The application of brushless permanent magnet motors in medical devices such as oxygen concentrators, ventilators, and centrifuges has brought about noise reduction and energy savings. Firstly， by adopting FOC (Field-Oriented Control) high-precision sensorless vector control technology, drive current harmonics are reduced by 70% compared to traditional square wave control, significantly minimizing torque pulsation. Combined with the fifth-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 instance, in applications like ventilators and oxygen concentrators, this technology meets the quiet operation requirements of ICU wards and home sleep environments. With a high-frequency multi-polarization design, the motor size can be reduced by 30% for the same power output, making it suitable for portable medical and oxygen concentrator devices.