查询词典 phase converter

The windings in the valve side adopt prolonged delta connection providing the circuit for three-multiple harmonic currents, and implementing 12-pulse converter through fit ratio; this connection between the common winding and prolonged winding can decrease the current impact when phase conversion takes place.

该换流变压器阀侧绕组采用延边三角形接线，为3倍次谐波电流提供通路；通过匝比配合，实现12脉波换流；其延边绕组与公共绕组构成自耦变压器接线，可减少换流器换向时的电流冲击；在公共绕组上连接滤波支路，并调至谐振点，配之以变压器巧妙的零阻抗设计，可以在阀侧实现无功补偿，可实现网侧绕组中无5、7、11、13次特征谐波，即谐波屏蔽。

Permanent magnet synchronous generator ; direct-driven wind energy conversion system ; sensorless control ; back-to-back converter ; phase lock loop

永磁同步发电机；直驱风电系统；无速度传感器控制；背靠背变流器；锁相环

This dissertation is focus on the study of shunt converter of Unified Power Quality Controller for three-phase four-line distribution power system which capacity is 10kVA.

本文以校&十五&专项科技基金课题&柔性供配电系统(配电FACTS，FACDS)&为研究背景，重点研究了用于配电系统的三相四线制统一电能质量控制器中的并联部分，容量为10kVA。

In this paper, a current control mathematical model is established with fixed switching frequency for three-phase pulse width modulated converter.

建立了三相电压型PWM整流器电流控制数学模型，输入电流在静止坐标系下实现了固定开关频率的解耦控制。

This thesis focuses on maximum-power-point-tracking algorithm applying for wind-turbine generator system. The system includes the serve-motor, induction generator, three-phase full bridge rectifier, buck converter and fixed load. This thesis uses traditional Current Perturbation Algorithm as well as Perturbation Stochastic Approximation Algorithm to implemented with Matlab/simlink and hardware to achieve the maximum power tracking.

本文针对风力发电系统提出最大功率追踪法则，整体系统架构包含了伺服马达、感应发电机、三相全桥式整流器、降压直流转换器和固定负载，并由传统电流型扰动观察法合并扰动近似演算法，进行Matlab/simlink 模拟与电路实作设计来完成最大功率追踪。

An improved space vector modulation for the two kinds of simple active clamp three phase PFC converter is proposed.

并提出与简化的两类有源箝位软开关三相PFC电路相配合的改进的空间矢量调制方法。

Due to the prodigious proportion of medium and big electronic equipment in power line, the research of three phase reversible converter is becoming the researching hotpot on international and native.

由于中大功率的电力电子设备在电网中占很大的比重，因此高功率因数的三相可逆变流器的研究已成为当今国内外研究的一大热点。

In Chapter 2, the character and operating principle of the new topology are discussed. Design of a three phase five-level converter prototype and a digital control scheme with DSP and CPLD are proposed.

第二章详细分析了这种新型拓扑的结构特点及工作原理，给出了三相五电平样机设计方案，并针对新型拓扑样机给出了基于DSP和CPLD的全数字控制方案。

A novel secondary side clamping phase shifted full bridge converter has been proposed in this paper.

引 言全桥移相电路因能够实现主开关管的软开关，故在中、大功率场合被大量使用。

The topology structure is modified on the basis of basic principle of phase shift fullbridge ZVZCS PWM converter.

在移相全桥ZVZCS PWM变换器基本原理的基础上，对其拓扑结构进行了改进，实现了一种带双变压器结构的零电压零电流移相全桥PWM控制变换器。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。