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  1. J

    Standard definition for Peak Discharge Rating?

    Is there a semi-standard definition for the momentary discharge rating of lithium chemistry batteries? If you see a lipo pack advertised at 30C, does that mean the battery will sustain a 30C pulsed discharge without damage, or that its short-circuit current rating is about 30C? Spacy reported...
  2. J

    AC Input Charger?

    I must be missing something fundamental. Why are most battery chargers designed to take low-voltage DC input? As I understand it, most users take an AC/DC converter, which itself is usually a Diode Bridge, PFC Boost Converter, and an Isolated buck converter, and then boost it up to a fairly...
  3. J

    BLDC inductance ballbark & high phase current

    I've read an idea posted several times, that the low inductance of the larger BLDC motors leads to controllers that need to manage >1kA of peak phase current. I've done some ballbark napkin estimates of what these motor winding inductances might be, and come up with a 100 uH - 5 mH range for...
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