永磁同步电动机再生制动状态的分析与仿真

电动汽车中驱动电动机系统的再生制动是提高驱动系统效率与性能的关键。本文分析了由天相桥式逆变器驱动的永磁同步电动机再生制动的方式及存在的不同状态，并给出了仿真结果。     

同步电动机滞环控制的仿真研究

介绍了一中新型计算机仿真软件包－ＳＩＭＮＯＮ,基于ＳＩＭＮＯＮ,建立了包括滞环ＰＷＭ逆变器,永磁同步电动机,矢量控制在内的系统的完整动态模型,并在数字计算机进行了仿真研究,将系统分解为国小的互连子系统,详细研究了电力电子系统和永磁同步电动机滞环控制的仿真技术,给出了仿真研究结果。     

PWM变频调速电动机端子上电流特性的研究

研究了ＰＷＭ变频调速电动机端子上的电流特性,测量了驱动系统中各连接点的电流波形,特别是由陡上升沿电压引起的高频尖峰电流分量的特性,同时也研究了电缆长度及滤波器对驱动系统中各连接点的电流波形的影响,从理论上分析和讨论了电动机绕组的电流特性与其电压分布特性的关系,提出了改善绕组电压分布的初步措施。     

微机在线控制PWM的分析计算方法

针对频率自控式永磁式同步电动机调速系统逆变器１２０°导通状态，给出了一种ＰＷＭ调制模式。解决了正弦脉宽调制在线计算开关角的问题，并提出了一种分级同步ＰＷＭ控制策略。     

电压型逆变器供电的三相永磁同步电动机起动过程仿真

建立了ＰＷＭ波电压型逆变器与三相永磁同步电动机的数学模型，用自选步长的四阶龙格－库塔法编制了仿真程序，并对在以自然采样，规则采样的双边对称调制、规则采样的单边调制ＳＰＷＭ波及调制波为梯形波的ＰＷＭ为输入时，系统在不同负载转矩、不同转动惯量情况下的起动过程进行了仿真，绘出了转速曲线、转矩曲线，并对仿真结果进行了分析．     

方波PWM电源驱动的纯单相异步电动机振动转矩及其测量

介绍了一种方波ＰＷＭ电源驱动的纯单相异步电动机振动转矩的计算及其测量方法，并介绍了转矩的物理表达式和参数表达式，分析了振动转矩产生的原因，列举了振动转矩的测量、仿真实例，为改善方波ＰＷＭ电源驱动的单相异步电动机调速系统的性能提供了参考。     

永磁同步电动机伺服系统再生制动过程分析

针对永磁同步电动机伺服系统定位速度快、精度高的要求,从转子磁链定向的永磁同步电机矢量控制模型出发,分析了电机再生制动的原理和过程,以及采用SVPWM调制方式下能量回馈的过程.实验结果表明了理论分析的正确性和可行性.     

基于矢量控制的永磁同步电动机回馈制动的仿真与研究

在分析永磁同步电动机的制动过程和矢量控制理论的基础上,提出了基于矢量控制算法来实现永磁同步电动机的回馈制动。在分析永磁同步电动机回馈制动实现的前提条件时,考虑到传统的电流滞环控制方式无法实现电能的回馈,又提出了一种全新的电流滞环控制策略。而后在Matlab/Simulink中搭建了整个系统的数学模型,并从仿真结果验证了基于矢量控制的永磁同步电动机回馈制动的可行性。     

混合式功率步进电动机的新型驱动电路

根据功率型混合式步进电动机目前常用的ｂｕｃｋ型升频升压驱动和单电压桥臂斩波驱动两种驱动系统运行的特性，提出了一种升频升压型ＰＷＭ恒相流斩波驱动方式。这种新型驱动电路解决了这两个系统的平稳性与快速性的矛盾。文中给出了电路参数的设计方法及实验结果。     

电动车的电动机驱动及控制技术发展概况机电一体化微电机的开发现状和发展前景

概述电动车的直流电动机驱动系统与交流电动机驱动系统的不同特点，介绍应用于电动车的异步电动机驱动系统及控制、永磁同步电动机驱动系统及控制、开关磁阻电动机驱动系统及控制的进展。     

A Sinusoidal Pulsewidth Modulated Three-Phase AC to DC Converter-Fed DC Motor Drive

The external performances such as power factor, displacement factor, harmonic factor, and ripple factor of a three-phase ac to dc converter-fed separately excited dc motor drive employing sinusoidal pulsewidth modulation (SPWM) control technique are obtained for different speeds and modulation indexes. Since separately excited dc motors with armature voltage control provide constant torque operation, the external performance is also determined for the drive motor operating at different values of constant load torque. Motoring and regenerating operations of the dc drive machine are considered. The three-phase PWM converter-motor drive system is analyzed, taking commutation effects into account in motoring and regenerating operations. The analysis has revealed 27 common modes in one repetitive period of the output voltage. The sequence of modes for all pulses in one period of the output voltage is established. Experimental oscillograms of typical waveforms from a laboratory-sized dc motor are illustrated to verify the basic principles of operation. Although the converter circuit requires some additional components in comparison with the commonly used phase-controlled converter, the improved performance characteristics make it attractive for industrial applications involving large power ratings.     

混合动力中无刷直流电机反接制动PWM调制方式的研究

对无刷直流电机中采用的反接制动方式进行了比较研究，将目前采用的5种PWM调制方法归为两类。同时，针对反接制动时电流无法控制的问题，该文指出反电动势短接回路的存在是造成再生电流无法控制的主要原因。从而提出采用双管调制的方法可以对制动电流进行有效的控制。另外，通过对不同PWM调制方法下换相转矩的分析，提出在换相时根据转速来相应调节占空比的方法可以抑制换相转矩脉动。实验结果表明，采用双管调制的反接制动可以有效的控制制动电流，并且具有很好的换相效果。     

小电感无刷直流电机不同驱动结构下的控制特性及功耗比较

针对具有小电感特性的无刷直流电机,比较了全桥结构下PWM驱动和PAM驱动方式的区别。两种驱动方式下系统的控制特性和功耗有所不同,对于全桥结构下的PWM驱动方式,具有调速特性非线性的特点,在控制系统设计时应考虑在不同转速下采用不同的比例系数;而PAM驱动方式具有调制特性线性度好、电流平滑、涡流损耗小、系统功耗低和高低速系统特性一致的特点,但相对地增加了结构复杂性。两种驱动结构应根据实际情况使用。     

基于双模控制的永磁直流电机驱动系统的研究

根据混合动力的工作模式,针对电机电动和回馈制动两种运行状态,提出了双模PWM电流控制策略,在电动运行时,采用PI调节和受限单极PWM控制;在制动过程中,根据通常的PWM控制不能对回馈电流峰值进行有效的控制而可能损坏电池,提出采用电流滞环控制,仿真表明,该控制效果要优于PWM控制回馈制动。以数字信号处理器(DSP)为核心,采用智能功率模块设计了永磁直流电机PWM驱动系统。并对混合动力电动汽车(HybridElectricVehicle,简称HEV)进行了静态和运行实验,实验结果表明本文采用的方法和研制的驱动系统的有效性。     

Analysis of PWM GTO Current Source Inverter-Fed Induction Motor Drive System

A GTO current source inverter which consists of six main GTO's, two auxiliary GTO's, and three capacitors is presented. This inverter can supply both the sinusoidal voltage and current to the motor by pulsewidth modulation (PWM) techniques. The normal PWM pattern produced by two control signals with the carrier and the modulating waves and the optimal PWM pattern determined by the harmonic analysis are described. The experimental waveforms for 2.2-kW induction motor drives are given and the circuit operation of this inverter in the PWM technique is clearly shown. In addition, the steady-state characteristics of this inverter-induction motor drive system are analyzed by the state-variable methods, and a close agreement between the analyzed and the experimental waveforms is obtained. It is shown that the harmonic components are eliminated or reduced by using the optimal PWM pattern, and the new inverter with sinusoidal current and voltage is very excellent for ac motor drive.     

PWAM控制的Quasi-Z源电机驱动系统

针对传统的quasi-Z源电机驱动系统效率低、体积大等缺点,提出了一种新型的脉冲宽度幅值调制PWAM(pulse-width-amplitude-modulation)方法。与其他广泛应用于电机驱动系统中的PWM方法有很大不同,该调制方法中每个调制周期内只有一个桥臂的上下开关管进行PWM的开关动作。因此,整个逆变器的开关动作和开关损耗大大减少,电机驱动系统的效率也随之提高;与传统PWM方法相比,混合调制方法所需的电感、电容明显减小,这使得系统的体积减小,经济性更强。通过建立1 k W的quasi-Z源逆变器仿真模型,其仿真结果验证了基于PWAM的磁场定向控制的永磁同步电机具有良好的运行结果。     

一种电机驱动用大功率网侧变流系统研究

提出了一种电机驱动用高性价比大功率网侧变流系统。主电路采用二极管整流器与PWM整流器并联,充分利用二极管整流器简单可靠、成本低,以及PWM整流器能量双向流动、功率因数高的优点,不仅能够省去传统电机驱动中的制动电阻,节约电能,还能提高交流系统功率因数。控制上通过对二极管整流器输出特性的研究,并调节PWM整流器输出特性,实现了PWM整流器与二极管整流器的协调工作。仿真和试验验证了主电路方案及控制方法的有效性。     

Characteristics of a Controlled-Current PWM Rectifier?Inverter Link

Two controlled-current pulsewidth-modulated (PWM) converters have been integrated into rectifier-inverter links of variable-speed ac motor drives. The authors focus on developing a mathematical model of the rectifier-inverter link and presenting experimental justification of the model. The characteristics of the rectifier-inverter system and the constraints imposed by the voltage feedback loop and dc link voltage are discussed. The rectifier-inverter system is made to drive a ``selfcontrolled' synchronous motor, thus forming a system for which both the utility and the motor currents are near sinusoidal. The optimized power conversion capability of the motor is now matched by unity power factor operation on the rectifier side. Fast reversal from motoring to regenerative braking capability is demonstrated experimentally.     

Performance Improvement of Current Source Inverter-Fed Induction Motor Drives

A high performance variable speed drive system using current source inverter fed induction motor is described. The principle of the drive control is based on the field-orientation method, where the stator current is used as the vector quantity. To improve the system response and to operate smoothly at low speed, a current pulsewidth modulation (PWM) control is provided by means of a feedback loop. This system operates stably and shows a high dynamic performance in a wide range, from zero to rated speed. Dual current source inverter is applied to this drive system which results in a remarkably low copper loss of the motor, even in PWM operation.     

Quick regulation of sinusoidal output current in PWMconverter-inverter system

An induction motor drive system composed of a current output-type power converter and a current source inverter with sinusoidal input and output voltage/current is presented. Pulsewidth modulation (PWM) strategies with GTOs are applied to the converter and the inverter sections from the point of view of reduction of the current harmonics and suppression of the motor torque pulsations. A simple method for quick regulation of the AC output current amplitude is presented and applied to the PWM inverter section. To demonstrate the improvement in the current response of the inverter, a slip frequency/current regulation of an induction motor is considered. The experimental results of steady-state and dynamic operations of the motor are shown. The merits and demerits of this control method are discussed