电压

The fundamental positive component, which is employed to determine the phase angle of the source current reference, is obtained by performing harmonic analysis on the source voltage, while the magnitude of the source current reference is determined from the viewpoint of energy-balance.

该方法通过对电源电压进行谐波分析，得出电压的基波正序分量，由此来确定电源电流参考的相位信息；同时从能量平衡的角度确定电源电流参考信号的幅值信息。

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。

For example, if R4 has a value of 10 kΩ, a trip voltage of 18V would require R3 to have a value of 62 kΩ. When choosing values for R3 and R4 to set the desired trip voltage, ensure that they are large enough that the potential divider will not excessively load the supply.

例如，如果R4值为10k，18V的跳闸电压需要R3阻值为62k.R3 和 R4选择适当的阻值来设置需要的跳闸电压值，确保它们足够大以至于潜在分压器不会过度负荷供应。

We must microcontroller Device get is: 1 at all times be used to measure voltage and current of the A/D converter one under the command and provide the basis for the power transistor Voltage of D/A converter.

我们要从微控制器得到的是：一个在所有时间都用来测量电压和电流的A/D 转换器；一个根据命令为功率三极管提供基准电压的D/A 转换器。

A novel zero-voltage and zero-current resonant pole soft-switching inverter was proposed to achieve zero- voltage and zero-current switching simultaneously when main power devices turn-on and turn-off. Therefore, turn-on capacitive losses could be reduced for devices which the intrinsic capacitor value cannot be neglected. Additionally losses caused by the tail current can also be reduced, when IGBTs are used as main switches.

提出一种新型的零电压零电流谐振极型软开关逆变器，可以在主功率器件开通和关断时，同时实现零电压和零电流，因此对于内部电容不能忽略的器件，可减小容性开通损耗，当绝缘栅双极型晶体管(insulated gate bipolar transistor，IGBT)作为主功率器件时，也可减小拖尾电流引起的损耗。

According to two factors between the observability and the stability in the paper, a practical phasor measurement unit configuration scheme based on weak voltage area surveillance and incomplete observability is proposed.

本文同时考虑系统可观测性和电压稳定性两方面因素，提出了一种基于电压薄弱区域监视的非完全可观测的同步相量测量单元配置方案。

Advanced Integrated Circuits are used in signal process. The prepositive signal processor is placed close to the model rotor. The instrument amplifier, the voltage and current converter/transmitter, the isolation amplifier, the isolation power unit, the current and voltage converter etc.

将先进的集成元器件应用于测试电路的研制中，在国内首次将前置信号处理器放置于模型旋翼附近，并采用仪用放大器，电压/电流转换，隔离放大器，隔离电源，电流/电压转换等措施以实现信号远距离传输下的高信噪比信号测量。

Thus an oil-paper insulation system model is introduced for the return voltage analysis. By testing different aged paper or pressboard, the impact of aging degree to the return voltage may be achieved, and it could be helpful to the aging assessment. Based on the principle of polarization process, the basic theory of return voltage is present.

为此，在研究油浸电力变压器绝缘结构的基础上构建了油纸绝缘系统模型，针对该模型进行了回复电压试验，试图通过改变纸的老化程度来分析此时回复电压的变化规律，以期由此有助于进行老化评估。

For large capacity of inverter, due to the dc bus voltage is higher, ac output generally do not need to boost transformer can achieve 220V, in medium and small volume of inverter, due to the low voltage dc 12V, such as, must design, 24V pressor circuit.

对大容量的逆变器，由于直流母线电压较高，交流输出一般不需要变压器升压即能达到220V，在中、小容量的逆变器中，由于直流电压较低，如12V、24V，就必须设计升压电路。

This voltage must be in phase with the primary voltage.

这一电压必须与原电压相同。

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。