Brushless DC gear reduction motor is composed of deceleration motor body and driver. It is a typical mechatronic product. Its working principle is as follows:
The stator windings of the deceleration motor are mostly three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the reduction motor. The driver consists of power electronics and integrated circuits. Its function is to receive the start, stop and brake signal of the deceleration motor, control the start, stop and brake of the deceleration motor; Receive signal of position sensor and positive and negative signal, control the disconnection of each power tube of inverter bridge, produce continuous torque; Receive speed instruction and speed feedback signal, control and adjust the speed of Leo durable deceleration motor; Provide protection and display etc.
Because Brushless DC gear reduction motor is controlled automatically, it will not add another starting winding to the rotor like heavy synchronous motor under variable frequency speed regulation, nor will it produce oscillation and out-of-step when the load changes.
The permanent magnet of small and medium brushless DC deceleration motor mainly uses high magnetic energy product of rare earth Ndfeb. Therefore, the volume of rare earth permanent magnet brushless motor is one seat number smaller than that of three-phase asynchronous motor with the same capacity.
In the past 30 years, the research on variable frequency speed regulation of asynchronous motor is to find the method to control the torque of asynchronous motor. Rare earth permanent magnet brushless DC deceleration motor will have advantages in the field of speed regulation due to its characteristics of wide speed regulation, small volume, high efficiency and small steady speed error.
Brushless DC gear reduction motor is also known as DC frequency conversion, because it has the characteristics of DC and brush reduction motor, is also a frequency change device. The international term is BLDC. Brushless DC motor operation efficiency, low torque, speed accuracy is better than any control technology, worthy of industry attention.
