vector shift造句
例句与造句
- Firstly , this paper introduces the asynchronous motor model , and compares it with the dc motor ’ s . then the paper studies the principle of vector control , and proposes an improved current model of rotor flux observer . this paper also studies the three - level inverter ’ s topology , working principle , the neutral - potential unbalance mechanism and its controlling strategy . the paper especially studies the svpwm in details . the interface between the vector control and the three - level inverter is studied in details , including the generation of reference voltage vector , its judging of the sector and triangular regions , and the working mechanism after it sent into three - level inverter . when synthesizing the reference voltage vector , select the vector which only includes p and o states as the starting vector , thus eliminate the vector shift problem when sector changes . this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model . this construction is very explicit . the simulation results verify the inverter voltage output is correct , the rotor flux is steady , the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介绍了异步电机的数学模型,在此基础上将异步电机的数学模型与直流电机的数学模型进行了比较;然后介绍了矢量控制的基本原理,采用了一种改进的转子磁链电流型观测模型;对三电平逆变器的电路拓扑、工作原理、中点电位不平衡的机理及控制方法进行了介绍,详细分析了空间矢量脉宽调制策略。本文对异步电机的矢量控制与三电平逆变器之间的接口进行了详细的研究,包括:参考电压矢量的形成、所落扇区与具体小三角形区域的判断、送入逆变器之后的工作机理。在参考电压矢量的合成时,选择只包含p 、 o状态的空间电压矢量作为起始矢量,解决了扇区切换时的矢量突变问题。 - It's difficult to find vector shift in a sentence. 用vector shift造句挺难的
