Working principle of brushless reduction motor

Brushless reduction motor refers to a device that combines a DC brushless motor with a reduction mechanism. It has the advantages of low noise, long life, smooth operation, no sparks, high efficiency and high dynamic response, and is widely used in various fields of industrial production.

This motor achieves low-speed and high-torque output through a gear reducer. Different transmission ratios can provide a variety of speeds and torques, which greatly improves the application scope of DC brushless motors in the automation industry.

The composition of the brushless reduction motor includes the integration of the reducer and the brushless motor. This integration is usually called a brushless gear motor or a brushless gear motor, which is usually assembled and supplied as a set by a professional reducer manufacturer. The main advantage of using a brushless reduction motor is to simplify the design and save space.

Brushless reduction motors are widely used in automotive parts, linear drives, personal care, smart kitchen and bathroom, robots, precision instruments, medical equipment, smart homes, industrial equipment, consumer electronics, and standard micro gearboxes.

The operating principle of the brushless DC reduction motor is to place the armature winding on the stator and the permanent magnet on the rotor to achieve brushless commutation. However, without the commutation effect of the brush, relying only on the general DC power supply, each stator winding will generate a fixed magnetic field, which cannot interact with the permanent magnetic field generated by the moving rotor magnet, and thus cannot generate continuous single-direction torque.
Therefore, the brushless DC reduction motor replaces the brushes and commutators of the traditional brushed DC reduction motor through a position detector (with or without a position sensor) and an electronic commutation circuit to achieve electronic commutation instead of mechanical commutation. The position sensor provides the rotor position signal, and the controller controls the electronic commutation circuit to commutate after logical processing, ensuring that the armature magnetic field generated by the stator winding interacts with the permanent magnetic field generated by the rotor magnet to continuously generate torque, thereby ensuring the continuous operation of the reduction motor.
The operation mode of the brushless DC reduction motor varies depending on the winding form of the reduction motor body. In most cases, the stator winding is a three-phase winding.