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.
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.
概述了利用电容膜降低PWB噪声的方法，可以有效地降低电源-地线层之间的谐振和电源脉动电压。
This paper describes the method of Lowering PWB noise using condenser film, can lower resonance between the power supply layer and the ground layer and power supply ripple voltage effectively.
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.
结果表明，死区效应引起了逆变器输出电压波形畸变，引起了电机电流波形畸变和转矩脉动。
The results indicate that the dead time effect distorts inverter output voltage and current waveform and increases torque ripples of the motor.
本文介绍了一种基于脉动高频电压信号注入法实现面装式永磁同步电机无传感器控制的方法。
A method to implement sensorless control of Surface Mounted PMSM based on fluctuating high frequency voltage signal injection was introduced.
设计电压型PW M变频器时死区时间的设定会造成输出谐波增加、负载电动机转矩脉动，严重时甚至引起电动机震荡。
In the design of voltage PWM inverter, the existence of dead-time will arouse the in-crease of output harmonic, the pulsation of the motor torque, and even the oscillation of the motor.
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.
电渗泵是一种液流驱动泵，具有装置简单、载流无脉动、流量范围大和驱动电压适中等优点。
Electroosmotic pump is a liquid driving apparatus, which has its advantages of simplified equipment, non pulsing flow rate, large flow range and moderate working voltage etc.
脉动：电压或电流作有规则的，短暂的和明显的突然变动。
Pulse: a regular, significant abrupt change of short duration in the level of an electric voltage or current.
整流输出的电压、电流脉动大，需要增大滤波器的体积；
Secondly, the low duty cycle leads to the high voltage and current ripple, and enlarges the filter size.
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.
不对称度的增加将进一步增大电容电压的脉动和负序电流的大小。
Larger system voltage unbalance degree causes larger capacitor voltage pulsation and negative sequence current.
传统直接转矩控制技术采用的六边形磁链电压矢量调制方法，这会引起较大的转矩脉动和谐波干扰。
Classical direct torque control method adopts the technique of 6 polygon flux linkage voltage modulation. It will generate torque pulsation and harmonic interference.
脉动补偿电路及优化的电压环使输出电压纹波显著减小，并改善了电路动态性能。
The ripple of the output voltage is decreased remarkably and the dynamic performances of the circuit are improved obviously due to the pulse compensation circuit and the optimized voltage loop.
在分析一种低脉动输出电压的谐振d C环逆变器原理的基础上，对谐振环的谐振阶段的损耗进行了分析与近似计算。
On the base of the theory of lowly pulsant output resonant DC-link inverter, the loss in the resonant phase of the resonant DC-link is analyzed and almost calculated.
由于采样时刻的电压和磁链误差，可在下一个控制周期内得到补偿，因此转矩和磁链的误差始终很小，二者的脉动很小。
The voltage and flux errors at the sampling instant can then be compensated for in the next control period, so the errors are always kept small, which leads to small fluxes and torque ripple.
仿真结果表明基于模糊调节电压矢量作用时间策略的永磁同步电机直接转矩控制的脉动转矩大大地减小。
Simulation results show that the ripe torque of the PMSM DTC based on the strategy of fuzzy modulating the time of voltage vector is decreased dramatically.
数值实验显示该控制器具有很好的普适性，以及此系统能快速跟踪额定电压范围内的参考电压，转矩脉动能被有效抑制。
It can ensure that the controlled system tracks rapidly the reference voltage within the scope of the given saturation voltage, while torque pulsation can be attenuated effectively.
最后，探讨了旋转、脉动高频电压信号注入法下定子电阻对转子位置估算影响的问题。
Finally, the stator resistance effect of rotor position estimation in high frequency voltage signal injection is investigated.
在单片机控制下，脉动送丝波形与外特性同步调控。在停止送丝阶段，单片机令电源输出电压为峰值，焊丝在此电压下返烧并形成熔滴。
The output waveform of the oscillating wire feed system and the external characteristic are controlled and adjusted by a single-chip microcomputer (SCM) synchronously.
在单片机控制下，脉动送丝波形与外特性同步调控。在停止送丝阶段，单片机令电源输出电压为峰值，焊丝在此电压下返烧并形成熔滴。
The output waveform of the oscillating wire feed system and the external characteristic are controlled and adjusted by a single-chip microcomputer (SCM) synchronously.
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