摘要
磁场准确定向是利用电动机问接磁场定向控制技术实现转矩和励磁解耦独立控制的关键,影响着整个船舶交流电推进系统的稳态和动态性能。通过时船舶电推进电动机矢量控制过程中的磁场定向方式进行演绎,以观测转子q轴磁链为模型,分析转子磁链大小、位置,并利用MRAS理论通过自适应调节实现转子磁场定向实时校正。在实际应用中证明了理论的正确性和磁场准确定向校正策略的有效性。
Accurate flux orientation is the key to achieve decoupling and independent con- trol for torque and excitation using indirect field oriented control technology of electric motor, which has an influence on static and dynamic performance of the whole ship＇s AC propulsion system. In this paper, the mode of flux orientation in ship＇s propulsion motor vector control process is deducted. Based on the rotor q-axis flux model, we analysis the magnitude and loca- tion of the rotor flux, and by using the MRAS theory and adaptively adjusting to realize the real-time correction of rotor field oriented Experimental results verify that theoretical analysis is correct and correction strategy for accurate field orientation is effective.
