共查询到18条相似文献,搜索用时 171 毫秒
1.
2.
3.
双馈调速能够实现转速和无功的独立调节,具有广阔的应用前景。矩阵变换器以其优良的特性成为双馈电机转子励磁电源的理想选择。建立了矩阵变换器励磁的双馈电机定子电压定向的矢量变换控制模型,利用MATLAB/Simulink仿真平台进行了仿真研究。仿真结果验证了该方案的正确性和有效性。 相似文献
4.
5.
从电机稳态工作点角度出发,分析了矩阵变换器(matrix converter,MC)馈电的永磁同步电机(permanent magnet synchronous motor,PMSM)驱动系统静态稳定性.用"占空比矢量"表达矩阵变换器的输入输出关系,在旋转坐标系下建立系统小信号模型;利用Lyapunov稳定判据得到稳定运行区域及边界,分析了稳定边界的功率特性及系统参数对稳定运行区域的影响.理论分析及数值计算表明,矩阵变换器输出功率限值不恒定且与电机稳态工作点选取有关;参数对系统稳定性的影响表现出一定的规律性.仿真结果验证了文中的建模和分析正确、有效,相关结论和实验研究对MC-PMSM系统参数设计和性能分析具有指导意义. 相似文献
6.
本文结合矩阵变换器、双馈感应电机(DFIG)风力发电系统的优点,导出了双馈电机风力发电系统在同步旋转dq坐标轴下的矢量控制数学模型;针对常规矢量控制中存在电流耦合情况,设计一种新型、简易的电流前馈解耦控制方案.在此基础上,建立基于矩阵变换器交流励磁磁场定向电流解耦矢量控制策略.MATLAB仿真结果表明,当有功、无功功率变化时,电流解耦控制具有良好动态性能.本文设计了11kW风力发电试验装置并进行离、并网实验,当双馈电机处于亚同步、超同步状态时,双馈电机定子电压和频率均能保持稳定,实现变速恒频运行.实验结果表明,基于矩阵变换器交流励磁双馈风力发电系统是可行的,并具有一定的实用价值. 相似文献
7.
8.
针对传统双馈电机控制系统硬件复杂、维护困难等问题,提出一种新型的开绕组双馈电机调速系统。分析开绕组双馈电机的结构特点及功率流向,并研究了磁链变化及磁链保持恒定两种情况下的系统电压、电流和功率的关系。分别设计在不同转速条件下维持定子磁链恒定的开绕组双馈电机定子侧变换器和转子侧变换器的控制策略。建立了开绕组双馈电机的矢量控制系统的仿真模型,并给出了各情况下的双馈电机调速系统的仿真结果。采用基于DSP的数字实验平台,通过实验验证了控制系统的实用性,为开绕组双馈电机应用于实际工程奠定了良好的理论和实验基础。 相似文献
9.
10.
交-交矩阵变换器驱动下的PMSM矢量控制 总被引:1,自引:0,他引:1
给出永磁同步电动机的数学模型,并设计基于电流跟踪控制的交-交矩阵变换器.在上述研究的基础上,搭建了交交矩阵变换器驱动下的PMSM矢量控制系统Simulink仿真模型,验证了基于电流跟踪的交-交矩阵变换器驱动下实现PMSM矢量控制的可行性. 相似文献
11.
《International Journal of Electrical Power & Energy Systems》2013,44(1):736-743
A PMSM sensorless drive fed by a matrix converter has been designed to show that a drive system with high performance and efficiency can be constructed by combining the advantages of matrix converters, permanent magnet synchronous motors and sensorless control. Sensorless control of the motor is performed by using Extended Kalman Filter. The characteristics of matrix converter and performance of PMSM which are implemented by using a digital signal controller has been analyzed. Differences between the sensored and sensorless PMSM drive systems are also presented by considering the waveforms of the drive system. Promising results illustrated that EKF based sensorless control of matrix converter fed PMSM drive system with a good performance is achievable at medium and high speed operations. 相似文献
12.
I Introduction Matrix converter(MC)is a modern energyconversion device that has been developed over the lastthree decades[1~5].Matrix converter fed motor drive issuperiorto pulse width modulation(PWM)inverter drivessince it provides bi-directional power f… 相似文献
13.
《International Journal of Electrical Power & Energy Systems》2013,45(1):43-51
The Matrix Converter (MC) is well known for its diverse advantages and applications but the output characteristics are adversely affected by the input voltage disturbances because there is no energy storage elements present in the dc link. Hence the matrix converter fed drive performance is affected. In this paper, Internal Model Control (IMC) based controller which is capable of achieving perfect set point tracking and disturbance rejection is proposed for compensating the voltage disturbances and load disturbances of matrix converter fed vector controlled Induction Motor (IM) drives. Modeling of matrix converter with input voltage disturbances and parameter estimation of IMC based speed and current controllers for vector controlled induction motor drive are described in this paper. The simulation results validate the input voltage disturbance rejection and improved dynamic performance of matrix converter fed induction motor drive obtained using IMC based controller. 相似文献
14.
15.
16.
This article deals with a 12-pulse AC/DC converter for improving power quality in a midpoint converter based switched reluctance motor drive at AC mains. The conventional six-pulse AC/DC converter fed midpoint converter based switched reluctance motor drive injects high content of current harmonics into AC mains. The proposed 12-pulse AC/DC converter with a small rating passive filter is capable of eliminating harmonic currents from light load to full load with a high power factor. The proposed switched reluctance motor drive system is designed, modeled and simulated in Matlab/Simulink environment and its performance is compared with a conventional six-pulse AC/DC converter fed switched reluctance motor to demonstrate the power quality at AC mains. The simulated performance of the proposed 12-pulse AC/DC converter fed switched reluctance motor drive is experimentally validated for power quality improvement. 相似文献
17.
研究了一种适用于矩阵变换器供电的异步电机调速系统组合控制策略.同时实现了矩阵变换器的空间矢量调制和异步电机的定子磁场定向直接转矩控制(DTC).通过Matlab软件仿真和电力电子实验平台上的试验结果表明,采用这一控制策略的调速系统具有良好的静、动态性能,并且保持了单位功率因数. 相似文献