尤其适合以igbt作为主功率开关管的高电压、大功率功率变换，具有广泛的应用前景和巨大的经济价值。
So this novel converter has a wide application and huge economy effect in power converting field, especially in the high voltage and high power feild where IGBT is used as the main switch.
介绍了在三相三开关高功率因数变换器中应用复杂可编程逻辑器件(CPLD)实现逻辑控制部分的方案。
This paper introduces a scheme in which a complex programmable logic device (CPLD) is used in the three phase three pole switch high rating factor convertor to realize logic control.
利用电压空间矢量脉宽调制(SVPWM)信号变换控制功率变换器各开关器件的导通占空比，实现异步电动机的速度调节。
Using space vector pulse-width modulation (SVPWM) signal transformation method, speed regulation of induction motor is implemented by controlling the duty ratio of every converter switch.
软开关技术能够有效改善功率开关管的工作环境，降低开关损耗，提高变换器的效率。
Soft switching technique could improve the circumstance of the power switch, reduce the losses and increase the efficiency of the converter.
主要论述了基于四电平功率变换电路的开关磁阻电机直接瞬时转矩控制。
In this paper, a direct instantaneous torque control (DITC) of switched reluctance motor (SRM) with a four-level converter is presented.
为了实现开关磁阻电机(SRM)绕组电流或磁链的精确控制，必须提高SR M功率变换器的工作频率以提高系统的动态响应速度。
To achieve the precision control of phase current or phase flux linkage in switched reluctance motor (SRM), the higher switching frequency of converter is required to increase dynamic response speed.
考虑到系统功率较大，三相桥式功率变换器的每个开关器件均采用四个MOS管并联的结构。
For high power system, every switch of three-phase inverter is actually made up of four MOSFETs in Parallel.
随着逆变器输出性能和功率密度需求的不断提高，如何在较高开关频率下进一步提升逆变器的变换效率，显得越来越重要。
As the requirements for higher power density and output performance, how to keep the inverter at a relative higher efficiency at higher switching frequency is becoming more and more important.
本课题针对开关功率变换器的小型化和绿色化进行研究。
This paper is mainly focus on the research of small size and greenness of switching power converter.
可以预见软开关技术的应用可使电力电子变换器具有更高的效率和更高的功率密度。
It can be seen in the future, power electronics converter will get higher efficiency and power density.
采用谐振电路和PWM开关结合，组成电压谐振开关，实现DC—D C功率变换。
In order to make DC DC power converted, voltage resonant switch is combined by resonant circuit and switching PWM.
该文提出了一类基于反激变换器的单级不间断高功率因数直流开关电源电路结构与拓扑族。
Novel circuit structure and topologies of single-stage DC switching power supplies with uninterruptible power supply and high power factor, based on flyback converter, are proposed.
提出了一种零电压软开关高功率因数变换器电路。
The paper presents a kind of zero-voltage soft-switching unity power factor converter.
把精细时程积分法引入开关功率变换器的时域响应分析中。
A new precise time - integration method is introduced into the analysis of time domain response to switched power converters.
该装置的电路由脉冲形成源、压频变换器和光耦与功率开关三部分组成。
The circuit of this device is formed the source, pressed frequently by the pulse changer, photosensitive resister and power switch three parts make up.
针对微波电子电源高电压、大功率的特点，提出了采用前后两级开关变换结构的设计方案。
The microwave electronic power supply requires high voltage and high power, so the two-section conversion structure, the front and the back, is adopted in the designing scheme of the power supply.
在硬开关状态下，PWM功率变换器的致命弱点是开关管开关损耗随开关频率成正比增加，不利于系统的集成和转换效率的提高。
The shortcoming of hard switch is that the power loss of power devices increases with the switching frequency, which is no good for system integration and improvement of conversion efficiency.
为解决开关器件在多电平高压功率变换器的驱动和保护问题，提出了一种光纤隔离的驱动保护电路。
The circuit isolated by optical fibre for transmitting drive signals and avoiding over current is proposed to solve drive and protection problems for transistors in high-voltage multi-level convertor.
在这三者中，开关电容变换器以其高效率，EMI小，体积小的特点在便携式产品和中小功率应用场合得到了广泛的应用。
Among them, switched capacitor DC-DC converters have got wide applications in portable products and small and medium-power areas due to their high efficiency, small EMI and small size.
介绍了一种用普通开关电源专用集成电路控制块作为控制电路，以升压式变换器作为功率电路的功率因数校正电路。
Describes a power factor correction (PFC) circuit, in which the power circuit is a boost converter controlled general switch mode controller IC.
简单介绍了DC-DC 开关功率变换器的线性化分析方法和线性控制方法，以及DC-DC 功率变换器离散映射模型分析及其混沌控制的意义及现状。
Linear analytical and linear control methods are compendium. Meaning and present status about analysis of discrete map mode on DC-DC converters and their chaos control are generalized.
介绍一种带变压隔离器、含多个功率开关器件的PWM变换器工作在连续状态的建模方法。
A new method is introduced for modeling PWM DC-DC converter with multi-switches and transformers, which operate in continuous conduction mode, including parasitic components.
介绍了PWM开关功率变换器电路的统一建模方法，并将谐波分析方法应用于电路分析中。
This paper introduces the method of unified modeling for PWM switched converter, and draws the analytic method of harmonic balance into the analysis of the circuit.
在开关频率较低的情况下，大功率PWM变换器的谐波可能会更大，并对电力电子设备造成损坏或产生电磁干扰影响通讯。
The harmonic distortions of the high power PWM converters increase more with low switching frequency, which may destroy the devices used in the system and result in electromagnetic interference (EMI).
主电路采用具有无源辅助谐振网络的双管正激变换器，与普通双管正激变换器相比，功率管开关状态得到较好的改善，同时并没有增加电路的复杂性。
This paper introduces the circuit topology of portable inverter arc welder with soft snubber, mainly power circuit is a double switch forward converter with assistant resonant circuit.
开关功率放大器由于开关变换器本身固有的非线性，失真通常大于传统的线性放大器。
The distortion introduced by switching power amplifier is typically larger than in their liner counterparts due to intrinsic nonlinearity of switching converter.
DC开关变换器非线性程度很高，输入电流为非正弦形式，功率因数极低。
AC/DC switching converters are highly nonlinear. Therefore they draw a non-sinusoidal current with a very low power factor.
由DSP发出移相控制信号并经芯片IR 2110驱动放大，在移相驱动信号的控制下可以实现全桥变换器主功率开关的ZVS。
The DSP sends out the phase shifting control signal and then that amplified by IR2110 chip. It can realize ZVS of the full bridge converter main power switch by the phase shifting drive control.
分析了一种新颖的零电压零电流(ZVZCS)开关之电平变换器，以及功率晶体管的驱动电路。
A novel zero-voltage and zero-current switching (ZVZCS) three-level converter, and the drive circuit of the transistor were analyzed.
本文在分析X射线管外特性的基础上，设计制作了开关电源功率主电路，分析了有源功率因数校正器原理、LCC半桥谐振变换器原理及倍压整流电路原理。
This paper based on analyzing the X-Ray tube designs the switching power supply circuit, analyzes the principle of APFC, LCC half bridge resonance convertor and dual rectifier circuit.
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