X-Star ESC 7 A - Brushless Speed Controller, 2S-3S LiPo, 5 V BEC

Product overview

• Electronic speed controller (ESC) for brushless motors with up to 7 A continuous current
• Operating voltage: 2S to 3S LiPo (7.4 to 11.1 V)
• PWM input signal from a receiver or microcontroller
• Programmable protection functions against undervoltage and overheating
• BEC output (5 V, 2 A) for powering the receiver
• Compact design with directly soldered motor connections

Product description

The electronic speed controller regulates the speed and direction of rotation of brushless motors using pulse-width modulation. The maximum continuous load of 7 A limits its use to lower-powered motors and lightweight aircraft models. Short-term peak loads of around 10 A are possible.

The controller receives the control signal from a radio receiver or microcontroller output and converts it into motor current. The operating voltage must be between two and three LiPo cells; undervoltage or overvoltage is reliably detected and automatically stops the motor. The integrated BEC additionally supplies the radio receiver with regulated 5 V at up to 2 A, eliminating the need for a separate receiver battery.

The controller is used in remote-controlled aircraft models with brushless propulsion, lightweight racing drones with a takeoff weight of up to 3-4 kg, and smaller custom-built quadcopters. It is also used in high-sea boats with electric propulsion weighing under 500 g and in robotics projects with small motors. The protection functions are programmed using dedicated software or directly via the receiver stick, depending on the controller firmware.

The ESC is soldered to the motor wires and connected to the power battery and radio receiver. An ohmmeter test between the motor connections before operation helps prevent short circuits. Operation using power supplies requires a regulated laboratory power supply with sufficient current capacity; otherwise, the controller will enter protection mode.

Safety information

The power supply must be safely disconnected during programming, as the motor may start unexpectedly. This controller is intended exclusively for model construction, testing, and development purposes and is not suitable for connection to household electrical circuits. Work on or immediately adjacent to electrical installations must be carried out by qualified electricians; if you have questions about safe operation, consult a qualified electrician before commissioning.