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着重研究了恒速情况下交流励磁系统的电流线性放大器特性的实现问题。作者采用了ａｂｃ坐标系统下的凸极同步发电机的数学模型，对交流励磁机带桥式整流电路进行了精确的计算机仿真分析。结果表明，在恒速运行时，电流线性放大器特性的好坏主要取决于电机的电抗负载因素，以及直轴同步电抗大小。通过合理选择电机参数，交流励磁机的电流线性放大器特性可基本得到实现。这对改善电机性能，减轻调压器负担，提高调压精度等有重大意义。
This paper focuses on the realization of the current linear amplifier characteristics of AC excitation system under constant speed. The author adopts the mathematical model of salient pole synchronous generator under the abc coordinate system, and carries on the accurate computer simulation analysis of the bridge rectifier with AC exciter. The results show that the performance of the current linear amplifier depends on the reactive load factor of the motor and the size of the direct-axis synchronous reactance at constant speed. By reasonably selecting the motor parameters, the current linear amplifier characteristics of the AC exciter can be basically achieved. This is of great significance to improve the motor performance, reduce the burden on the regulator, improve the pressure regulator accuracy.