共查询到20条相似文献,搜索用时 31 毫秒
1.
超高速开关磁阻电动机设计 总被引:4,自引:0,他引:4
开关磁阻电机结构简单坚固,转子上无永磁体和绕组,特别适合超高速运行。针对超高速电机的运行特点,对超高速开关磁阻电机的多物理场一体化设计方法进行探讨,研制了一台6/2结构超高速开关磁阻样机,样机最高转速为130 000 r/min,功率为1 kW。为提高样机的起动转矩,改进了样机的转子结构,并基于有限元法对样机的电磁性能和动力学性能进行优化。采用自主开发的具有角度控制功能的开关磁阻电机专用集成电路SR3P10K07A作为控制系统的控制核心。最后对样机进行了实验,实验结果表明本文采用的设计方法、转子结构和专用芯片是可行和有效的。 相似文献
2.
传统气压制动系统存在压缩机、制动油箱和空气管路,占据较大空间,而采用电子机械制动(EMB)系统代替,不但可以减小空间,还能实现对夹紧力的快速响应和精确控制。以纯电动城市客车为目标车型,讨论了EMB执行机构方案,根据传统气压盘式制动器最大夹紧力推导出电机的堵转转矩和空载转速。据此设计了永磁无刷直流驱动电机,堵转转矩为10 N·m,空载转速为370 r/min。在Maxwell 2D中搭建驱动电机有限元模型,分析电机在消除间隙阶段和夹紧力增加阶段的制动性能。结果表明所设计的驱动电机制动性能可满足要求。 相似文献
3.
A high-performance fully digital controller has been designed for the control of a switched reluctance (SR) motor built for vehicle propulsion. The SR machine is specifically designed and built to have high density and low noise. The controller is designed to maximize the machine efficiency, the peak overload capability, and to minimize torque ripple at low speed. Lookup tables are stored in a digital-signal-processor-based controller to calculate the control parameters online. Three interpolations, between torque command, motor speed, and battery voltage, are performed to obtain the control parameters. Difficulties associated with the interpolation scheme are addressed. A high-bandwidth fully digital proportional plus integral current regulator has been designed for the control of the phase current. Advantages as well as the difficulties with the operation of the SR machine and its control have been addressed. A complete characterization of the controller for the entire torque-speed plane has been made through extensive dyno testing. Simulation and dyno test results have been presented to demonstrate the performance of this controller. 相似文献
4.
5.
针对传统双电机控制系统中,运动惯性以及响应不及时等影响速度同步精度和动态响应速度的问题,本文提出了一种双永磁同步电机系统非级联预测速度同步控制策略,将双电机系统看作一个多输入多输出系统进行统一建模,应用有限控制集模型预测控制设计一个紧凑的双电机系统控制器,并将速度同步误差、速度跟踪误差和电机运行性能同时引入模型预测控制的价值函数中,实现多变量的协同优化控制。此外,为满足实际用户需求,引入弱磁、电流限制两个前端模块实现对电压、电流的约束。最后通过仿真进行了转速阶跃信号跟踪、抗负载扰动等对比验证,结果证明所提出的非级联预测速度同步控制策略较传统交叉耦合控制策略能够更有效提升双永磁同步电机系统的转速同步控制性能 相似文献
6.
传统异步电机闭环控制中转速和磁链外环采用比例积分(PI)控制,针对其有超调和动态响应慢等问题,提出了一种新型的滑模控制器用于外环转速和磁链控制,改善了动态性能.采用五阶扩展卡尔曼滤波(EKF)来估计转速和磁链并用于闭环反馈,进一步研究了引入转矩观测后的六阶EKF,考察了转动惯量对速度估计的影响,在三电平逆变器驱动异步电机平台上进行了各种实验.结果表明,基于EKF和滑模控制的无速度传感器控制系统在较宽的速度范围内具有良好的动静态性能. 相似文献
7.
基于ASIC的高速开关磁阻电机数字控制器 总被引:1,自引:0,他引:1
为了提高高速开关磁阻电机(SRM)控制器的系统性能,简化控制电路,设计了一种具有角度控制功能的专用集成电路(ASIC)SR3P10K07A.基于ASIC,开发了一套高速SRM数字控制器.其转子位置信号处理、角度解算等功能由SR3P10K07A完成,执行效率高、抗干扰能力强.而微处理器(MCU)仅负责控制算法实现和状态检测等功能,对MCU的资源需求大幅减少,因此可选用单片机(SCM)来实现高速SRM的实时控制.最后,该控制器在一台高速SRM样机上进行了实验,样机最高转速达到130 000 r/min.试验结果表明,所设计的数字控制器可有效满足高速SRM的控制要求. 相似文献
8.
介绍了锁相环技术在直流电机调速系统中的应用,提出了一种基于锁相环的新型频率直流电机调速系统控制电路,通过转速仪实现对电动机转子相位的锁相控制,并给出了电路参数的计算方法.锁相环技术用于直流电机的调速系统具有良好的动态性能和较高的稳态精度. 相似文献
9.
A self-controlled synchronous motor, which has similar characteristics to a conventional dc motor, is being used in various industrial fields as an adjustable speed motor. The inductances in the motor are changed with change in the air-gap flux due to magnetic saturation (as in a field-weakening region). A new and simple formula representing the inductances (i.e., reactances), in which the effect of magnetic saturation is taken into account, is proposed in this paper. The validity of the formula is shown for the transient performances of a tested motor when the field voltage was stepped down. The effects of magnetic saturation on the steady-state and dynamic performances are then clarified for a motor having average constants of synchronous machines. It is shown that the steady-state motor speed for small values of dc input current when the magnetic saturation is considered is larger than that for constant parameters. It is also clarified that the field-weakening speed control regions for constant-power driving become narrow if the motor has the property of considerable magnetic saturation. The transient responses when dc input and field voltages are changed, respectively, are finally investigated; it is shown that if magnetic saturation is considered, the commutation limit of inverter thyristors for a step-down change in the field voltage is widened when compared with the case for constant parameters. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 118 (2): 56–69, 1997 相似文献
10.
11.
A Servo-Control System Using a Self-Controlled Synchronous Motor (SCSM) with Sliding Mode Controller
The application of sliding mode control for improving the dynamic response of a self-controlled synchronous motor (SCSM) based position servo system is presented. Sliding mode control gives fast dynamic response with no overshoot and zero steady-state error. It has the important feature of being highly robust, i.e., insensitive to plant parameter variations and external disturbances. A design procedure is outlined for the sliding mode controller for a servo driving using the self-controlled synchronous motor. A novel scheme for fast torque reversal is proposed and implemented. Digital computer simulation of the overall position control system is carried out using a time domain model in the d-q reference frame. The rigorous simulation of the servo system with sliding mode control shows the existence of limit cycles in the position response with certain type of speed encoder. Experimental results are provided for a 3-hp synchronous motor based servo drive. The sliding mode controller is implemented using a single-board microcomputer which controls a GTO thyristor current source inverter to drive the motor. 相似文献
12.
电力牵引异步电动机无速度传感器间接定子量控制 总被引:3,自引:0,他引:3
在异步电动机等效电路模型基础上阐述间接定子量控制的数学关系,论述全速度区域的间接定子量控制方案及恒功弱磁区的动态弱磁方法.采用一种基于Luenberge观测器的转速自适应估计算法,构建无速度传感器间接定子量控制系统.针对在电力牵引中无速度传感器控制系统必须能在异步电动机任何未知转速时重新投入工作,给出了一种初始转速自优化搜索算法.利用TMS320C31和TMS320F240构成的双微机控制系统,对所提出的方案实施了全数字化控制.试验结果表明,该无速度传感器间接定子量控制系统具有优异的动、静态性能. 相似文献
13.
混合式步进电动机(HSM)在工业领域中应用广泛,其同步电频率已达1 kHz以上。受数字控制系统的采样频率限制,当电机高速运行时,采样频率与同步频率之比很小,导致电流控制环不能正常工作,限制了电机运行速度的提高及负载能力的提升。这里针对HSM矢量控制系统提出一种电流预测及其控制方案;为进一步拓展电机速度运行范围,这里还研究了弱磁控制策略。实验结果表明电机速度运行范围宽广,动态响应迅速。 相似文献
14.
针对经典控制理论设计的速度调节器与实际调试结果出入大,以及在速度阶跃过程中速度调节器的饱和问题,提出用线性二次型状态反馈的设计思想,实现伺服系统速度调节器的设计。在速度调节器饱和过程中,采用棒棒控制实现响应时间的最小化。为保证动态过程中系统速度调节器的平稳过渡,合理选择调节器的转换阀值,并引入速度微分反馈控制,可以在不影响系统响应快速性的前提下抑制超调与振荡。在电机速度阶跃过程中,加大系统动态过程中的限幅力矩,使系统的响应更快,响应时间更短。数字仿真和实验均证实了文中所做分析与设计的有效性。 相似文献
15.
16.
在永磁同步电动机数学模型和最大转矩电流比(MTPA)控制理论基础上,通过优化算法研究了一种近似最大转矩电流比控制,对转矩电流关系进行线性化,便于工程应用。为了改善传统PI调节系统的动态性能,采用一种智能PI调节器作为系统的转速外环控制器。仿真结果表明:近似最大转矩电流比控制性能接近最大转矩电流比控制,相同的负载扰动下智能PI控制系统的动态速降和恢复时间均小于传统PI控制系统。 相似文献
17.
18.
Recent developments of high-energy permanent magnet (PM) materials such as neodymium-iron-boron have focused attention on the use of PM synchronous motors supplied from inverters for a wide variety of speed control applications. PM motor drives are readily applicable where full torque is required up to full or base speed. They are, however, limited in their ability to operate in the power-limited regime where the available torque is reduced as the speed is increased above its base value. In contrast with the field weakening approach used in dc drives, the magnet is permanent. The torque-speed operating limits of PM motor drives, of conventional design are explored, and then design measures which can substantially extend operation into the power-limited regime are proposed. A trade-off between the low speed-torque limit and the extent of the speed range above base speed is achieved by variations in magnet dimensions and the depth of inset of the magnets in the rotor iron. Experimental results are presented for two motors of different design, each using neodymium magnets and each supplied from a current-controlled inverter with hysteresis control of current waveshape. 相似文献
19.
为提高直驱式永磁同步电机(DD-PMSM)的动态响应性能,提出了一种改进型无差拍直接转矩控制(DB-DTC)策略。改进型DB-DTC在保留传统DB-DTC动态响应性能的基础上,简化了控制过程,降低了实时计算量。通过在MATLAB/Simulink 环境下搭建仿真模型,对传统DB-DTC和改进型DB-DTC的控制效果进行对比,并将改进型DB-DTC结合位置型阻抗控制策略,验证控制策略的优越性。仿真结果表明,在位置控制模式下,相对于传统DB-DTC,所提控制策略的电机转动至给定角度以及转速降为零所需的时间减少0.002 s,稳态运行角度误差减少0.02°。在速度控制模式下,相对于传统DB-DTC,所提控制策略的电机达到给定转速的时间减少0.004 s,稳态转速误差降低0.03 r/min,稳态转速波动降低0.06 r/min,在电机进入稳态运行以后,q轴电流峰值降低0.193 A,q轴的电流脉动降低0.204 A。电机控制系统具有更好的动态性能和更强的抗干扰能力。 相似文献
20.
无刷直流电机调速系统神经网络逆控制 总被引:2,自引:0,他引:2
无刷直流电机运行中参数摄动和换相过程的非线性,在一定程度上限制了其调速性能。针对这些特点,在分析无刷直流电机换相区和传导区数学模型的基础上,提出了一种基于神经网络逆的控制策略,采用静态神经网络加积分器来构造电机的逆系统,并将该逆系统与原电机系统串联复合构成伪线性系统,实现整体的近似线性化,从而简化了外环控制器的设计难度。仿真与实验结果均表明神经网络逆控制方法对负载扰动与电机参数摄动有较强的鲁棒性,且能在减小转速超调的同时保证了响应速度及跟踪精度,使整个系统具有优良的动静态性能。 相似文献