• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >An improved direct torque controlled interior permanent magnet synchronous machine drive without a speed sensor
【2h】

An improved direct torque controlled interior permanent magnet synchronous machine drive without a speed sensor

机译：改进的直接转矩控制的内部永磁同步电机驱动器，不带速度传感器

页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Some essential and important improvements of the direct torque controlled interiorpermanent magnet (IPM) synchronous machine drive are presented in this thesis. Thesestudies, including analysis, modeling and experimental implementations confirm thepossibility of a high performance direct torque controlled IPM synchronous motor drivewithout any continuous rotor position and speed sensor and without any current controller.The direct torque control technique, the comparison between DTC and FOC, andcompensation methods for the problems/limitations associated with DTC have beeninvestigated in this thesis. A number of important problems that affect the accuracy of theestimated machine flux linkage on which the DTC technique is built are thoroughlyexamined. Estimation of stator resistance variation, analysis and compensation of thenon-linear effects of the inverter such as forward voltage drop and dead-time, speedsensorless control, and torque and flux ripple minimization for a direct torque controlledIPM motor drive are of major concern in this thesis. A Proportional-Integral statorresistance estimator based on stator current has been investigated for the compensation ofany variation in stator resistance. It is shown that the estimator can track the variation ofthe stator resistance adequately. The scheme utilizes the error between the actual currentand the reference current and requires no position signal. Modeling and experimentalresults will be shown.The non-linear effects of the inverter affect flux estimation greatly, especially at lowspeed. The effects such as forward voltage drop, dead-time and switching delay isanalyzed, they degrade the system performance by introducing error between theestimated values and the actual values. The effects of the forward voltage drop and deadtimecan be compensated by using a look-up table. The performance improvement of thedrive has been shown in experiments. A speed estimation scheme based on stator fluxlinkage estimation is adopted and investigated experimentally. Furthermore, thepossibility of fielding-weakening operation of the speed sensorless control is alsoinvestigated by modeling.The torque and flux ripples are significant problems of the DTC, and are mentionedwidely. In order to solve this problem, the changes of torque and flux linkage over asampling period are derived. Based on the analysis, a modified DTC is proposed toovercome these significant problems. Modeling and experimental results confirm theeffectiveness of the proposed scheme. The field weakening control and speed sensorlesscontrol scheme is also combined with the proposed scheme. The experimental resultsshow the new DTC scheme can achieve wider range operation and speed sensorlesscontrol successfully. The torque and flux ripples are reduced greatly under the newscheme in all experimental results.These abovementioned studies have clearly established that the DTC technique for theIPM machine is now much closer to being a viable and cost-effective candidate for asensorless PM synchronous motor drive.
机译：本文提出了直接转矩控制的内部永磁同步电机驱动器的一些重要和重要的改进。这些研究，包括分析，建模和实验实现，证实了在没有任何连续转子位置和速度传感器且没有任何电流控制器的情况下，高性能直接转矩控制IPM同步电动机驱动器的可能性。直接转矩控制技术，DTC和FOC之间的比较以及补偿方法本文针对DTC相关的问题/局限性进行了研究。彻底检查了许多重要的问题，这些问题影响了建立DTC技术的估计机器磁链的准确性。本文主要关注定子电阻变化的估计，逆变器的非线性影响的分析和补偿，例如正向压降和空载时间，无速度传感器控制以及直接转矩控制的IPM电机驱动器的转矩和磁通波动最小化。 。研究了基于定子电流的比例积分定子电阻估计器，以补偿定子电阻的任何变化。结果表明，估计器可以充分跟踪定子电阻的变化。该方案利用了实际电流和参考电流之间的误差，并且不需要位置信号。将会显示出建模和实验结果。逆变器的非线性效应极大地影响了磁通估计，特别是在低速情况下。分析了诸如正向压降，空载时间和开关延迟之类的影响，它们通过在估计值和实际值之间引入误差而降低了系统性能。正向电压降和空载时间的影响可以通过使用查找表来补偿。实验表明，该驱动器的性能有所提高。采用了基于定子磁链估计的速度估计方案，并进行了实验研究。此外，还通过建模研究了无速度传感器控制的弱磁场励磁操作的可能性。为了解决这个问题，推导了在采样周期内转矩和磁链的变化。在分析的基础上，提出了一种改进的故障诊断代码以克服这些重大问题。建模和实验结果证实了该方案的有效性。弱磁控制和无速度传感器控制方案也与提出的方案相结合。实验结果表明，新的DTC方案可以成功实现更宽范围的运行和无传感器速度控制。在所有实验结果中，在新的方案下，转矩和磁通的波动都大大降低了。上述研究已经清楚地证明，用于IPM机器的DTC技术现在更接近于成为无传感器PM同步电动机驱动器的可行且具有成本效益的候选者。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号