开关磁阻电机功率变换器主电路拓扑结构

本文对现有的开关磁阻电机功率变换器主要电路进行了简单的分类，介绍了各类功率变换器的拓扑结构，并对所有的拓扑结构进行了比较，对选择SRD功率变换器有限强的指导意义。     

开关磁阻电机功率变换器故障在线诊断

本文先具体分析不对称半桥式功率变换器内部的主电路拓扑。之后再通过将理论和仿真实验相结合来有效地诊断变换器内部的功率和故障。在这之后再有效地分析电压脉宽调制单管的控制策略,并有效地分析如果变换器在使用的过程中出现了单向的故障,斩波电流和续波电流所表现出来的故障。在实际操作的过程中,也可以通过提出一种直流母线电流来制作出一种变换故障器的诊断方案,并分析该方案的主要优势。     

开关磁阻电机故障诊断系统研究

本文以TMS320F2812为控制器,以四相8/6型开关磁阻电机(SRM)为控制对象,设计了一种性能优良的具有故障诊断功能的开关磁阻电机调速系统。本文介绍了开关磁阻电机调速系统的工作原理,包括功率变换器,电流检测,位置检测,速度检测等硬件电路,并重点分析了系统的故障运行情况。最后给出了实验波形,说明开关磁阻电机具有良好的容错性能。     

讲座（四）开关磁阻电机驱动系统的控制策略综述

本文回顾了开关磁阻电机驱动系统发展过程中出现的各种控制策略，分析和介绍各控制策略的优缺点，展望了SRM控制策略的发展趋势。     

讲座（一）：开关磁阻电机驱动系统发展概况

本文介绍了开关磁阻电机驱动系统（Switched Reluctance Drive,SRD）的发展概况，系统构成以及目前的研究热点。     

开关磁阻电机调速控制技术研究

本文从分析磁阻开关电机的结构特点入手，详细介绍了开关磁阻电机调速系统的工作原理和运行特征，通过理论计算和试验数据结合比较，给出了电机调速控制理论和控制方法。     

测试回路杂散电感消除技术研究

由于测试回路中的杂散电感会在被测器件开通和关断的过程中感应出较高的电压尖峰,增大了被测器件的电压应力,严重影响被测器件相关参数的测试精度,甚至导致被测器件损坏。对高压探针测试系统测试回路中产生杂散电感的原理进行研究,通过仿真分析和优化设计,提出了一种在测试回路中采用叠层母排结构以降低杂散电感的解决办法。     

开关磁阻电机非线性电磁特性的磁链模型

开关磁阻电机调速系统具有直流和交流调速系统的优点,在航空航天、机械电子、家电等领域获得了广泛的应用。由于开关磁阻电机的磁路饱和、涡流、磁滞效应等产生的非线性,使其精确的数学模型非常复杂,且难以解析计算。本文采用理论推导和曲线拟合的方法,根据开关磁阻电机定子的相电感表达函数,计算得到其电磁特性和拟合曲线,并与实测的磁链数据对比研究,从而推导出开关磁阻电机运动电势和增量电感的解析表达式,为其在线控制系统的设计和研究提供了指导。     

电动汽车用开关磁阻电机调速控制系统的设计与研究

针对目前电动汽车所使用的有刷直流电机控制存在系统复杂、稳定性差的问题,设计了一种开关磁阻电机调速控制系统,通过与有刷直流电机调速系统对比,开关磁阻电机调速控制系统的性能较好,且启动电流明显小于有刷直流电机的启动电流,使电动汽车的电池使用寿命增加,且使用开关磁阻电机比有刷直流电机的电动汽车可以多行驶12km,节能效果较好,约节能11%。     

基于GPRS的开关磁阻电机控制器远程控制系统的设计与实现

GPRS通用无线分组业务是一种基于GSM系统的无线分组交换技术,提供端到端、广域的无线IP连接,具有传输速率快、运营费用低、可靠性高、开发方便等明显的优点。本文介绍了一种基于GPRS的开关磁阻电机远程控制调速系统以及进行数据采集的系统,包括其系统硬件及软件设计。     

大功率变流器系统H桥低感叠层母线排设计

针对80kVA/400A变流器H桥母线排的设计要求,使用ANSOFT MAXWELL有限元分析软件比较了不同设计原则下杂散电感参数的变化,并提出了一种新型的优化母线排结构,较少了IGBT模块的关断过冲电压,并优化了高频电流的分布。通过仿真和实验分别证实了新型母线排的良好测试结果,最后给出了系统结构和实验波形。     

Design of Parasitic Inductance Reduction in GaN Cascode FET for High‐Efficiency Operation

This paper presents a method of parasitic inductance reduction for high‐speed switching and high‐efficiency operation of a cascode structure with a low‐voltage enhancement‐mode silicon (Si) metal–oxide–semiconductor field‐effect transistor (MOSFET) and a high‐voltage depletion‐mode gallium nitride (GaN) field‐effect transistor (FET). The method is proposed to add a bonding wire interconnected between the source electrode of the Si MOSFET and the gate electrode of the GaN FET in a conventional cascode structure package to reduce the most critical inductance, which provides the major switching loss for a high switching speed and high efficiency. From the measured results of the proposed and conventional GaN cascode FETs, the rising and falling times of the proposed GaN cascode FET were up to 3.4% and 8.0% faster than those of the conventional GaN cascode FET, respectively, under measurement conditions of 30 V and 5 A. During the rising and falling times, the energy losses of the proposed GaN cascode FET were up to 0.3% and 6.7% lower than those of the conventional GaN cascode FET, respectively.     

Design and Control of a Linear Propulsion System for an Elevator Using Linear Switched Reluctance Motor Drives

Linear switched reluctance motors (LSRMs) for the primary propulsion of a ship elevator is proposed and investigated for the first time in this paper. To achieve the stated objective, a new type of LSRM is proposed with twin stators and a translator between them with no back iron in the translator. The proposed configuration of the LSRM is designed, simulated, analyzed, compared with traditional LSRMs, and verified by experimental measurements. The number of LSRM propulsion subsystems required is studied with a view to minimize their weights and an optimization study for that purpose is developed. Unique placement of the LSRM propulsion systems on the elevator is presented. The propulsion force is generated using one phase or multiphase excitation. To reduce propulsion force pulsations, a major requirement in elevators, controlled multiphase excitation using one of the known force distribution functions (FDF) is an acceptable solution. In this paper, it is proved that the currently available FDFs are able to reduce the force pulsations but are not able to meet the peak force command for the system. Consequently, the velocity and position control do not meet even the elementary performance requirements any more. A new FDF is proposed in this paper and presented to overcome the problem caused by a conventional FDF. The control system with the proposed FDF is derived and integrated into velocity and position controllers. Extensive dynamic simulation and experimental verification of the proposed LSRM with the novel FDF is proved to give superior performance in this paper. Such high performance capable of meeting vertical elevator applications is demonstrated.     

Optimization and Evaluation of Torque-Sharing Functions for Torque Ripple Minimization in Switched Reluctance Motor Drives

Two improved torque-sharing functions for implementing torque ripple minimization (TRM) control are presented in this paper. The proposed torque-sharing functions are dependent on the turn- on angle, overlap angle, and the expected torque. This study shows that for a given torque the turn-on angle and the overlap angle have significant effects upon speed range, maximum speed, copper loss, and efficiency. Hence, genetic algorithm is used to optimize the turn-on angle and the overlap angle at various expected torque demands operating under the proposed TRM control in order to maximize the speed range and minimize the copper loss. Furthermore, four torque-sharing functions are used to derive the optimized results. At the same time, a fast and accurate online approach to compute the optimal turn-on and overlap angles is proposed. Therefore, this paper provides a valuable method to improve the performances of switched reluctance motor drives operating under TRM control.