针对闭环激磁电源性能指标的实际需要，研究了该电源幅值回路系统的鲁棒性问题。
Aimed at the practice requirements of the performance index in the excitation power supply with dosed loop control, the robust problem of magnitude loop in this system is studied.
电源电压变化时，异步电动机主磁通随之变化，与之相应的激磁电感参数将是一个变数。
The main flux of asynchronous motor varies with the power voltage and the para-meter of excited inductance becomes a variable.
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