The control system functions to keep speed of the machines substantially constant and the voltage within prescribed limits, even the load may change.

控制系统的功能是在负载随时变化的工况下，确保机组转速恒定，并使电压输出控制在要求范围之内。

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We design a suit of aviation AC excitation generator system, it insures the output voltage is constant frequency and constant voltage.

我们设计了一套航空用交流励磁发电机系统，以保证输出电压恒频恒压。

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One of the important basic qualities of a power system is the voltage of the supply to its customers, with a constant voltage at all time being ideal.

电力系统的重要质量指标之一就是供给用户的电压，理想的是，在任何时候电压稳定不变。

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