查询词典 ripple

This paper discusses the principle of the torque ripple of BLDCM with focuses on the theoretical analysis of the relationships between torque ripple and parameters of windings,motor speed and bus voltage,as well as 3-phase reverse electrodynamic potential during phase converting.

对永磁无刷直流电机的换相转矩脉动的产生机制进行了分析，主要从理论上探讨了换相引起的转矩脉动与电机绕组的参数、换相期间的三相反电动势、电机的运行速度及母线直流电压等之间的关系。

In order to optimize performances of shunt active power filter of harmonic compensation, attenuation ratio for switching ripple, stability and power losses, an improved LCL filter topology was presented based on the analysis of the frequency characteristics of the LCL filter, in which a switching-ripple shunt branch and a series-inductor were adopted to the damping resistor to reduce the power losses dramatically.

为了使并联有源滤波器谐波电流补偿性能、开关纹波衰减率、系统稳定性和功率损耗等方面性能得到系统的折中和优化，提出了一种改进型LCL滤波器拓扑，该结构充分利用了LCL滤波器的频率特性，在阻尼电阻两端引入开关纹波谐振分流支路，同时在阻尼电阻上串联一小电感，有效的减少了阻尼电阻的损耗而不改变系统的静态和动态性能。

During the history of the ripple structure was formed, the dislocation-like, crack and oriented surface crack easily happed in the ripple structure.

另外，大面积涟漪结构在薄膜表面形成过程中，会在PDMS弹性薄膜内强度较弱之分子链结构与缺陷处，产生类差排、裂痕及排向表面裂缝等缺陷。

The ways of parallel resonant DC link and three-level control strategy were used in this power amplifier circuit. Output current ripple of power amplifier can be reduced as three-level power amplifier, all of power switches work on and off under the zero voltage switching or zero current switching, loss of switching and current ripple interference effectively reduced.

该电路在功率放大器三电平控制策略的基础上应用了并联谐振直流环节，保持了三电平功率放大器输出电流纹波小的优点，同时功率器件均工作在零电压或零电流条件下，开关损耗、电流纹波干扰有效地减小。

To bring the charm of Debussy's music, people often think of the piano song "Moonlight" It's a transparent floating slowly down the soft light;"Night in Granada," which is slightly lost in the guitar and pizzicato sound of distant ring sound board decorated by the Spanish style;"water reflection" in the reverse position to carry out the chords to the music mode constitutes a symbol of water ripple, ripple the surface, the dynamics of continuous proliferation; symphonic sketch "spray games" are short motive , the phrase cheerful, bright colors and sound, the playing of the background chatter String outlined noisy waves, wave jumping, laughing water, sunlight flashing screen play.

提起德彪西音乐的魅力，人们常常会想起钢琴曲《月光》那缓缓向下漂浮的透明的柔和光芒；《格拉纳达之夜》中稍现即逝的吉他拨奏与远方响起的响板声所点缀的西班牙情调；《水中倒影》中反向进行的和弦对位构成的音乐模式象征水波荡漾、涟漪泛起，不断扩散的动态；交响素描《浪花游戏》则以短小动机、欢快的乐句，色彩明朗的和声，弦乐颤奏的背景勾勒出波涛喧闹、浪花跳跃、水珠欢笑、阳光闪烁的嬉戏画面。

On the water of life, you might activize a lot of ripple, but the ripple can break others' quietude.

在生命的水面上，你也许能激起许多波纹，而你所激起的波纹也会打破别人的平静。

The torque ripple in direct torque control system of permanent magnet synchronous motor is analyzed. To decrease the torque ripple in PMSM DTC, a PMSM DTC system based on the strategy of modulating the time of voltage vector is proposed .

讨论了永磁同步电机直接转矩控制转矩脉动问题，针对永磁同步电机直接转矩控制存在较大脉动转矩的缺点，提出了一种模糊调节电压矢量作用时间的永磁同步电机直接转矩控制策略。

For spectral analysis of high-voltage power supply (for example, photomultiplier tube power supply), low ripple is especially important, the indicator will directly affect the accuracy of measurement, the low ripple, the production of micro-East cultural pressure high voltage power supply, the ripple can be control 0.005%.

用于光谱分析的高压电源，低纹波尤其重要，该指标会直接影响分析测量的精度，就低纹波而言，东文高压生产的微型高压电源，纹波可控制在0.005%。

The torque ripple in SRM are relatively higher compared to induction machines. In this paper, based on the experimental data of static torque characteristic, a fuzzy-neural network is applied to learning it's inverse model off line, then according to the predefined torque distribute function, optimal current profile is real-time gained by the FNN on line, which results in a linear, decoupled, low ripple control of torque. The performances of the proposed method is demonstrated by computer simulation results.

与传统交、直流电机相比，SRM的一个最突出的缺点是其驱动系统转矩脉动比较严重，为此，论文提出了一种基于模糊神经网络转矩逆模型的SRM转矩控制方案，并设计了SRM滑模电流控制器，理论分析和仿真结果表明，基于滑模电流控制器的SRM电动机转矩逆模型控制策略能够有效的解耦、补偿和抵消SRM非线性转矩脉动特性，有效的控制SRM相转矩按期望相转矩变化，从而实现了SRM高性能、低脉动转矩控制。

This was back in the days when Apple Ripple wine, at $1.25 a bottle, was all the rage --- you remember, right?

这些发生在Apple Ripple酒，$1.25 一瓶的，还在完全盛行的那些日子——你记得，是吗？

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。