基于DSP的TSF控制器串行通信设计

为了满足电力电子装置日益复杂的功能要求,DSP(数字信号处理器)在其控制器中的应用日益普遍.介绍了利用TMS320F28335DSP芯片的SCI(串行通信接口)模块实现适用于RS-485总线的TSF(晶闸管投切滤波器)控制器串行数据通信方案,并使用VC+ +开发了相应的上位机软件.该方案可应用于多种基于DSP的电力电子控制装置与上位机间的数据交换.在实际环境下运行表明该方案简单有效、移植方便,具有较强的实用性.     

基于DSP的电网谐波检测系统的设计与实现

随着我国经济与社会的快速发展,电力工业的日益壮大,电力系统谐波已经成为电力领域日益重要的研究课题。谐波检测是解决其他谐波相关问题的基础和重要依据,因此进行谐波检测的研究具有重要的理论和实践意义。本设计以基2-FFT算法为基础,在以DSP芯片(TMS320F28335)为核心的控制器上实现256点F FT运算。系统硬件部分主要由电源转换电路、信号转换与调理电路、DSP控制器模块与液晶显示组成,实现对电网谐波的测量与显示。     

基于DSP的UPF谐波电流检测系统误差研究

从谐波电流检测原理、交流采样方法和硬件实现方案等方面,研究了基于DSP的UPF谐波电流检测系统的误差,分析了各项主要误差的产生原因及量级大小,并提出了相应的减小或修正误差的改进方法,以提高谐波电流的检测精度.这些方法已在基于DSP的并联型有源电力滤波器实验装置上得以应用.结论亦可为它类有源电力滤波器的设计提供参考.     

基于TMS320F28335的永磁同步电动机控制器的设计

针对永磁同步电机（PMSM）具有结构简单、效率高、功率因数高等优点,研究和设计了一款以浮点型TMS320F28335数字信号处理器（DSP）为控制核心的永磁同步电机控制器。该控制器设计了三相全控桥式功率驱动电路和过流、欠压检测,温度监控等检测保护电路。能通过CAN总线连接外部显示模块以及RS232通信接口与上位机的高速通信并进行实时数据交换,软件部分采用空间矢量算法实现电流、速度和位置的精确控制。实验结果表明,控制器精度高、响应快、控制效果稳定。     

一种便携式发电箱的设计

在外旅游或者没有电源的情况下,便携式光伏发电箱可以实现手机、手电筒、剃须刀等能量补给及夜晚照明。文章主要介绍了光伏发电箱的太阳能发电系统,该系统由光伏电池、蓄电池、控制器、逆变器、数据采集板、上位机等几部分组成;文中对该系统各部分的功能和相互联系进行了分析;重点叙述逆变器的设计,包括电路结构、DSP软件的设计、PWM波形的产生原理;通过数据采集板和上位机可实时监测系统的运行状况,具有一定的市场潜力。     

基于DSP和小波变换的电压暂态扰动在线监测方法研究

设计了一款基于DSP2812的电压暂态扰动在线检测装置,研究了基于DSP和小波变换的电压暂态扰动在线检测方法。该装置通过霍尔传感器和模数转换芯片采集电信号,以高性能数字信号处理芯片TMS320F2812为核心信息处理单元,完成了DSP及其外围电路设计。采用小波变换在线检测电压暂态扰动,并在DSP中实现了小波算法,软件还包括主程序模块、A/D采集模块、中断模块、上位机处理模块和通讯模块等设计。实验首先在Matlab中进行了仿真实验,选取合适的小波函数,利用Matlab中的DB4小波对扰动进行定位;然后再利用信号发生器产生包含暂态扰动的信号,采用该文研制的装置进行了在线扰动定位。利用DSP 强大的运算性能和高效的小波算法,能实现电量采集和电压暂态扰动的实时分析同步进行。实验表明：该装置精度高,数据处理速度快,可实现电压暂态扰动的实时检测。     

BLDCM伺服系统的RS-485通信控制与监测

研究并实现了基于DSP和CPLD的无刷直流电动机（BLDCM）全数字伺服控制器与其上位机控制软件之间的RS-485串口通信。电动机按上位机给定指令作动;上位机软件采用虚拟仪器LabVIEW编写,界面友好,具有发送控制指令,将位移、电流等反馈数据显示、保存和制表的功能。实验结果证明系统具有良好的伺服性和实时可监测性。     

基于DSP和小波变换的电压暂态扰动在线检测方法研究

设计了一款基于DSP2812的电压暂态扰动在线检测装置,研究了基于DSP和小波变换的电压暂态扰动在线检测方法。该装置通过霍尔传感器和模数转换芯片采集电信号,以高性能数字信号处理芯片TMS320F2812为核心信息处理单元,完成了DSP及其外围电路设计。采用小波变换在线检测电压暂态扰动,并在DSP中实现了小波算法,软件还包括主程序模块、A/D采集模块、中断模块、上位机处理模块和通讯模块等设计。实验首先在Matlab中进行了仿真实验,选取合适的小波函数,利用Matlab中的DB4小波对扰动进行定位;然后再利用信号发生器产生包含暂态扰动的信号,采用该文研制的装置进行了在线扰动定位。利用DSP强大的运算性能和高效的小波算法,能实现电量采集和电压暂态扰动的实时分析同步进行。实验表明:该装置精度高,数据处理速度快,可实现电压暂态扰动的实时检测。     

基于DSP、FPGA与CAN总线的跟踪控制器设计

DSP和FPGA组成的伺服控制系统能够满足复杂的控制算法要求。通过对TI公司的DSP控制芯片和ALTERA公司的FPGA芯片的功能和特点分析,结合CAN总线与上位机通信,设计了一种基于DSP、FPGA与CAN总线的跟踪控制器。给出了该控制器的功能和硬件结构,以及软件流程设计。重点介绍了该控制器的硬件资源选择,工作原理,基本功能模块构成及算法实现。该控制器能够满足高速跟踪的伺服系统在实时性、精确度和稳定性上的高要求,具有良好的功能扩展能力。     

低电压输出直流电源的测试老化系统

针对KJ90N系列矿井安全监控系统中本安型直流电源的测试老化问题，设计了一种在线测试老化系统。该系统包括上位机、中位机及测试单元等组成部分，是基于16位DSP技术的中位机硬件设计、C#.NET技术的上位机软件开发，完成的一套自动化的测试老化装置。该系统具有自动加载负载、信号采集、输出保护、过温保护、数据存储和分析等多项功能。结果表明该系统实现了自动测试老化功能。对于其他低电压电源产品的测试老化有较好的借鉴作用。     

并联有源电力滤波器控制系统的设计与优化

针对三相三线系统和电网电压畸变及不对称的问题,研究了一种新型的三相锁相环的谐波检测方法。为了更好的减小跟踪误差,设计开发了一种模糊PI自适应控制器,通过在线整定也可以起到减小稳态误差的效果。研究内容基于并联有源电力滤波器(SAPF)的工作原理展开,该设计采用了基于DSP与FPGA的硬件设计以及双DSP的软件控制系统,通过搭建380V/150A的三相全桥结构SAPF实验装置,对控制策略的正确性和设计的有效性进行了验证。     

基于Matlab的电力电子技术仿真平台设计

"电力电子技术"是一门交叉性综合性课程,知识面广,信息量大,在有限的学时内用传统的教学方法去授课,教学效果不是很理想。本文基于Simulink和图形用户界面GUI构建了电子电子技术仿真平台,在建模仿真的过程中将抽象的理论知识变成直观的感性认识,可使学生能更直观、高效地理解和掌握所学知识,培养学生的学习兴趣和能力,并最大限度地提高单位学时的信息量,提高了教学质量。     

Adaptive repetitive control of PWM inverters for very low THDAC-voltage regulation with unknown loads

An adaptive repetitive control scheme is proposed and applied to the control of a pulsewidth-modulated (PWM) inverter used in a high-performance AC power supply. The proposed control scheme can adaptively eliminate periodic distortions caused by unknown periodic load disturbances in an AC power supply. The proposed adaptive repetitive controller consists of a voltage regulator using state feedback control, a repetitive controller with tuning parameters and an adaptive controller with a recursive least-squares estimator (LSE). This adaptive repetitive controller designed for AC voltage regulation has been realized using a single-chip digital signal processor (DSP) TMS320C14 from Texas Instruments. Experimental verification has been carried out on a 2 kVA PWM inverter. Simulation and experimental results show that the DSP-based adaptive repetitive controller can achieve both good dynamic response and low total harmonic distortion (THD) under large-load disturbances and uncertainties     

A Single-Phase Voltage-Controlled Grid-Connected Photovoltaic System With Power Quality Conditioner Functionality

Future ancillary services provided by photovoltaic (PV) systems could facilitate their penetration in power systems. In addition, low-power PV systems can be designed to improve the power quality. This paper presents a single-phase PV system that provides grid voltage support and compensation of harmonic distortion at the point of common coupling thanks to a repetitive controller. The power provided by the PV panels is controlled by a Maximum Power Point Tracking algorithm based on the incremental conductance method specifically modified to control the phase of the PV inverter voltage. Simulation and experimental results validate the presented solution.     

Embedded power supply for low-power DSP

The use of dynamically adjustable power supplies as a method to lower power dissipation in DSP is analyzed. Power can be reduced substantially without sacrificing performance in fixed-throughput applications by slowing the clock and lowering supply voltage instead of idling when computational workload varies. This can yield a typical power savings of 30-50%. If latency can be tolerated, buffering data and averaging processing rate can yield power reductions of an order of magnitude in some applications. Continuous variation of the supply voltage can be approximated by very crude quantization and dithering: a four-level controller is sufficient to get within a few percent of the optimal power savings. Significant savings are possible only if the voltage can be changed on the same time scale as the variations in workload. A chip has been fabricated and tested to verify the closed-loop functionality of a variable voltage system. The controller takes only 0.4 mm² and draws a maximum of 1 mW at 2 V with a 40 MHz clock. The control framework developed is applicable to generic DSP applications     

CCM模式下交错式APFC的研究与实现

叙述了电力系统谐波的产生原因及功率因数校正的重要性,介绍了传统有源功率因数校正的原理,提出了CCM模式下交错式有源功率因数校正的方法。采用德州仪器公司单芯片双相交错式UCC28070作为控制器件,实现功率因数校正,大大减少了电流谐波,提高了输入端的功率因数。     

A Universal Vector Controller for Four-Quadrant Three-Phase Power Converters

Power factor corrected (PFC) rectifiers, active power filters (APFs), static VAR compensators (STATCOM), and grid-connected inverters (GCI) are indispensable elements in distributed generation power systems. PFC rectifiers are essential for load side harmonic and reactive power correction, APFs can suppress the harmonics generated by nonlinear loads or sources, STATCOMs can control the power flow in the grid, while GCIs are the key elements bridging the renewable energy sources and the power grid. Previous theory and experiments have demonstrated that one-cycle control is capable of controlling all above mentioned three-phase converters, featuring excellent performance, simple circuitry, and low cost. This paper further unifies the control key equations for the previously mentioned converters, which results in a universal solution that realizes all these functions with a same controller. The concept has been verified by a 1-kVA prototype and supported by a series of experimental results     

Dielectric slow-wave structures for the generation of power at millimeter and submillimeter wavelengths

Several new types of coupling structures, designed to extract energy from a megavolt electron beam at a harmonic of the frequency used to modulate the beam current, are considered. In particular, the advantages of a slow-wave device over a right cylindrical cavity are indicated. The slow-wave coupling device may be resonant or nonresonant; the latter corresponds to a Cerenkov radiator. Power measurements at the twelfth harmonic of the fundamental modulating frequency provide good correlation with the theoretical power output expected. The design of a submillimeter coupling device is described, and the theoretical pulsed power obtainable is shown to be at the milliwatt level for a harmonic current density of 74 ma/cm².     

DSP-based active power filter with predictive current control

This paper presents an active power filter based on a digital signal processing (DSP) controller with enhanced current control performance. A novel predictive current control method is introduced to compensate the phase error of harmonic components caused by discrete sampling and finite nonnegligible execution time delay. The concept of average current control is also introduced that is adequate for digital current control. With a close coordination between the reference current prediction, PWM pattern generation, and control timing, a high performance control is achieved. Experimental results show that the developed system gives satisfactory performance in harmonic and reactive power compensation