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首页> 外文会议>CES/IEEE 5th International Power Electronics and Motion Control Conference (IPEMC 2006) >Research on an AC Variable-frequency Power Dynamometer Based on PWM Rectifier and Fuzzy Direct Torque Control
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Research on an AC Variable-frequency Power Dynamometer Based on PWM Rectifier and Fuzzy Direct Torque Control

机译：基于PWM整流器和模糊直接转矩控制的交流变频测功机的研究

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摘要

The traditional dynamometers consume more fuel or electric energy while working, so they not only waste energy, but also have lower dynamic performance. An AC variable-frequency power dynamometer scheme is presented based on PWM Rectifier and Fuzzy Direct Torque Control (DTC) of induction motor in this paper. The dynamometer can operate in both motoring and generating states. The bidirectional flow of the energy with unit power factor between the power grids and the dynamometer is realized by voltage-oriented control (VOC) three-phase PWM rectifier. The dynamometer absorbs the energy from the power grids in motoring state, and feeds back the energy generated by the dynamometer to the power grids in generating state. In order to improve dynamic response capability and decrease the torque ripple of the dynamometer, the fuzzy logic idea is adopted based on conventional DTC. The stator flux angle, the stator flux error, and the torque error are reasonably fuzzified into several fuzzy subsets to optimize selection of the voltage vector. The proposed scheme is implemented with a single board microcomputer that uses TMS320LF2407A DSP and intelligent power model (IPM) to validate its feasibility. Experimental results show that the dynamometer has outstanding dynamic and static performance. The application of this novel dynamometer both saves the energy source and decreases the disturbances to power grids caused by rectification.
机译：传统的测功机在工作时会消耗更多的燃料或电能，因此不仅浪费能量，而且动力性能也较低。提出了一种基于PWM整流器和异步电动机模糊直接转矩控制（DTC）的交流变频测功机方案。测力计可以在电动状态和发电状态下运行。电网和测功机之间具有单位功率因数的能量的双向流动是通过电压定向控制（VOC）三相PWM整流器实现的。测功机在行驶状态下从电网吸收能量，并将测功机产生的能量反馈到发电状态下的电网。为了提高测功机的动态响应能力，减小测功机的转矩脉动，采用了基于传统故障诊断代码的模糊逻辑思想。将定子磁通角，定子磁通误差和转矩误差合理地模糊化为几个模糊子集，以优化电压矢量的选择。所提出的方案是通过使用TMS320LF2407A DSP和智能电源模型（IPM）的单板微型计算机来实现的，以验证其可行性。实验结果表明，该测功机具有出色的动，静态性能。该新型测功机的应用既节省了能源，又减少了整流对电网的干扰。

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