查询词典 DC

When compared with TL Buck converter, efficiency of this new converter is higher and the DC voltage blocking capacitor[1] can be smaller, when compared with double frequency Buck converter, voltage stress of the high frequency switches is lower, the output capacitor and inductor is smaller, and the dynamic load characteristic is better.

与三电平Buck变换器相比，复合双频Buck变换器具有较高的效率，而且其"隔直"电容可以取得更小。与双频Buck变换器相比，其具有高频开关电压应力低，输出滤波电感、滤波电容小，动态负载性能好等优点。

The converter combines the advantages of the PWM technique and soft-switching technique, the PWM is effected all over the whole loads range, and soft-switching is effeted only in the switching transition period, the ZVS of leading-leg is achieved by using the energy stored in leakage inductor of the transformer and the output inductor, the ZCS of lagging-leg is achieved by using a blocking DC capacitor, the ZVS and ZCS are achieved for the whole load ranges (5A~250A).

控制电路采用相移控制方式，综合了PWM控制和软开关技术的优点，在大范围内实现PWM控制，而在功率器件换流期间实现软开关换流，其中超前桥臂利用变压器的漏感，实现了零电压开关，滞后桥臂利用隔直电容，实现了零电流开关，并且整个变换电路能在（5A~250A）的范围内实现软开关工作条件，满足弧焊电源负载变化大的特点。

The amount of wire wound on each bobbin determines the DC resistance and other factors, including sound characteristics.

金属丝的数量都影响着直流电的电阻以及其它等等的参数。对拾音器音色特点起了影响。

This paper precisely conducts the special topic research in view of some important technologies of the digitized control module.(1) AC motor control circuit of PAN/TILT is designed ,which speed is controlled by AT89C51 MCU. DC motor control circuit of LENS is designed too.(2) The hardware and software of automatic temperature control is designed, which used in camera protect box without A/D IC. A kind of single wire communication IC is used in the circuit. So, the program is given.(3) A method of video switch without picture shock is discussed in this paper, and 16x8 video switch circuit is designed. AT89C51 can carry out time sequence logical control with the sync signals by request..(4) The module of real-time clock is designed, in which, LCM is used, a kind of three-wire communication IC is used too.

1给出了一种由89C51单片机控制的简单易行的交流云台转动变速控制电路，实现了云台及其电动三可变镜头的控制；(2)给出了无需外加A/D、单线通信的防护罩自动温度控制电路，完成了单片机温度控制软件的设计；(3)提出了"无抖动"视频切换的设计思想，给出了16×8的视频切换电路，利用单片机在视频信号的场消隐期控制切换，从而实现了"无抖动"切换；(4)给出了一种三线接口通信的液晶显示实时时钟电路，完成了程序设计；(5)提出了在视频监控系统数字控制模块中，用CAN总线取代传统的RS-485总线，实现PELCO-P协议传输的方案。

Each set of motor is equipped with DC electromagnetic brake, and its brake lining is capable of automatically trace and adjust the braking clearance so as to ensure its well balanced and reliable brake performance.

每套配备直流电动机电磁制动、制动器衬及其具有自动跟踪和调整刹车间隙，从而确保其良好均衡和制动性能可靠。

The cord from the generator leads first to the circuit board's bridge rectifier, which converts the AC to DC.

从发电机导致第一线的电路板的整流桥，它转换的AC到

These units can be recharged by plugging them into a USB port, household outlet, vehicle DC outlet or by using Brunton's solar panels.

这些单位可充电插入到USB端口，家用电源插座，汽车直流电源，或使用顿的太阳能电池板。

This 4 story building is located in a high trafficked area of North West DC near several landmarks.

该店位于哥伦比亚特区西北部一个交通繁忙的地区，周围有数个纪念碑。

It would be far better for Haiti to switch to solar power, argues Jigar Shah, the bumptious chief executive of the Carbon War Room, a ginger-group in Washington, DC, who formerly ran SunEdison, a solar power company.

碳战工作室的董事长Jigar Shah说到，太阳能发电对海地来说会是个更好的选择。碳战工作室是位于华盛顿的一个活跃的组织，其经营的SunEdison公司是一家太阳能公司。

In this paper, a novel DC coupled feedforward type optical burst mode receiver is presented.

介绍了一种高速光突发模式接收机。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。