四开关三相方波无刷直流电机的磁链跟踪控制

在分析传统六开关三相无刷直流电机运行原理的基础上,提出四开关三相方波无刷直流电机的磁链跟踪控制策略.系统外环为转速环,通过转速环输出和电流形状函数分别相乘实现三相电流的给定,借助坐标变换在两相静止坐标系下构建电流闭环,采用磁链跟踪型调制策略实现对四开关逆变器的控制,从而克服了滞环调制的开关频率不固定问题,实现了四开关三...     

EKF-based sensorless IPM synchronous motor drive for flux-weakening applications

This paper deals with the experimental realization of a sensorless interior permanent-magnet synchronous motor drive. The motor has been specifically designed to get a wide flux-weakening region, to minimize the drive power rating in spite of a wide speed range. Position and angular speed of the rotor are obtained through an extended Kalman filter. The estimation algorithm requires neither the knowledge of the mechanical parameters, nor the initial rotor position. In the paper, particular emphasis is placed on control algorithms, which are complicated by the motor anisotropy and which have been specifically studied to enhance the overall system performance.     

A high-performance inverter-fed drive system of an interiorpermanent magnet synchronous machine

A high-performance, fully operational four-quadrant control scheme for the interior permanent magnet (PM) synchronous machine is described. The machine operates smoothly with full performance in the constant-torque region as well as in the flux-weakening constant-power region in both directions of motion. The transition between the constant-torque region and the constant-power region is very smooth at all conditions of operation. Control in the constant-torque region is based on the vector stator flux, while constant-power region control is implemented through the feedforward vector rotator. The control system is digitally implemented using a distributed microcomputer system, and all of the essential feedback signals such as torque, flux, etc. are estimated with precision. A 70 hp drive system using a neodymium-iron-boron (NeFeB) PM machine and transistor pulse width modulation inverter was designed and extensively tested in the laboratory on a dynamometer, and performance was found to be excellent     

逆变器供电的感应电机驱动系统故障仿真研究

研究了一种基于开关函数概念的逆变器仿真模型,在MATLAB/SIMULINK环境下,利用工具箱内部的基本模块建立了逆变器开关元件短路、开路及同桥臂两开关元件同时开路状态下的仿真模块.利用电动机的数学模型,编制了电动机s函数.针对不同故障模式,只需改变开关函数模块即可方便实现逆变器电机驱动系统的不同状态仿真.研究了不同故障模式下的电机相电流和转矩波形,仿真结果表明电机相电流可以作为故障特征实现逆变器故障检测与诊断.     

Quasi-resonant inverter-fed direct torque controlled induction motor drive

A quasi-resonant inverter-fed induction motor operated under direct torque control (DTC) scheme is modeled and analyzed with SABER simulator. The dc link voltage is clamped to source voltage. All the devices in the resonant link and inverter except auxiliary switch in the resonant link are operated soft under zero-voltage switching (ZVS). The auxiliary switch is turned on under zero-current switching (ZCS), but turned off hard. This scheme has been implemented on a laboratory-sized experimental setup. A comparison of simulation and experimental results under identical operating conditions were presented.     

逆变器供电的电动机变频调速系统实时故障检测

针对逆变器开关元件短路及断路故障问题,提出了一种新的电动机变频调速系统实时故障检测方法。基于对称分量方法,研究了逆变器输出电压信号的正序对称分量,建立了变频调速系统的数字状态空间模型。利用卡尔曼滤波实现了电压信号的基本正序对称分量实时无偏估计,通过实际系统与理想无故障系统基本正序对称分量的比较,提出了基本谱残差的概念,并给出了故障决策函数,实现了调速系统的实时在线故障检测。仿真结果验证了该方法的有效性。     

三相PWM变换器传导干扰的预测分析

为了预测整流-逆变-感应电机系统的传导干扰,建立系统的共模和差模等效电路.等效电路由干扰源和耦合通道构成,用干扰源的数学模型代替电力电子器件开关时的非线性环节,对整流桥产生的共模和差模干扰采用傅里叶变换得出共模和差模干扰源的表达式,对逆变桥产生的共模和差模干扰采用双重傅里叶积分法得出干扰源的表达式,根据共模和差模传播路...     

三相PWM驱动电机系统干扰源的数学模型

针对三相PWM驱动电机系统难以建立用于预测干扰的准确的高频干扰源数学模型这一问题,提出将整流桥和逆变器两个干扰源分开进行研究的方法.采用傅里叶变换法建立整流桥的干扰源模型,采用双重傅里叶积分法建立逆变桥产生的共模和差模干扰的干扰源数学模型,把PWM载波和基波用两个独立周期的时变函数来描述,将其共同作用的函数作为被积函数,并详细推导了正弦脉宽调制技术的内外积分线的确定过程.最后通过实验结果和仿真结果的比较,验证了所建立整流桥和逆变器的干扰源模型的正确性,因此该数学模型可作为三相PWM驱动电机系统的传导干扰预测的干扰激励源.     

基于模糊-PID控制的主从电机同步传动系统

基于模糊-PID算法设计了主从电机同步传动系统,根据模糊-PID算法在PIE中设计了一个补偿控制器,对从电机进行转速控制,从而实现从电机与主电机的高精度的同步传动控制.     

An efficiency-optimizing permanent-magnet synchronous motor drive

A permanent magnet synchronous-motor drive that uses and adaptive control to find the maximum-efficiency operating point at any speed and load is demonstrated. Active damping is provided by modulating the inverter frequency in proportion to the perturbations in the average inverter DC link current. All principal control functions, including efficiency optimization and frequency modulation, are performed by a real-time digital control algorithm, using only the filtered inverter DC link current as a feedback signal from the inverter. Laboratory tests and computer simulations demonstrate the performance of the efficiency-optimizing control and the frequency-modulation feedback loop     

Design of a synchronous reluctance motor drive

A segmental-rotor synchronous reluctance motor is used in a variable-speed drive with current-regulated pulse-width-modulated (PWM) control. The low-speed torque capability is compared with that of an induction motor, a switched reluctance motor, and a brushless DC PM motor of identical size and copper weight. A particular point of interest is the comparison of motors of different types, all with essentially the same frame size and tested under identical conditions. The results suggest that many of the desirable properties of the switched reluctance motor can be realized with the synchronous reluctance motor but with using standard AC motor and control components. The torque capability is lower, but so is the noise level     

Servo drive system and control characteristics of salient polepermanent magnet synchronous motor

Permanent magnet (PM) synchronous motors fed by PWM inverters are considered. PM motors sometimes have a saliency, in which the q-axis inductance is larger than the d-axis inductance. A high-performance servomotor drive system for a salient-pole PM motor is described. An armature current vector is actively controlled according to load conditions in order to use a reluctance torque effectively, and, as a result, a large torque can be produced. The control algorithm for the armature current vector is described, taking the demagnetization of the PM and the magnetic saturation into account. Characteristics such as torque, power factor, efficiency, power capability, transient responses, etc. are examined in detail by computer simulations and experimentally     

Filtering techniques to minimize the effect of long motor leads onPWM inverter-fed AC motor drive systems

In this paper, filtering techniques are investigated to reduce the motor terminal overvoltage, ringing, and dv/dt in inverter-fed AC motor drive systems where long leads are required. Analysis is presented to show that the distributed LC of a cable and the pulse-width modulated (PWM) inverter switching action lead to motor terminal voltage reflections and ringing that stress the turn insulation and contribute to bearing currents. First- and second-order shunt filter designs are analyzed and compared. Detailed design equations to match the filter impedance to the cable surge impedance and to determine the filter component values are presented. It is demonstrated that a first-order shunt filter connected at the motor terminals significantly reduces the overvoltage stress and ringing, and also lowers the dv/dt of the PWM switching pulse. Simulation and experimental results are presented to verify the proposed filter designs for 50-ft and 100-ft cable lengths for 460-V PWM insulated gate bipolar transistor (IGBT) AC motor drive systems     

多电机同步传动控制系统

介绍了9300系列伺服控制器的CAN总线和数字频率输入/输出在湿法毡生产线同步控制系统中的应用,详尽地分析了生产线7台变频电机分部传动的实现方法和工作原理.     

Control strategy for the run-up of an inverter-fed synchronous motor with voltage valves

Contents An inverter with thyristors and antiparallel diodes (voltage valves) connected to a synchronous machine offers the possibility of operating the motor at higher speeds than the so-called current-converter motor — a synchronous motor fed by an inverter with thyristors (current valves) — is able to do. The disadvantage of a more complex run-up performance can be overcome by a control strategy which takes care of the additionally induced free-wheeling diode and machine currents. These currents depend on machine parameters and especially on the control angle as is explained. Digital simulation and results from an experimental drive system verify the calculated characteristics.

---

Steuerstrategie für den Anlauf einer stromrichtergespeisten Synchronmaschine mit Spannungsventilen

Übersicht Ein Umrichter mit Thyristoren und antiparallelen Dioden (Spannungsventilen), der einer Synchronmaschine vorgeschaltet ist, eröffnet die Möglichkeit, die Synchronmaschine mit höheren Drehzahlen als beim Stromrichtermotor, der nur Thyristoren (Stromventile) enthält, zu betreiben. Der Nachteil des nicht so einfachen Anlaufs der Maschine kann durch eine geeignete Steuerstrategie, die die zusätzlich induzierten Diodenfreilaufströme und Maschinenfreilaufströme berücksichtigt, kompensiert werden. Diese Ströme hängen von Maschinenparametern und insbesondere vom Steuerwinkel ab, wie im einzelnen erläutert wird. Eine digitale Simulation und Resultate aus einem experimentellen Antriebssystem bestätigen die theoretisch berechneten Kurven.

     

High-performance PM synchronous motor drive for an electricalscooter

In this paper, the design of a full electrical system for an electrical scooter is presented. The paper explains the design choices that have been made to satisfy the typical main requirements for an electrical vehicle. According to them, an interior permanent-magnet synchronous motor has been incorporated in a drive able to control the motor both in the constant-torque (constant-flux) and in the constant-volt-ampere (flux-weakening) regions. Experimental results carried out on a system prototype are also included in the paper     

Observer-based stator-flux-oriented vector control ofcycloconverter-fed synchronous motor drive

A six-pulse noncirculating-current cycloconverter-fed synchronous motor with stator-flux-oriented vector control for high-power and low-speed applications is discussed here. Vector control is achieved by stator flux estimation through a novel closed-loop reduced-order observer exhibiting stable speed regulation. Variable displacement factor operation is incorporated to keep both the system current continuous and the system utilization optimum. A simple method is used in designing the controller for armature current regulation with good performance. A generalized digital simulation of the drive system is made, and the simulation results are validated by a low-cost laboratory implementation of the drive with a 386DX PC-based system with 80387 floating point support     

五桥臂电压源逆变器两永磁同步电机驱动的研究

以五桥臂电压源逆变器驱动两台三相永磁同步电机控制系统为研究对象,采用半周期调制策略实现两电机速度的独立控制。结合两电机的d、q轴数学模型,分别设计两电机的无差拍电流控制器。相比传统的PI控制器,无差拍控制器能将下一拍的输出值直接给定为控制量的参考值,从而缩短了系统动态过程的调节时间。仿真和实验结果验证了无差拍控制器的快速性和有效性。     

10kW高速永磁同步电主轴驱动控制系统设计

介绍了一种10k W高速永磁同步电主轴驱动控制系统。系统采用背靠背双向PWM拓扑结构,DSP+CPLD为核心控制单元,通过无位置传感器检测技术和矢量控制算法驱动控制高速主轴电机,具有良好的动静态速度调节性能。系统包括主电路、控制单元、采样电路、驱动电路、监控和接口电路、保护电路等。详细介绍了硬件设计的思路和技术参数,制作了试验样机,并搭建了高速试验台,对样机进行了试验验证,试验结果证明了本系统良好的动静态性能。