【作者】 陈庆；

【导师】 何凤有；

【作者基本信息】 中国矿业大学 ， 电气工程， 2017， 硕士

【摘要】 本文提出了一种可用于电机驱动领域的两电平逆变器功率硬件在环测试方法。为此,逆变器不再与真实电机相连接,而是连接到一个可以模拟真实电机的逆变器。模拟真实电机的逆变器称为“虚拟电机”,基于“虚拟电机”的测试系统称为功率硬件在环测试系统。一般来说,“虚拟电机”由逆变器、调制器、反向电机模型和速度编码器模拟器四部分组成,分别在第二章和第三章进行详细介绍。首先,在第2.1节介绍了两电平逆变器模型和主回路参数计算;然后,在第2.2节分析了鼠笼异步电机和永磁同步电机动态数学模型;最后,在2.3节讲述SVPWM基本思想,虚拟电机中的调制器采用此方法产生用于逆变器的脉冲信号。第三章使用基于空间矢量理论的信号流图方法建立了鼠笼反向电机模型和永磁反向电机模型;速度编码器模拟器根据反向电机模型计算的速度产生与标准编码器相同的A、B、Z三路信号;此外,确定了逆变器九项测试方法。在第四章,使用MATLAB/Simulink软件完成功率硬件在环测试系统仿真研究。对于鼠笼虚拟电机功率硬件在环仿真,研究方法分为三步:1.搭建鼠笼异步电机磁场定向控制仿真模型;2.搭建使用反向电机模型的鼠笼异步电机磁场定向控制仿真模型;3.搭建“虚拟电机”取代鼠笼异步电机磁场定向控制仿真模型。永磁虚拟电机功率硬件在环仿真与鼠笼虚拟电机硬件在环仿真研究方法类似。仿真试验结果表明“虚拟电机”与真实电机具有相同的特性。如此,可在不需要真实电机的情况下对逆变器进行功率级的测试。更多还原

【Abstract】 This thesis presents an alternative approach for Power Hardware-in-the-Loop(PHi L)testing of two-level inverter for drive applications.For this purpose the inverter is not connected to a real machine,but to a second power inverter instead,which acts like an electrical machine.The second inverter is called “Virtual Machine” and the testing system based on “Virtual Machine” is called Power Hardware-in-the-Loop test system.Generally,“Virtual Machine” is consisted of inverter,modulator,inverse machine model,and speed encoder simulator,which are introduced in chapter two and chapter three respectively.In chapter 2.1 the two-level inverter model and the calculation of main circuit parameters is introduced firstly;then,in chapter 2.2 the dynamic mathematical models of the squirrel-cage-rotor machine and permanent magnet synchronous machine are analysed;last,in chapter 2.3 the basic idea of SVPWM is depicted,the modulator with this method generates the pulses signal used for inverter.In chapter three the squirrel-cage-rotor inverse machine model and the permannet magnet inverse machine model are builded based on the space vector theory by signal flow graph method;the speed encoder simulator generates the traces A,B and Z depending on the angular velocity calculated by the inverse machine model;in addition,nine test methods for inverter are choiced.In chapter 4,the power hardware-in-the-loop test system is finished through MATLAB/Simulink software.For squirrel-cage-rotor virtual machine power hardware-in-the-loop simulation,the research method is divided into three steps:1.Build Field-oriented control simulation model of squirrel-cage-rotor machine;2.Build Field-oriented control simulation model of squirrel-cage-rotor machine with inverse machine model;3.Build Field-oriented control simulation model of squirrel-cage-rotor machine replaced by “Virtual Machine”.Permanent magnet virtual machine power hardware-in-the-loop research method is similar to squirrel-cage-rotor virtual machine.The simulation results show that the presented “virtual machine” has the same characteristics as a real machine.An inverter can be tested without a real machine.更多还原