带MPPT控制的光伏充电控制器的设计

本文设计了一种具有MPPT控制的光伏发电充电控制器。该控制器通过检测蓄电池充电电压、充电电流的大小,智能选择充电器的工作状态,并在光照强度不足时自动切换到光伏发电最大功率点跟踪控制MPPT状态,采用扰动控制策略使光伏电池有最大的功率输出,使控制器有较好的充电效率。实验结果较好地说明所设计控制器的有效性。     

基于Buck拓扑的光伏充电控制器设计

介绍了一种基于Buck拓扑的光伏充电控制器,以PIC16F1829为主控MCU,实现具有MPPT和恒压充电的分段充电功能,实验结果表明,该充电控制器可充分利用太阳能电池板,具有较高的工作效率。     

基于电流控制的光伏太阳能充电器系统研究

提出一种基于电流控制的最大功率点跟踪方法用于光伏太阳能充电器,以DC/DC变换器中的Boost电路作为开关充电器,系统由一个光伏电池模块、一个基于Boost变换器开关电池充电器和电池组成.采用光伏电池输出电流控制实现系统的最大功率点跟踪,调整占空比,从而使太阳电池阵列输出功率最大,以输出稳定的电压对蓄电池进行充电,可以提高蓄电池使用寿命,有效地提高独立光伏系统的综合效率,降低整个系统的成本.     

A fuzzy-logic-controlled single-stage converter for PV-poweredlighting system applications

This paper presents a fuzzy-logic-controlled single-stage power converter (SSC) for photovoltaic (PV)-powered lighting system applications. The SSC is the integration of a bidirectional buck-boost charger/discharger and a class-D series resonant parallel loaded inverter. The designed fuzzy logic controller (FLC) can control both the charging and discharging current, and can improve its dynamic and steady-state performance. Furthermore, a maximum power point tracker (MPPT) based on a perturb-and-observe method is also realized to effectively draw power from PV arrays. Both the FLC and the MPPT are implemented on a single-chip microprocessor. Simulated and experimental results obtained from the proposed circuit with an FLC have verified the adaptivity, robustness and feasibility     

基于LT3652的太阳能充电器设计方法

基于太阳能充电器需求的不断增加,采用LT3652电池充电管理芯片设计了一种多功能太阳能充电器。在详细介绍LT3652输入电压调节环路及该芯片的其他功能的基础上,针对设计过程中涉及的元器件选型,PCB布线注意事项作了详细介绍。同时对如何设计更具有生命力和适应性的充电器产品给出了建议。笔者设计的太阳能充电器可实现对光伏电池...     

小型风光互补控制策略研究

文中通过对比风光互补系统各种常用最大功率点跟踪（MPPT）控制策略,提出了改进的MPPT控制策略。光伏电池阵列输出功率通过电压反馈扰动MPPT控制策略进行控制,风力发电机输出的功率采用变步长扰动MPPT控制策略;在蓄电池支路上串联一个MOSFET管,起到截止充电功能,并提出了改进的三段式充电方法。     

High-performance online UPS using three-leg-type converter

A high-performance single-phase online uninterruptible power supply (UPS) is proposed. The UPS is composed of a three-leg-type converter which operates as a battery charger and an inverter. The first leg is controlled to charge the battery, and the third leg is controlled to make the output voltage. The common leg is controlled in line frequency. The charger and the inverter are controlled independently. The charger has the capability of power-factor correction while charging a battery. The inverter regulates output voltage and limits output current under an impulsive load. The three-leg-type converter reduces the number of switching devices. As a result, the system has less power loss and a low-cost structure. In the determination of the charger voltage, the nominal voltage is derived using the feedback linearization concept and then a perturbed voltage is determined for the reactive power control. The disturbance of input voltage is detected using a fast sensing technique of the input voltage. Experimental results obtained with a 3-VA prototype show a normal efficiency of over 87% and an input power factor of over 99%.     

宽电压输入智能光伏充电控制系统

设计一款具有最大功率点追踪功能的宽电压输入智能光伏充电控制系统。系统采用恒压法和小步长扰动观察法相结合的方式,实现最大功率点的跟踪控制,通过对充电电压、充电电流及蓄电池表面温度的检测,智能地选择快速脉冲充电、浮充充电、自动停止充电等工作模式,使充电过程始终处于安全状态。实际运行结果表明：该系统可在5～26V的输入电压范围内正常工作,充电过程精确可控。     

A Very Simple Control Strategy for Power Factor Correctors Driving High-Brightness LEDs

This paper presents a new control strategy for power factor correctors (PFCs) that are used to drive high-brightness LEDs. This control strategy is extremely simple and is based on the use of a conventional peak-current-mode controller with a suitable selection of the compensation ramp waveform. Neither an analog multiplier nor an input voltage sensor is needed to achieve quasi-sinusoidal line waveforms at nominal conditions and full load. If the converter belongs to the flyback family (flyback, buck–boost, SEPIC, Cuk and Zeta), the line waveform appears notably distorted if the compensation function is a linear ramp, but becomes almost sinusoidal if the linear ramp is substituted by a properly chosen exponential function. The line waveform is slightly distorted when the load varies or when the converter works under either overvoltage or undervoltage conditions. However, the waveform maintains a very high power factor (PF) even under these conditions. Moreover, the line current is cycle-by-cycle-controlled due to the peak-current-mode control, and hence, the input-current feedback loop is extremely fast, thereby allowing this type of control to be used with high-frequency lines (above 400 Hz).      

基于DS2712的USB接口镍氢电池充电器设计

随着USB接口的广泛应用,将其作为小功率消费类电子产品的电池充电电源十分便利,而新产品的不断涌现和USB接口标准的不断进步使电池充电器设计面临着新的机遇与挑战。在此回顾了USB接口和镍氢电池的特性,对比了基于线性稳压源和开关电源原理设计的充电器之间的差异,设计了一种以DS2712为充电控制器,使用USB接口作为电源的镍氢电池充电器。在此设计的USB接口镍氢电池充电器经硬件验证,实现了对一节镍氢电池的快速智能充电功能,充电过程稳定可靠。     

锂电池智能充电器的设计

根据锂电池的原理及特点确定正确的充电模式,利用微控制器对锂电池包的整个充电过程进行智能化管理,在充电过程中实时采集充电电流、电压及温度信息,动态调整充电电流。核心是智能控制系统和功率转换系统,同时兼具智能报警、温度自动调节、实时监测、充电保护等多种功能。实验表明,所设计的智能充电器安全可靠,具有广阔的应用前景。     

A low‐cost photovoltaic emulator for static and dynamic evaluation of photovoltaic power converters and facilities

In testing maximum power point tracking (MPPT) algorithms running on electronic power converters for photovoltaic (PV) applications, either a PV energy source (PV module or PV array) or a PV emulator is required. With a PV emulator, it is possible to control the testing conditions with accuracy so that it is the preferred option. The PV source is modeled as a current source; thus, the emulator has to work as a current source dependent on its output voltage. The proposed emulator is a buck converter with an average current mode control loop, which allows testing the static and dynamic performance of PV facilities up to 3 kW. To validate the concept, the emulator is used to evaluate the MPPT algorithm of a 230‐W experimental microinverter working from a single PV module. Copyright © 2012 John Wiley & Sons, Ltd.     

基于模糊控制的镍氢电池充电器

文中设计了一款智能快速充电器。采用模糊控制原理进行蓄电池的充电控制,确定了模糊控制器的结构和算法,进行了双输入单输出模糊控制器的设计。该充电器以单片机为核心,运用开关电源技术,采用恒流脉冲充电与模糊控制相结合的充电方法,在保证蓄电池循环寿命不受损害的前提下,大大提高了充电速度。     

基于PSpice的光伏并网系统仿真研究

采用DC／DC和DC／AC两级拓扑结构对光伏并网系统进行了研究和设计,采用改进的定电压跟踪法（CVT）实现最大功率点闭环跟踪,并将PWM控制器引入并网逆变中,采用三角波比较方式实现SPWM电压逆变和输出电流的波形跟踪与控制,在电压、电流内环的基础上引入功率外环以实现系统前后级功率平衡和能量管理,采用基于PSpice的光伏电池仿真模型对所设计光伏并网系统进行了仿真。仿真结果表明,基于PSpice的光伏仿真模型能够有效地模拟实际光伏并网系统的行为特征,将PSpice软件用于光伏发电系统的仿真是可行的。     

一种基于复合运放的线性锂离子电池充电器

基于复合运放,设计了一款新颖的线性锂离子电池充电器.该充电器根据锂离子电池充电的特性,采用三阶段充电法,即涓流充电(预处理),恒流充电(快充),恒压充电(充满).仿真结果显示,在4.5 V电源电压下,充电器实现了涓流充电电流80 mA,恒流充电电流800 mA,及恒定电压4.2 V的充电过程.另外,设计中利用充电功率管的栅极寄生电容作为充电环路的补偿电容,节省了芯片成本和面积.     

基于ADP3806的高功率LED驱动电路设计

设计了一种基于ADP3806的高功率发光二极管(LED)的高效驱动电路。ADP3806是一款开关模式电源控制器,拥有双环路恒定电压和恒定电流控制、远程精确电流检测以及关断和可编程可同步开关频率,能提供恒定电流。同时在设计中利用单端原边电感转换器(SEPIC),其可以提供一种可以高于或低于输入电压的输出电压,在适当的占空比下工作,使连续传导模式(CCM)和脉冲宽度调制(PWM)控制变得简单,提高了效率,并且避免由变压器泄漏电感带来的电压尖峰和振铃。从而在需要进行升压和降压转换来同时驱动多个高功率LED的场合,这个设计是非常适合的。     

锂电池组储能的混合动力RTG系统设计

锂电池组与柴油机构成的混合动力起重机系统是港口节能减排的一项重要技术。针对起重机再生制动能量的回收,设计了双向DC-DC变换器来实现锂电池组储能系统的两种工作模式(再生制动模式和锂电池组放电模式);对双向DC-DC变流器升压工作方式设计了双闭环控制器,降压工作方式设计了电流环和电压环两种控制器,并进行了对比,从而实现了对锂电池组储能系统充、放电过程和不同运行模式间切换过程的控制。运用PLECS搭建了系统仿真模型,仿真结果表明,在制动能量回收过程中,采用电压环控制器可以实现较高效率的制动能量回收。     

Fuzzy-controlled Li-ion battery charge system with activestate-of-charge controller

A fuzzy-controlled active state-of-charge controller (FC-ASCC) for improving the charging behavior of a lithium-ion (Li-ion) battery is proposed. The proposed FC-ASCC is designed to replace the general constant-voltage charging mode by two kinds of modes: sense and charge. A fuzzy-controlled algorithm is built with the predicted charger performance to program the charging trajectory faster and to keep the charge operation in a proposed safe-charge area (SCA). A modeling work is conducted for analyzing and describing the Li-ion battery in charging process. A three-dimensional Y-mesh diagram for describing the charging trajectories of the proposed FC charger is simulated. A prototype of a Li-ion battery charger with FC-ASCC is simulated and realized to assess the predicted charging performance. Experiment shows that the charging speed of the proposed FC charger compared with the general one increases about 23% and the charger can safely work in the SCA     

Dual-Module-Based Maximum Power Point Tracking Control of Photovoltaic Systems

The improved maximum power point tracking (MPPT) control method for small-scale dual-module photovoltaic (PV) systems is presented in this paper. With this method, the voltage and current information of each module are shared and utilized for the detection of the maximum-power point (MPP) without measuring power. This approach can be implemented in a simple structure, especially due to the elimination of memory and multiplication devices. The proposed method is verified by a hardware prototype of grid-connected dual-module PV systems with the proposed analog-implemented MPPT controller. In addition, practical issues of the proposed scheme are considered.     

电动汽车铅酸蓄电池智能充电及其策略

为提高电动汽车铅酸蓄电池寿命和续航能力,实现蓄电池高效、快速充电,设计了一种智能充电系统。硬件采用DC/DC正激变换电路实现功率的转换,同时以单片机为智能控制核心,并利用DS18B20采集电池温度。软件上根据蓄电池快速充电原理,提出一种分阶段定电流和正负脉冲相结合的新型充电控制策略。利用模块化设计方法,完成各功能模块设计,以及利用数字 PI算法实现分阶段电流恒定。实验证明,采用新型控制策略的智能充电系统对蓄电池进行充电,减少了充电时间,提高了充电效率。