| 基于预测控制的直接转矩控制系统的研究 |
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| 引用本文： | 郑丽姬,胡金高.基于预测控制的直接转矩控制系统的研究[J].福建工程学院学报,2006,4(4):391-395. |
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| 作者姓名： | 郑丽姬 胡金高 |
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| 作者单位： | 福州大学电气工程与自动化学院,福建,福州,350002 |
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| 摘 要： | 针对异步电动机直接转矩控制（DTC）系统在低速时由于开关频率不稳定而引起转矩脉动较大的缺点，提出了一种预测控制方法。该方法根据转矩和定子磁链的误差来确定应该施加的参考电压矢量，最后利用空间矢量脉宽调制（SVPWM）方法来合成该矢量，这样即保证了逆变器的开关频率恒定，从而大大降低转矩脉动。仿真结果表明，在低速下定子磁链轨迹近似为圆，转矩脉动不明显。
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| 关 键 词： | 直接转矩控制 预测控制 空间矢量脉宽调制 转矩脉动 异步电机 |
| 文章编号： | 1672-4348（2006）04-0391-05 |
| 收稿时间： | 2006-06-30 |
| 修稿时间： | 2006年6月30日 |
Research on direct torque control of induction motor based on predictive control |
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| Zheng Liji,Hu Jingao.Research on direct torque control of induction motor based on predictive control[J].Journal of Fujian University of Technology,2006,4(4):391-395. |
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| Authors: | Zheng Liji Hu Jingao |
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| Abstract: | A new predictive control strategy of direct torque control(DTC) was proposed to reduce the large torque ripple of induction motor caused by the instability of switch frequency due to conventional direct torque control at low speeds.Reference voltage space vector can be determined by calculating the errors of the flux and torque in terms of the predictive strategy.The vector is then synthesized by a SVPWM(space vector pulse width modulation) algorithm to keep a constant switch frequency.The simulation shows that the control method can lessen the torque ripple and maintain the waveform of stator flux nearly round. |
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| Keywords: | direct torque control(DTC) predictive control space vector pulse width modulation((SVPWM)) torque ripple induction motor |
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