The complexity of control strategy is equivalent with that of ac-dc-ac converter, and the voltage transfer ratio is theoretically up to 0.955.
其控制算法与交—直—交变换器控制算法的复杂度相当，电压传输比在理论上可达到0.955。
Some people, however, question that standard because over long distances high-voltage DC lines suffer lower losses than AC.
现在有人开始质疑这一标准的适用性，因为在远距离输电的情况下，采用高压直流(HVDC)要比高压交流损耗小。
The control scheme and operating principle of a double closed-loop AC/DC power converter system are discussed by using physics.
从物理角度讨论了双闭环交/直流功率变换器系统的控制方案和工作原理。
An analog signal is composed of four basic components: DC and AC magnitudes, frequency, and phase.
模拟信号由直流和交流分量、频率和相位四部分组成。
When the antenna receives a signal, the electromagnetic energy is converted from AC to DC.
当天线接收到信号时，电磁能量将从AC转换到DC。
AC-DC dual-use, automatic switch.
交直流两用，自动切换。
The utility model relates to a change-over switch of AC-DC electric welder.
本实用新型涉及一种交直流两用电焊机的转换开关。
The general inverter designed in this dissertation is a 220v voltage type AC-DC-AC modal.
本文设计的通用变频器为单相220V交-直-交电压源型变频器。
Main circuit adopts the AC-DC-AC structure and uses IPM(Intelligent Power Module) as main switch.
主电路采用交—直—交电压源型变频器，功率器件采用智能功率模块IPM。
Finally, the methods for suppressing the oscillation occurred in the AC-DC coupling system are suggested.
最后给出了抑制交直流耦合振荡的方法。
On the other hand, since traction power supply network is a AC-DC network, its running modes are complicated.
另一方面，地铁牵引供电网络是一个交直流混合的网络，运行方式较为复杂。
The system design content includes the AC-DC electric drive control system, diesel generator set control system.
系统设计内容包含了交直流电气传动控制系统，柴油发电机组控制系统。
A separate-controlled AC-DC-AC power load simulator is designed adopting the principle of voltage-type PWM convertor.
本文运用PW M电压型变流器的基本原理，设计了一种分离控制式交-直-交功率负荷模拟器。
Based on the resonance reactor and the Magnetic Energy Recovery Switch (MERS), a novel single-phase AC-DC converter is designed.
将谐振电抗器和磁能恢复开关引入到单相ac - DC变换器中，设计了一种新颖的混合单相ac - DC变换器。
In this paper several methods of the true RMS AC-DC conversion are exemplified, and the advantages of various methods are compared.
本文介绍几种真有效值交直流转换的方法，并对各种方法的优缺点进行了比较。
The AC servo system of FANUC 11 series is a AC-DC-AC conversion frequency speed adjusting system, which use PWM as the speed-adjusting control method.
FANUC一11型交一直一交频调速系统，调速的控制方法为脉冲宽度调制(pwm)法。
Moreover, compared with the traditional AC-DC-AC converter, it removes the huge capacitance, then the volume is reduced and the efficiency is enhanced.
相比于传统的交-直-交变换器去掉了体积庞大的电容，使得体积减小，效率提高。
AC network with DC network are also combined in a AC-DC iterative power flow calculation program through the detailed model of 24-pulse bridge rectifier.
通过对24脉波换流站进行精确建模，将换流站两侧的直流网络和交流网络联系起来，运用交直流潮流迭代计算的方法计算地铁供电网络的潮流分布。
According the operation mechanics of the SCES system, its main circuit containing bi-directional DC-AC-DC converter was designed and its unified model was built.
从超级电容器储能系统的运行机理出发，设计了含双向DC - AC - DC变换器的超级电容器储能系统主电路结构，并建立了其统一模型。
The result indicates the nonlinear variable structure control can adjust the transmission power of DC line effectively, and assure the stability of the AC-DC system.
仿真结果表明，非线性变结构控制可以有效地调节直流线路的传输功率，保证交直流系统的稳定性。
This paper introduces a microprocessor controlled PWM real time controller used in AC-DC-AC electric locomotive. A real-time forming method of multi-mode PWM waveform is described.
介绍了一种用十六位单片机实现的用于控制交-直-交电力机车道变器的PWM实时控制器，论述了PWM波形的实时生成方法。
In AC-DC-AC VVVF, We can accurately measure voltage, current, power and frequency with The HIOKI3164 and TOPVIEW31 analysis software, even if the wave is irregularities and distortion.
利用HIOKI3164和TOPVIEW31分析软件，可对交-直-交变频器中电压、电流、功率、频率进行准确测量，不论它是不规则波形还是畸变波形。
Currcnt-type four quadrant converter is an AC-DC converting device with pulse width modulation, whose advantages are high power factor, low harmonic current and convenient regeneration etc.
电流型四象限变流器是一种脉冲宽度调制的交直流变换装置，具有功率因数高、谐波电流小、再生方便等优点。
Thus, the object of the power system analysis software has been changed from AC power system into AC-DC hybrid power system, which requires the software for the AC power system to be improved.
这样，电力系统分析软件的分析对象从纯交流系统变为交直流混联电力系统，这就要求对纯交流系统的分析软件进行改进。
In this thesis, the operational principle, design approach and system characterization are presented in detail, and a higher efficiency and lower power AC-DC power management chip is designed.
作者对开关电源的工作原理，设计思想和系统性能做了详细的分析，设计了一款高效率、低功耗的AC - DC开关电源芯片。
Auxiliary contactors contact rated voltage of 380v ac, DC to 220v.
接触器辅助触头额定电压为交流380v，直流为220v。
Derived the formula for computing quadratic harmonics of output current in the single phase unit power factor ac DC converter based on analysis of the circuit module of the equivalent current source.
在基于对等效电流源电路模型分析的基础上，推导出了单相单位功率因数变流器输出电流二次谐波的计算公式，将输出二次谐波电流正、反向交替注入交流输入侧来抵消电流中的谐波。
The objective of this work is to design and realize a monolithic off-line AC/DC SMPS switcher.
本课题任务就是设计一款小功率单片集成的离线式AC/DC转换开关电源。
The objective of this work is to design and realize a monolithic off-line AC/DC SMPS switcher.
本课题任务就是设计一款小功率单片集成的离线式AC/DC转换开关电源。
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