水下推进无刷直流电机相电流重构同步整流控制

摘要

为了满足水下推进无刷直流电机系统小型化、高效率、高可靠性要求,面向单电流传感器置于电源和桥臂母线电容之间结构的控制器,研究其相电流重构同步整流控制方法.分析了无刷直流电机电动运行换流特性,在此基础上给出了不同导通区间基于母线电流的相电流重构方法,进而实现了相电流闭环同步整流控制.仿真和实验验证了上述方法的有效性.%On the demand of miniaturization,high efficiency and high reliability for underwater brushless DC motor propulsion system,phase current reconstruction synchronous rectification control about the controller with single current sensor between power supply and bridge arm capacitance was researched on. The commutation characteristics of brushless DC motor were analyzed,and then the phase current reconstruction method was given based on DC bus current in different conduction intervals. Furthermore,the synchronous rectification control with phase current closed-loop was realized. Simulation and experiment results verify the method.