基于有源阻尼注入的单逆变器多电机系统动态转矩平衡方法

Dynamic Torque Balance Method of Single Inverter Multiple Motor System Based on Active Damping Injection

针对单逆变器多电机(SIMM)驱动系统动态转矩失衡问题,提出了一种基于有源阻尼注入的SIMM系统动态转矩响应方法。引入权值系数Km建立双永磁同步电机(PMSM)的等效加权数学模型,并基于该模型完成双机驱动系统最大转矩每安培曲线设计。但是,考虑到双机动态状态的不一致性,引入辅助的有源阻尼机制以提高系统动态稳定性。最后,基于双25 k W PMSM调速系统试验平台进行验证与分析,包括:SIMM系统动、稳态特性及运行效率等多项测试。结果表明,所提有源阻尼机制对提升SIMM系统功率动态平衡具有理论意义和现实价值。

In order to overcome the dynamic power imbalance problem of single inverter multiple motor driven system. A dynamic power balance method of two motors based on active damping injection was proposed. First of all, equivalent weighted mathematical model of two motors were set up by introducing weighting coefficient/~. Then to complete the maximum torque per ampere double machine drive system based on this model. However, considering the dynamic state mismatch of two motors, introducing auxiliary active damping mechanism in order to improve the system dynamic stability. Finally, based on double 25 kW permanent magnet synchronous motor speed control system experimental platform for validation and analysis, including： double all-digital fuzzy drive system dynamic and steady state and efficiency index. The results showed that the proposed active damping mechanism for improving the power of dual machine system of dynamic balance of theoretical significance and practical value.