查询词典 constant voltage

This method uses the generator model of constant transient voltage and the saliency of generator is included.

本文提出了一种基于特殊二阶微分方程数值积分的电力系统动态安全评价方法。

English: Superior Power products, in addition to within the whole framework of an international universal AC input , a variety of constant-current output, up to 95% efficiency 、 small size , with a short-circuit / over load / over voltage / over temperature protection and so on, also has a built-in active PFC function. This series of products are more efficient, longer life, and energy-saving more pronounced.

公司简介：：久嘉电源系列产品，除具有国际通用全范围内交流输入，多种恒流大电流输出，效率高达95%、体积小，带短路/过负载/过电压/过温度保护等特点外，还具有内置主动式 PFC 功能，该系列产品效率更高、寿命更长、节能更明显。

An algorithm based on operation times (T_0) of zero voltage space vector is presented. The d-axis current can be derived from the PI controller, whose inputs are T_0 and one constant T_0~*.

与普通弱磁方法相比，该方法有效地避免了电机参数变化对控制精度的影响，在加快动态响应速度的同时，降低定子电流的幅值。

An algorithm based on operation times (T_0) of zero voltage space vector is presented. The d-axis current can be derived from the PI controll er, whose inputs are T_0 and one constant T_0*.

与普通弱磁方法相比，该方法有效地避免了电机参数变化对控制精度的影响，在加快动态响应速度的同时，降低定子电流的幅值。

A phase-shifted controlling PWM DC/DC full bridge converter with softswitching is proposed and used to realize a constant current power of20A(5～48V).This full bridge converter utilizes the transformer leakageinductance(or the resonant inductance in series with transformersprimary)and the autoecious capacitance of MOSFET to achieveZVS(Zero-Voltage-Switching),as a result it can decrease the switchingwaste,increase the switching frequency,and diminish the power bulk.

本文使用一种通过移相控制进行脉宽调制的软开关全桥变换器来实现20A(5～48V)恒流源，这种全桥变换器利用变压器的漏感、原边串联谐振电感和功率管的寄生电容来实现开关管的零电压开通，降低了开关损耗，提高了开关频率，减小了电源体积。

The relatively constant values of open circuit voltage suggest the electrolyte layer withstands thermal shock due to high thermal conductivity and excellent ductibility of the metal substrate.

相对恒定的开路电压显示，电解质层经受住了热冲击，此受益于金属支撑体良好的导热性和延展性。

In this paper, the generator model of constant transient voltage and the invariableness impedance model was used, and the saliency of generator is included; through the analysis of the characteristic of the network equation calculation in the transient stability analysis, a new node ordering algorithm is proposed. Better initial value can accelerate the convergence rate of the networking equations, reduce the number of iterations, thus to cut down the amount of calculating time.

本文首先建立了适合于暂态稳定分析的简单模型，其中发电机采用E_q恒定模型，考虑了发电机的暂态凸极效应，负荷采用恒定阻抗模型；研究了电力系统的暂态稳定分析方法，指出目前数值积分暂态稳定计算方法中存在的不足，主要是网络方程的求解速度过慢；分析了暂态稳定计算中网络方程的特点，将稀疏技术应用于网络方程的求解，提出了一种新的节点编号方法——最小度最小有源节点道路集算法，减少了网络方程的计算量；在进行交替迭代求解时，将预测算法应用于每一积分步网络方程功角和电压的初值估计当中，应用自回归算法和广义延拓算法，期望给出一个更有效的电压和功角初值方案，来加快方程的收敛过程，减少方程迭代的次数，以提高计算速度。

SEPIC (Single-Ended Primary Inductance Converter) is used from non-isolation DC-DC converter and applied it to the Stand-alone solar power charge controller. SEPIC integrates digital charge controller design, mix the constant current/voltage charge and maximum power point tracking in order to promote the efficiency of converter to whole system.

中文摘要本论文利用非隔离式DC-DC电力转换器中的SEPIC(Single-Ended Primary Inductance Converter)，将其应用在独立型太阳能充电控制器上，结合数位化充电控制器设计、混合定电流定电压及最大功率追踪控制，进而提升整体系统之电力转换效率。

Deltran SuperSmart Battery Tender Plus 12-Volt 1.25 AMP Battery Charger Constantly monitors the battery without the damaging effects of trickle chargers- a trickle charger will eventually boil dry or overcharge a battery Battery Tender Plus' voltage output compensates for temperature changes- providing additional protection Initial charge brings battery to full charge at approximately 14.2V After full charge is reached- converts to float charger and monitors battery at 13.2V Although a constant charge is being applied to the battery- there is little or no current (approx. 10mA) Periodic maintenance is recommended- but Battery Tender can monitor a battery for years without the fear of boiling or destroying the battery Optional pouch for safe and easy storage or transportation 12V Battery Tender Plus has fused quick-disconnect rings with a weather cover Photo's are for reference only.

Deltran SuperSmart电池投标加12伏直流电1.25腺苷电池充电器不断监测电池的破坏性影响涓流充电器一个涓流充电器，最终将沸腾干燥或过高的电池电池投标加'输出电压补偿温度变化提供额外的保护初始充电电池将全面负责在大约14.2V完全充电后达成，转换为浮动充电器和电池监测13.2V虽然恒电荷正适用于电池很少或没有电流定期维修建议，但电池投标可以监测电池多年而无需担心沸腾或破坏电池的任择邮袋的安全和方便储存或运输12V的电池投标融合加了快速环断开与天气覆盖了图片是供参考仅仅。

However, in electric field computation, the BEM has not much unfould and most of them are limited in the conventional BEM. In the flow field computation, although some achievements have been gained in solving the constant and uncompressible fluid flow by using BEM, but to the inconstant, compressible, nonlinear, transonic flow, such as the flow in the arc quenching chamber in SF6 high voltage circuit breaker, no any report has been published up to now for the reason that the basic solution of this kind of flow has not been found.

目前，在电场计算领域所开展的工作相对较少，而且仅限于传统边界元方法的应用；在计算流体力学领域，近年来虽然一些学者应用边界元法，在解决定常、不可压缩等问题进行了相当深入的研究，获得了若干研究成果，但是对于像SF_6高压断路器灭弧室中存在的非定常、可压缩、非线性、跨音速、具有复杂而且变边界的气流场由于至今尚未找到基本解，而未见研究工作的报道。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。