第一部分讨论各种谐波问题，如使供电电压畸变，降低功率因数，增加能量损耗，干扰通讯系统等。
The harmonic problems, such as distorting supply voltage, decreasing power factor, increasing energy loss, interfering with communication systems etc. are discussed in the part one.
同时给出了其牵引绕组电压、电流等系统主要参数的计算。
The system interface parameters calculation, such as input voltage and cur-rent for traction windings is also presented.
该装置具有广泛的通用性，可用工业测控系统进行力、位移、温度、电压、电流等各种参数的检测与变换。
It can be widely used in industrial measure and control systems to measure and transform voltage, current and other parameters with high reliability.
其参数是通过在系统扰动过程中的发电机电压、电流和转子角等数据而得到的。
The parameters are calculated from the data of small perturbations of the generator voltage, current and rotor angle during system disturbances.
该系统能够同时模拟频率类、电压类、电流类等多种信号，还能同时检测电子仪表的精度。
The system can be used to analog signals of frequency, voltage, current simultaneously etc. Meanwhile it can be used to detect precision of the meters.
分析了LCLV驱动信号的电压幅值、频率、占空比以及屏幕照度等诸多因素对投影系统对比度特性的影响。
The effects on the contrast of the LCLV projecting system, such as the LCLV driving signal voltage, frequency, duty cycle and the display screen illumination were analyzed.
熔断器选择必须依据其使用条件来进行，主要有系统电压、额定电流、短路容量、保护配合等。
Selection of fuses must be carried out according to their use conditions, mainly they are system voltage, rated current, short circuit capacity, protection suitability etc.
通过对接触电压、等电位联结在低压配电系统中作用的分析，进一步明确等电位联结在设计、施工中的重要性及必要性。
By analyzing the effects of touch voltage and equipotential bonding on low voltage distribution system, makes clear the importance and necessity of equipotential bonding on design and construction.
其中采用的电动进样控制系统，具有控制电压低，控制灵活等特点。
There are characteristics, such as low control voltage, facility and so on, by using electrokinetic injection system.
系统的硬件主要有：ZHJ-1B型电流传感器、自行研制的电阻应变式力传感器、电极间电压测量装置及NI-DAQ 6062E数据采集卡等。
The hardware of the system mainly consists of a ZHJ-1B current sensor, a self-made resistance strain force sensor , the device for measuring electrode voltage and a NI-DAQ 6062E data acquisition card.
仿真结果表明，该方法能有效地维持系统电压水平，同时防止多控制手段间的超调和调节振荡等现象。
The simulation results indicate that the strategy can maintain the system voltage and prevent the over-control and control oscillation among the multi-methods.
分析了激励线圈的尺寸、激励脉冲的频率、占空比和电压等因素对脉冲涡流检测系统的影响，给出了实际检测过程中选择参数的原则。
The influence factors such as the dimension of exciting coil, the frequency, the duty ratio and the voltage of exciting pulse were analysed, the principle of choosing testing parameters was proposed.
得到了系统方程式和有关瞬态响应、稳态响应、单位弧度稳态偏转的线圈电流电压、稳定性、灵敏度等的公式，并探讨了设计中的某些问题。
The general equation is presented and various formulas are derived and plotted and discussed, which described the transient response, sinusoidal response, stability, sensitivity, and etc.
本系统为确保可靠工作和安全运行，设置了软起动、过电压、过电流和过热等保护环节。
To insure reliable operation and safe motion, the soft start, the overvoltage, overcurrent, and overheating protection are installed at the system.
电力系统中常需测量电压、电流、功率因数、有功功率、无功功率和视在功率等参数。
In an electric power system, the following parameters often need measuring: voltage, current, power factor, power, reactive power and apparent power.
保护设备电源系统免受雷击过电压、电网波动、操作过电压、静电放电等造成的损害。
Protection equipment power supply system from lightning over-voltage, power grid fluctuations, operating over voltage, electrostatic discharge, etc.
传统SVPWM控制方式存在死区时间，使系统输出电压能力降低，出现相位偏差、波形畸变等现象。
Aiming at the phenomenon of reduced system output voltage capability, phase deflection and wave aberration of tradition SVPWM dead problem.
当电网电压和频率的变化时，分析了电动机、变压器、控制及保护系统、照明系统、通信导航设备等受电器工作的可靠性。
When the variation of bus-bar voltage and frequency occurs, the reliability of electric motors, transformers, control and protection system is analyzed in this thesis.
在保证系统中无功功率平衡的基础上，辅以有载调压等措施调整电压，才可使电压的偏移保持在允许范围内。
Based on guaranteeing reactive power equilibrium of the system, only the voltage regulation assisted by on - load voltage regulation can make the deviation of voltage keep in allowable scope.
数模转换器、模拟集成滤波器、基准电压源和高驱动能力运放等电路是通信系统中不可缺少的基本电路。
Digital to analog converter, analog integrated filter, bandgap reference and high drive capability operational amplifier are indispensability basic circuit of communication system.
文中着重地介绍了BMS子系统中电池均衡系统及其保护电路的设计方法，同时介绍了电压采集及温度控制等电路。
This article focuses on cell equalization and its protection circuits in the subsystem of BMS, and also circuits of voltage and temperature is recommended.
在考虑负荷波动等随机因素的情况下，运用概率统计方法对电力系统电压稳定问题进行了分析。
With consideration of small random disturbances of power system loads, a probabilistic voltage stability analysis is proposed.
如何准确地确定在电压稳定性等复杂约束条件下的系统输电能力，成为了当今电力系统界所面临的急待解决的研究课题。
How to calculate the power system transmission capability in complicated voltage stability constraint conditions exactly becomes a desirable study problem in the power system nowadays.
然后对DVR进行电压补偿过程中涉及到的对功率管、补偿电压输出以及整个DVR系统等的控制策略进行了探讨和分析。
Provided discussion and analysis for the control of IGBT, output of compensatory voltage and the control strategy of the whole DVR system.
最后设计调试了永磁电机直接转矩控制系统，包括IPM驱动和保护电路，电流电压采样电路以及转速采样电路等。
At last, the control system including the drive and protect circuits of the IPM and the current sample circuits and so on are designed.
但低输入电压却引入了输入滤波器过大等系统设计问题。
However, the low voltage will introduce many problems, especially at the input filter.
对影响单级赝火花开关耐受电压的主要因素，如工作气体、气压、极间隙和孔径等进行了系统的研究。
The parameters which affect the hold off voltage of the one stage pseudo spark switch such as the working gas, the pressure, the gap distance and the hole diameter of the electrodes have been studied.
对影响单级赝火花开关耐受电压的主要因素，如工作气体、气压、极间隙和孔径等进行了系统的研究。
The parameters which affect the hold off voltage of the one stage pseudo spark switch such as the working gas, the pressure, the gap distance and the hole diameter of the electrodes have been studied.
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