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Originally Posted by MPaulHolmes
Hi nlc! I'm hoping for 200amp. My friend's 3 phase controller uses 760uF, and is rated for 400ampRMS and uses a DC bus of 330v.
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It's a commercial controller or he build it himself ?
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It does cause ripple from the batteries, but works very well.
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I believe the ripple is less important when using FOC, because of the simultanous PWM on 3 phase with PWM configured in centered mode.
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He also did one that is rated for around 200ampRMS and uses 380uF.
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Ok thus the 400A controller is diy too !!
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So, rather than basing anything on math, I'm just basing it on him doing it and it working. haha.
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No really other solution, I never find magical formula to choose the capacitor value. I believe the most important thing is the ESR, not the total capacitor value.