LLC resonant converters exhibit superior energy transmission efficiency and more stable output voltage compared to conventional converters. During operation, they achieve zero-voltage switching (ZVS) on the primary-side switch and zero-current switching (ZCS) on the secondary-side rectifier diode, ensuring stable DC voltage output and efficient power transfer. This makes them particularly suitable for industrial machinery power supply systems, such as those used in CNC machine tools, automated production lines, and heavy lifting equipment. These converters provide stable electrical energy for motor drives and high-precision control systems. Additionally, their high efficiency significantly reduces equipment energy consumption, diminishes heat dissipation requirements, and extends service life. In this paper, the working principle of the half-bridge LLC resonant converter is thoroughly analyzed, the resonant parameters are meticulously designed, and the rationality of the parameter design is validated through MATLAB/Simulink simulations. Experimental results demonstrate that the converter exhibits excellent performance, meeting the demands for high efficiency, high stability, and strong anti-interference capability in various mechanical applications.