This paper presents a novel dual-mode wound rotor synchronous machine (DWRSM) for variable speed applications. The proposed machine combines the advantages of both the conventional wound rotor synchronous machine (CWRSM) and the brushless wound rotor synchronous machine (BWRSM). Unlike the existing BWRSM, through the dual-mode operation of the proposed machine, constant torque is achieved in the constant torque region by operating the machine in mode-I, i.e., as a CWRSM, and constant power is achieved in the field weakening region by operating the machine in mode-II, i.e., as a BWRSM. The mode change is performed through an additional thyristor drive circuit. The airgap magnetomotive force (MMF) in both modes is derived analytically. To verify this principle, finite element analysis (FEA) and an experiment on a 1- horsepower prototype machine was performed, and key influential factors were verified. The transients in the stator currents and torque during the mode change was analyzed. The test results validated the correctness of the theory and the FEA results.

中文翻译：

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适用于变速应用的双模式绕线转子同步电机


本文提出了一种用于变速应用的新型双模式绕线转子同步电机（DWRSM）。所提出的电机结合了传统绕线转子同步电机（CWRSM）和无刷绕线转子同步电机（BWRSM）的优点。与现有的 BWRSM 不同，通过所提出的机器的双模式运行，通过在模式 I 下运行机器（即作为 CWRSM）在恒定扭矩区域中实现恒定扭矩，并在弱磁区域中实现恒定功率通过在模式 II 下操作机器，即作为 BWRSM。模式改变是通过附加的晶闸管驱动电路来执行的。两种模式下的气隙磁动势 (MMF) 均通过分析得出。为了验证这一原理，进行了有限元分析（FEA）和1马力样机实验，验证了关键影响因素。分析了模式改变期间定子电流和扭矩的瞬态。测试结果验证了理论和有限元分析结果的正确性。