This drive is a threephase brushless BLDC controller with a Hallfree control board designed for compact, power operation. It powers up and runs without external signals, and offers flexible speed control through builtin interfaces. Key benefits Standalone operation: powered and ready to run without external triggers; continuous speed control is available via a builtin potentiometer. Compact power solution: a threephase brushless controller with a wide voltage range of 626V in a small form factor. Reliable control board: Hallfree control board provides stable threephase brushless motor control. Flexible control options: Onebutton model: 100 speed levels accessible by a single button, with acceleration and deceleration, a delay band, and a memory function to remember the last speed setting. Potentiometer regulator model: supports 04.5V analog signals for stepless speed regulation via an external analog input. Broad compatibility: suitable for threephase brushless motors using the Hallfree control approach. Specifications at a glance Type: threephase brushless BLDC controller with Hallfree control board Voltage range: 626V Control options: Builtin potentiometer for continuous speed control Onebutton model with 100 discrete levels, acceleration/deceleration, delay band, and speed memory Potentiometer regulator model supporting 04.5V analog input with stepless speed regulation Form factor: small volume, compact size Performance: power within a compact package 23 use scenarios Hobby robotics projects: use the standalone potentiometer control for simple, quickspeed adjustments without additional controllers, or switch to the onebutton model for rapid, repeatable speed changes with memory. Small automation tasks: drive conveyors, gates, or door mechanisms where a compact, power BLDC drive is beneficial, benefiting from ramped acceleration/deceleration and lastspeed memory. Model vehicles and RC applications: implement precise speed control in small electric vehicles or robotic platforms, using the 04.5V analog input for integrated control from other systems or sensors, or employ the onebutton mode for easy field adjustments. Notes Both the onebutton and potentiometer regulator variants provide convenient, simplified interfaces for speed control. The unit emphasizes function, compatibility with threephase brushless motors, and a compact, power design without adding extraneous features.