通用变频器近十年发展概况

该文阐述了近十年来通用变频器的控制方式,即对Ｕ／ｆ控制系统的改造电压空间矢量控制,矢量控制发展至直接转矩控制,从而能方便地实现无速度传感器比;脉宽调制技术从正弦ＰＷＭ发展至优化ＰＷＭ技术和随机ＰＷＭ技术和随机ＰＷＭ技术;功率器件由ＧＴＯ,ＧＴＲ,ＩＧＢＴ发展至智能模块ＩＰＭ,使其开关速度快,驱动电流小,控制驱动简单,故障率大大降低,干扰得到有效控制,保护功能进一步完善。     

特大功率组合变流器的相移SPWM技术

针对目前在特大功率变流器场合，由于ＧＴＯ等特大功率开关器件的频率限制难以应用Ｓｐ。ＷＭ技术的现状，本文提出了一种组合变流器的相移ＳＰＷＭ技术。此技术将低开关频率的变流器用相移ＳＰＷＭ的方式连接成组合变流器，其优点为：①单个变流器的工作频率是很低的，这对器件频率特性降低了要求，并减少了开关损耗。②有效地降低了大功率变流场合的输出谐波含量，改善了输出波形。③组合变流器有较好的线性调节度，传输带宽。便于调节和控制。文中给出了此技术的实现方案，并对相移ＳＰＷＭ组合变流器的输出电压频谱，传输线性度和传输带宽进行了分析。     

80C196单片机控制闭环逆变系统的研究

介绍了基于８０Ｃ１９６单片机控制的变频调速系统的构成及工作原理,详细论述了ＰＷＭ模块用于ＧＴＯ逆变系统的方法及ＧＴＯ门极触发方案。实验结果证明该系统性能优良、工作可靠。     

80C196单片机控制闭环逆变系统的研究

介绍了基于８０Ｃ１９６单片机控制的变频调速系统的构成及工作原理,详细地述了ＰＷＭ模块用于ＧＴＯ逆变系统的方法及ＧＴＯ门极触 发方案,。实验结果证明该系统优良,工作可靠。     

80C196单片机控制闭环逆变系统的研究

介绍了基于８０Ｃ１９６单片机控制的变频调整系统的构成及工作原理,详细地论述了ＰＷＭ模块用于ＧＴＯ逆变系统的方法及ＧＴＯ门极触发方案。实验结果证明该系统性能优良、工作可靠。     

80C196单片机控制闭环逆变系统的研究

介绍了基于８０Ｃ１９６单片机控制的变频调速系统的构成及工作原理。详细地论述了ＰＷＭ模块用于ＧＴＯ逆变系统的方法及ＧＴＯ门极触发方案。实验结果证明该系统性能优良、工作可靠。     

高性能PWM控制器FAN7554及其应用

1　引言ＦＡＮ75 5 4是美国仙童半导体公司最新研制的一款电流型脉宽调制 (ＰＷＭ )控制器。与同类产品相比 ,ＦＡＮ75 5 4具有工作稳定性好 ,抗干扰能力强的显著特点 ,适合于离线功率ＭＯＳ场效应管、ＤＣ ＤＣ转换和其他开关状态电源 ,特别应用于桌面电脑、显示器和电源变压器等。该芯片的引脚定义如下表所示。表　引脚号引脚名称引脚功能描述1ＦＢ ＰＷＭ比较器的倒相 ( -)输入 ,开 /关控制和ＯＬＰ检测端2Ｓ/Ｓ软起动3ＩＳ ＰＷＭ比较器的非倒相 ( +)输入 ,ＯＣＬ检测端4Ｒｔ/Ｃｔ 振荡器时间常数 (Ｒｔ/Ｃｔ)5ＧＮＤ接地6ＯＵＴ门驱动…     

日本的灯泡工业

日本的灯泡工业Ｔ．ＨＡＮＡＤＡＴＯＳＩＨＢＡＬＩＧＨＴＩＮＧ＆ＴＥＣＨＮＯＬＯＧＹＣＯＲＰＲＡＴＩＯＮＭＩＮＡＭＩＳＨＩＮＡＧＡＷＡＳＨＩＮＡＧＡＷＡ－ＫＵＴＯＫＹＯ１４０ＪＡＰＡＮ１．引言自从１９７９年爱迪生发明第一只白炽灯以来，光源的效率通过各种...     

GTO门控电路及其电压型变频器

介绍一小容量ＧＴＯ门极驱动电路和带零矢量分割，磁通轨迹ＰＷＭ法控制的ＧＴＯ电压型变频器。控制系统用两片８０９８单片机，并采用实时计算法。该变频器的试验令人满意。     

配电系统自动化及其发展（五）──配电图资系统AM／FM／GIS

配电系统自动化及其发展（五）──配电图资系统ＡＭ／ＦＭ／ＧＩＳ刘广一，王明俊，于尔铿电力部电力科学研究院，１０００８５北京清河ＤＩＳＴＲＩＢＵＴＩＯＮＡＵＴＯＭＡＴＩＯＮＡＮＤＩＴＳＤＥＶＥＬＯＰＭＥＮＴ（Ｖ）──ＡＵＴＯＭＡＴＥＤＭＡＰＰＩＮＧ／Ｆ...     

三相电压型低谐波PWM整流器主电路参数间的关系

三相电压型低谐波PWM整流器主电路的多个参数之间的关系较为复杂，在仿真和实验中，若给出的参数不合理，则变换器不能正常工作，从而给仿真和实验带来一定困难。文章在考虑了输入电阻的情况下，给出了功率因数角为任意值时，主电路各参数和控制参数间的稳态关系及一些参数的约束关系。上述关系对于分析和设计被研究电路具有很好的指导意义，文中的公式通过了仿真验证。     

全数字式步进电机连续细分方法与实现

提出一种全数字式,具有连续细分倍数的步进电机细分新方法,并详细介绍了基于ＥＰＲＯＭ和ＰＷＭ技术的实现原理以及技术手段,最后通过采用该方法实现的０－１５连续细分实验笔性能测试,证明了该方法的先进性,可靠性和实用性。     

优化特定消谐PWM技术

本文提出了一种进一步减少特定消谐ＰＷＭ波形剩余谐波畸变率和改善剩余谐波频谱分布的新方法——优化特定消谐ＰＷＭ技术。这项技术在继承了特定消谐ＰＷＭ技术诸多优点的基础上克服了特定消谐ＰＷＭ技术剩余谐波含量大的缺点，使剩余谐波的第一波峰向后推移，有效地降低了输出ＰＷＭ波形的谐波畸变率。本文以消除谐波数Ｍ＝１３为例说明优化特定消谐理论，并通过计算机仿真验证了理论分析的正确性。这一技术在逆变电源、变频调速、无功补偿等领域具有广阔的应用前景。     

Analysis and Implementation of an Interleaved ZVS Converter with High Input Voltage

An interleaved half‐bridge converter is presented for high input voltage application. The features of the proposed converter are zero voltage switching (ZVS) turn‐on for all active switches, ripple current reduction at output side, load current sharing and load voltage regulation. Two half‐bridge converters connected in series and two split capacitors are used to limit the voltage stress of each power switch at one‐half of input DC bus voltage. Thus, active switches with low voltage stress can be used at high input voltage application. On the other hand, the output sides of two half‐bridge converters are connected in parallel to share the load current and reduce the current stresses of the secondary windings and the rectifier diodes. Since two half‐bridge converters are operated with interleaved pulse‐width modulation (PWM), the output ripple current can partially cancel each other such that the resultant ripple current at output side is reduced and the size of output inductors can be reduced. In each half‐bridge converter, asymmetrical PWM scheme is used to regulate the output voltage. Based on the resonant behavior by the output capacitance of MOSFETs and the leakage inductance (or external inductance) of transformers, active switches can be turned on at ZVS during the transition interval. Thus, the switching losses of power MOSFETs are reduced. The proposed converter can be applied for high input voltage applications such as three‐phase 380‐V utility system. Finally, experiments based on a laboratory prototype with 960‐W rated power are provided to demonstrate the performance of proposed converter. Copyright © 2012 John Wiley & Sons, Ltd.     

电力电子技术及其应用的最新发展（一）

本文就电力电子技术中功率器件，变换技术领域的最新发展进行综述，特别对ＤＣ－ＤＣ变流器及功率因数校正技术的当前最新发展的向作了详细的介绍和分析     

ZVS DC/DC converter with series half‐bridge legs for high voltage application

This paper presents a new DC/DC converter with series half‐bridge legs for high voltage application. Two half‐bridge legs connected in series and two split capacitors are used in the proposed circuit to limit the voltage stress of each active switch at one‐half of input voltage. Thus, active switches with low voltage stress can be used at high DC bus application. In the proposed converter, two circuit modules are operated with an interleaved pulse‐width modulation scheme to reduce the input and output ripple currents and to achieve load current sharing. In each circuit module, two resonant tanks are operated with phase‐shift one‐half of switching cycle such that the frequency of the input current is twice the frequency of the resonant inductor current. Based on the resonant behavior, all MOSFETs are turned on at zero voltage switching with the wide ranges of input voltage and load conditions. The rectifier diodes can be turned off at zero current switching if the switching frequency is less than the series resonant frequency. Thus, the switching losses on power semiconductors are reduced. The proposed converter can be applied for high input voltage applications such as three‐phase 380‐V utility system. Finally, experiments based on a laboratory prototype with 960‐W rated power are provided to demonstrate the performance of proposed converter. Copyright © 2011 John Wiley & Sons, Ltd.     

PWM开关功率变换器闭环系统数值仿真的一种方法

提出了ＰＷＭ开关功率变换器闭环系统分阶段数值仿真的一种方法。将主电路及控制电路作为一个统一的整体,建立闭环系统各子拓扑的线性状态微分方程,使各拓扑切换时刻的确定变得非常简单且提高了仿真效率。     

全桥三电平直流变换器的控制方式与设计

提出了一种新型的零电压开关全桥三电平直流变换器。该变换器以能量传输比最大、滤波电感电流纹波最小、开关管实现软开关等为条件，寻找到了最佳开关方式，克服了传统零电压开关全桥直流变换器中开关管电压应力高、整流二极管存在寄生振荡等缺点，所以其变换效率更高，响应速度更快，进一步拓宽了它的应用范围。最后通过一个3kw、50kHz的实验样机，验证了分析结果。     

Analysis and implementation of a soft switching DC/DC converter with three asymmetric PWM circuits

This paper presents a soft switching converter with three buck‐type active clamp circuits (or asymmetric half‐bridge circuits) to achieve the functions of the low power rating on the transformers and power semiconductors and low current rating on the rectifier diodes and output inductors. Three half‐bridge circuits are stacked at the high voltage side to reduce the voltage stress of each power switch at one‐half of input voltage and connected in parallel at the low voltage side to share load current and reduce the current rating on each magnetic component and the rectifier diode. Thus, the size of the output chokes is reduced. In each half‐bridge converter, the asymmetric pulse‐width modulation is adopted to control power switches. Power MOSFETs can be turned on with zero voltage during the transition interval due to the resonant behavior by the output capacitance of MOSFETs and the leakage inductance (or external inductance) of transformers. Experiments based on a laboratory prototype with 1 kW rated power are provided to demonstrate the performance of proposed converter. Copyright © 2012 John Wiley & Sons, Ltd.     

家用电器变频控制系统辅助电源的研制

设计一种适用于家用电器变频控制系统的平铺式开关电源，其功率变换器采用双端反激式结构以降低开关管的电压应力，控制电路采用新型的PWM功率集成控制芯片Si9120 IC。该电源具有稳定性好、可靠性高、电路比较简单、结构紧凑、效率高等优点。仿真和实验结果都证明了该设计的可行性。