High-end medium-sized servo brushless motor applications

In the field of high-end medium-sized servos, the selection of the core power unit directly determines the response speed, control accuracy and service life of the servo. The coreless brushless motor with a diameter of 17mm and a length of 25mm has become the preferred power solution for high-end medium-sized servos due to its balanced size adaptability, excellent performance parameters and stable operation performance. It is widely used in key scenarios such as aircraft model main wing control, medium-sized robot joint drive, and professional gimbal stabilization systems, providing core support for the precise control of equipment.

The performance advantages of this 1725 coreless brushless motor precisely match the core requirements of high-end medium-sized servos. In terms of power performance, its rated speed can reach 28000-35000rpm, and the mechanical time constant is less than 8ms. Combined with the reasonable reduction ratio of the servo gearbox, the servo can achieve a 60° steering speed of 0.08-0.1s, far exceeding the response efficiency of traditional brushed motors, and can quickly respond to attitude adjustment needs in dynamic control. In terms of torque output, the motor's rated torque can reach 5-7mNm, and the peak stall torque exceeds 45mNm. The converted overall servo torque can reach 35-45kg·cm, which can stably bear the load pressure of medium-sized equipment. Meanwhile, the power density exceeds 90W/kg, achieving efficient power output in a limited space.

In terms of operational stability and service life, the brushless electronic commutation design eliminates brush wear at the source, extending the motor’s service life to over 10,000 hours—more than three times that of traditional brushed motors—greatly reducing the maintenance frequency and operating costs of high-end medium-sized servos. Meanwhile, the coreless, iron-free structure reduces eddy current losses, with motor efficiency reaching over 92%. Even under prolonged high-load conditions, heat generation remains low, preventing performance degradation caused by overheating. In addition, the motor operates at a noise level below 45dB with low electromagnetic interference, making it well-suited for demanding applications such as gimbal stabilization systems that require quiet and anti-interference performance.

When applied to high-end medium-sized servos, the core benefits are reflected in three dimensions. First, a leap in control precision: the motor’s low moment of inertia works seamlessly with the three-loop closed-loop control system formed by the servo’s magnetic encoder and MCU, achieving a positioning accuracy of ±0.05°, enabling precise tasks such as fine attitude adjustment of aircraft models and accurate alignment of robot joints. Second, enhanced dynamic load adaptability: under complex working conditions, the motor quickly responds to load changes and maintains stable torque output through adaptive current regulation, avoiding jitter or loss of synchronization in the servo. Third, improved environmental adaptability: combined with the servo’s sealed design, the motor operates stably in a wide temperature range from -20°C to 60°C, meeting the requirements of diverse applications such as outdoor aircraft models and industrial robots.