变换器

In this paper,the development status of direct-driven variable-speed constant-frequency permanent magnet wind-power generators around the world was introduced.

介绍了国内外直驱变速恒频永磁风力发电机的发展应用状况，对发电机的结构、特点和转子磁钢进行了描述，针对它的特殊结构对其电磁系统设计方法及电力电子变换器进行了研究，最后指出了直驱变速恒频永磁风力发电机的发展趋势和研究方向，以期推进我国风力发电机的研究和应用。

After analyzing the general power convenor ,a soft switching converter power will be introduced to depress and remove its ripples and wastage .

在分析常用功率变换器的基础上，引进软开关技术，用来降低电机的损耗和脉动。

The theory of analysis and synthesis of DC-DC switching power converters are studied in this dissertation.

本文着重研究了DC-DC开关变换器的分析和综合理论的一些主要问题。

ABSTRACT The theory of analysis and synthesis of DC-DC switching power converters are studied in this dissertation.

本文着重研究了DC-DC开关变换器的分析和综合理论的一些主要问题。

Nonlinear tracking control is one of the important control strategies for PWM converters.

非线性跟踪控制是SPWM变换器的重要控制策略之一。

By the mathematics and circuit modeling, the two convertors control systems are simulated.

文中也通过数学建模和电路建模两种方式，对两级变换器控制电路分别进行了仿真。

Firstly, the reasons of lower power factor and high harmonic are analyzed in the conventional laser power supply, and the need of load characteristic of the laser is also thought. So the new type high performance power supply of DPSSL which is constituted of two convertors is obtained. The principle of the main circuit, control method and protective circuit are described.

本文首先通过对传统激光电源中功率因数低、谐波电流大等缺点的分析，再结合半导体泵浦源的特性要求，提出了一种基于两级变换器的新型高性能半导体泵浦固体激光器电源。

A new kind of electricity transformer which indudes capactiors, diodes and switches is introduced in this paper.

介绍了一种用电容器、二极管和开关组成的新型电能变换器。

Keywords: matrix converter; input filter; damping factor; EMI

关键词﹕矩阵变换器；输入滤波器；阻尼系数；EMI

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。