基于71M6513的低压无功补偿控制器设计

传统无功补偿控制器普遍采用ADC MCU模式来测量电网电压、电流,计算有功、无功、功率因素等参数,具有硬件设计复杂、软件编程量大、抗干扰能力差等缺点.本文提出了基于TDK 71M6513的智能化低压无功补偿控制器,该控制器集成电网电压、电流参数采集,无功、有功、功率因素等参数计量,数据管理与输出控制于一体.本文给出了控制器的结构组成与工作原理、各单元模块电路以及系统软件流程设计,并对控制器实际工作性能进行了测试与结果分析.     

A novel yield optimization technique for digital CMOS circuits design by means of process parameters run-time estimation and body bias active control

This work presents a novel approach to optimize digital integrated circuits yield referring to speed, dynamic power and leakage power constraints. The method is based on process parameter estimation circuits and active control of body bias performed by an on-chip digital controller. The associated design flow allows us to quantitatively predict the impact of the method on the expected yield in a specific design. We present the architecture scheme, the theoretical foundation, the estimation circuits used, and two application case studies, referring to an industrial 0.13-/spl mu/m CMOS process data. The approach results to be remarkably effective at high operating temperature. In the presented case study, initial yields below 14% are improved to 86% by using a single controller and a single set of estimation circuits per die.     

一种新型CCM PFC控制器ICE1PCS01及其典型电路的设计

介绍了一种新型的CCMPFC控制器ICE1PCS01，分析了其工作原理和基本功能，并且对其典型应用电路，特别是控制器外围电路的设计原则和方式，进行了详细的分析、设计和计算。所设计的基于CCMPFC控制器ICE1PCS01的应用电路，在保证了功率因数和谐波分量达到要求的前提下，大大降低了PFC变换器的设计成本，在中小功率场合下低成本的PFC电路中有广阔的应用前景。     

An adaptive digital controller for a unity power factor converter

This paper describes an adaptive digital controller for a unity power factor AC-DC power converter. The controller is based on a linear large-signal model of the boost power converter. A hardware design is presented and analyzed, followed by the software implementation of the control algorithm. Issues in digital control of power converters, such as quantization effects and fixed-point representation of system parameters, are examined in the context of this system. Experimental results are presented and compared with simulations     

一种高功率因数电源的设计与实现

介绍以CCM模式的功率因数校正（PFC）控制器UCC28019为核心的高功率因数电源设计。论述其基本原理及软硬件实现。采用PWM调制技术使输出电压数字可调,通过闭环反馈调节使电源功率因数达到98％以上。以MSP430F449为控制和运算核心,实时显示当前电源参数。该系统可有效地抑制电流谐波,校正功率因数,达到较好的性能指标,具有一定实用性。     

新型低压无功补偿器的设计

主要介绍了基于ATT7022B和ST-SRC或ST-SRCS-4智能开关的新型无功补偿统。该控制器通过高精度多功能三相电能专用计量芯片ATT7022B实时检测电网的电压、电流、功率因数、无功电流和无功功率,并有CAN总线通信接口。ST-SRC或ST-SRCS-4智能开关可在电压或电流过零点时动作,并可以通过CAN总线接口与和无功补偿控制器进行通信,最终使电容器组按一定的规律进行投切,最终实现无功补偿。     

基于ATT7022A的无功补偿控制器设计

以三相电能专用计量芯片ATT7022A和一种高性能低功耗的AVR单片机atmega128为核心,设计一种无功补偿控制器。该控制器能实时测量电网的电流电压值、有功功率、无功功率、功率因数等参数,根据实际情况,准确的控制电容器的投切,能有效的提高线路功率因数、较少损耗,改善电网质量。     

Power factor correction converter using delay control

A low cost universal input voltage single-controller power factor correction converter for a 200 W power supply is proposed. It consists of the PFC part followed by a DC-DC converter as in a conventional two-stage scheme. However a single PWM controller is used as in a single-stage PFC scheme. The switch in the PFC part is synchronized with the switch in the DC-DC converter and has a fixed frequency. Employing an adaptive delay scheme, the PPC switch is controlled to limit the capacitor voltage within a desired range for optimum efficiency and to reduce input current harmonic distortion. The design procedures of the delay scheme, the feedback loop, and experimented results are presented to verify the performance     

A simplified analog controller for power factor correctionconverters

To improve power factor and to meet IEC 555-2 harmonic requirements, input power factor correction circuits have been used, widely, in the power supply industry. In response to the trend, this study proposes and investigates a simple controller for a single-phase AC to DC rectifier with input power factor correction     

An Improved Single Stage Phase Shifted Control Based AC–DC PFC Converter for Wireless Applications

Recently, many researchers has more attention in a single stage AC to DC converter features and DC to DC regulator are extensively used into low power applications. When compared with the two stage conventional method over the Single stage converter has a simple design and utilize only less components. Therefore, this task has been used in this paper as a prposed work of AC–DC single stage converters combine a converter front end with DC–DC back end converter. This proposed work has been improved single stage power factor correction (PFC) converter based on phase-shifted controller for wireless Power applications. The proposed technique employed to develop the improved converter for task of an extensive series of voltage outputs with rippleless outcomes in low frequency, that shows the high essential in battery application and the PFC duty ratio restriction is eradicated. Similarly, DC–DC stage operation are designed in a related way of conventional full bridge phase shifted converter. Accordingly, the proposed technique of improved converter of this paper will achieves better efficiency compared with other conventional techniques and it has been prove more efficient for many Industrial applications, it has been discussed in result section clearly. The experimental results of proposed improved converter proves that it is potential to extend high power single stage converter with good power factor, conversion characteristics and efficiency.

     

基于STM32F407的永磁同步电机伺服控制器设计

首先介绍了永磁同步电机伺服控制器的基本功能及控制原理,并以STM32F407为基础进行了小功率的伺服控制器设计,详细讲述了伺服控制器的软、硬件的具体设计流程及其实现方式。并通过意法半导体公司提供的相关软件设计工具快速、有效地完成伺服控制器的设计、调试。     

A low frequency AC to high frequency AC inverter with build-in power factor correction and soft-switching

This paper presents a full bridge AC-AC inverter for high frequency power distribution system with power factor correction stage controlled by a unified controller. The proposed inverter has the following features: 1) load independent output voltage with constant frequency and very low total harmonic distortion (THD); 2) soft switching of the full bridge switches for a wide range of input voltage and load conditions; 3) low DC bus voltage; 4) simple control and cost effectiveness for the power factor correction stage. Operating principles and performance characteristics are presented, and guidance to design the converter is given. Experimental results of a 90-265V/sub ac/ input, 30 V/sub ac/ output at 100 kHz, 250 W laboratory prototype are given to verify the theoretical and simulation results. The proposed ac-ac inverter is attractive for low power (up to 250 W) high frequency applications.     

小功率单相智能变频器的设计

本文介绍了一种低成本小功率单相变频器的设计思路。它采用交流单相电机智能控制电路ML4421及一些电容电阻做控制回路，智能功率模块IPM做逆变功率驱动回路，具有线路简单，无需软件开发，成本低等优点。     

A Simple Analog Controller for Single-Phase Half-Bridge Rectifier

A simple analog controller is proposed for the single-phase half-bridge pulsewidth modulation rectifier to maintain near unity power factor at the input and balance the voltages across each half of the dc bus. The controller works in the principle of constant-frequency current programmed control. The required gating pulses are generated by comparing the input current with a linear and bipolar carrier without sensing the input voltage. Two voltage controllers and a single reset-integrator are used to generate the carrier. All the necessary control operations are performed without using any phase locked loop, multiplier, and/or divider circuits. Resistor based sensors are used to measure the voltages across two halves of the dc bus and the input current. The controller can be fabricated as a single integrated circuit. The averaged small signal models and all the necessary design equations are provided. The condition of stability against subharmonic oscillation is analyzed. Calculation of switching and conduction losses is presented. The control concept is validated through simulation and also experimentally on an 800-W half-bridge rectifier. Experimental results are presented for ac-dc application, and also for ac-dc-ac application with both linear and nonlinear loads at two different output fundamental frequencies (50 and 60Hz)     

数控直流稳压电源设计

常规线性稳压电源中,调整元件串联在负载回路,其作用就像一只可变电阻,输入电压或负载变化时,串联调整元件的压降改变,从而使输出电压稳定不变。当输入电压过高时,串联调整管的功耗很大,因此效率很低。为了解决常规线性电源采用滑动电阻调节方式所带来的低效率问题,通过采用数字控制的方法,使线性电源的效率最大化。该设计利用STC12C5410AD单片机输出PWM控制三端稳压器,实际带载测试在输入电压波动范围为±20%的情况下,效率达到了50%的结果,证明数控型电源具有工作稳定,电压调节精度高,纹波系数小,效率高于常规线性电源的特点。     

基于DSP的单级式光伏并网逆变器的数字控制系统设计

单级式光伏并网逆变器具有转换效率高、体积小、成本低等优点,但在控制实现上却较为复杂,对太阳能电池的最大功率跟踪和输出电流正弦度及单位功率因素化的控制目标须同时得到保证。结合单同步坐标系软件锁相环和空间矢量脉宽调制算法,详细地阐述了数字控制系统的设计,针对其中的电压电流双闭环控制结构和前馈解耦控制策略进行着重分析。搭建光伏并网逆变器实验平台,采用TMS320F2812数字信号处理器作为核心芯片对数字控制系统加以实现,实验结果表明控制系统具有较高的控制精度和较好的控制性能。     

LT1778应用电路设计

随着电子技术的迅猛发展,单板电路正常工作所要求的电源种类越来越多,功耗越来越大,这就向产品电源系统的设计师提出了新的挑战。目前,开关电源已越来越多的用于单板电路供电。文中介绍了Linear公司的开关管控制器LT1778的工作原理、设计方法及PCB布线要点,并给出实例供有关的设计人员参考。     

自动气象站光伏控制器的设计

为解决自动气象站独立光伏供电系统充电效率低、输出单一的问题,同时提高电源的使用效率。在此利用bq24610芯片和ATmega16L单片机设计了一款具有输出±12V的新型光伏控制器。该控制器实时检测蓄电池端电压,采用合理并精确的充放电控制策略对蓄电池进行充放电,同时还具有过充过放保护、防反充保护功能,有效地保护了蓄电池和延长了蓄电池的使用寿命。通过实验测试和实际应用,验证了该控制器的设计合理性和系统稳定性。     

Performance analysis of a PWM inverter VAr compensator

The performance of a three-phase solid-state reactive power compensator with fast dynamic response is analyzed. The compensator consists of a three-phase pulse-width modulated voltage-source inverter connected to a self-controlled DC bus. The principal advantage of this scheme is that it can maintain a near-unity source power factor without sensing and computation of the associated reactive power component. A mathematical model for the compensator connected across a variable power factor load is derived. The frequency response is obtained for open-loop operation. This allows the design of the controller. Predicted results are verified experimentally for both open and closed-loop responses     

Single chip integration for motor drive converters with power factor capability

In this paper, an innovative converter topology is presented that allows to improve the performance of electronically commutated motor drives, aimed to equip home appliances. The proposed topology is based on a modified C-dump converter configuration, where the energy recovery stage acts as an active power factor controller (PFC) for offline operation. This is made possible by introducing a new technique to manage the free-wheeling energy that is recovered back to the dc bus by a suitable high frequency (HF) transformer. The proposed approach allows to omit the PFC stage that is included in motor drives devoted to home appliance applications in order to comply with power quality requirements. Moreover, the proposed converter topology features only low side or high side configuration switches, allowing to simplify the design of the drive and easily integrate the power semiconductors in a single chip exploiting smart power technologies. Simulations and experimental results confirm the validity of the proposed approach.