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Originally Posted by Alan Anderson
The Victor speed controllers do use pulse width modulation of the power to the motor. The H-switch inside them is a digital device, either completely off or completely on in one direction or the other. The average voltage to the motors is controlled in approximately 1% steps, but the peak is always full battery voltage.
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You're right about the PWM control although I'd say the H-bridge is also an analog device but that's beside the point. I really need to think through before I post.
While peak-voltage is still the same, the voltage changes over time. What that means is that the power is changing over time. But it's happening fast enough that it's really not noticable. Instead, you'd be looking at the average voltage for power calculations, not peak power.
Matt