Originally Posted by JetPlaneFlyer
Actually that's pretty much what an ESC does.. it controls voltage on it's output side (voltage on the input remains at battery voltage).It does this by by turning the power on and off very fast, so if it's supplied with 12v and it outputs on-off pulses that is off 50% of the time (zero volts) and on 50% of the time (12v) then the average voltage output is 6v. Because the rate that the power is turned on and off is so high the motor responds exactly like it would if fed with smooth 6v.
Not quite the average voltage. All answers in this thread by seasoned EE's (I'm an EE gone over to the dark side, embedded software), Bruce Abbott designed a few diy controllers and Greg Kamysz was involved in the first brushless RC motors/controllers:
http://www.rcgroups.com/forums/showthread.php?t=1664402
Picture from
http://www.consult-g2.com/
-> course
-> chapter 9: electronic controllers
Picture from
http://www.aerodesign.de/peter/2001/...index_eng.html
-> Why does the Torquemax rotate so slowly and so forcefully
and
-> Speedy-BL diy brushless controller
Voltages at partial throttle
Prettig weekend
Ron
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