Due to need for the development of portable motor meter assembly checking box, a kind of frequency signal generator is designed, detailed design principle and idea are discussed.

针对“便携式汽车仪表总成校验箱”系统的开发需要，设计了一种用于汽车电子转速表、里程表校验的频率信号发生器，论述了电路的设计原理和设计思想。

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The effect of nonlinear load and the filtering action of motor-generator is analyzed, and an effective analytic tools and test reference for ship medium frequency power system is supplied.

验证了非线性负载对中频电网的影响同时分析了旋转变频机组的滤波作用，为舰用中频电网的分析提供了有效的分析工具和试验参考。

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In addition, the output frequency of a motor generator set shall not vary by more than 5% when operated at rated output voltage and current.

另外，当发电机以额定电压啊，电流运行时，其出力(输出功率)频率允许在上下5%内跳动。

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