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脉动
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  ripple
    Study of Reduction of Vibration Noise and Low Torque Ripple for Switched Reluctance Motor
    开关磁阻电机的减振降噪和低转矩脉动研究
短句来源
    Study on Torque Ripple Suppression Technique of Permanent Magnet Brushless DC Motor
    永磁无刷直流电机换相转矩脉动抑制技术研究
短句来源
    The proposed modified SVM-DTC method calculates the torque angle reasonably,reduces the torque ripple obviously and has better performance than those of the conventional SVM-DTC method with constant PI coefficients.
    改进的SVM-DTC方案的转矩角计算合理,转矩响应脉动减少,性能优于常规恒定PI系数的SVM-DTC。
短句来源
    Aiming at the problem of higher torque ripple of switched reluctance motor,the nonlinear dynamic model for a switched reluctance motor(SRM) based on magnetic characteristic is analysed.
    针对开关磁阻电动机SRM(Switched Reluctance Motor)转矩脉动大的问题,基于SRM的磁化特性,分析了SRM的非线性模型。
短句来源
    Analysis of the mathematical model of high torque and Low ripple BLDCM system
    大力矩低脉动无刷直流电动机系统数学模型的分析
短句来源
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  ripples
    The basic DTC has simple structure and is easy to be realized,but it presents large torque and current ripples in low speed areas.
    Basic DTC的控制结构简单,易于实现,但低速时转矩和电流的脉动大。
短句来源
    The Relation Between Torque Ripples and PWM Modes of Brushless DC Motor
    无刷直流电机PWM调制方式与转矩脉动关系研究
短句来源
    Analysis and attenuation on commutation torque ripples of brushless DC motor
    无刷直流电机换向转矩脉动分析与抑制
短句来源
    Analysis of Torque Ripples of Vector-Controlled Permanent Magnet Synchronous Motors
    矢量控制永磁同步电动机的转矩脉动分析
短句来源
    Through the detailed analysis of the commutation torque ripples and the relationship between the DC current and phase current in the commutation interval, two effective methods are proposed to reduce the commutation torque ripples. The two methods are the negative DC current elimination method and the commutation current prediction control method, respectively.
    通过分析换相转矩脉动产生的机理和换相期间直流母线电流、相电流的波形,得到了造成换相转矩脉动的本质原因,并在此基础之上提出了两种抑制换相转矩脉动的方法:通过消除直流母线负电流减小换相转矩脉动和换相电流预测控制抑制换相转矩脉动的方法,并且对这两种方法进行了实验验证。
短句来源
更多       
  ripple minimization
    Research on Torque Ripple Minimization Strategy for Direct Torque Control of Induction Motors
    异步电动机直接转矩控制转矩脉动最小化方法研究
短句来源
    A Torque Ripple Minimization Scheme in Direct Torque Control of Induction Motors
    一种异步电机直接转矩控制技术的转矩脉动最小化方案
短句来源
    Torque Ripple Minimization of Switched Reluctance Motor Based on Adaptive Fuzzy-Neural Networks
    基于自适应模糊神经网络的开关磁阻电机转矩脉动抑制
短句来源
    Torque ripple minimization in direct torque control of induction motors
    直接转矩控制的异步电动机转矩脉动最小化
短句来源
    A Control Strategy Research and Controller Design for Torque Ripple Minimization of Switched Reluctance Motor Drives
    低转矩脉动开关磁阻调速电动机控制策略研究及控制器设计
短句来源
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  “脉动”译为未确定词的双语例句
    Analysis And Calculation of the Polyphase Rectification Circuit (PRC) pulsalion Coeffjcjent
    多相整流电路脉动系数的分析和计算
短句来源
    A Mathematical Model of Converting Station with Twelve Impulse Unit Connection
    十二脉动单元接线方式换流站数学模型
短句来源
    Armature reaction influence on magnetic field of motor in air-gap and optimum commutation position are studied using FE model. Variety of Torque and according to calculate and analysis the results of FE simulation.
    利用有限元模型研究了电枢反应对电机气隙磁场和最佳换向位置的影响,并且结合对有限元仿真结果的计算分析,研究了实验电机电磁转矩及其脉动随电枢电流变化的情况。
短句来源
    The experiments show that the switched reluctance motor drive designed in this paper has the advantage of high efficiency, real-time, good dynamic performance, low noise and less torque tremble.
    实验表明,本文设计的开关磁阻电机调速系统具有高效率、实时性好、动态性能好、噪声低、转距脉动明显减少等优点。
    Parameters Design and Simulation Analysis of a Soft-switched PWM Inverter with Low-ripple Output
    低脉动软开关PWM逆变器的参数设计及分析
短句来源
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  ripple
We deal with the maximum Gibbs ripple of the sampling wavelet series of a discontinuous function f at a point t ∈R, for all possible values of a satisfyingf(t)=αf(t-0)+(1-a)f(t+0).
      
However, a ripple current occurs in the inactive phase due to the diode freewheeling during the non-commutation period in the traditional pulse width modulation (PWM) methods, which aggravates the torque ripples.
      
As a result, the torque ripple is suppressed using the proposed method.
      
Thrust ripple optimization and experiment for a permanent magnet linear synchronous motor
      
Thrust ripple such as end force, slot force and normal force are key factors that affect the properties of permanent magnet linear synchronous motors (PMLSM).
      
更多          
  ripples
For the Shannon wavelet series, we make a complete description of all ripples, for any a in [0,1].
      
However, a ripple current occurs in the inactive phase due to the diode freewheeling during the non-commutation period in the traditional pulse width modulation (PWM) methods, which aggravates the torque ripples.
      
Therefore, the torque and stator flux linkage ripples are high in the direct torque control (DTC) drive of the ESM with a torque and flux linkage hysteresis controller (basic DTC).
      
Thus, vertical vibrations can lead both to the parametric excitation of waves (Faraday ripples) and to the suppression of the Rayleigh-Taylor instability [1-2].
      
The circuit for controlling the switch current regulator maintains the relative value of current ripples in the lamp at a constant level.
      
更多          
  ripple minimization
Development of torque and flux ripple minimization algorithm for direct torque control of induction motor drive
      
An experimental method for ripple minimization in transmission data for industrial X-ray computed tomography imaging system
      
All possible sources of ripple are observable from mechanical states, hence this method has potential for complete ripple minimization.
      


An improved way be select the optimal value of the secondary impulse pressure in the control system of steam turbine is discussed in the paper. A pertinent study and its result obtained from calculation in the computer DJS 131 shows that the relative value method for selection of the optimal value, which was widely adopted by J1M3 and KT3 in the Soviet Union and by some domestic works concerned is not optimum to the actual system, even though it is valid mathematically. In this paper an absolute value method...

An improved way be select the optimal value of the secondary impulse pressure in the control system of steam turbine is discussed in the paper. A pertinent study and its result obtained from calculation in the computer DJS 131 shows that the relative value method for selection of the optimal value, which was widely adopted by J1M3 and KT3 in the Soviet Union and by some domestic works concerned is not optimum to the actual system, even though it is valid mathematically. In this paper an absolute value method for selection of the optimal value is recommended. It is not only valid mathematically, but also optimum to the actual system. If the new method is applied in the control system design, the sensitivity of the pilot value may be increased by about 30% without any extra charges and the dynamic behaviour of the control system will be also improved.

本文讨论了汽轮机调节系统中二次脉动油压最佳值的选择问题。通过分析和DJS-131机的计算指出,苏联以及国内一些有关工厂惯用相对值求最佳值的办法,虽然在数学上是成立的,但在实际系统中并非最佳值。本文提出了用绝对值求最佳值的办法,这不仅在数学上是成立的,而且在实际系统中也是成立的。若在调节系统设计时采用新法进行设计,则不需付出任何额外的代价而使滑阀灵敏度提高约30%,从而改善了调节系统的品质。

A comprehensive comparison is made between the two methods used to locate the

本文对选择汽轮机调节系统二次脉动油压最值佳的两种方法,进行了详细的对比。认为最近提出的A=1/3、P_x=(3P_1+P_4)/4,事实上是不成立的。而原来采用的A=1、P_x=(P_1+P_4)/2是正确的。并进一步从运 动方程式入手,论证了原法的正确性。

The phese-lockcd frequevcy multiplier described in ibis paper is a complex control system which has excellent performance in low frequency wide band operation. Since a sample-hold type discriminator is employed in this loop. the output ripple inherent in ordinary phase discriminator is restrained and the parasitic frequency modulation in frequency-multiplied output is avoided to a great degree. As a result, the time constant of low-pass filter can be kept very small, or even be zero, thus cattsing a shortening...

The phese-lockcd frequevcy multiplier described in ibis paper is a complex control system which has excellent performance in low frequency wide band operation. Since a sample-hold type discriminator is employed in this loop. the output ripple inherent in ordinary phase discriminator is restrained and the parasitic frequency modulation in frequency-multiplied output is avoided to a great degree. As a result, the time constant of low-pass filter can be kept very small, or even be zero, thus cattsing a shortening of the capture time. Also,a specially designed AGC circuit is adopted in this loop that not onlyinsures the system stability, but also gives a good tracking performance. Thedesign principles presented in this paper have been verified experimentally.

本文所分析的是一种作为复合控制系统的锁相倍频器,它在低频宽带运用时具有优良的性能。环路中采用了一种采样一保持型的鉴相器,抑制了普通鉴相器所固有的输出脉动分量,在很大程度上避免了倍频输出中的寄生频率调制现象;同时,低滤通波器的时问常数还可取得很小,甚至完全省去,这样又缩短了捕捉时间。环路中还增设了一种特殊设计的自动增益控制电路,既保证了系统的稳定性,又获得了良好的跟踪性能。文章对所提出的设计原则进行了实验验证。

 
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