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高电压

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Measurements from voltage sources with high internal resistance are subject to a number of errors, such as loading errors from the voltmeter's input resistance and input bias current, as well as from external shunt resistance and capacitance.

对高源内阻电压源的测量容易产生几种误差,诸如:电压表输入电阻和输入偏置电流以及外部分流电阻和电容引起的负载误差。

While the most important characteristics of the electrometer voltmeter operational amplifier are low input offset current and high input impedance, the most important requirement for the nanovoltmeter input preamplifier is low input noise voltage.

静电计电压表使用的运算放大器,最重要的特性是低输入偏置电流和高输入阻抗。纳伏表输入前置放大器的最重要的要求,则是低输入噪声电压。

To avoid the serious electromagnetic interferer, the analog signals are transformed to frequency pulses which are transferred to the kernel of the system. In the measure of the groove voltage, the method of float-ground is adopted to avoid the high common signal and the range switch circuit is designed to solve the conflict of the wide dynamic range and the high precision. least square Curvefit is adopted to reduce the system error.

铝电解生产现场电磁干扰非常严重,为此我们将需要测量的模拟信号就近转换为频率脉冲后再传送到控制核心;采用浮地接入方式消除槽电压信号中的共模成分;设计了量程自动切换电路以解决槽电压的动态范围宽和测量精度高的矛盾;用最小二乘法进行曲线拟和以降低测量的系统误差。

Voltage-gated Na+ channel 1.8 contributes to the majority of the Na+ current that underlies the depolarizing phase of action potentials. Nav1.8 is mainly distributed intracellularly and its current amplitude can be enhanced by the β3 subunit.

电压门控钠离子通道是可兴奋细胞产生动作电位的基础,Nav1.8是特异性高表达在背根神经节初级感觉小神经元中的一种电压门控钠离子通道,它与疼痛的产生有密切的关系。

The power supply can acquire real time online voltage signal of electric network and input into inverting system; generate synchronous signal and effective value of amplitude signal, then become SPWM pulse by wave generating chip SA4828. High degree sinus and good anti-disturbance performed power supply inverting can be also realized.

该电源可以在线实时采集电网电压送入逆变系统,实时产生同步信号和幅值有效值信号,通过波形产生芯片SA4828实时产生和采样电压同频同步且幅值可调的正弦脉宽调制脉冲,并采用开关线性复合功率变换技术,实现高正弦度和强抗负载扰动性能的电源逆变。

It is possible that three-phase voltage is unbalanced and the neutral point displacement voltage is high.

运行中存在三相电压不平衡、中性点位移电压偏高的现象。

Because it uses non linear control,its output of voltage and current contains a lot of high harmonic .

非接触交流调压器利用晶闸管移相控制可方便地调节输出电压的有效值,由于其采用非线性控制方式,使得输出电压和电流存在大量的高次谐波。

The C-band magnetically insulated transmission line oscillator has teen simulated by the three dimensional PIC code in order to study the influence of non symmetry excitation mechanisms on its output modes. It is found that the non symmetry excitation mechanisms, such as random emitting of cathode electron anti the long rise tunic and low magnitude of input voltage, could product higher order modes and reduce output power.

为理解磁绝缘线振荡器实验中频频出现的模式竞争问题,利用3维全电磁粒子模拟程序对C波段MILO的实验模型进行研究,探索各种非对称激励机制对产生微波模式的影响,结果显示:阴极电子随机发射、电压的慢上升前沿、较低的电压等因素都可导致非对称高阶模式的产生,并使输出微波功率大大降低。

According to the chicking equipment for volt-monitor need to build up a standard clock,in order to achieve the request that the instrument carry on time accurate checking to the volt-monitor,this text introduced principle of the oscular clock chip PCF8583 with I2C bus,put forward to make use of the DS32KHz to provide the high stable frequency signal for PCF8583, thus carried out the project of the standard clock, and the interface design of PCF8583 with MCS51 is presented.

根据电压监测仪校验装置需要建立一个标准时钟,对电压监测统计仪进行时间精度校正的要求,介绍了I2C总线接口时钟芯片PCF8583的基本原理,提出了利用DS32KHz给PCF8583提供高稳定度频率信号,从而实现了标准时钟的方案,并给出了PCF8583与MCS51单片机接口设计。

The test results verify the feasibility and reliability of the measurement method,and indicate a positive voltage dependence of stress variation in the rubber stress cone of a high voltage cable terminal.

研究表明,该实验方案是可行的,数据采集是可靠的;在运行状态下,橡胶应力锥应力的变化和电压有关,电压越高应力锥应力变化越大。

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