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Vr10 \ vr11 . However, on this motherboard whereused only 3 phase converter.

然而，就在这主板，而只用了3相转换。

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。

Based on these, the single phase converter system is studied in detail, including the selection of the main circuit scheme, the formation of Sine-wave Pulse- width Modulation signal, the design of the drive and protection circuit of IGBT, and the design of high frequency transformer. Finally, the simulation software is employed to test the effect. And the result is satisfactory.

在此基础上，本文主要对电能质量控制稳定器所需的DC/AC控制电源进行了详细研究，包括主电路方案的选择、SPWM波的生成、IGBT的驱动和保护电路、高频变压器的设计以及闭环电压控制原理，最后进行了输出电压的计算机仿真分析，结果是令人满意的。

Based on the analysis of traditional converters, a novel circuit is proposed, what it defers from traditional two switches/phase converter is that it has not dump resistance, and that the rise time and falling time of the phase currents can be effectively reduced, and the torque and output power performance of the system is improved .

该文的研究目的在于设计开关磁阻电机并通过对控制理论在SRD系统中的应用进行深入的分析、发展和创新，在保证SR电机的固有优点前提下，改善或消除其存在的缺点，提高系统的性能，逐步开始出相应的产品，进而推广SR电机的应用。

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。

Based for the purpose, this paper develops a simple way named analogue circuit to realize SPWM control. This new way is proved in the design of three- phase small power converter and get good effect.

基于此目的，本文提出用简单的模拟电路实现逆变器正弦脉宽调制的方案，并用此方法实现了小功率三相变频电压源的设计，得到较好的效果。

This thesis firstly discusses some research focus of high-frequency power supply and variable circuit topologies are compared here. Then it emphasizes the operating principle of phase shift full bridge converter and realization of soft switching techniques.

首先简单讨论了目前高频开关电源的研究热点，对各种变换电路拓扑结构形式进行了分析比较，然后重点分析了移相全桥变换器的工作原理和软开关技术的实现。

Based on the analysis of traditional converters, a novel circuit is proposed, what it defers from traditional two switches/phase converter is that it has not dump resistance, and that the rise time and falling time of the phase currents can be effectively reduced, and the torque and output power performance of the system is improved.

在分析了常用的功率变换电路基础上，提出了一种基于双开关功率变换电路的改进电路，该电路与常规双开关功率变换电路的区别在于不需要能耗制动电路，能够利用关断相绕组中储存的能量有效缩短相电流的建立和关断时间，改善SR电机高速运行时输出转矩下降和转矩脉动严重的问题，并且电机的输出功率也得到提高。

The digital part includes rectangular-to-polar converter and digital phase modulator.

数位部份包括直角座标至极座标转换器及数位相位调变器。

In the case of short - circuit,the output current amplitude and phase of PWM converter are controlled to adjust the equivalent impedance of current - limiter for fault current suppression.

故障发生后，通过变流器控制变压器二次侧注入电流的相位和幅值，进而调节限流器的等效阻抗，从而实现抑制短路电流的目的。

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。