单相感应电动机调速器设计

PWM波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设计单相异步电动机线性调速器的关键技术、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.     

开关磁阻调速电动机PWM调压调速的实现与分析

以三相6/4结构、四相8/6结构开关磁阻调速电动机(SRD)为研究对象,提出了一种固定导通角PWM调压调速方案,并对此方案进行了详叙的分析,由样机所获取的性能数据,表明PWM调压调速的SRD具有较高的性能价格比。     

《电气传动》1988年总索引

期号致李鹅总理的信洲t·特性·计算 交沈传动异步电机变频调速的控制方式分析(5)、(6)交流电动机变频调速系统直接自适应控制方法的仿真 研究(4)多处理机实现的异步电动机矢t控制系统(4)徽处理机控制的交流电动机矢t控制变频调速系统(1)徽处理机实现的DDC异步电动机矢t控制系统(6)应用电压矢盆轨迹控制原理实现异步机变频调速控制(6)一种新颗的PWM变频控制方案(l)PWM型逆变器的梯形脉宽调制技术(5)高精度SPWM脉宽实时算法与脉宽控制技术(5)橄机控制的交一直一交电流型双边SPWM/准SPWM变频 器的研究(1)带非线性观测器的PWM集成电…     

《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…     

三相开关磁阻调速电动机PWM控制策略研究

本文以三相6/4结构开关磁阻调速电动机为研究对象,提出了一种三相单三拍固定导通角PWM调压调速控制方案,结合样机实践进行了PWM调速斩波策略研究和高速适应性分析,结果表明该控制方案具有良好的高速适应性和优越的性能价格比。     

单片机控制的PWM调速装置的研究

与交流电动机相比,直流电动机结构复杂,成本高,运行维护困难。但是直流电动机具有良好的调速性能、较大的起动转矩和过载能力强等许多优点,因此在许多行业中仍得到了广泛的应用。文章介绍了一种利用单片机控制的PWM调速装置实现小功率直流电动机调速的方法,具体详述了电路的设计思想、电路的组成以及工作原理。     

无刷直流电动机PWM调速实验系统

针对市场上现有的无刷直流电动机调速教学实验仪器不能自主构建控制方式和参数整定方法等不足之处，采用两两导通星形三相六状态工作方式，设计了用逻辑控制芯片控制的无刷直流电动机PWM调速实验系统，实现了无刷直流电动机的开环机械特性和双闭环控制调速测试等实验。     

基于电流型PWM变流器的绕线转子感应电动机调速系统研究

利用电流型PWM变流器实现了绕线转子感应电动机串级调速,通过对变流器矢量控制方案的研究,实现了在调速的同时转子能量的回馈,同时利用转子回馈能量对电动机的功率因数进行补偿,使功率因数接近为1.0.调速系统具有可靠性高、寿命长、谐波含量小、成本低等优点.实验证明了方案的可行性.     

想想看

1．直流电动机用晶闸管无级调速和PWM脉宽调速。输出的电压都是脉动的。为什么前者会恶化电动机性能而后者却不会？ 尽管直流电动机用晶闸管无级调速和PWM脉宽调速,输出的都是脉动电压。但晶闸管无级调速输出的脉动电压是50Hz低频脉动电压,既不能用电容器滤波,又很难用电抗器平滑．对电动机工作很不利,火花大、温升高、效率降低。用PWM脉宽调速,虽然输出电压也是脉动电压,但它的频率高,一般在10～20kHz,所以外部不须滤波,只靠直流电动机的电枢电感和续流二极管就可使电流平滑．对电动机工作有利。     

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.     

多电平逆变器PWM控制方法的研究

近年来,多电平逆变器在大功率场合应用越来越广泛.基于空间矢量原理提出了一种新的多电平PWM控制方法,这种PWM方法称为多电平最优空间矢量PWM方法(MOSV PWM),可用于多电平串联逆变器供电的压频比控制的异步电动机调速系统.仿真结果表明,MOSV PWM方法与多电平载波方法和单脉冲法相比有许多优点,可以在线实现,输出线电压THD低,开关频率低.这种方法可以推广用于其它类型的多电平逆变器,除电机传动外还可以用于静态无功补偿和其它FACTS场合.     

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.     

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.     

RFNN controlled sensorless induction spindle motor drive

A sensorless induction spindle motor drive using synchronous PWM (SPWM) and dead-time compensator with recurrent fuzzy-neural network (RFNN) speed controller is proposed in this study for advanced spindle motor applications. First, the operating principles of a new type SPWM technique and the circuit of dead-time compensator using field-programmable gate arrays (FPGA) are described. Then, a speed observer based on a modified Luenberger observer is adopted to estimate the rotor speed. Moreover, since the control characteristics and motor parameters for a high-speed induction spindle motor drive are time-varying, an RFNN speed controller is developed to reduce the influence of parameter uncertainties and external disturbances. In addition, the RFNN 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 simulated and experimental results.     

Digital field-oriented control for dual three-phase induction motor drives

A direct rotor-field-oriented control of a dual-three phase induction motor drive is described in this paper. The induction machine has two sets of stator three-phase windings spatially shifted by 30 electrical degrees. The stator windings are fed by a current-controlled pulsewidth-modulation (PWM) six-phase voltage-source inverter. Three key issues are discussed: (1) the machine dynamic model is based on the vector space decomposition theory; (2) the PWM strategy uses the double zero-sequence injection modulation technique which gives good results with low computational and hardware requirements; and (3) to eliminate the inherent asymmetries of the drive power section, a new current control scheme is proposed. Experimental results are presented for a 10-kW dual three-phase induction motor drive prototype.     

混合动力汽车用异步电动机驱动系统研究

针对混合动力汽车用异步电动机能量需要双向流动的特点,基于TMS320F2812数字信号处理器对电机驱动系统进行了设计,采用基于空间矢量PWM的直接转矩控制策略控制电机转矩,且能够有效的控制电机处于电动运行和发电运行状态,电机速度控制精度高.针对控制策略进行了必要的仿真,仿真和试验结果验证了系统的有效性.     

感应电机非线性输出反馈控制变频调速系统

针对以定子电压为控制量的交流感应电机调速系统存在的系统结构复杂、实时计算量大的缺点,提出了一种感应电机的非线性输出反馈控制变频调速方法。该方法依据感应电机的降阶模型,采用非线性输出反馈控制技术设计外环转速与磁链控制器,以滞环比较器作为内环电流跟踪控制器,直接产生PWM信号控制电压源逆变器,驱动感应电机运行,实现了对光滑转速参考信号的渐近跟踪。仿真结果表明该系统不仅具有快速的动态响应性能,而且对负载扰动具有较强的鲁棒性。     

新型异步电机在线监测和节能控制器的设计与实现

介绍了一种新型嵌入式异步电机在线监测与节能控制器。通过对异步电机定子工作电压电流的监测,分析电机工作效率,并对其实施PWM控制,从而实现对异步电机工作状态进行监测和节能控制。