Quote:
Originally Posted by MazdaMatt
Ben,
You say higher voltage makes for the same work at lower current. This is true, P=VA... but isn't the force generated by an electric motor ONLY proportional to current? If i recall correctly from electromagnetics class (way back), F=cAT (c is a constant, Amps, Turns).... (I'm really sketchy on the electromagnetics details).
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That's where the controller comes in. This is not technically quite correct, but by controlling the duty cycle, the controller essentially outputs high current at very low voltage at low RPMs, and outputs lower current at higher voltage at high RPMs, while drawing the same current/voltage at the battery.