The application of brushless permanent magnet motors in medical fields such as oxygen concentrators, ventilators, and centrifuges delivers low noise and energy efficiency. Firstly, it adopts FOC (Field-Oriented Control) high-precision sensorless vector control technology, which reduces the driving current harmonic by 70% compared with traditional square wave control and significantly lowers torque ripple. Combined with the 5th-generation motor control technology and a fundamental frequency of 8000 Hz, the current waveform during high-speed motor operation closely approximates an ideal sine wave, effectively eliminating mechanical vibration and noise. For example, in application scenarios like ventilators and oxygen concentrators, this technology can meet the low-noise requirements of environments such as ICU wards and home sleep settings. Relying on the high-frequency multi-polarization design, the motor volume can be reduced by 30% under the same power, making it suitable for portable medical equipment and oxygen concentrators.