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Old 11-23-2015, 05:53 PM   #2354 (permalink)
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Originally Posted by MPaulHolmes View Post

As for the boosting, where is the 3x current coming from?
looking at the phase current (I've modeled it here as 100a peak/phase) being fed through the inverter switches, you have 1 output switch (diode) on the boost converter that has to feed all of them, and it toggles between 0 amps and about 2x the output current (50% duty cycle), with the capacitor filling in the gaps, plus large voltage switching. So it is really 3x an inverter switch plus 6x the peak capacity if you really want to push it. Similar story for the lower switch, turns on at pack voltage or higher, turns off at boost current. boost converters have really noisy output.

an inverter switch sees about 32 amps average here, while the simulated boost switch is running at about 96 amps average. It seems like that would severely limit what a controller is capable of if it is an integral part using identical switches.
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Last edited by P-hack; 11-23-2015 at 05:59 PM..
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