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torque prediction
相关语句
  转矩预测
     Direct Torque Control Technology Based on Torque Prediction
     基于转矩预测的直接转矩控制技术
短句来源
     Research on direct torque control of induction machine based on torque prediction
     基于转矩预测的异步电机直接转矩控制研究
短句来源
     To reduce torque ripple, a DTC based on torque prediction is proposed for induction motors fed by three-level NPC inverter.
     为减小转矩脉动,提出了一种基于转矩预测的三电平直接转矩控制策略。
短句来源
     It introduces a control strategy based on Torque Prediction. Thescheme given in this paper partially corrects the defect which leads to the large vibrationof the static electromagnetic torque.
     提出了一种基于转矩预测的控制策略,部分弥补了一般直接转矩控制技术中稳态电磁转矩波动较大的不足。
短句来源
     The control strategy introduced the idea of torque prediction to reduce the torque ripples. The torque of the next control period was predicted by the derived equation, and the operational time of the voltage space-vector in the next control period was determined based on the predicted torque.
     引入转矩预测的思想,预测下一个控制周期所需要的转矩,根据其转矩分配下一个控制周期的电压空间矢量作用时间,来减小转矩脉动.
短句来源
  扭矩预测
     During well drilling, such advanced drilling technologies as top drive, MWD monitoring + steerable drill well trajectory control, water base drilling fluid for extended reach well, high speed linear shale shaker, non-rotation drill pipe protector, friction and torque prediction and analysis software, casing roller centralizer, and full hole logging + drill pipe conveyed logging were used.
     该井应用了顶部驱动、MWD监测+导向钻具井眼轨迹控制、大位移井水基钻井液、高速线性振动筛、非旋转钻杆保护器、摩阻扭矩预测分析、套管滚轮扶正器和大满贯测井 +钻杆输送测井等技术。
短句来源
     Drag/torque prediction is a key technique of drilling an Extended Reach Well successfully.
     井下摩阻/扭矩预测是大位移井钻井成功的关键技术之一。
短句来源
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  torque prediction
In particular, an analysis of torque prediction is discussed along with the presentation of kinematic and dynamic relationships.
      


This paper discusses the defects of conventional DTC technology and seeks for thecause of those detects. It introduces a control strategy based on Torque Prediction. Thescheme given in this paper partially corrects the defect which leads to the large vibrationof the static electromagnetic torque. The results through the simulation experimentsprove the validity of the scheme.

本文讨论了一般直接转矩控制技术存在的缺陷及其原因。提出了一种基于转矩预测的控制策略,部分弥补了一般直接转矩控制技术中稳态电磁转矩波动较大的不足。仿真实验结果证实了本方案正确可行。

Well BPX-3x1 is the first large extended reach well located onshore of Jidong Oilfield, with a horizontal displacement of 3049.79m, a TMD of 4189m, a TVD of 2452.16m, and a Max. hole inclination of 67.18°, its displacement to TVD rate is 1.24∶1, and the drilling cycle lasted out 59.98 days. Many advanced technologies were applied in drilling this well, e.g., during well designing, Three Pressure Profile Prediction Technology was applied for wellbore stability study, to provide scientific evidences for designing...

Well BPX-3x1 is the first large extended reach well located onshore of Jidong Oilfield, with a horizontal displacement of 3049.79m, a TMD of 4189m, a TVD of 2452.16m, and a Max. hole inclination of 67.18°, its displacement to TVD rate is 1.24∶1, and the drilling cycle lasted out 59.98 days. Many advanced technologies were applied in drilling this well, e.g., during well designing, Three Pressure Profile Prediction Technology was applied for wellbore stability study, to provide scientific evidences for designing the suitable casing program and drilling fluid density, by analyzing the friction and torque, some useful data were provided for well configuration selection, equipment selection and planning the friction and torque reduction measures. During well drilling, such advanced drilling technologies as top drive, MWD monitoring + steerable drill well trajectory control, water base drilling fluid for extended reach well, high speed linear shale shaker, non-rotation drill pipe protector, friction and torque prediction and analysis software, casing roller centralizer, and full hole logging + drill pipe conveyed logging were used. The drilling design and field operation, as well as the experience and defects were presented in detail.

北堡西 3x1井是首次部署在冀东滩海水平位移超过 30 0 0m的大位移井 ,完钻井深 41 89m ,完钻垂深2 4 52 .1 6m ,水平位移 30 4 9.79m ,最大井斜角 67.1 8° ,位移垂深比 1 .2 4∶1 ,钻井周期 59.98d。该井应用 3压力剖面预测技术开展了井壁稳定技术的研究 ,为井身结构的设计和合理钻井液密度的设计提供了科学依据 ;通过摩阻、扭矩的分析 ,为井身剖面的选择、设备的选型和减摩减扭措施制定等提供了理论指导。该井应用了顶部驱动、MWD监测+导向钻具井眼轨迹控制、大位移井水基钻井液、高速线性振动筛、非旋转钻杆保护器、摩阻扭矩预测分析、套管滚轮扶正器和大满贯测井 +钻杆输送测井等技术。系统地介绍了该井的钻井设计和现场施工技术、取得的经验和存在的问题 ,对今后利用大位移井钻井技术勘探开发滩海油田具有一定的借鉴意义

To reduce the large torque ripple of induction machine subjected to conventional direct torque control (DTC) at low speeds, a new control strategy of DTC was proposed. On the basis of conventional DTC, a new torque differential equation was deduced and the reasons for torque ripple were analyzed. The control strategy introduced the idea of torque prediction to reduce the torque ripples. The torque of the next control period was predicted by the derived equation, and the operational time of...

To reduce the large torque ripple of induction machine subjected to conventional direct torque control (DTC) at low speeds, a new control strategy of DTC was proposed. On the basis of conventional DTC, a new torque differential equation was deduced and the reasons for torque ripple were analyzed. The control strategy introduced the idea of torque prediction to reduce the torque ripples. The torque of the next control period was predicted by the derived equation, and the operational time of the voltage space-vector in the next control period was determined based on the predicted torque. Experimental results show that the proposed strategy can rapidly converge on the set torque value and decrease the torque ripple effectively, and have the same dynamic performance as the conventional DTC. The torque ripples decrease a bout 50% and don't adversely affect the control performance of the stator flux at 200 r/min. The proposed strategy is easy to implement with difitalized methods.

针对传统的异步电动机直接转矩控制在低速时存在转矩脉动比较大的问题,提出了一种新的减小转矩脉动的直接转矩控制方法,在传统异步电机直接转矩控制的基础上推导出转矩微分方程,分析了转矩脉动的原因.引入转矩预测的思想,预测下一个控制周期所需要的转矩,根据其转矩分配下一个控制周期的电压空间矢量作用时间,来减小转矩脉动.实验结果表明,该方法可使转矩快速地收敛于给定值,具有传统直接转矩控制的优良动态性能,能够有效地减小转矩脉动,在200 r/min时转矩脉动减小为传统方法的50%,并没有改变定子磁链的控制性能,该控制方法易于用数字化的方法实现.

 
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