Parallel AC/DC Converter Modulation for Light-Load Efficiency

The patent introduces a current sharing controller as an intermediary device that actively manages the parallel-connected non-isolated converters. This controller monitors and regulates the output currents of each converter module, preventing circulating currents while maintaining the efficiency benefits of parallel non-isolated configuration. The controller acts as a mediator that coordinates the operation of multiple converters without requiring isolated transformer connections.

The patent dynamically changes the operating parameters of the converter system based on load conditions. At light power loads, the system activates only the necessary number of converter modules and adjusts their operating points to maintain high efficiency. The controller modifies duty cycles, switching frequencies, and module activation states according to real-time load requirements, enabling the system to maintain both reliability through redundancy and efficiency through adaptive parameter adjustment.

The patent implements dynamic adaptation of the converter system configuration based on load power levels. The controller dynamically adjusts the number of active converter modules, their connection topology, and operating parameters according to real-time load conditions. At light loads, fewer modules are activated and the system operates in a simplified configuration to minimize fixed power losses. As load increases, more modules are engaged to maintain efficiency. This dynamic reconfiguration allows the system to overcome the fixed power consumption of control circuits and capacitors that would otherwise dominate at light loads.