变换器

In power converters, unbalances generate undesirable DC ripple and non char ac teristical harmonics in the ac side.

在电力变换器中，不平衡会产生不希望的直流波动以及交流侧无特征的谐波。

If unbalances were very sharp it would be necessary to use three single phase SMES, whose converter s could use either current or voltage source indistinctly.

倘若不平衡非常严重，就必须采用三个单相SME，这些变换器可以是电流源的，也可是电压源的，且是等同的。

With the development of cities construction,the undergrounds and light-rails are build more and more fast,so research on HH DC/DC converter,as the auxiliary power for engine,seems more and more important.

二、随着城市建设的发展，地铁、轻轨的建设越来越快，而作为机车的辅助电源—高压大功率DC／DC变换器的研究显得越来越重要。

A novel hybrid diode-clamp cascade multilevel converter for high power application .

一种适用于高压大功率的新型混合二极管钳位级联多电平变换器。

A novel single-phase hybrid cascade asymmetrical multilevel converter is researched in the thesis based on AMC-SMC.

对于AMC-SMC结构，提出了一种新型单相不对称异构混合级联型多电平变换器。

A two-cell single-phase hybrid cascade asymmetrical multilevel converter is researched in the thesis based on AMC-AMC.

组合式不对称混合级联型多电平变换器拓扑的生成方法可以分为两种；同构组合以及异构组合结构。

Multilevel converter ; cascade ; topology ; module

多电平变换器；级联型；拓扑；模块

Using the state-space average modeling method, a nonlinear affine model of Boost converter working on current conduction mode is set up.

采用状态空间平均建模方法，建立了CCMBoost变换器的非线性仿射模型。

Then, stability boundary is obtained through the critical condition of inductor current conduction mode of the forward converter. The nature of this instability phenomenon is analyzed and considered as border collision bifurcation, and its mechanism is further discussed.

根据Forward变换器电感电流导电模式的临界条件得到了相应的稳定性边界，并对低频不稳定现象的边界碰撞分岔本质进行分析和讨论。

Exchange power supply system including electrical network height power source, kerosene engine power set emergency power supply (long time emergency power supply), integral part's UPS power source; The cocurrent power supply system by the rectifier, the accumulator cell (short time emergency power supply), the direct-current converter as well as the corresponding power distribution cabinet is composed; The good earth and the antimine device, may improve the correspondence quality, guarantees the communication facility and operator's security.

交流供电系统包括电网高低电源、油机发电机组备用电源、重要部门的UPS电源；直流供电系统则由整流器、蓄电池、直流变换器以及相应的配电柜组成；良好的接地和防雷装置，可以提高通信质量，确保通信设备及操作人员的安全。

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