共查询到20条相似文献,搜索用时 0 毫秒
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A production variable-frequency drive is described which uses an induction motor and a controlled-current inverter. The control loops of the drive have been arranged so that the performance of the drive is extended to zero speed and to the theoretical upper limit speed. Operating modes include torque smoothing by programmed dc link current, pulsewidth modulated (PWM) current shaping, and flux-controlled constant horsepower operation. 相似文献
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Le-Huy Hoang Jakubowicz Alain Perret Robert 《Industry Applications, IEEE Transactions on》1982,(1):46-53
A current-fed self-controlled synchronous motor drive is described, in which the motor terminal voltage is used to synchronize the inverter triggering pulses. Power-factor optimization control strategy is studied, and its implementation in a microprocessor-based control system is described. Analysis of the z-domain using linearized models for system components is presented. Experimental results are given. 相似文献
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Slemon Gordon R. Forsythe J. B. Dewan Shashi B. 《Industry Applications, IEEE Transactions on》1973,(2):216-219
This paper describes a controlled-power-angle synchronous motor inverter system which provides drive characteristics similar to those of an induction motor inverter system. The system consists of a conventional synchronous motor with a shaft-position sensor which controls the firing of thyristors in an inverter. This paper investigates the steady-state properties and control strategies for the controlled-angle synchronous motor inverter system. Some experimental results are presented and compared with theoretical predictions. 相似文献
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在磁场定向控制的永磁同步电动机数学模型上,利用一种增广的数学模型,将滑模变结构和二次型最优方法结合进行位置控制。提高了系统在外部负载干扰和系统参数变化下的鲁棒性和控制精度;同时证明了该控制方式下系统的稳定性。实验结果表明:该方法实现简单,具有较好的位置响应和抗干扰能力。 相似文献
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本文以永磁同步电动机为基础,研究了直接滑模电流控制策略,该策略对参数变化以及外界干扰的鲁棒性较强,从而广泛应用于电气传动控制领域.设计了新颖的直接滑模电流控制器代替传统的PI电流控制器,并且采用了开关表查询方式加快了动态响应速度.最后基于TMS320DSP28335控制器对永磁同步电动机直接滑模电流控制控制系统进行实验验证,结果表明所设计的控制器动态响应较快,抗干扰能力较强. 相似文献
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An Intel 8086 microcomputer-based pulsewidth modulator (PWM) is described which receives digital voltage and frequency commands independently at the input, generates precision three- phase PWM waves at the output, and can be used to drive a transistor or thyristor inverter for ac drive systems. A computation intensive uniform sampling technique is used in the low-frequency region, whereas the higher frequency region is based on word recognition and pattern retrieval method. A laboratory breadboard of the modulator has been built and tested for the frequency range 0-250 Hz with resolution of 0.0077 Hz and smooth voltage variation up to square wave within a one-percent step in the whole range. The modulator has been extensively tested with a transistor inverter and hybrid computer simulated induction motor drive system and shows performance improvement over the currently available techniques. 相似文献
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Nagase Hiroshi Matsuda Yasuo Ohnishi Kazuo Ninomiya Hisakazu Koike Toshio 《Industry Applications, IEEE Transactions on》1984,(6):1482-1489
A high-performance speed control system for cage induction motors is described which utilizes a PWM inverter. The effects of primary current coincidence and machine constant variation on system characteristics such as response time, torque precision, and operating noise were investigated. Based on the results obtained, new control methods have been devised; one varies the gain of the current controller in proportion to the primary frequency, and a second compensates for the slip frequency by using the deviation between the flux reference value and the actual value. Effectiveness of the compensation methods was confirmed in tests. 相似文献
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A thyristorized dc motor speed control system using phase-locked loop principle is presented. Linear model analysis is given and control performance is studied in terms of system parameters using the root-locus technique. Practical design aspects are discussed, and experimental results obtained with a prototype system intended for a separately excited ?-hp dc motor are given. 相似文献
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Yanzhao He 《电力部件与系统》2017,45(1):99-110
This paper proposes a decoupling controlfor HS-PMSM based on the LS-SVM inverse system.In addition, the on-line LS-SVM inverse controller is developed for the pseudo-linear system. To achieve the high-accuracy stator flux estimation, a stator flux estimator is proposed and implemented for the HS-PMSM. A BPFC is designed to eliminate the magnitude and the phase errors. According to the comparative simulation and experiment results, the utility of the proposed control strategy is demonstrated by the improved decoupling control performance, the enhanced speed tracking performance, the strong load anti-perturbation performance, and the high-accuracy flux estimation at the wide speed range. 相似文献
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介绍一种基于dSPACE半实物仿真技术的舰船电力推进多相感应电机控制系统.本系统在MATLAB/Simulink环境中建立数据采集、驱动、保护等硬件系统的仿真模型和矢量变换、dq轴电流PI调节等相关控制算法,利用dSPACE快速控制原型方法对多相感应电机及其逆变器进行控制,并通过ControlDesk模块开发后期管理和监控平台.15 kW样机试验研究表明,所建立的半实物仿真控制系统稳定、可靠,实时性好,且便于在线修改控制结构和相关参数,为舰船电力推进变频调速系统提供一种可行方案,同时也较好地解决了大型舰船综合电力推进系统的试验室闭环测试问题. 相似文献
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This paper considers recent advances made within the field of electric drives and how this new technology might be best applied within the mining industry. A case study is presented showing simulated results of the performance of the electric drives in a coal preparation plant. The various starting methodologies (resistance starting, fluid coupling, V / f = const, and vector control) are compared within this application. The merits of each method are then discussed with regard to the specific application and other more generic applications within the mining industry. Application of a rotor flux orientation control drive is substantiated, and its superior performance under start and stall conditions to that of the currently implemented system is confirmed by theoretical analysis and simulations. Experimental results for a scale model of the candidate system are presented, which agree with the main conclusions of this paper. 相似文献