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Nonlinear Decoupling Control of the Bearingless Induction Motors Based on the Airgap Motor Flux Orientation 被引量:8
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作者 邓智泉 张宏全 +1 位作者 王晓琳 严仰光 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2002年第1期38-43,共6页
The bearingless induction motor, which combines the inductionmotor and magnetic bearing is a strongly coupled complicatednonlinear system; the decoupling control of the electromag- net toqueand readial levitation forc... The bearingless induction motor, which combines the inductionmotor and magnetic bearing is a strongly coupled complicatednonlinear system; the decoupling control of the electromag- net toqueand readial levitation force is the base of the stable operation ofthe benaringless motor. In this paper, the air-gap motor fluxoriented vector control is proposed to realize the decoupling controlof this nonlinear system even in the transient case based on thelevitation principle. Simulations show the stable suspension and goodperformance of the proposed algorithm. 展开更多
关键词 bearingless induction motor airgap motor flux oriented vector control decoupling control
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Novel high torque bearingless two-sided rotary ultrasonic motor 被引量:7
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作者 LI Xia CHEN Wei-shan XIE +1 位作者 Tao LIU Jun-kao 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第5期786-792,共7页
Applications are limited at present because the currently available ultrasonic motors (USMs) do not provide suffi-ciently high torque and power. The conventional travelling-wave USM needs the bearing to support, which... Applications are limited at present because the currently available ultrasonic motors (USMs) do not provide suffi-ciently high torque and power. The conventional travelling-wave USM needs the bearing to support, which required lubricant. To solve the above problem, a bearingless travelling-wave USM is designed. First, a novel structure of the two-sided USM consisting of a two-sided teeth stator and two disk-type rotors is designed. And the excitation principle of the two-sided travelling-wave USM is analyzed. Then, using ANSYS software, we set up the model of the stator to predict the excitation frequency and modal response of the stator. The shape of the vibration mode was obtained. Last, the load characteristics of the USM are measured using ex-perimental method. The maximum stall torque and the no-load speed were obtained. The results showed that the characteristics of the two-sided USM are better than those of the conventional one-sided USM. 展开更多
关键词 Two-sided Ultrasonic motor (USM) Piezoelectric motor Travelling-wave bearingless
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Analysis of a new 5-phase bearingless induction motor 被引量:4
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作者 HUANG Jin KANG Min YANG Jia-qiang 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第8期1311-1319,共9页
This paper addresses the bearingless motor with a single set of multiphase windings. The interaction between M and M±1 pole-pair magnetic fields produces radial force. Based on this principle,a bearingless machin... This paper addresses the bearingless motor with a single set of multiphase windings. The interaction between M and M±1 pole-pair magnetic fields produces radial force. Based on this principle,a bearingless machine is obtained. Conventional bearingless machine has dual windings,levitation windings and torque windings,which produce the two magnetic fields. In the proposed bearingless motor,the two needed magnetic fields are produced by feeding two groups of currents to a single set of multiphase windings. Taking a 5-phase induction motor as example,the inductance matrices,considering air gap eccentricity,are calculated with the modified winding function method. The radial force analytical model is deduced by virtual displacement,and its results are validated by FEA. The mathematical model of the new bearingless machine is set up,and the simulation results verified the feasibility of this novel bearingless motor. 展开更多
关键词 Air-gap-flux-oriented control bearingless motor MULTIPHASE Radial force Single set of windings Modified winding function method
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Dynamic Analysis Model of Embedded Fluid Elastomeric Damper for Bearingless Rotor 被引量:2
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作者 Wu Shen Yang Weidong Li Ruirui 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2016年第5期552-558,共7页
According to the structural characteristics of embedded fluid elastomeric damper and dynamic modeling method of bearingless rotor(BR)system,a time-domain dynamic model based on multilayer elastomeric theory and fluid ... According to the structural characteristics of embedded fluid elastomeric damper and dynamic modeling method of bearingless rotor(BR)system,a time-domain dynamic model based on multilayer elastomeric theory and fluid dynamic equations is developed.The parameters contained in the analysis model are identified by dynamic experiment data of embedded fluid elastomeric damper.The dynamic characteristics curves calculated through dynamic model are compared with those derived from experimental data.The consistent results illustrate that the model can describe the nonlinear relationship between stress and strain of embedded fluid elastomeric damper under different displacement amplitude and frequency.Due to the validity and reliability of the dynamic analysis model,it can be used in aeroelastic characteristics calculation of BR with embedded fluid elastomeric damper for helicopters. 展开更多
关键词 HELICOPTER bearingless rotor(BR) embedded fluid elastomeric damper nonlinear dynamics characteristics
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Two Different Role Division Control Strategies for Torque and Axial Force of Conical Bearingless Switched Reluctance Motor 被引量:1
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作者 HAO Zhenyang MIAO Wei +1 位作者 CAO Xin ZHANG Qiyao 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第6期848-857,共10页
Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.The... Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.Therefore,it is difficult to make the rotor rotate and be fully levitated simultaneously.To solve this problem,two different role division control strategies are proposed in this paper,i.e.individual role division and mutual role division control strategies.The difference between them is the selection of motor which controls the torque or the axial force.In order to understand the characteristics of control variables,the principle and mathematical model of CBSRM are introduced.After that,two control strategies are explained in detail.To verify the demonstrated performance,the simulations are completed with MATLAB/Simulink. 展开更多
关键词 five-degree-of-freedom magnetic levitation conical bearingless switched reluctance motor(CBSRM) individual role division control mutual role division control
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Design and Analysis of Asymmetric Rotor Pole Type Bearingless Switched Reluctance Motor 被引量:1
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作者 Zhenyao Xu Qingguo Yu Fengge Zhang 《CES Transactions on Electrical Machines and Systems》 CSCD 2022年第1期3-10,共8页
Bearingless switched reluctance motor(BSRM) not only combines the merits of bearingless motor(BM) and switched reluctance motor(SRM), but also decreases the vibration and acoustic noise of SRM, so it could be a strong... Bearingless switched reluctance motor(BSRM) not only combines the merits of bearingless motor(BM) and switched reluctance motor(SRM), but also decreases the vibration and acoustic noise of SRM, so it could be a strong candidate for high-speed driving fields. Under the circumstances, a 12/14 BSRM with hybrid stator pole has been proposed due to its high output torque density and excellent decoupling characteristics between torque and suspension force. However, this motor has torque dead-zone, which leads to problems of self-start at some rotor positions and large torque ripple during normal operation. To solve the existing problems in the 12/14 type, an asymmetric rotor pole type BSRM is proposed. The structure and design process of the proposed motor is presented in detail. The characteristics of the proposed motor is analyzed and compared with that of the 12/14 type. Furthermore, prototype of the proposed structure is designed, manufactured and experimented. Finally, simulation and test results are illustrated and analyzed to prove the validity of the proposed structure. 展开更多
关键词 Asymmetric rotor pole bearingless switched reluctance motor self-start torque ripple reduction
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Comprehensive Analysis of Suspending Force for Improved Bearingless Switched Reluctance Motor with Permanent Magnets in Stator Yoke
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作者 Fangxu Li Huijun Wang +1 位作者 Fengge Zhang He Zhang 《CES Transactions on Electrical Machines and Systems》 2018年第4期348-354,共7页
Different from conventional switched reluctance motor(SRM),bearingless SRM not only provides torque but also supplies levitation force for free-friction of rotor.In order to make sure that bearingless SRM can steadily... Different from conventional switched reluctance motor(SRM),bearingless SRM not only provides torque but also supplies levitation force for free-friction of rotor.In order to make sure that bearingless SRM can steadily levitates in static and dynamic rotating operation,it is necessary to analyze suspending force.Therefore,suspending force performance of an improved bearingless SRM with permanent magnets in stator yoke is comprehensively investigated in this paper.Basic structure and operation principle with permanent magnets in stator yoke are introduced firstly.Furthermore,mathematical model is built up for design of suspending force.In addition,parametric analysis for levitation performance is implemented.Finally,validity of proposed method is verified by experimental results. 展开更多
关键词 ANALYSIS bearingless switched reluctance suspending force
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Decoupling Control of 5 Degrees of Freedom Bearingless Induction Motors Using α-th Order Inverse System Method 被引量:25
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作者 ZHU Huang-Qiu ZHOU Yang LI Tian-Bo LIU Xian-Xing 《自动化学报》 EI CSCD 北大核心 2007年第3期273-278,共6页
A 5-degrees-of-freedom bearingless induction motor is a multi-variable,nonlinear and strong-coupled system.In order to achieve rotor suspension and operation steadily,it is necessary to realize dynamic decoupling con... A 5-degrees-of-freedom bearingless induction motor is a multi-variable,nonlinear and strong-coupled system.In order to achieve rotor suspension and operation steadily,it is necessary to realize dynamic decoupling control among torque and suspension forces.In the paper,a method based on α-th order inverse system theory is used to study dynamic decoupling control.Firstly,the working principles of a 3-degrees-of-freedom magnetic bearing and a 2-degrees-of-freedom bearinglees induction motor are analyzed, the radial-axial force equations of 3-degrees-of-freedom magnetic bearing,the electromagnetic torque equation and radial force equations of the 2-degrees-of-freedom bearingless induction motor are given,and then the state equations of the 5-degrees-of-freedom bearingless induction motor are set up.Secondly,the feasibility of decoupling control based on dynamic inverse theory is discussed in detail,and the state feedback linearization method is used to decouple and linearize the system.Finally,linear control system techniques are applied to these linearization subsystems to synthesize and simulate.The simulation results have shown that this kind of control strategy can realize dynamic decoupling control among torque and suspension forces of the 5-degrees-of-freedom bearingless induction motor,and that the control system has good dynamic and static performance. 展开更多
关键词 自动化控制 反映线性化 轴承 反馈机制
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宽转子极无轴承开关磁阻电机径向力模型全周期拓展 被引量:1
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作者 周云红 王东 +2 位作者 黄飞 孙玉坤 谭正一 《电机与控制学报》 EI CSCD 北大核心 2024年第2期182-190,共9页
针对单绕组宽转子极无轴承开关磁阻电机在定转子极非完全交叠区间的径向悬浮力模型空白、已有定转子极完全交叠区间径向悬浮力模型推导过程复杂且计算量大的不足,首先通过磁场有限元分析,分别确定了该电机在定转子非完全交叠区间和完全... 针对单绕组宽转子极无轴承开关磁阻电机在定转子极非完全交叠区间的径向悬浮力模型空白、已有定转子极完全交叠区间径向悬浮力模型推导过程复杂且计算量大的不足,首先通过磁场有限元分析,分别确定了该电机在定转子非完全交叠区间和完全交叠区间的电磁场几何分布,计算了气隙磁密,再根据麦克斯韦应力法分别推导了这2个区间的径向力表达式,从而建立该电机在一个完整周期范围内的径向力数学模型,并通过与三维有限元计算结果的对比验证该模型的准确性。相比于利用等效磁路图推导径向力模型而言,该建模过程更简便,计算量也更小。全周期径向力模型的建立,不仅能为电机本体和控制器设计提供理论参考,还有助于提高该电机控制策略设计的灵活性,也可以提高与传统单绕组无轴承电机控制器的通用性。 展开更多
关键词 无轴承开关磁阻电机 单绕组 宽转子 径向力 全周期 麦克斯韦应力
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采用改进遗传算法优化LS-SVM逆系统的外转子无铁心无轴承永磁同步发电机解耦控制 被引量:1
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作者 朱熀秋 沈良瑜 《中国电机工程学报》 EI CSCD 北大核心 2024年第5期2037-2046,I0032,共11页
为了实现外转子无铁心无轴承永磁同步发电机(outer rotor coreless bearingless permanent magnet synchronous generator,ORC-BPMSG)的精确控制,提出一种基于改进遗传算法(improved genetic algorithm,IGA)优化最小二乘支持向量机(leas... 为了实现外转子无铁心无轴承永磁同步发电机(outer rotor coreless bearingless permanent magnet synchronous generator,ORC-BPMSG)的精确控制,提出一种基于改进遗传算法(improved genetic algorithm,IGA)优化最小二乘支持向量机(least square support vector machine,LS-SVM)逆系统的解耦控制策略。首先,基于ORC-BPMSG的结构及工作原理,推导其数学模型,并分析其可逆性。其次,建立LS-SVM回归方程,并采用IGA优化LS-SVM的性能参数,从而训练得到逆系统。然后,将逆系统与原系统串接,形成伪线性系统,实现了ORC-BPMSG的线性化和解耦。最后,将提出的控制方法与传统LS-SVM逆系统控制方法进行对比仿真和实验。仿真和实验结果表明:所提出的控制策略可以较好地实现ORC-BPMSG输出电压和悬浮力、以及悬浮力之间的解耦控制。 展开更多
关键词 外转子无铁心无轴承永磁同步发电机 最小二乘支持向量机 逆系统 改进遗传算法 解耦控制
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基于LDC1101的电涡流传感器设计
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作者 姜迪开 孟淑平 +2 位作者 许文波 黄淑贤 杨鑑 《传感器与微系统》 CSCD 北大核心 2024年第5期71-74,共4页
传统的模拟式电涡流传感器存在容易受到干扰、电路设计复杂的问题而利用现场可编程门阵列(FPGA)或复杂可编程逻辑器件(CPLD)软件实现测量电路和输出信号的数字式电涡流传感器调试复杂的问题。针对以上问题,设计了基于LDC1101的数字化电... 传统的模拟式电涡流传感器存在容易受到干扰、电路设计复杂的问题而利用现场可编程门阵列(FPGA)或复杂可编程逻辑器件(CPLD)软件实现测量电路和输出信号的数字式电涡流传感器调试复杂的问题。针对以上问题,设计了基于LDC1101的数字化电涡流传感器,实现载波信号发生和测量信号解调于一体,并把测量结果通过SPI通信传输给控制器。每个传感器模块由1个LDC1101芯片、1个电涡流传感线圈和1个匹配电容组成。极大简化了电路设计以及调试难度。此传感器测量方法已用于无轴承永磁电机的悬浮控制中对转子磁钢的径向位置测量中。通过4只传感器安装在信号采集电路板上,差分测量然后计算出转子的x和y位置。试验结果表明,该方法分辨率高,可靠性好。 展开更多
关键词 电涡流传感器 无轴承薄片电机 悬浮控制 分辨率
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宽转子无轴承开关磁阻电机的计及磁饱和径向力模型
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作者 周云红 谭正一 +1 位作者 王东 李汉杰 《电机与控制应用》 2024年第2期90-102,共13页
针对无轴承开关磁阻电机现有的基于无磁饱和假设的数学模型只适用于未磁饱和工况的缺点,为宽转子单绕组无轴承开关磁阻电机建立了一种可以计及磁饱和影响的全周期径向力数学模型。首先依据该电机的磁场有限元分析结果,基于麦克斯韦应力... 针对无轴承开关磁阻电机现有的基于无磁饱和假设的数学模型只适用于未磁饱和工况的缺点,为宽转子单绕组无轴承开关磁阻电机建立了一种可以计及磁饱和影响的全周期径向力数学模型。首先依据该电机的磁场有限元分析结果,基于麦克斯韦应力法求出了径向力关于气隙磁密的表达式;然后对铁心材料的非线性磁化特性进行拟合,再根据该电机的等效磁路计算了计及磁饱和影响的气隙磁密;之后建立了该电机的径向力模型,并在对比分析了边缘气隙磁密和主气隙磁密对径向力的影响后,对所建径向力模型进行简化,以减小计算量和复杂度。最后利用三维有限元分析进行验证,结果表明所建径向力模型对该电机未磁饱和、部分磁饱和以及完全磁饱和工况均适用。计及磁饱和的全周期径向力模型的建立,可以为电机运行特性分析、本体优化设计以及控制策略研究提供更准确的理论参考。 展开更多
关键词 开关磁阻电机 无轴承电机 宽转子 径向力模型 磁饱和 全周期
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Modeling of bearingless permanent magnet synchronous motor based on mechanical to electrical coordinates transformation 被引量:8
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作者 ZHU HuangQiu CHENG QiuLiang WANG ChengBo 《Science China(Technological Sciences)》 SCIE EI CAS 2009年第12期3736-3744,共9页
A bearingless permanent magnet synchronous motor(BPMSM)has two sets of stator windings,torque windings and suspension force windings.By analyzing the flux linkage intersection between the two sets of windings,a method... A bearingless permanent magnet synchronous motor(BPMSM)has two sets of stator windings,torque windings and suspension force windings.By analyzing the flux linkage intersection between the two sets of windings,a method of transforming mechanical coordinates to electrical coordinates is put forward.According to this method,flux linkage equations and voltage equations of the two stator windings are derived.The electromagnetic torque equation of the BPMSM is derived based on the analysis of the role of Lorentz force in the BPMSM.After analyzing the mathematical formula of various sort radial forces in the BPMSM,a complete function of radial suspension forces for the BPMSM is obtained.Finally,an experimental system control diagram and some test results are discussed.This mathematical model provides a theoretical foundation for BPMSM simulation study,experiment waveform analysis and structure design. 展开更多
关键词 PERMANENT MAGNET synchronous MOTOR bearingless MOTOR flux LINKAGE EQUATION voltage EQUATION electromagnetic torque EQUATION suspension force EQUATION
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一种定子单绕组无轴承开关磁阻电机的转子位移控制方法
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作者 王川川 张峻豪 +3 位作者 金璐 牛赵翔 杜军成 王惠军 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2024年第3期289-299,共11页
提出了一种用于定子单绕组无轴承开关磁阻电机(Bearingless switched reluctance motor,BLSRM)的转子位移控制方法。首先介绍了定子单绕组无轴承开关磁阻电机的基本结构和工作原理,基于等效磁路法建立悬浮力和刚度的数学模型。其次,建... 提出了一种用于定子单绕组无轴承开关磁阻电机(Bearingless switched reluctance motor,BLSRM)的转子位移控制方法。首先介绍了定子单绕组无轴承开关磁阻电机的基本结构和工作原理,基于等效磁路法建立悬浮力和刚度的数学模型。其次,建立了转子动力学模型以获取悬浮力与转子位移间的关系模型。最后,设计了一台实验样机并在电机上进行悬浮控制实验。实验结果验证了所提控制方法的有效性。 展开更多
关键词 无轴承开关磁阻电机 转子位移 单饶组定子 控制
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单霍尔故障下无轴承永磁薄片电机径向位移容错检测
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作者 赵攀 王宇 张艺 《电工技术学报》 EI CSCD 北大核心 2024年第15期4794-4805,共12页
由于人工无轴承心脏泵要求微型化,所以心脏泵系统不能采用大体积的电涡流传感器来采集径向位移信息。基于霍尔测径向位移的无轴承永磁薄片电机采用霍尔同时辨识转角和径向位移,大幅降低系统体积。霍尔输出信号直接影响无轴承电机悬浮性... 由于人工无轴承心脏泵要求微型化,所以心脏泵系统不能采用大体积的电涡流传感器来采集径向位移信息。基于霍尔测径向位移的无轴承永磁薄片电机采用霍尔同时辨识转角和径向位移,大幅降低系统体积。霍尔输出信号直接影响无轴承电机悬浮性能,当单个霍尔传感器故障时,由于缺失一相磁链导致电机失浮。为了提高基于霍尔测径向位移的无轴承永磁薄片电机容错能力,该文针对单霍尔传感器故障时角度和径向位移信息会重新耦合,难以高精度分离的问题,提出基于谐波补偿的霍尔磁链重构算法。首先,采用磁链重构思想,利用剩余非故障霍尔重构解算径向位移的一相磁链;然后,对上述重构磁链中不偏心3次谐波进行补偿,并构建霍尔矫正表求解径向位移;最后,搭建实验平台,通过仿真和实验验证了所提算法的准确性。 展开更多
关键词 无轴承永磁薄片电机 径向位移 霍尔传感器 容错控制 谐波补偿
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混合励磁磁悬浮开关磁阻电机转矩建模与分析
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作者 欧钰 项倩雯 《电子测量技术》 北大核心 2024年第2期9-16,共8页
针对传统磁悬浮开关磁阻电机的输出转矩小及转矩与悬浮的耦合问题,提出一种四相16/14/8极混合励磁双定子磁悬浮开关磁阻电机。介绍了该电机的拓扑结构、转矩原理与悬浮原理,并优化了转矩绕组的励磁方式,运用有限元法比较分析了该电机与... 针对传统磁悬浮开关磁阻电机的输出转矩小及转矩与悬浮的耦合问题,提出一种四相16/14/8极混合励磁双定子磁悬浮开关磁阻电机。介绍了该电机的拓扑结构、转矩原理与悬浮原理,并优化了转矩绕组的励磁方式,运用有限元法比较分析了该电机与同参数不加永磁体电机的电磁特性,包括电机的转矩特性以及解耦特性,仿真结果验证了该电机自解耦结构的合理性及能有效提高输出转矩。在麦克斯韦应力法基础上,根据电机工作时的磁通分布建立了等效磁路图,采用分段函数拟合铁芯磁化曲线,推导出了考虑磁饱和的转矩数学模型,有限元仿真分析验证了转矩模型与仿真结果较吻合,最小相差约1.4%,最大相差约26%。 展开更多
关键词 混合励磁 磁悬浮开关磁阻电机 麦克斯韦应力法 磁饱和
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高速高功率密度无轴承永磁薄片电机设计与优化
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作者 李健 陈红 +2 位作者 李大伟 裴同豪 刘嘉韵 《电机与控制学报》 EI CSCD 北大核心 2024年第6期171-180,共10页
传统无轴承电机在高速和高功率密度之间难以取得平衡,为此围绕高速高功率密度无轴承永磁薄片电机,对其拓扑结构、绕组形式、主要尺寸等方面进行优化设计,在保证转速和功率密度的基础上有效地提升悬浮性能。通过对运行工况的分析,得出电... 传统无轴承电机在高速和高功率密度之间难以取得平衡,为此围绕高速高功率密度无轴承永磁薄片电机,对其拓扑结构、绕组形式、主要尺寸等方面进行优化设计,在保证转速和功率密度的基础上有效地提升悬浮性能。通过对运行工况的分析,得出电机拓扑结构需具备的基本特点,提出一种采用环形集成绕组的表贴式无轴承永磁薄片电机。在兼顾转矩和悬浮力输出性能、机械防护可靠性的基础上,对电机的电磁气隙长度和永磁体参数等主要尺寸进行优化设计。针对电机饱和、绕组端部伸出等不利因素,分别采取了超前角弱磁、定子略长的性能提升策略,有效地避免了悬浮力的大幅度跌落。搭建20 000 r/min的无轴承永磁薄片电机有限元仿真模型并制造实物样机。通过对电磁转矩和主、被动悬浮力的分析,证明了本文设计的无轴承永磁薄片电机兼具良好的转矩与悬浮力输出性能,单位幅值电流产生的电磁转矩、主动悬浮力分别为0.166 N·m、4.4 N,电机输出功率10 kW、功率密度5.2 kW/kg。 展开更多
关键词 无轴承永磁薄片电机 高速高功率密度 环形绕组 优化设计 弱磁控制 端部效应
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基于梁模型的无轴承尾桨等效建模及模态分析
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作者 张英琦 周如传 +1 位作者 黄国科 李晓彬 《直升机技术》 2024年第3期11-17,共7页
无轴承尾桨叶开展模态试验时,出现同一阶对称型与反对称型摆振频率差异较大的现象。为了揭示频率出现差异的原因,对该无轴承尾桨叶进行有限元分析与试验研究。建立无轴承尾桨有限元模型时,考虑到无轴承尾桨多路传力方式及根部边界约束... 无轴承尾桨叶开展模态试验时,出现同一阶对称型与反对称型摆振频率差异较大的现象。为了揭示频率出现差异的原因,对该无轴承尾桨叶进行有限元分析与试验研究。建立无轴承尾桨有限元模型时,考虑到无轴承尾桨多路传力方式及根部边界约束复杂的特点,采用分步式建模方法:第一步基于静力缩聚方法对柔性梁根部夹持区等效梁进行计算,获得根部剖面等效刚度;第二步基于三维等效梁模型计算方法,采用ABAQUS软件建立无轴承尾桨的有限元梁模型。对不同根部边界约束下的无轴承尾桨动特性进行了分析研究,并开展了不同根部边界条件下的静态动特性试验,计算结果与试验结果吻合良好。研究结果表明:柔性梁根部边界条件对桨叶摆振模态频率影响较大,是桨叶出现同一阶对称型与反对称型摆振频率较大差异的原因;分步式建模方法可以兼顾无轴承尾桨动特性计算的精确性和计算效率,满足工程设计需求。 展开更多
关键词 直升机 无轴承尾桨 有限元建模 模态分析
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基于PID控制器的无轴承异步电机控制策略研究
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作者 曾明杰 高运昌 吴亚鹏 《微电机》 2024年第8期26-30,共5页
无轴承异步电机(Bearingless Induction Motor,BIM)具有摩擦小、无需润滑、运转速度高等优点,具有重要的研究和应用价值。但是相对于传统异步电机,无轴承异步电机的数学模型是一个强耦合、多变量、非线性的高阶函数,导致其控制策略相对... 无轴承异步电机(Bearingless Induction Motor,BIM)具有摩擦小、无需润滑、运转速度高等优点,具有重要的研究和应用价值。但是相对于传统异步电机,无轴承异步电机的数学模型是一个强耦合、多变量、非线性的高阶函数,导致其控制策略相对复杂。为此,本文研究了一种基于PID控制器的无轴承异步电机气隙磁场定向控制策略,对其控制原理和实现方法进行了详细的论述,采用Matlab仿真软件对其有效性进行了验证,并基于TMS320F28335搭建了实验平台,对控制效果进行了验证。 展开更多
关键词 无轴承异步电机 PID控制器 气隙磁场定向控制 实验研究
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基于灰狼算法的无轴承永磁同步电机多目标优化
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作者 周晓燕 张庭恺 +2 位作者 朱来澳 卢庆轩 吴昊昱 《微特电机》 2024年第1期31-35,42,共6页
为了降低无轴承永磁同步电机的悬浮脉动并提高电机的转矩,使其性能更加优越,提出了基于解析-灰狼算法对电机进行多目标优化设计。通过对比解析法和有限元法的计算结果,验证了解析法计算的准确性。将电机的气隙宽度、槽口宽度、极弧系数... 为了降低无轴承永磁同步电机的悬浮脉动并提高电机的转矩,使其性能更加优越,提出了基于解析-灰狼算法对电机进行多目标优化设计。通过对比解析法和有限元法的计算结果,验证了解析法计算的准确性。将电机的气隙宽度、槽口宽度、极弧系数和永磁体厚度4个变量作为优化参数对电机进行多目标优化。对比优化前后的结果,电机的悬浮力脉动和转矩得到了明显的改善,验证了该算法的可行性。 展开更多
关键词 无轴承永磁同步电机 灰狼算法 解析法 多目标优化
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