servoESC

servoESC is a term used in radio-controlled hobbying to describe an electronic speed controller designed to be driven by a servo-style PWM input. It is used to drive brushless motors in models such as planes, boats, and multirotors. The input signal typically uses the same 3-wire connector as a standard RC servo, delivering a 1–2 millisecond pulse within a roughly 20 millisecond frame. The ESC translates that throttle signal into switching of the motor’s three-phase MOSFETs to vary speed, and many units include a BEC to power the receiver.

Most servoESCs support sensorless or sensored motor configurations and offer programming options such as end-point calibration, braking, soft start, and throttle-response curves. Configuration is usually performed with a programming card, USB adapter, or through a flight controller. Common safety and reliability features include arming procedures, failsafe throttle, overcurrent protection, and low-voltage cutoff to protect lithium-polymer batteries.

ServoESCs are valued for compactness and compatibility with conventional RC servo gear, making them suitable for small drones, boats, ground vehicles, and robotics projects that rely on servo-like control signals. When selecting a servoESC, users should verify motor type (brushless), current rating, input signal timing, and whether the device provides the required protection features and power to the receiver via BEC.