As an important device for respiratory therapy, oxygen concentrators have undergone many technological innovations since their birth in the 1970s. They have not only played an important role in medical institutions but have also gradually entered families and become a daily auxiliary tool for patients with chronic respiratory diseases. With the popularity of portable oxygen concentrators, stable and efficient power solutions have become a key factor in improving equipment performance.

Power plug standards vary significantly across different regions, reflecting differences in shape, size, voltage, frequency, and grounding methods. These variations are influenced by local voltage standards, historical developments, and safety regulations.

Electromagnetic compatibility (EMC) mainly studies the interference and anti-interference issues of electronic and electrical products. That is, how to make various electronic and electrical devices, equipment or systems work normally without interfering with each other and achieve compatibility.