查询词典 commutation

This paper presents basic theory of Sparse Matrix Converter, controlling method and zero current commutation; Lastly, this paper provide the simulink waveforms based on SIMULINK.

本文介绍了稀疏矩阵变换器的基本原理、控制策略、零电流变换方法，同时给出了基于SIMULINK 的仿真波形。

A precise moving FEM analysis model is presented, in which the cogging effect and commutation are included in performance calculation.

建立了合理的永磁直流电动机动态有限元分析模型，该模型中考虑了齿槽效应和绕组换向对电机性能的影响。

Through enclosure, cottagers who share common rights in the parish also got a small piece of field and tithe owner also got estate through tithe Commutation.

因而，就单个的教区而言，圈地使土地所有者原先分散的土地集中到了一起，就整个英国而言，圈地运动为19世纪晚期地产结构的确立创造了条件。

From the early airspace to commutation area and based on physical model, the disquisitive extension has developed widely.

目前数字水印技术已被广泛应用，而它正成为网络环境下图形的版权保护和侵权检测研究的热点。

The selection of form is nonaccidental because of the fact that the adjacent joints are located the right angle to each other, the commutation of cables and devices simplifies.

由于是显而易见的照片，第一选矿厂和形式类似于字母T ，和另外两个类似的信十的选择形式nonaccidental ，因为这样的事实，即邻近关节位于直角互相减刑的电缆和设备的简化。

The selection of form is nonaccidental because of the fact that the adjacent joints are located the right angle to each other, the commutation of cables and devices simplifies.

作为是明显的照片，第一选矿厂和对形式类似于字母T ，和另外两个类似的信十，选择的形式是nonaccidental ，因为这一事实，即毗邻的关节，位于该直角向对方，整流电缆及设备简化。

The selection of form is nonaccidental – because of the fact that the adjacent joints are located the right angle to each other, the commutation of cables and devices simplifies.

由于可见的照片，并在选矿厂第一笔信的形式相似，两名队员都是类似信件十大遴选表格nonaccidental-因为事实位于相邻的节点，互为直角，减刑电缆及器件简化。

Based on two kinds of control strategies of VSR under unbalanced grid condition,the introduction of a new VSR control strategy featuring undamped -oscillation that simplifies the controller structure and effectively improves VSR"s performance under unbalanced grid condition.· A systematic description of the state switching in trilogic PWM signal generation of three-phase CSR by using the conversion between bilogic and trilogic switching functions.· Referenced to the CSR"s trilogic PWM signal generation, an approach to achieve low-stress natural commutation of switching devices by reshuffling the vector composition sequence, resulting reduced switching loss.

在研究了两类电网不平衡时的VSR控制策略基础上，提出了一种新型的基于无阻尼振荡控制器的VSR不平衡控制策略，在简化控制结构的同时，有效地改善了电网不平衡时的VSR控制性能；·通过二、三值逻辑开关函数间的转换，系统地描述了三相CSR三值逻辑PWM信号发生中的状态切换；·结合三相CSR三值逻辑PWM信号发生规律，提出了通过调整矢量合成顺序而使功率管获得自然换相的低电压应力SVPWM控制，从而有效地降低了功率管的开关损耗。

Referenced to the CSR's trilogic PWM signal generation, an approach to achieve lowstress natural commutation of switching devices by reshuffling the vector composition sequence, resulting reduced switching loss. With the background of and well instanced by the Xinjiang Autonomous Region's Key SciTech Project"Solar Photovoltaic grid-connected inverter", the dissertation work implemented the new approach of a grid-connected PV inverter that was of single-phase VSR topology and with MPPT .

在研究了两类电网不平衡时的VSR控制策略基础上，提出了一种新型的基于无阻尼振荡控制器的VSR不平衡控制策略，在简化控制结构的同时，有效地改善了电网不平衡时的VSR控制性能；通过二、三值逻辑开关函数间的转换，系统地描述了三相CSR三值逻辑PWM信号发生中的状态切换；结合三相CSR三值逻辑PWM信号发生规律，提出了通过调整矢量合成顺序而使功率管获得自然换相的低电压应力SVPWM控制，从而有效地降低了功率管的开关损耗。

The experimental results indicated that the thrust fluctuation of the machine was unconspicuous, and no commutation was required during the stroke range.

对电机推力特性、推力密度和发电效率进行了分析及优化，并研制了一台最大推力为4 kN的样机。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。