A digital current sharing control method leveraging a CAN bus is developed to inhibit the fluctuating current distributions of parallel converters in high-output oxidation power systems. When compared to conventional current sharing strategies, the proposed design significantly reduces circuit complexity without resorting to an analog current sharing bus, and is extremely robust in maintaining system functionality against one or multiple module failures. The digital control design also features anti-interference among high-power switching converters. In addition to detailing the operation principles and mathematical deductions of the state-space average model, the design of a current sharing controller and a current sharing scheme based on a CAN bus are presented to analyze the steady-state operation of parallel converters and dynamic-state operation. Based on these observations, a proof-of-concept prototype was developed that offers a maximum output power of nearly 400 kW with a current sharing error (CSE) below 2.1%. In addition, this system features outstanding anti-interference capability in intense electromagnetic fields.

开发了一种利用CAN总线的数字电流共享控制方法，以抑制高输出氧化电源系统中并行转换器的波动电流分布。与传统的电流共享策略相比，所提出的设计无需使用模拟电流共享总线即可显着降低电路复杂度，并且在保持系统功能以防止一个或多个模块故障方面极为强大。数字控制设计还具有大功率开关转换器之间的抗干扰性。除了详细说明状态空间平均模型的操作原理和数学推论之外，提出了一种基于CAN总线的均流控制器设计和均流方案，以分析并联转换器的稳态工作和动态状态。基于这些观察，开发了概念验证原型，该原型可提供近400 kW的最大输出功率，且均流误差（CSE）低于2.1％。此外，该系统在强电磁场中具有出色的抗干扰能力。