HY-PSM adopts three-phase full-bridge SPWM switching inverter topology, different from linear excitation power supplies HY-GT/HY-AE. Max conversion efficiency reaches 94% without massive heat loss of linear circuits, supporting hundred-kilowatt high-power centralized output. Standard frequency band 320~480Hz (400Hz aviation reference), optional extended wide band 45Hz~1kHz, single/three-phase output available. Each phase voltage adjustable independently 0~rated value, inter-phase phase angle continuously adjustable 0~359.99%, accurately simulating 400Hz airborne power supply for military/civil aircraft, marine medium-frequency grid and servo medium-frequency motor operating conditions