SA4828在单相感应电动机调速中的应用

PWM(pulsewidthmodulation)是实现电动机调速的关键技术 ,介绍了PWM发生器SA4 82 8的基本特点 ,着重论述了利用SA4 82 8实现单相异步电动机线性调速的关键技术、软件及硬件的设计。     

SA4828在单相感应电动机调速中的应用

PWM(pulse width modulation)是实现电动机调速的关键技术,介绍了PWM发生器SA4828的基本特点,着重论述了利用SA4828实现单相异步电动机线性调速的关键技术、软件及硬件的设计.     

新型三相脉宽调制发生器——SA4828集成芯片及其应用

介绍了三相脉宽调制发生器SA4 82 8的工作原理和使用方法 ,给出了与 80C1 96KC微处理器接口的硬件电路和软件程序。实践表明 :采用SA4 82 8芯片设计的系统具有电路结构简单 ,可靠性高 ,使用灵活 ,适应性强等优点。具有推广应用的前景。     

Cirrus Logic推出高电流峰值的IC驱动电路

2008年10月20日,Cirrus Logic公司宣布推出可实现电流峰值17 A且为脉宽调制(PWM)输出的IC Apex Precision PowerTM SA306-IHZ和SA57-IHZ,应用于直流电动机驱动市场.     

基于PWM控制的无刷直流电动机设计分析

针对常规无刷直流电动机设计方法存在的不足,通过对工作在PWM控制模式时无刷直流电动机电流的分析计算,区分了母线电流和电枢相电流的不同,指出无刷直流电动机的设计应主要依据电枢相电流,并提出一种PWM控制方式下无刷直流电动机设计的方法。样机实验结果表明,该方法显著提高了无刷直流电动机设计的准确性,验证了该方法的有效性和可行性。     

异步电动机双PWM传动系统数字化实现

基于双PWM技术的异步电动机传动系统以4象限工作、网侧电流近似正弦和功率因数可控等特性受到广泛关注.对系统的整流器采用双闭环矢量控制策略、异步电动机采用VVVF控制,设计了系统的硬件电路和软件,完成了系统基于DSP的数字化实现.实验结果证实了所设计的双PWM系统不仅能正常运行,而且各性能指标均符合要求.     

《电气传动》一九八七年 目次

综述 期号电气控制技术及其发展展望1直流PWM技术的发展2 交流传动新型矢量坐标变换电路3异步电机变频调速的强磁定同控制4微机矢最控制PWM变频调速系统三相PWM波形的 实时计算‘一种新的异步电动机矢盈控制系统线性化动态结构图5用晶体管斩波器控制转子电阻的感应电动机双闭环调 速系统.转差频率控制电流变频器一异步电动机稳速系统6CSIM交流传动系统的矢量控制参数设计方法4数字锁相环用于异步电动机电轴系统的理论探讨4自沁波式串激无换向器调速系统2高效率抑制PWM逆变器谐波的梯形调制信号6交交变频器动态小环流控制2带短路圈的…     

无刷直流电机调速控制系统的研制

本文设计了一种基于STM8s105k4单片机的无刷直流电机调速控制系统,STM8s105k4单片机包括DS P中对电机控制所必须的占空比可调PWM功能等.因为其价格比DSP要便宜很多,这对于小功率无刷直流电机的控制STM8s105k4足以胜任,能够为小功率无刷直流电动机的产品在达到性能要求的同时降低生产成本.     

EDA技术在步进电动机驱动中的应用

介绍一种采用EDA技术输出PWM控制信号,对步进电动机细分驱动的实现方法.利用FPGA中的嵌入式EAB构成LPM_ROM,存放步进电动机各相细分电流所需的PWM控制波形数据表.并通过FPGA设计的数字比较器,同步产生多路PWM电流波形,实现对四相步进电动机转角进行均匀细分控制.该设计简化了外围电路,控制精度高、控制效果好.     

Cirrus Logic推出高电流峰值的IC驱动电路

2008年lO月20日,CirrusLogic公司宣布推出可实现电流峰值17A且为脉宽调制（PWM）输出的IC Apex Precision Power^TM SA306-IHZ和SA57-IHZ,应用于直流电动机驱动市场。随着该系列产品的推出,设计师第一次能够选择单个封装的解决方案,利用9～60V的电源电压驱动三相无刷直流电机或有刷直流电机。     

基于SA4828的变频器设计

利用专用集成电路SA 4828设计变频器,可以大大简化硬件电路的设计和软件编程。它以SA 4828作为SPWM信号发生器,经过驱动电路控制IPM模块,产生三相变频电源。配以单片机、键盘、LED显示器及转速编码器,构成闭环调速系统。经过实际测试,取得了很好的效果。电动机可以在1~50 H z范围内连续调速,闭环调速精度达到0.1%。实践表明,利用SA 4828设计变频器,是切实可行的简便方法。     

Sensorless induction spindle motor drive using fuzzy neural network speed controller

A sensorless induction spindle motor drive using synchronous PWM and dead-time compensator with fuzzy neural network (FNN) speed controller is proposed in this study for advanced spindle motor applications. First, the operating principles of a new type synchronous PWM technique are described in detail. Then, a speed observer based on the model reference adaptive system (MRAS) theory is adopted to estimate the rotor speed. To increase the accuracy of the estimated speed, the speed estimation algorithm is implemented using a digital signal processor. Moreover, since the control characteristics and motor parameters for high speed operated induction spindle motor drive are time-varying, an FNN speed controller is developed to reduce the influence of parameter uncertainties and external disturbances. In addition, the FNN is trained on-line using a delta adaptation law. Finally, the performance of the proposed sensorless induction spindle motor drive system is demonstrated using some simulation and experimental results.     

SA4828仿复用总线板坯电磁搅拌控制系统设计

为了节约单片机端口,SA4828芯片与P87LPC767单片机采用仿复用总线模式相连构成了板坯电磁搅拌器控制系统。SPWM脉冲由SA4828芯片产生,波形参数由单片机设定。系统利用SA4828芯片的单相电压幅值可调功能,产生相位相差90°、频率和强度可控的线电流,满足了板坯电磁搅拌的工艺要求。由于板坯电磁搅拌工作频率低,P87LPC767采用内部振荡信号,SA4828振荡信号由P87LPC767的ALE信号提供,简化了电路,增加了可靠性。     

Using corona inception voltage for motor evaluation

Failures of the interturn insulation system of induction motors fed by PWM variable speed controllers have plagued the industry since the introduction of fast-switching, IGBT-based drives. The majority of these failures are attributed to high voltage stresses imposed upon the motor by the drive. Here, the author describes how the corona inception voltage can be used for evaluating the state of variable speed induction motor drive insulation     

基于DSP控制的多相交流电机变频调速系统

多相电机调速系统可以将传统三相电机的控制方法和极相调制模式结合起来,使电机转矩/转速范围得到扩展.为此,以9绕组极相调制感应电机为对象,建立了其数学模型,研究了其极相变换控制.以TMS320LF2407A为处理器,用XC95288XL扩展PWM信号通道,构建了极相调制感应电机控制系统,实验结果验证了该系统.     

Optimal common-mode voltage reduction PWM technique for inverter control with consideration of the dead-time effects-part II: applications to IM drives with diode front end

The main theme of this paper is to demonstrate the applications of the newly developed common-mode voltage reduction pulsewidth-modulation (PWM) technique, which restricts the common-mode voltage to one-third of DC-link voltage, to vector-controlled induction motor drives. As compared to previous common-mode voltage reduction techniques, the presented technique can be applied to the inverter with diode front end and has no adverse effect on the linear modulation range. Therefore, vector-controlled drives using the developed technique for inverter control have a wide speed range. Moreover, the effects of the common-mode voltage reduction PWM technique on speed response for vector-controlled induction motor drives will be fully investigated in this paper. It will be demonstrated by intensive experimental results that speed performance does not deteriorate significantly within the rated speed range.     

FPGA based on-line Artificial Neural Network Selective Harmonic Elimination PWM technique

During the last decade, many interests were given to the speed control of induction motor based electrical vehicles (EVs). The calculated Pulse Width Modulation technique with Selective Harmonic Elimination and Voltage Control (SHE PWM) is an attractive alternative for speed control of an induction motor. However, its application is unfeasible in real time application, as in EVs, because the switching angles cannot be calculated and then generated online. To overcome this problem, this paper proposes a new online PWM algorithm based on the Artificial Neural Network (ANN) theory in combination with the SHE PWM. In this paper, the proposed ANNSHE PWM algorithm is first described and simulated. Then, an extensive angle error analysis is carried out in order to check the accuracy of this algorithm. Finally, an FPGA implementation of the proposed algorithm to generate the switching angles is presented in order to validate this algorithm on a real time application. The results obtained shows that the proposed ANNSHE PWM algorithm controls the fundamental voltage and eliminates efficiently the desired harmonics in real time and in the whole range of speed variation.     

锁相环在PWM变频调速系统中的应用

本文把锁相环技术与PWM变频调速系统相结合 ,建立了PLL交流调速系统 ,该系统可达到较高的速度控制精确度 ,具有较好的应用价值     

电压型逆变器供电三相异步电机瞬态过程仿真

本文分析了6阶梯波和脉宽调制两种电压型逆变器供电时异步电机的调速运行。异步电机采用相对定子静止的坐标系描述的数学模型。分别计算了电机带恒转矩负载和风机类负载时的运行状况。