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Any circuit for driving a motor that's more complex than wiring it to a power source through a simple on/off switch. Examples include speed and torque control using H-bridges, brushless motor controllers, stepper controllers, VFDs. Constant speed examples include relay control, reversing, reduced-voltage starting, overload protection and other control requirements more complex than a simple 0n/off switch.

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motor controller requiring a battery in parallel with DC power supply

The reason that they suggest a battery is efficiency (And back-EMF protection, cheers Tony). The battery can store the energy generated from regeneration, and then it can be used when you next demand …
Rendeverance's user avatar
1 vote

Lipo - ESC - Motor combinations

If the 20C is continuous, burst capacity (usually <10s) will likely be something like 30C so you should be fine. I am not sure what props etc you are running but 12A escs seem a bit low, as your motor …
Rendeverance's user avatar