That said, i too would like to know if it can be hacked/made for 30-32s capable, as im building a mid drive, so i want to spin the motor fast, for efficirncy both of motor and controler, particually at low speeds.
I don't understand your logic with this. How does high voltage = good efficiency? Efficiency is based on the overall system. It's a little more efficient to use a battery voltage that give you the desired top speed for the KV of your motor.
I dont so much want high top speeds, but efficient, high power from 5-60ishkm without worrying bout controller or motor. A 4115 or equivilant version wold have me(and a few others i imagine) lining up. Ive been chasing the russians to see if they can produce a hv version of theirs too, but getting a respone from them is kinda hit and miss........
If you don't want high top speeds, but you want high voltage, what are you doing? Every reduction gear stage robs you of several percent efficiency. For a mid drive it's most efficient with just 1 stage, chain to drive gear. If you don't need high speed, then you don't need high voltage, you need a motor that has the correct KV. For that matter if you did want high speed you could do it with low voltage, it would just require more amps.
This controller is not easily hackable for higher voltage, it's much much more complex than a Xie Chang controller. Huge difference in how it rides and how much better the features are.
sorry, looks like i didn't make it clear... the logic is that I already have (own) a motor that I want to use, due to its size, weight, power density and other features. I'd like to keep battery amps <80, probably at around 60, and have a effective wheel diameter (from the reduction stage) of <13inches, in a 26" wheel.
The efficiency isn't from high voltage, but high rpms. And yes, not higher peak so much as a wider high efficiency band, and generally speaking, 'easier' for the controller to run at high load, low speed, trials type riding - while still providing a good top speed. and please note, i'm saying high power to 60km'h - ie a top speed of 80+, so the peak power output comes somewhere around 50km'h.
For the power level, and speed that I want, this means running around 30s lipo to get the necessary voltage.
The reduction stage is a nessasary loss that i have to live with, since I absolutely dont want a hub drive (unsprung weight) - particularly wanting something that will easily handle >6kw without a thought being given to heat, nor do I want the look of a hub motor, though thats far less important.
Hope that clears things up... Basically, im constrained by the motor that I have/want to use. I can use an infinion with 4115's... but since I havent bought one yet, I hoped this might be a possible better alternative. Unfortunately not though it seems... thanks anyway.