부산대학교 도서관

Considering the requirements of the wireless electromagnetic wave MWD system for reliability, stability and purity of the external power supply, as well as the system's demand for multiple power supply inputs, this paper proposed research and design of a multi-output flameproof and intrinsically safe linear power supply. The circuit design adopted a high-efficiency isolation transformer, a highly integrated low-dropout output current and a linear voltage regulator chip with adjustable output voltage to form linear power supply circuit with high stability, big current, and low ripple. The test results show that the linear power supply circuit has the good characteristics of high reliability, high stability, low ripple noise, and meets the actual use requirements of the wireless electromagnetic wave MWD system.