whose ripple current ratings and ESR make electrolytics look pretty lame- whilst they're still somewhat larger and more expensive than comparable electrolytics, it's a competitive market and the difference is less marked than it was in the past.