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diode clamped
相关语句
  二极管嵌位
     At present, cascaded multicell converter, diode clamped multilevel converter and flying capacitor multilevel converter are 3 mainly converting topologies.
     目前,多电平变频器的主要结构形式可分为二极管嵌位型,电容嵌位型和单元级联型三种。
短句来源
  “diode clamped”译为未确定词的双语例句
     One is the combined diode clamped and combined flying capacitor multilevel topologies, which are derived by combining traditional diode clamped and flying capacitor multilevel topologies with two-level bridge legs.
     其中一类为二极管箝位组合型和飞跨电容组合型拓扑。 该类拓扑通过组合传统的二极管箝位型或飞跨电容型多电平拓扑与两电平桥臂得到。
短句来源
     The Diode clamped multilevel inverter (DCMLI) does not require a separate DC power source to maintain voltage at each level and has been attracting wide industrial interests recently.
     二极管箝位式多电平逆变器 ( DCMLI)因无需独立的直流电源来维持每级电压而备受青睐。
短句来源
     The three-level Buck and Boost topologies are derived from the traditional diode clamped three-level inverters' bridge leg firstly. Then, a single phase three-level PFC circuit is discussed based on the three-level BOOST topology.
     论文首先从传统的二极管箝位型三电平变换器中推导出具有实用价值的三电平Buck和Boost电路拓扑,以后者为基础,重点研究了基于三电平Boost电路的三电平PFC电路的原理及实现问题。
短句来源
     One was the combined multilevel converter topologies which were constructed by combining the conventional diode clamped or flying capacitor multilevel converters with two-level bridge legs;
     其中一类是通过组合传统的二极管箝位型或飞跨电容型拓扑与两电平桥臂得到的组合型拓扑;
短句来源
     Diode clamped multi-level inverter (DCMLI) gains more and more attention in fields of high power and voltage due to its simple structure, high quality output wave and ability to decrease the rated voltage of switch devices.
     二极管箝位式多电平逆变器由于结构简单,输出波形质量高,可以降低器件耐压等级,在高压大功率场合备受关注。
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  相似匹配句对
     Research on Diode-clamped PWM Three-level Inverter
     二极管钳位式三电平逆变器PWM控制的研究
短句来源
     STUDY OF CONTROL SYSTEM OF DIODE-CLAMPED THREE-LEVEL INVERTER
     二极管箝位型三电平逆变器控制系统研究
短句来源
     Dynamics of R-L-Diode System
     R-L-Diode系统的动力学
短句来源
     IMPATT DIODE SIMULATION
     雪崩二极管的计算机模拟
短句来源
     The Experiments of Gain-clamped SOA
     增益钳制半导体光放大器的实验研究
短句来源
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  diode clamped
When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground.
      
This converter obviously overcomes the limitation of diode-clamped three-level converters and offers new interesting properties.
      
This approach obviously overcomes the limitation of diode-clamped multilevel converters.
      
Outputs are TTL compatible or can sink 250mA, diode clamped to 40V.
      
If an inductive load is used, such as a small relay, the load should be diode clamped to prevent damage.
      


Multilevel inverters that provide more than two voltage levels and less distorted waveform offer many benefits for higher power or higher voltage applications. The Diode clamped multilevel inverter (DCMLI) does not require a separate DC power source to maintain voltage at each level and has been attracting wide industrial interests recently. However, it suffers from problems such as DC bus voltage unbalance and is not widely used in active power transfer. This paper presents a dynamic control algorithm,...

Multilevel inverters that provide more than two voltage levels and less distorted waveform offer many benefits for higher power or higher voltage applications. The Diode clamped multilevel inverter (DCMLI) does not require a separate DC power source to maintain voltage at each level and has been attracting wide industrial interests recently. However, it suffers from problems such as DC bus voltage unbalance and is not widely used in active power transfer. This paper presents a dynamic control algorithm, which can provide a selected output voltage waveform and balance the voltage across the DC bus capacitors in n level DCMLI. The proposed control method based on space vector pulse width modulation (SVPWM) methods uses the product of capacitor voltage deviation and its charging current as a criterion for determination of the switching state to be utilized. Some peculiar space vectors causing the capacitor voltages intrinsical unbalance must be canceled, however. Simulation results about a five level inverter are used to verify the efficiency of the control algorithm

多电平逆变器能产生多阶梯、低失真电压波形 ,特别适合于大功率高电压场合。二极管箝位式多电平逆变器 ( DCMLI)因无需独立的直流电源来维持每级电压而备受青睐。但该逆变器存在直流侧电容电压的不平衡问题 ,因而未能在有功功率变换中得到广泛应用。针对这一问题 ,文中提出一种适用于 n电平 DCMLI的电容电压动态平衡控制算法 ,该算法基于空间矢量 PWM( SVPWM)法 ,用电容电压偏差值与各冗余开关状态下的电容电流预测值的乘积作为衡量电容电压偏离其平衡基准值程度大小的准则 ,通过选取使电容电压偏离程度最小的冗余开关状态来维持电容电压平衡并产生所期望的输出电压波形 ,但同时要舍去某些导致电容电压本质不平衡的特殊空间矢量。以5电平 DCMLI为例 ,仿真验证了该算法的有效性。

The paper pvesnts a novel single phase there-level PFC circuit with passive soft switching. The three-level Buck and Boost topologies are derived from the traditional diode clamped three-level inverters' bridge leg firstly. Then, a single phase three-level PFC circuit is discussed based on the three-level BOOST topology. Two passive soft switching snubber cells are added to three-level PFC circuit to soften the switching processes of the switches and freewheeling diodes. It's operating principle and design...

The paper pvesnts a novel single phase there-level PFC circuit with passive soft switching. The three-level Buck and Boost topologies are derived from the traditional diode clamped three-level inverters' bridge leg firstly. Then, a single phase three-level PFC circuit is discussed based on the three-level BOOST topology. Two passive soft switching snubber cells are added to three-level PFC circuit to soften the switching processes of the switches and freewheeling diodes. It's operating principle and design considerations are discribled in detail. At last, a 2kW prototype of the single phase three-level PFC with the passive soft switching is built and tested. The simulated and experimental results show that the circuit can realize the three-level PFC function and increase system efficiency as well as have no over-voltage stress on main power switches.

摘要:多电平变换技术,功率因数校正技术,以及软开关技术,是目前电力电子技术领域的3个研究热点,该文在这三者之间找到了一个应用的契合点,提出了一种新颖的单相三电平无源无损软开关PFC电路拓扑。论文首先从传统的二极管箝位型三电平变换器中推导出具有实用价值的三电平Buck和Boost电路拓扑,以后者为基础,重点研究了基于三电平Boost电路的三电平PFC电路的原理及实现问题。为了提高系统的效率,且不增加控制的复杂性,将一种无原理性过压的无源无损软开关电路单元引入该电路,文中详细地介绍了其原理和工作过程,给出了相应的设计要点,并进行了仿真研究。最后,设计了1台2 kW 三电平无源无损软开关 [(P)( )(F)( )][(C)( )]电 路 样 机 , 实 验 结 果 表 明 , 该 电路不仅实现了三电平PFC的功能,而且所有功率器件均工作在软开关状态,系统效率高。

SHEPWM, a method to eliminate the selected low order harmonics by optimizing switching time sequence, has been concerned greatly because of its advantages such as high waveform quality, high efficiency, full utilization of DC side voltage and small size of DC side filter. In this paper, Selected Harmonic Elimination Pulse Width Modulation techniques applicable to three-level voltage inverters are studied in detail. In order to get a high convergence speed of the nonlinear equations, an effective method for producing...

SHEPWM, a method to eliminate the selected low order harmonics by optimizing switching time sequence, has been concerned greatly because of its advantages such as high waveform quality, high efficiency, full utilization of DC side voltage and small size of DC side filter. In this paper, Selected Harmonic Elimination Pulse Width Modulation techniques applicable to three-level voltage inverters are studied in detail. In order to get a high convergence speed of the nonlinear equations, an effective method for producing initial values of the nonlinear equations is proposed. The SHEPWM switching time sequence obtained by solving the nonlinear equations numerically is simulated with POWERSIM 4.0, and experimentally verified through a diode-clamped three-level voltage type inverter composed of MOSFET controlled by a two-DSP (TMS320LF2407A) control flat-form. Simulation and experiment results proved the advantages of SHEPWM Technique.

特定谐波消除SHEPWM,通过开关时刻的优化选择,消除选定的低频次谐波,具有波形质量高、效率高、直流电压利用率高、直流侧滤波器尺寸小等一系列显著优点,所以受到人们的普遍关注。该文首先针对1/4周期对称的脉宽调制波形,研究了三电平SHEPWM非线性方程组的求法,提出了以三角载波法生成非线性方程组初值的方法,使得求解非线性方程组的速度明显加快;根据非线性方程组的数值解,用POWERSIM电力电子专用仿真软件对三电平SHEPWM进行了仿真研究; 用小功率MOSFET管构成二极管箝位三电平逆变器实验电路模型,以双DSP中压变频控制平台为控 制器,对三电平SHEPWM方法进行实验研究。仿真和实验结果证实了SHEPWM的谐波消除效果和SHEPWM方法所具有的一系列显著优点。

 
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