纹波

The transformer uses a secondary-side center tap and dual Schottky diode D1 to provide full-wave rectification for reduced output-volt- age ripple.

变压器采用次级中心抽头和双肖特基二极管D1提供全波可降低输出电压纹波年龄整改。

Full-wave topology, so output ripple frequency is twice the transformer frequency.

全波拓扑结构，所以输出纹波频率是变压器频率的两倍。

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。

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。

It switches at a pulse with a duty cycle of 50%,the output voltage is regulated via controlling the on-resistance of the regula...

它工作在占空比为50%的方波信号下，具有很低的输出电压纹波(37mV)。

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%。

With the id￠=0 vector control and the feedforward compensation of cogging, the minimum force ripple and maximum efficiency control of non-sinusoidal BEMF SPM motors can be obtained.

考虑永磁磁链谐波对永磁磁链导数矢量幅值及相位的影响，通过引入d￠q￠轴坐标系，提出一种id￠=0的非正弦波BEMF SPM电机矢量控制新方法，结合齿槽前馈补偿可以实现非正弦BEMF SPM电机的最小推力纹波最大效率控制。

The objective of design optimization for the current loop is to maximize the cross-over frequency. The results show the stability is improved and the capability of suppressing the switching noise is far better than the original. The objective of design optimization for the voltage loop is to minimize the gain of the line ripple voltage.As a result the bandwidth minishes obviously and optimization design excelles in restraining the ripple.

主电路以总体积最小为优化目标，优化结果表明电路的体积减少了0.5%；电流环以开环穿越频率最大为目标，优化结果表明电流环的稳定性能得到了改善，开关噪声抑制能力明显优于优化前的；电压环以线纹波电压增益最小为目标，优化结果表明电压环的带宽明显减小，纹波抑制能力远远优于优化前的。

Input voltage ripple and total RMS input ripple current are reduced by synchronized 180 out-of-phase operation.

输入电压纹波和总RMS输入电流纹波减少180同步进行反相操作。

In particular, it is found that the output ripple voltage of boost and buck DC-DC converters are related to the duty ratio of input pulse.

本文提出了开关DC-DC变换器的线性空间建模法，并将其成功地用于升压型和降压型DC-DC变换器的分析，首次导出了上述两类变换器的输出纹波表达式，特别是输出纹波与控制脉冲占空比之间的关系。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐