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针对目前使用较多的无刷双馈电机的两种数学模型,即转子速d-q模型和统一坐标系模型,在推导过程和应用方面做了研究和分析.两个模型的推导目的都是将多回路模型简化为两轴模型,但是由于对转子的不同处理方法和坐标变换时对坐标轴的不同定义导致得到的数学模型不同.相对于多回路模型,转子速d-q模型阶数大大减少,更适合控制策略的研究,但d轴和q轴分量却合不成矢量方程,导致其在理论分析中带来不便.统一坐标系模型是矢量方程,形式简洁,使用方便.其功率、控制绕组和转子电压、电流和磁链可以折算到功率或控制绕组的以任意速度旋转的坐标系上.该模型更适合用于无刷双馈电机的各种控制策略.对这两个模型的研究与分析为无刷双馈电机控制策略的研究提供了参考. 相似文献
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绕线转子无刷双馈电机的d-q轴数学模型 总被引:1,自引:0,他引:1
在阐述绕线转子无刷双馈电机的定子绕组、转子绕组结构和静止a-b-c轴数学模型的基础上,推导出电机的d-q轴数学模型。这种电机模型建立在一个任意d-q轴坐标系下,使用起来方便,消除定子绕组和转子绕组之间互感矩阵的时变系数,缩短计算时间,有利于控制方法的实现,适用于绕线转子无刷双馈电机动态和稳态性能的分析研究。d-q轴数学模型的参数能根据电机的设计几何尺寸和经验公式得到。通过仿真分析结果和实验数据的对比,验证了任意d-q轴数学模型的正确性。绕线转子无刷双馈电机任意d-q轴数学模型的建立为电机性能分析和控制策略的研究奠定基础。 相似文献
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无刷双馈电机转子谐波含量大,导致电机损耗大、效率低,制约了其工业应用。为了解决这个问题,运用绕组齿谐波原理和正弦绕组原理,提出一种采用不等匝线圈设计转子结构的无刷双馈电机,并结合设计实例进行了详细分析。这种新结构能有效提高转子绕组在两种不同极对数下的导体利用率,并减少其它谐波含量。通过建模仿真和样机实验验证了结构设计的正确性。样机实验结果表明,不等匝线圈转子结构的无刷双馈电机能克服传统无刷双馈电机存在导体利用率低、谐波含量大的问题,具有良好的性能指标。 相似文献
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介绍了级联式无刷双馈电机的结构与原理,推导了该电机在转子速旋转坐标系下的数学模型.基于该数学模型,在Matlab/Similink环境下编写S函数,建立了级联式无刷双馈电机的仿真模型,并对电机的运行特性进行了验证,为该类电机用于大功率风力发电领域的研究铺垫理论基础. 相似文献
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介绍了无刷双馈异步风力发电机的结构及其发电调速原理。从无刷双馈电机的基本方程出发,通过坐标变换,建立了无刷双馈电机在转子旋转坐标系下的d-q模型,并进行了Matlab建模和仿真。仿真结果验证了模型的正确性,可作为无刷双馈异步风力发电机变速恒频发电控制研究的参考,同时对于风电场的运行和维护人员也有一定的指导意义。 相似文献
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笼型转子无刷双馈电机的动态特性仿真 总被引:5,自引:0,他引:5
无刷双馈电机在结构上与传统交流电机有较大的不同。本文介绍了对笼型转了无刷双馈电机的结构,原理与运行方式,建立了该种电机通用的数学模型,给出了参数计算方法,并对一台(4+2)极无刷双馈电机的多种运行方式进行了仿真研究。 相似文献
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Xiaodong Sun Long Chen Zebin Yang Huangqiu Zhu 《Electrical Engineering (Archiv fur Elektrotechnik)》2013,95(3):277-286
In this paper, the inductance characteristics of a 2-pole surface-mounted bearingless permanent magnet synchronous motor (BPMSM) with 4-pole suspension force windings are investigated based on theoretical analysis and experimental investigation. Firstly, the winding configuration and operation principle of the BPMSM are presented. Secondly, the static and incremental inductances are defined. Then, based on the finite element (FE) analysis method, the static inductances of torque windings and suspension force windings in stator static coordinate reference are researched. In addition, the d- and q-axes static inductances in rotor revolving coordinate reference are obtained by 3/2 Transformation. Furthermore, taking the torque windings as an example, the incremental inductance of torque windings is studied, and the validity of the theory is confirmed by comparing the static and incremental inductances. Finally, the experimental study is carried out to verify the discussed numerical analysis. The results are helpful to measure parameters and build the mathematic model of BPMSMs, and lay a foundation for the further research on BPMSMs. 相似文献
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双三相永磁同步电机的建模与矢量控制 总被引:2,自引:0,他引:2
针对相移30°Y型连接双三相永磁同步电机,分别采用双d-q变换和矢量空间解耦的方法建立了电机的数学模型,前者从两套三相子系统的角度给出了电磁转矩的表达式以及两套绕组之间存在的耦合关系,后者则揭示了不同的电流谐波分量对机电能量转换所产生的不同的作用.根据两种不同的模型搭建了两套双三相永磁同步电机矢量控制系统,通过对两种控制策略的比较分析,指出了两者之间的内在联系和在控制效果上的等价性.开环的仿真实验对两种建模方法的一致性进行了验证,而闭环的仿真和实验结果则表明两种矢量控制方案在相同的控制参数下具有一样的控制性能. 相似文献
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倒立摆控制系统对外部干扰信号非常敏感,并且对状态反馈量的精确度要求较高。为了提高系统反馈量的精确度,设计了一种采集以及统计旋转光电编码器脉冲信号的方案。该设计方案以STM32为核心,并设计了二阶低通滤波器、脉冲整形电路以及其他辅助电路。在实验中,分别测试了不同转速下光电编码器输出的脉冲信号。实验结果表明,该方案有效地解决了脉冲高频干扰、波形边缘振荡以及脉冲畸形的问题。此外,通过拉格朗日建模法建立了一级倒立摆的数学模型,并设计了基于此数学模型的倒立摆LQR控制器。最后,在实物系统中观察了摆杆角度实时变化曲线,间接验证了该脉冲信号采集方案的有效性。 相似文献
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Parameter and performance comparison of doubly fed brushless machine with cage and reluctance rotors
Fengxiang Wang Fengge Zhang Longya Xu 《Industry Applications, IEEE Transactions on》2002,38(5):1237-1243
The cage and reluctance rotors are two major types of rotor structures used in the doubly fed brushless machine (DFBM). In order to study comparatively the effects of different rotor structure on the DFBM, a prototype machine has been specially designed and built. The experimental parameter and performance comparisons between the axially laminated anisotropic (ALA) and cage-rotor machines are presented. It is found that the cage-rotor DFBM has better starting and asynchronous characteristics; however, the ALA reluctance-rotor DFBM exhibits better synchronous operation and doubly fed adjustable speed performance. 相似文献
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This paper deals with the problem of accounting for changes in the magnetic flux leakage of traction transformer windings under discrete cyclic load switching of traction winding sections during the simulation of continuous processes. It is proposed to take into account this change by introducing a fictitious mutual inductance and active components of the mutual impedance between the windings, which can be determined using the theory of a multiwinding transformer. A method for mathematical representation and computer simulation of the traction transformer with tapped secondary windings is considered based on the notation of the system of differential equations in the state space. Expressions for the calculation of the leakage inductance of the transformer windings and mutual inductances that take into account the change in the magnetic field of the winding leakage in the case of the discrete cyclic load switching of the tapped secondary windings. An algorithm for calculation of matrix elements of the equation of state is constructed. A simulation mathematical model of the traction transformer is developed in the Matlab/Simulink environment that takes into account the winding leakage field variation under discrete cyclic switching of the load of sections of traction windings. The adequacy of the proposed simulation mathematical model is proven by comparison of short-circuit currents obtained as a result of the simulation with currents of traction transformer short-circuit field tests. 相似文献