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。
To describe the operating principle and control, this paper focuses on an example: a Z-source inverter for dc-ac power conversion needed in fuel cell applications.
以应用于燃料电池逆变功率变换的阻抗源逆变器为例，分析了其工作原理和控制方法。
Within a two-band tight-binding model driven by a dc-ac electric field, we investigate the effect of external noise on the transport property of electrons in superlattices.
运用直交流电场驱动下的双带紧束缚模型，研究了噪声对超晶格中电子输运性质的影响。
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。
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。
Systems are generally solar panels, batteries, controller, DC-AC change devices and lamps and so on.
系统一般由太阳能电池板、蓄电池、控制器、DC-AC转变器和照明灯具等组成。
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。
The paper gives two kinds of approaches to measure the ripple current in input current of DC-DC converter or DC-AC inverter.
文中叙述了直流—直流变换器或直流—交流逆变器输入电流中纹波电流的二种测量方法。
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。
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。
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。
To be able to provide 220VAC electrical power, solar power generation system needs to be issued by the exchange of DC can be converted into electrical energy, so need to use the DC-AC inverter.
为能向220VAC的电器提供电能，需要将太阳能发电系统所发出的直流电能转换成交流电能，因此需要使用DC-AC逆变器。
A damping circuit is a type of low pass filter that reduces the electrometer's ac response so the low DC current can be measured accurately.
该衰减电路是一种降低静电计交流响应的低通滤波器，使我们可以准确地进行直流弱电流的测量。
Purpose: it can be used as shunt and load resistor in DC or ac circuit of electric facility and electron instrument widely.
用途：可广泛用于各种电气设备和电子仪器的直流或交流电路中作分流或负载电阻等。
When applied voltage waveforms are dc, ac and slow pulse, voltage amplitude during discharge can be ignored.
在直流、交流以及宽脉冲电压波形条件下，电压上升速率相对缓慢，放电时延内电压增幅可忽略不计。
Can be 0 ~ 500v voltage range ac and DC voltage measurements with high accuracy.
可以对0 ~ 500v电压范围内的交、直流电压进行较高精度的测量。
As the transmission length reaches a certain distance, DC transmission becomes economically attractive over ac.
当输电距离足够长时，直流输电的经济性将优于交流输电。
A novel topology of high frequency link DC ac converter with bi directional flyback mode is proposed, and its operational principle and control strategy are introduced briefly.
提出了一种新颖的双向电流源高频链DC A C功率变换器的拓扑结构，并简要地阐述了其工作原理和控制方案。
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。
The high voltage endurance test device for switch tube is composed of high voltage pulse generator, high voltage breakdown detector, trigger, auto-controller and DC/AC converter.
开关管冲击耐压装置由高压脉冲产生器、击穿检测器、触发器，及自动控制器、DC/AC变换器等构成。
The current controller on the HVDC line can do AC/DC parallel tie-line local control or improve the stability of AC/DC hybrid power systems.
直流功率调制器可以对交直流联络线进行局部控制或改善交直流混合系统的运行特性。
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。
It is performed in AC or DC with voltages varying from some hundred volts to several tens of kilovolts.
交/直流电压，电压几百伏到数万伏可调。
The reason was that over the short distances spanned by early power grids, AC transmission suffers lower losses than DC. It thus became the industry standard.
选择交流电作为工业标准的原因很简单，在早期供电距离很短的电网里，交流电的损耗比直流电小。
The reason was that over the short distances spanned by early power grids, AC transmission suffers lower losses than DC. It thus became the industry standard.
选择交流电作为工业标准的原因很简单，在早期供电距离很短的电网里，交流电的损耗比直流电小。
应用推荐