The platform adopts a distributed multi-simulator collaborative architecture: one master simulator simulates the front-end cascaded H-bridge circuit in real time with a 1 μs time step, while three slave simulators accurately simulate the back-end high-frequency DC-DC converters of each phase with an extremely small 100 ns time step. Real-time data interaction between the four simulators through fiber, together with clock synchronization lines ensuring strict synchronization, forms a high-precision, unified virtual controlled plant.

At the communication and interface level, the master simulator connects to a fiber aggregation box through three high-speed fiber links; the aggregation box converts the signals into multiple low-speed fiber links that connect point-to-point with the front-end sub-controllers, transmitting key signals such as sub-module voltages and PWM control; back-end communication interacts directly with the corresponding sub-controllers through the physical I/O of the slave simulators. This design successfully builds a high-precision, highly reliable test environment that fully supports development needs from controller functional verification to system dynamic performance testing.