Sensorless servo motor based on High-Frequency Injection (HFI).​ This motor has no encoder or Hall elements. Its built-in chip estimates rotor position via HFI, enabling pulse+direction closed-loop control. Featuring low cost, compact size, and excellent zero/low-speed performance, it is ideal for precision devices such as medical pumps.

Leveraging its 42 mm form factor, built-in driver, approximately 70 W output, high efficiency, and low noise, the Nidec 24H SP43-40—when coupled with a gearbox and lead screw—effectively meets the thrust, speed, precision, and volumetric requirements of CT high-pressure injectors. It is particularly well-suited for new product development of dual-channel compact CT high-pressure injectors and the retrofit of conventional equipment.

With the maturation of Sensorless Positionable Brushless DC (BLDC) motors, peristaltic pumps have gained an extremely cost-effective upgrade solution.

The sensorless positionable BLDC motor solution has limited accuracy, but as long as it meets the application requirements, it is a highly cost-effective choice.

Brushless DC servo motors are widely used in numerous fields due to their excellent balance between performance and cost.