通讯机构：
[Shan Chang-hong] U;Univ S China, Coll Elect & Elect Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
2009 Ninth International Conference on Hybrid Intelligent Systems(第九届混合智能系统国际会议 HIS 2009)
会议时间：
2009-08-12
会议地点：
沈阳
会议论文集名称：
2009 Ninth International Conference on Hybrid Intelligent Systems(第九届混合智能系统国际会议 HIS 2009)论文集
关键词：
All Digital Phase-Locked Loop (all DPLL);Wideband Frequency Tracking;Filter;VHDL;FPGA
摘要：
Based on synthesizing most sorts of phase/frequency locking mechanisims respectively shown in different conventional all digital phase-locked loop (all DPLL) systems, a novel all DPLL, which is with higher performances on wideband frequency tracking and also possesses a balance mechanisim for improving system performance on noise reduction as well as shortening time for arriving at a synchronous state, is proposed. The system has a parameters adaptation enginery, which ensures the synchronization of the phase/frequency of the output signal with that of input when a wide range of variance in phase/frequency of input signal occurs. The system is designed by using Very-High-Speed Integrated Circuit Hardware Description Language (VHDL) and implemented on a Field Programmable Gate Array (FPGA) chip. And the simulation and experimental results show that the system possesses good robustness property, for it will return to its stable state within 4 clock cycles if input signal gives a frequency jump from 400 KHz to 160 KHz. Besides, it also takes on excellent performance on noise reduction. In a word, the system is characteristic of its simple circuit structure, excellent adaptation and robustness properties, and it is prone to system integration and thus can be packed as an IP core for SoC applications.
作者机构：
[肖金凤; 周文振] School of Electrical Engineering, University of South China, Hengyang 421001, China;[喻寿益; 高金生] Institute of Information Science and Engineering, Central South University, Changsha 410083, China;[盛义发] School of Electrical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Institute of Information Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
[Sheng, Y.-F.] S;School of Electrical Engineering, University of South China, China
摘要：
The chaotic phenomena of a permanent magnet synchronous motor (PMSM) under certain circumstances were studied based on the error analysis of the stator flux observer output by parameter change of the permanent magnet synchronous motor, PMSM model with chaotic features was built, and the chaotic curves were gained based on PMSM mathematic model. A dual fuzzy controller was designed for the direct torque control (DTC) system of the PMSM. The simulation results prove that control effect on the chaotic phenomenon of the PMSM-DTC system by the dual fuzzy control is good, and the dynamic and static performances of the PMSM-DTC system will be improved. Also the ripple of torque and flux can be reduced and the response speed can be improved.
