电压

The critical voltage is the critical state of voltage stability and voltage instability.

临界电压是电压稳定与电压失稳的临界状态。

According to this theory, the origin of return voltage in oil-paper insulation system is analyzed. Then two equivalent extended Debye models, a simplified one as well as a complicated one, are established. Based on the dielectric polarization theories, the parameters in the Debye models are analyzed, and its influence to the curve of return voltage are also discussed.

本文首先从极化过程的基本原理出发，给出了回复电压法的理论基础，并由此分析油浸式电力变压器出现回复电压的原因；然后建立了两种等效扩展德拜模型，结合介质极化理论分析了模型中电路参数的意义，并讨论了各参数变化对回复电压曲线的影响。

SUPPLY VOLTAGE,+VS to CVS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder-10s TEMPERATURE, junction1 TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case

0第0页，本页显示记录0-0，共0条记录分0页显示电源电压+比CVS的输出电流，在SOA的耗散功率，内部输入电压，差分输入电压，共模温度，焊针- 10温度，junction1温度范围存储操作温度范围，案件

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

Based on the analysis of operation mechanism and development of the charge pump,as well as the factors limiting its efficiency and speed,a new method using triple-well structure and charge transfer switches is suggested to eliminate threshold voltage drop and body effect.The clock driving circuit is specially optimized to lower output resistance,and speed up the response.

在分析电压泵工作原理和结构演变并指出当前实现方法在驱动和响应上的制约因素的基础上，结合目前先进Flash Memory工作电压和工作要求，提出了结合三阱工艺和CTS方法以消除体效应和阈值电压降从而提高性能的四相位电荷泵设计方法，专门对时钟驱动进行的优化，提高了响应速度。

The voltage drops of anode,cathode,the voltage between two poles and the voltage drops of generatrix of 80kA pre-baking anode electrobath were tested in Aluminium Electrolysing Works of Shandong Aluminium Industry Co.,Ltd.

对山铝电解铝厂的80kA预焙阳极电解槽的阳极压降、阴极压降、极间电压及母线压降进行测试，并根据测试数据进行电压平衡计算，认为电压分配比较合理，阳极压降偏高。

Inspection, the instrument can be used to measure the electromagnetic coil voltage, to see whether it has reached the rated voltage, if the voltage is too low and should be further examination of the control circuit power supply and associated trip switch circuit.

检查时，可用仪表测量电磁线圈的电压，看是否达到了额定电压，如果电压过低，应进一步检查控制电路中的电源和相关联的行程开关电路。

This high voltage electrostatic precipitation controller has 7 channels of analog input,2 channels of analog output, 12 digital inputs and 16 digital outputs. The analog input includes primary current, secondary current, primary voltage, secondary voltage, etc. Controller uses MAX 187 as the A/D converter, which ensure the sampling speed and the conversion precision in the same time. The processor unit is RCM2250 module. Rabit 2000 processor, a 128K SRAM and a 256K Flash Rom are integrated in RCM2250, which improves the performance of pricipitation controller. MAX504 is used to produce the 4~20mA current output.

模拟量输入采集的信号有升压变压器一次电流、一次电压、二次电流、二次电压等，采用12位逐次比较式A/D转换器MAX187，兼顾采样速率和转换精度；中央处理单元采用以8位嵌入式处理器Rabbit2000为基础的RCM2250模块，外扩128KSRAM和256K Flash ROM，内部资源丰富，提高了控制器的整体性能；模拟量输出采用内带基准源的10位电压输出数模转换器MAX504，实现了标准4～20mA电流信号输出；控制器通过控制算法在相应开关量点上输出可控硅的触发脉冲。

The output ripple voltage of the PWM converter is±8 mV with the emblematical condition: 1.5V input voltage, 3.3V output voltage, 100mA loading current, 1MHz working frequency. It means that the whole system has high stability according with the design request.

在输入电压1.5 V，输出电压3.3 V，负载电流100 mA，工作频率1 MHz的典型条件下，对该转换器进行整体仿真，得到输出纹波电压范围仅为±8 mV，说明电路具有高稳定性，符合设计要求。

The relation between the load equivalent capacitance and the load voltage amplitude ...

根据外加电压在负载上产生的平均电流推导出负载等效电容与外加电压幅值的关系，外加电压的幅值或频率越高，放电过程的功耗越大。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。