electronic speed controller (ESC)

An electronic speed controller is a device that converts DC power from a battery into three-phase AC current to drive a brushless motor.

The electronic speed controller acts as the primary interface between the battery and the motor. It is responsible for regulating the motor’s speed or torque based on commands received from the flight controller.

Beyond power conversion, the device serves a protective function for both the motor and the battery. In professional applications, these controllers are designed to handle telemetry data and withstand harsh environmental conditions.

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