Low voltage DC brushless servo motor controller

Low voltage DC brushless servo motor controllerController introduction: Input voltage 0-48V; Motor power: 0-25W; Speed regulation mode: potentiometer control or PWM pulse width contr

  • Model: Low voltage DC brushless servo motor controller

Low voltage DC brushless servo motor controller

Controller introduction:

       Input voltage 0-48V;

       Motor power: 0-25W;

       Speed regulation mode: potentiometer control or PWM pulse width control;

       Function: can adjust the speed and switch the motor forward and reverse;


Introduction to Low Voltage Brushless Permanent Magnet Brushless DC Motor (BLDC) Motor

Permanent magnet AC motors, permanent magnet synchronous motors, etc. have created confusion because brushless DC motors do not directly operate a DC voltage source. However, the basic operating principle is similar to that of a DC motor.


Brushless DC motors include:

Stator with permanent magnets and rotor winding

Basically a BLDC motor, DC motor facing out

Brushes and commutators have been eliminated, windings are connected to electronic control

The electronic control system replaces the function of the commutator and excites the correct winding

Winding is energized and rotates around the stator

The stator winding is energized causing the rotor magnet, switch and rotor to align with the stator


The main features of BLDC motors:

Is there any spark

Easy to clean, faster, more effective, less noise, and more reliable

Heat generated by the stator: easy to disassemble and maintain

The rotor has permanent magnets and coils, so the inertia is small and it is easier to start/stop

Smooth acceleration or constant torque with linear torque/current relationship

Higher torque ripple due to lack of information between sectors

Low cost manufacturing

Simple, low-cost design, fixed speed application

Clean, fast and efficient

Speed up the appropriate power frequency (50 or 60 Hz)

Complex control of speed and torque

Need electronic control


BLDC motor control


Typical torque, speed, position and/or direction

Input can be analog voltage, potentiometer, switch or digital communication

BLDC motor control: 6-step #3-phase PWM of basic I/O

Comparison of speed sensing sensor control, overcurrent detection

Capture/compare/PWM or input capture speed sensing


Hall effect sensor, photoelectric encoder or back electromotive force voltage

BLDC motor design flow chart