Brushless motor is an electric motor with electronic commutation, and its inner and outer rotors are important components of brushless motor, but their performance characteristics are slightly different.
The inner rotor is generally composed of permanent magnets and electromagnets, which can provide higher torque and efficiency, and has a wider speed range. However, due to its complex structure, maintenance is also difficult.
External rotors are generally composed of electromagnets and coils, which have a simpler structure, are easier to maintain, and have a smaller volume, making them suitable for various limited spaces. Its heat dissipation performance is also superior, improving the reliability and safety of the motor. Compared to the internal rotor, the rotor structure is diverse and has a small moment of inertia. Good sealing performance. But poor heat dissipation and low power density.
If higher efficiency and torque are required, it is recommended to choose an inner rotor. If a smaller volume and simpler structure are required, it is recommended to choose an outer rotor.
Brushless motor drivers use control circuits to control the speed, torque, and position of the motor. Different spatial ratios are controlled by microprocessors or other control circuits to generate signals that regulate motor speed, torque, and position at a certain frequency. Among them, the proportion of external current occupying the analog current is used to simulate the signal and control algorithm control system. When receiving the control circuit, the specific operating principle is to convert it into corresponding current, and then generate a magnetic field through the motor coil to affect the motor speed. When the motor speed changes, the magnetic field of the motor also changes, thereby altering the motor's speed, torque, and position.
Brushless motor drive has good control performance, which can accurately control the speed, torque, and position of the motor, adjust the speed, torque, and position of the motor according to the requirements of the application, and achieve more effective energy utilization.

Editor: ZiYu