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zeropointbug · 11.27.2006, 11:27 PM

Jeoling,

I have always wanted to do the same thing, running high voltage on a high turn motor. This WOULD cut the heat losses due to wire resistance in HALF. Say, if a 7XL was running 82% efficiency at 5s LiPo, then a 14XL running on 10s LiPo would maybe run at 86 - 88% efficiency. There are other factors with contribute to heat loss however. The controller is the same thing, for a given ON resistance of a controller, the heat dissipation goes up the square of the current being switched.

So yes, by doubling the system voltage, the overall efficiency goes up quite a bit.

AT THE MOMENT, as battery technology is changing so quickly, there isnt really a standard for voltages yet (not that there should be), but until we remove the BATTERY bottleneck (still not there yet!) there will be alot of options out there, and prices will be higher also.

Not to get too carried away... i hope Quark comes out with a 10-12s LiPo (~60 amps) capable controller next year.

	(#8)
zeropointbug Z-Pinch racer Offline Posts: 3,141 Join Date: Nov 2006 Location: SK, Canada	11.27.2006, 11:27 PM Jeoling, I have always wanted to do the same thing, running high voltage on a high turn motor. This WOULD cut the heat losses due to wire resistance in HALF. Say, if a 7XL was running 82% efficiency at 5s LiPo, then a 14XL running on 10s LiPo would maybe run at 86 - 88% efficiency. There are other factors with contribute to heat loss however. The controller is the same thing, for a given ON resistance of a controller, the heat dissipation goes up the square of the current being switched. So yes, by doubling the system voltage, the overall efficiency goes up quite a bit. AT THE MOMENT, as battery technology is changing so quickly, there isnt really a standard for voltages yet (not that there should be), but until we remove the BATTERY bottleneck (still not there yet!) there will be alot of options out there, and prices will be higher also. Not to get too carried away... i hope Quark comes out with a 10-12s LiPo (~60 amps) capable controller next year. “The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens