高精度的IGBT开关脉冲／直流稳流电源

介绍了一种高精度的大功率IGBT脉冲／直流稳流电源,分析并讨论了IGBT电源的电流快速性和IGBT线性控制技术。     

一种AC/DC开关电源的研制

介绍并比较了电压控制型和电流控制型开关电源的基本原理,提出了一种电压控制型开关电源加电流截止负反馈的方法。由ＳＧ３５２５实现的开关电源电路实例,证明了这种电路的优点。     

稳流型开关电源控制系统研究

在建立全桥移相PWMDC/DC变换器小信号模型的基础上对稳流型开关电源的控制系统进行了研究,给出了稳流型开关电源的闭环控制系统的电路组成和数学模型。引入新型PWM电源控制器UCC3895对中大功率全桥移相软开关方式稳流型开关电源控制电路进行了具体设计。稳流电源控制器由主控芯片UCC3895及其外围的时钟与锯齿波形成、自适应死区设置、隔离驱动、保护、电压电流采样和调节器等子模块组成。用Matlab对控制参数进行了整定,采用PSpice电子仿真软件对系统进行仿真,结果表明根据系统小信号模型设计的开关稳流电源是可行的。     

选择供电方案对供电损耗的影响

针对不同的用户提出了几种不同的供电方案.在电压等级的选择上,尽量选用高一级电压,避免低电压损耗.对用户供电设计宜高压引入,若需要增设变电所,应选好位置.低压系统尽可能采用三相四线制,选择合理的供电半径.     

Series resonant ZCS‐PFM DC‐DC power converter with high‐frequency high‐voltage transformer link for high‐power magnetron drive

This paper presents a single lossless inductive snubber‐assisted ZCS‐PFM series resonant DC‐DC power converter with a high‐frequency high‐voltage transformer link for industrial‐use high‐power magnetron drive. The current flowing through the active power switches rises gradually at a turned‐on transient state with the aid of a single lossless snubber inductor, and ZCS turn‐on commutation based on overlapping current can be achieved via the wide range pulse frequency modulation control scheme. The high‐frequency high‐voltage transformer primary side resonant current always becomes continuous operation mode, by electromagnetic loose coupling design of the high‐frequency high‐voltage transformer and the magnetizing inductance of the high‐frequency high‐voltage transformer. As a result, this high‐voltage power converter circuit for the magnetron can achieve a complete zero current soft switching under the condition of broad width gate voltage signals. Furthermore, this high‐voltage DC‐DC power converter circuit can regulate the output power from zero to full over audible frequency range via the two resonant frequency circuit design. Its operating performances are evaluated and discussed on the basis of the power loss analysis simulation and the experimental results from a practical point of view. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(3): 79–87, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20126     

A novel multi‐output high‐voltage‐isolated power supply system for semiconductor device series‐connected switches

This paper presents a novel scheme of a multi‐output power supply for solid‐state switches based on series‐connected semiconductor devices. By using the loosely transforming method, the system can realize high‐voltage isolation and a compact size, and its application range can be easily expanded to modular designed switch stacks for higher power ratings. The circuit structure and working principles are described. Based on the system operating equations, the design methodology is proposed and applied for parameter specification of a power supply system of two series‐connected switch stacks containing 20 outputs. Detailed calculations are given, and experimental results prove the feasibility of the proposed scheme. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Current waveform control of a high‐power‐factor rectifier circuit for harmonic suppression of voltage and current in a distribution system

This paper presents the input current waveform control of the rectifier circuit which realizes simultaneously the high input power factor and the harmonics suppression of the receiving‐end voltage and the source current under the distorted receiving‐end voltage. The proposed input current waveform includes the harmonic components which are in phase with the receiving‐end voltage harmonics. The control parameter in the proposed waveform is designed by examining the characteristics of both the harmonic suppression effect in the distribution system and the input power factor of the rectifier circuit. The effectiveness of the proposed current waveform has been confirmed experimentally. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 140(4): 62–71, 2002; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10046     

基于PWM控制的新型极化电源设计与实现

在分析比较现有电解槽用极化电源供电电路方案的基础上,提出采用直流斩波调压器替代传统相控整流方式。利用单片机AT89C52,以电压型脉宽调制(PWM)控制器TL494为核心,设计了一种采用整流-斩波变流技术的极化电源,能有效提高功率因数,效率高达90%。并给出了主电路仿真和实验系统模拟实验结果。     

A three‐phase,active power filter with a predictive‐instantaneous‐current PWM controller

One of the most emphasized problems to be solved in power systems in recent years is the line‐current harmonics problem. This is due to the use of diode rectifiers, PWM converters, nonlinear loads, and so on. To reduce or eliminate such current harmonics, an active power filter (APF), which is a sophisticated power electronic converter, has been studied and used in some practical applications. In this paper, we propose and discuss two new control methods for three‐phase shunt APFs: the sinusoidal line‐current control method and the instantaneous‐reactive‐power compensation control method. They are based on pulsewidth prediction control, or a predictive‐instantaneous‐current PWM control. Neither any instantaneous power information nor coordinate transformation is necessary for control. In the sinusoidal line‐current control scheme, the controller governs the switching devices of the APF by using the pulse width that is optimally predetermined at the beginning of every switching period with the sinusoidal current reference. The line currents flow sinusoidally and are in phase with the voltage accordingly. In the instantaneous‐reactive‐power compensation control, the control is performed so that the resultant circuit of the load and the APF is regarded as a time‐variant conductance circuit model. The APF with this control scheme can cancel effectively the instantaneous reactive component produced by the load though the controller is simple. This paper discusses the performance characteristics of the APFs when a three‐phase diode rectifier and an unbalanced load are connected to the line. The practicability of the proposed methods is verified by experiment. © 1999 Scripta Technica, Electr Eng Jpn, 130(3): 68–76, 2000     

应用手动脉冲发生器调压的可调直流稳压电源

针对目前可调直流稳压电源主要采用电位器调压而存在电位器寿命短、故障率高及调压精度低等不足,提出采用手动脉冲发生器作为其调压方式。阐述了系统的总体结构及增量式PI控制算法的基本原理,分析研究了利用手动脉冲发生器调节输出电压设定值的控制方法,并通过样机实验对其效果进行了验证。结果表明:该调压方式具有结构简单、控制灵活、调压精度高、抗干扰性强、使用寿命长等特点,具有一定的应用价值。     

Field trial on a rack‐mounted DC power supply system with 80‐Ah lithium‐ion batteries

Using an industrial lithium‐ion battery that has higher energy density than conventional valve‐regulated lead‐acid batteries, a rack‐mounted DC power supply system was assembled and tested at a base transceiver station (BTS) offering actual services. The nominal output voltage and maximum output current of the system are 53.5 V and 20 A, respectively. An 80‐Ah lithium‐ion battery composed of 13 cells connected in series was applied in the system and maintained by the floating charge method. The DC power supply system was installed in a 19‐inch power rack in the telecommunications equipment box at BTS. The characteristics of the 80‐Ah lithium‐ion battery, the specifications of the DC power supply system, and field‐test results are presented in this paper. \copy 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 174(3): 1–8, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21067     

一种恒压输出的高功率因数开关电源设计

基于具有PFC功能的SA7527控制芯片,设计了一款恒压输出的高功率因数开关电源。在阐述系统工作原理的基础上,重点对单端反激拓扑结构中兼具储能电感作用的高频变压器这一核心部件进行了设计。实验研究结果表明该开关电源在输入电压宽范围变化的情况下,可实现稳定的电压输出,最高功率因数可达0.95。     

EAST快控电源灰色预测均流控制研究

应对超导托卡马克核聚变实验装置中等离子体的垂直位移快控电源大电流快速响应的要求,使用多组逆变单元并联运行方式。为克服电压模式下各支路参数不同导致各支路输出电流的不一致性,提出基于灰色预测模型的均流控制策略,用其预测下一刻电流上升率,实时动态调整各支路脉冲宽度调制(PWM)占空比,实现快控电源的均流控制。仿真与实验结果表明,基于灰色预测模型的均流控制策略使得各支路输出电流具有较好的一致性,验证了该算法在EAST快控电源上应用的可行性和有效性。     

Energy storage system utilizing large‐capacity electric double‐layer capacitors for peak‐cut of power demand

Recently, due to a rapid increase of demand for air conditioning in summer, peak power demand is becoming increasingly acute. Therefore, the load factor has a tendency to drop every year. The drop of the load factor is leading to a drop in the utilization factor of the power facilities and an increase in the cost of installation. In this paper, we propose an energy storage system for peak‐cut of power demand, in which we use large‐capacity electric double‐layer capacitors. This energy storage system has some distinctive characteristics, including long life span, maintenance‐free operation, preservation of environment, high efficiency at charge/discharge, and so on. This paper deals with the circuit arrangement of the proposed energy storage system, the charge equalization method of the capacitors, and the control method of the converter at charge/discharge. Finally, the operating characteristics of this system are evaluated by simulation analysis. © 2000 Scripta Technica, Electr Eng Jpn, 133(3): 83‐92, 2000     

一种可控恒流脉冲刺激器设计

为满足术中神经监测系统中运动诱发电位刺激器的设计需求,设计了一种可控恒流脉冲刺激器。采用2个基于UC3845的反激式开关电源产生所需电压,IGBT作为总开关管控制脉冲发放,三极管控制电路实现恒流。刺激器的特点是输出脉冲参数调节范围大、输出档位多、控制精度高、响应速度快而且档位多。当所有设置完成后,刺激器能在100ms内实现脉冲发放,最大输出脉冲幅度为100mA,脉冲各参数相对误差都小于5%。测试结果表明,刺激器各项指标都达到了设计要求,该刺激器也可用于其他需要输出恒流脉冲的场合。     

一款高精度的电流基准电路设计

基于传统的带隙结构,本文提出了一款具有良好温度系数和电源抑制特性(PSR)的电流基准电路。该电路利用二阶温度补偿实现,有效降低了电流的温度系数。其结构简单,可应用于振荡器、运算放大器等电路中。采用0.5μm标准CMOS工艺模型,利用Hspice工具仿真验证。仿真结果表明：当温度在-40℃～150℃变化时,温度系数为111ppm/℃,低频PSR仅为-156 dB。     

并联有源滤波器的最优电压滞环电流控制

简要介绍了并联有源滤波器的原理其普通滞环电流控制的特点，针对普通滞环电流控制方法的不足，提出并详细分析了一种最优电压滞环电流控制新方法，该方法的显著特点是通过识别参考电压矢量知电流误差矢量的区域控制滤波器的输出，避免了复杂计算和逆变器不必要的开关，并且快速，准确，从而改善了有源滤波器的性能。     

48kW高频开关电源的研制

主要介绍了48kW大功率高频开关电源的研制。介绍了国内外开关电源的现状,分析了全桥移相变换器的工作原理和软开关技术的实现,软开关能降低开关损耗,提高电路效率。给出了电源系统的整体设计及主要器件的选择。试验结果表明,该装置完全满足了设计要求,并成功地应用于电镀生产线上。     

Microprocessor-controlled current transformer-based power supply

The basic relations under charging and discharging of a capacitor that accumulates energy from a current transformer are analyzed. The capacitor and the current transformer, together with a step-up switching regulator, constitute the power supply of an autonomous sensor installed on a high-voltage transmission line wire. The processes of charging and discharging the capacitor are controlled by the microcontroller of the sensor.