共查询到18条相似文献,搜索用时 115 毫秒
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抽油机是油田使用最普及的设备,提高其运行效率是抽油机井节能挖潜增效的有效途径。根据不同抽油机电机运行状态下参数的变化情况,论述了抽油机运行过程中的主要动力设备电动机的运行规律、工作特性,阐述了在抽油机的设计和改造过程中,应以降低抽油机的载荷波动参数为目标,使电机适应于抽油机交变载荷变化的要求,提高功率利用率。同时,对拖动抽油机的异步电动机、同步电动机的机械载荷特性的合理匹配提出建议,用以指导今后抽油机井节能技术的推广应用。 相似文献
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针对目前低产液量井抽油机上应用种类繁杂的调速(低速)技术的现状,我们选取了具有代表性的电磁调速电机、变频器、16极永磁电机,在抽油机井场进行了节电效果的对比测试.根据测试结果和多年对各种调速(低速)技术节电效果的试验情况,分析了目前抽油机上应用的8种调速(低速)技术的不同特点,最后得出了如何在抽油机上优选调速(低速)技术的结论. 相似文献
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稀土永磁同步电动机是一种超高效节能电机 ,我所生产的XYT系列稀土永磁同步电动机其效率超过美国高效电动机的标准。从原理上讲 ,稀土永磁同步电动机要比感应式异步电动机损耗小、效率高 ;但若缺少合理的设计方案、得当的工艺措施、以及优质的电磁材料同样生产不出高品质的产品 ,本文就此加以讨论 相似文献
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<正> 长期以来,油田抽油机一直处于“大马拉小车”状态,抽油机的轻负荷运行,造成了大量的电能浪费。我们把电机Y/△自动切换装置应用于抽油机后,解决了抽油机长期轻负荷运行问题,取得了很好的节电效果。 1 现状调查和分析我厂现有抽油井700口左右,95%为五型抽油机,所配电动机为17kw,抽油机系统年耗电4000×10~4kWh以上,占全厂总用电量的1/ 相似文献
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Characteristic Analysis of Multilayer-Buried Magnet Synchronous Motor Using Fixed Permeability Method 总被引:1,自引:0,他引:1
《Energy Conversion, IEEE Transaction on》2005,20(3):549-555
The direct (d)- and quadrature (q)-axis inductance characteristics of the interior permanent-magnet synchronous motor (IPMSM) are presented, with an emphasis on the cross-coupling effects. Nonlinear variation of phase inductance is investigated, according to the rotor position on entire stator current excitations. We also propose a new analytical method, called the fixed permeability method (FPM). We applied this method (FPM) to steel-cored permanent-magnet linear synchronous motors for large powered linear motional applications. Experimental data were found to corroborate the findings obtained by the FPM method. We also used FPM to analyze magnetic saturation characteristics of the prototype IPMSM, and compared the air-gap flux density and$d$ - and$q$ -axis inductance with the conventional finite element analysis results. 相似文献
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Optimal efficiency control strategy for interior permanent-magnet synchronous motor drives 总被引:2,自引:0,他引:2
In this paper, the problem of efficiency optimization in vector-controlled interior permanent-magnet (PM) synchronous motor drives is investigated. A loss model controller is introduced that determines the optimal d-axis component of the stator current that minimizes power losses. For the implementation of the suggested controller, the knowledge of the loss model is not required since an experimental procedure is followed to determine its parameters. Furthermore, it is shown that the loss model of the interior PM motor can be used as a basis for deriving loss minimization conditions for surface PM synchronous motors and synchronous reluctance motors as well. Experimental results of an interior PM motor are presented to validate the effectiveness of the proposed method and demonstrate the operational improvements. 相似文献
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电网直接供电的普通三相异步电机的特点与抽油机负载的需求不匹配,是抽油机系统效率低下的根源。对电动机进行改进或外加节能装置,可以实现一定程度的节能运行,但往往又会引起新的问题。抽油机系统是比较复杂的系统,系统的节能不仅取决于电动机的效率,而且与输电线路上的损耗、对电网的谐波污染、生产工艺、可靠性及成本等因素有关。本文从系统的角度详细分析了抽油机常用的各种电动机和外加节能装置的节能原理与优缺点,对其进行综合评价,为抽油机节能装置的改进或研制提供借鉴。 相似文献
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Jie Zhou King-Jet Tseng 《Energy Conversion, IEEE Transaction on》2002,17(4):453-462
Single-phase line-start permanent magnet (LSPM) synchronous motors have always been far less amenable to detailed computer-aided performance analysis compared with three-phase LSPM synchronous motors. The main reason is the lack of an accurate mathematical model of the motor characteristics arising from the unbalanced stator field and the rotor saliency. However, there is great potential for these types of motors to replace conventional single-phase induction motors in many domestic applications on account of their higher efficiencies when properly designed. In this paper, a new model that is applicable to both synchronous and asynchronous operation of the motor is proposed in which the parameters can be readily obtained by the two-dimensional (2-D) static finite-element method (FEM). It includes both the forward and backward rotating magnetic fields. It can be used to analyze the torque versus slip characteristics and predict the steady-state performances of the motor quickly with reasonable accuracy. The model has also been extended to simulate the transient start-up process and other dynamic performances. The models are suitable for the initial design and optimization of the motor geometry because of its low run-time overheads. Experimental results have verified the practicability of the models. 相似文献
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游梁式抽油机异步电动机矢量空间节能研究 总被引:2,自引:2,他引:0
提出游梁式抽油机异步电动机矢量控制最小励磁电流控制规律,对取得定子电流最小值的方法进行了证明。该节能控制方案不增加系统硬件成本,根据电动机的负载状态对励磁电流进行调节,使定子电流达到最小值,从而达到电动机自身节能的目的。基于MATLAB/SIMULINK仿真软件进行仿真研究,结果表明本文控制方案不仅能使游梁式抽油机异步电动机轻载运行时节能,还使其电磁转矩振荡减小。该控制方法可以推广到一般中小容量异步电动机变频调速系统。 相似文献
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Bianchi N. Bolognani S. Zigliotto M. Zordan M. 《Energy Conversion, IEEE Transaction on》2003,18(2):306-314
Interior permanent-magnet (PM) synchronous motors are extensively used in many industrial drives and the development of fault-tolerant control techniques may extend their use to applications where high reliability, also in the flux-weakening region, is a key feature. This paper proposes some innovative fault-remedial control strategies for failures occurring in the drive voltage inverter. 相似文献