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Vector Control of Double Excited Synchronous Machine as Integrated Starter-Alternator

机译：双励磁同步电动机作为起动机-发电机的矢量控制

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The paper proposes a double excited synchronous machine as integrated starter-alternator for future automobiles applications. Particularly, the biaxial excitation synchronous machine (BESM) is proposed for its high efficiency and wide constant power speed range. As the integrated starter-alternator system combines both starter and generator functions in a single electric machine, an alternative vector control strategy for BESM is developed and detailed to allow operation in the two modes at unity power factor operation by setting d-axis current to be zero and q-axis current to be constant and equal to its value that cancel the q-axis flux. In such conditions, the BESM torque can be controlled by the dc-excitation current and the required dc-bus voltage can be regulated within the 42V PowerNet specifications. To overcome the slowness dc-excitation current response, which is due to higher dc-field excitation time constant, and to increase the torque response quickness, the control of the magnetising current is proposed instead of the d-axis current. Implementation and simulation results validate the proposed scheme and provide a practical solution for an integrated starter-alternator.
机译：本文提出了一种双励磁同步电机，作为未来汽车应用中的集成起动/交流发电机。特别地，提出了双轴励磁同步电机（BESM），因为它具有高效率和宽的恒定功率速度范围。由于集成的起动机-交流发电机系统将起动机和发电机功能结合在一台电机中，因此针对BESM的替代矢量控制策略得到了开发和详细设计，通过将d轴电流设置为1，可以在两种模式下以单位功率因数运行零电流和q轴电流应保持恒定并等于其值，从而抵消q轴通量。在这种情况下，可以通过直流励磁电流来控制BESM转矩，并且可以在42V PowerNet规范内调节所需的直流母线电压。为了克服由于较高的直流磁场励磁时间常数而引起的慢速直流励磁电流响应，并提高转矩响应速度，提出了控制励磁电流的方法，而不是d轴电流。实施和仿真结果验证了所提出的方案，并为集成的起动发电机提供了实用的解决方案。

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