7年的使用实践表明，直流脉动电压频率调制技术对抑制声谐振现象十分有效。
The7years 'applicable practices indicate that the frequency modulation technology with dc bus voltage ripples is very effective to suppress acoustic resonances.
另外，还对滤波器的结构和参数对输出直流电压脉动和发电机相电流波形的影响及相电流谐波进行了仿真分析。
In addition, the thesis analyzes the influence of the filter structure and parameters on the output DC voltage ripple and the shape of phase currents, as well as harmonics of phase currents.
的直流电压的脉动或纹波可以除去用适当的过滤器。
The pulsations or ripple of the DC voltage can be remove with the proper filter.
本文详细分析了在异步调制下，直流电压的二次脉动对逆变器输出电流以及电机转矩的影响。
This paper analyses the influence of the rippled DC voltage to the output voltage of the inverter and the motors.
同时，设计了用于牵引逆变器控制的二次数字陷波器以及低通滤波器滤除直流电压信号的二次脉动。
Simultaneously, the second order notch filter and low-pass filter are designed to filter the second order rippled DC voltage signal.
交流发电机输出的直流电动势会有较大的脉动电压。
The DC electromotive force output by AC generator can have quite big pulsating voltage.
交流发电机输出的直流电动势会有较大的脉动电压。
The DC electromotive force output by AC generator can have quite big pulsating voltage.
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