wow. thanks guys. first of all you should know i am only in circuits 1, none of my classmates even know what a diode is.. so while ive learned a massive amount on my own, i'm missing certain key concepts.
there are like 6 posts with very relevant information. too many to reply to directly. many of the fundamental issues like instantaneous voltage ect i was anticipating.. but i obviously hadnt thought the actual hookup through.. they cant have series inputs and || outputs hahah took me 5 seconds after reading that to feel like an idiot!
i believe you all have assumed the application correctly.. im lowering my main (actually 148vdc lith-poly) battery voltage ("tapping it") to power everything beside the motor.. and with such high dv/dt the main 148v battery voltage is naaaasty.
i looked for days seemingly EVERYWHERE for dc-dc or linear solutions... seems like a premade(i really dont want to make my own, .. one learning experience at a time) dc-dc only come with max Vin of 75v...
i ended up checking out powerex, who actually makes the 1200v, 600amp igbt im using, and they sell exactly what i need: M57182N-315
(
https://www.electro-tech-online.com/custompdfs/2009/05/m57182n_315.pdf)
and their gate driver seems to be the most rugged one stop shopping solution i have ever seen.
i will use the above HV to 15Vo DC-DC .... into one of their 12A, optically isolated/ dc-dc isolated/ +15v,-10v gate drivers. perfect.
i had searched digi, mouser, allied, farnel,newark .. not one had what i needed.
so i just wanted to see, out of curiosity, if there even was a inefficient/simpler way of dropping 133v while retaining 100-200ma. still seems like its not even possible besides an old fashion voltage divider with resistors the size of new Mexico.
i was curious because this huge motor is on a mountain bike, and my 148v, 4amp lithium polymers will only last around 3.5 minutes at 10KW.. so a handful of watts lost at a fixed amount per unit time is no big deal .. so i wanted to see if there was a simpler way besides dc-dc.. mostly for future knowledge since i found this powerex combo.
so i gather hooking a bunch of linear reg in CASCADE(sorry, we just started 2 port networks in school) IS doable, if input caps are huge(makes sense)... .. for each?