Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157641
Zeng Liu, Jinjun Liu, Li Jin
The Three-phase four-leg inverter is very suitable to be used in the high power UPS, and the load neutral point voltage should be low to meet the requirement of the UPS. In this paper, the load neutral point voltage is modeled. Two factors influencing the load neutral point voltage are revealed, which are the switching states and the ratio of neutral inductance to phase inductance. Then, the load neutral voltage is analyzed. Sixteen switching states can be grouped into four classes, and each class is with the same load neutral point voltage. Switching states of the first and the second class come to the minimum valve of zero with the special ratio of k. Thirdly, three methods to mitigate the load neutral point voltage are proposed, and the benefit and the limitation of each method are analyzed. Finally, the proposed methods are verified by simulation and experiment.
{"title":"Modeling, analysis and mitigation of load neutral point voltage for Three-phase four-leg inverter","authors":"Zeng Liu, Jinjun Liu, Li Jin","doi":"10.1109/IPEMC.2009.5157641","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157641","url":null,"abstract":"The Three-phase four-leg inverter is very suitable to be used in the high power UPS, and the load neutral point voltage should be low to meet the requirement of the UPS. In this paper, the load neutral point voltage is modeled. Two factors influencing the load neutral point voltage are revealed, which are the switching states and the ratio of neutral inductance to phase inductance. Then, the load neutral voltage is analyzed. Sixteen switching states can be grouped into four classes, and each class is with the same load neutral point voltage. Switching states of the first and the second class come to the minimum valve of zero with the special ratio of k. Thirdly, three methods to mitigate the load neutral point voltage are proposed, and the benefit and the limitation of each method are analyzed. Finally, the proposed methods are verified by simulation and experiment.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126086486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157727
Li Lijuan, Chen Xikun
In this paper, a new type of stepping motor-drive main circuit topology has been research. The characteristic of main circuit with traditional stepping motor driver of the difference between the novel main circuit topology was research. The control strategy of the four phase mixed stepping motor was analyzed based on the topology, and given the used of digital signal processor of the stepping motor digital control system. Simulation and experimental results show that the main circuit topology can accelerate the winding current response performance of four phase mixed stepping motor, effectively improve high speed stepping motor operating characteristics.
{"title":"Study on the novel main circuit topology of stepping motor drive","authors":"Li Lijuan, Chen Xikun","doi":"10.1109/IPEMC.2009.5157727","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157727","url":null,"abstract":"In this paper, a new type of stepping motor-drive main circuit topology has been research. The characteristic of main circuit with traditional stepping motor driver of the difference between the novel main circuit topology was research. The control strategy of the four phase mixed stepping motor was analyzed based on the topology, and given the used of digital signal processor of the stepping motor digital control system. Simulation and experimental results show that the main circuit topology can accelerate the winding current response performance of four phase mixed stepping motor, effectively improve high speed stepping motor operating characteristics.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114139806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157725
Guo Xinhua, W. Xuhui, Longya Xu, Zhao Feng, Liu Jun
A dual mechanical port electric machine (DMPM) is used as an electrical variable transmission (EVT) in hybrid electric vehicle (HEV), as presented in [1]. In this paper, the EVT system simulation model including the models of DMPM, internal combustion engine (ICE) and controller, is built. Base on this model, the dynamic process of the system such as the ICE's startup and stop, are analyzed. Simulation results show that there is an impact torque acting on the outer motor of DMPM at the moment of ICE's startup or stop, which should be avoided by the mechanical decoupling control and control method of ICE's startup. The experiment test rig is built, the method of mechanical decoupling control and the control method of ICE's startup is implemented during the experiment. The experiment results validate the theoretical analysis and simulation results.
{"title":"Simulation and experiment analysis of dynamic process for an EVT based on dual mechanical port electric machine","authors":"Guo Xinhua, W. Xuhui, Longya Xu, Zhao Feng, Liu Jun","doi":"10.1109/IPEMC.2009.5157725","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157725","url":null,"abstract":"A dual mechanical port electric machine (DMPM) is used as an electrical variable transmission (EVT) in hybrid electric vehicle (HEV), as presented in [1]. In this paper, the EVT system simulation model including the models of DMPM, internal combustion engine (ICE) and controller, is built. Base on this model, the dynamic process of the system such as the ICE's startup and stop, are analyzed. Simulation results show that there is an impact torque acting on the outer motor of DMPM at the moment of ICE's startup or stop, which should be avoided by the mechanical decoupling control and control method of ICE's startup. The experiment test rig is built, the method of mechanical decoupling control and the control method of ICE's startup is implemented during the experiment. The experiment results validate the theoretical analysis and simulation results.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121800347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157630
Qin Liang, Kaipei Liu, Hui Zhang, Zhao Xiaoming
As the work frequency is very low, the Optimal Unsymmetrical PWM Method is suitable to be applied in high-power situation requiring control of fundamental and harmonics simultaneously, which will reduce the switch loss and the EMI greatly. Because of the low work frequency, the optimal unsymmetrical PWM method requires optimizing each independent switch angle in order to achieve good control effect, and it needs to solve the nonlinear equations on-line inevitably to obtain the switch angle. A new algorithm by combining the predominance of the Newton and homotopy algorithms is proposed, which can effectively realize switch angle on-line computation with relative high convergence rate. At last, this paper validated the real-time performance and the effectiveness of the switch angle algorithms on the experimental platform with the control core of TMS320F2812.
{"title":"Real-time algorithm research and realization of Optimal Unsymmetrical PWM method","authors":"Qin Liang, Kaipei Liu, Hui Zhang, Zhao Xiaoming","doi":"10.1109/IPEMC.2009.5157630","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157630","url":null,"abstract":"As the work frequency is very low, the Optimal Unsymmetrical PWM Method is suitable to be applied in high-power situation requiring control of fundamental and harmonics simultaneously, which will reduce the switch loss and the EMI greatly. Because of the low work frequency, the optimal unsymmetrical PWM method requires optimizing each independent switch angle in order to achieve good control effect, and it needs to solve the nonlinear equations on-line inevitably to obtain the switch angle. A new algorithm by combining the predominance of the Newton and homotopy algorithms is proposed, which can effectively realize switch angle on-line computation with relative high convergence rate. At last, this paper validated the real-time performance and the effectiveness of the switch angle algorithms on the experimental platform with the control core of TMS320F2812.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121473771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157585
D. Kwak, Seung-Ho Lee, Do-Young Jung
In this paper, we study on a new buck-boost dc/dc converter of high efficiency by soft switching technique. The switching devices in the proposed converter are operated by soft switching with a new partial resonant circuit. The partial resonant circuit is designed to replacement of an energy storage inductor and a snubber circuit used in a conventional buck-boost converter, and then the configuration of the proposed converter is simplified. The switching control technique of the converter is also simplified for the switches to drive in a constant switching frequency. The results are that the switching power loss is very low and system efficiency is high. In addition, the output voltage of the converter is regulated by PWM control technique, and the discontinuous current flowing into the resonant inductor of the converter makes to simplify control method and control components. In comparison with the conventional buck-boost dc/dc converter, some simulation results on computer and experimental results are confirmed the validity of analytical results of the proposed converter.
{"title":"A new buck-boost dc/dc converter of high efficiency by soft switching technique","authors":"D. Kwak, Seung-Ho Lee, Do-Young Jung","doi":"10.1109/IPEMC.2009.5157585","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157585","url":null,"abstract":"In this paper, we study on a new buck-boost dc/dc converter of high efficiency by soft switching technique. The switching devices in the proposed converter are operated by soft switching with a new partial resonant circuit. The partial resonant circuit is designed to replacement of an energy storage inductor and a snubber circuit used in a conventional buck-boost converter, and then the configuration of the proposed converter is simplified. The switching control technique of the converter is also simplified for the switches to drive in a constant switching frequency. The results are that the switching power loss is very low and system efficiency is high. In addition, the output voltage of the converter is regulated by PWM control technique, and the discontinuous current flowing into the resonant inductor of the converter makes to simplify control method and control components. In comparison with the conventional buck-boost dc/dc converter, some simulation results on computer and experimental results are confirmed the validity of analytical results of the proposed converter.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116557885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157845
L. Ding, Fu Peng
The EAST superconducting tokamak is an advanced steady state experimental device being built at ASIPP in China from 2000 to around 2006. The paper gives a description for the power supply (PS) of poloidal field (PF) in EAST. Design and test results for the thyristor switch network are emphasized with transient analyses.
{"title":"Design and test results for the 15kA thyristor switch network of EAST","authors":"L. Ding, Fu Peng","doi":"10.1109/IPEMC.2009.5157845","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157845","url":null,"abstract":"The EAST superconducting tokamak is an advanced steady state experimental device being built at ASIPP in China from 2000 to around 2006. The paper gives a description for the power supply (PS) of poloidal field (PF) in EAST. Design and test results for the thyristor switch network are emphasized with transient analyses.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"43 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114008993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157686
X. She, Y. She, Cheng-zhi Wang, Jian Tang, Fen Li, Y. Zou
By defining power electronic load cell (PEL cell) and adopting different control strategies, the application of power electronic load for both AC and DC source is presented in this paper. A unified power electronic load is proposed which is composed of three basic PEL cells. Improved repetitive control is proposed to improve the dynamic performance of the system. Theoretical analysis and simulation results verify the validity of this unified power electronic load.
{"title":"Unified power electronic load for burn-in test","authors":"X. She, Y. She, Cheng-zhi Wang, Jian Tang, Fen Li, Y. Zou","doi":"10.1109/IPEMC.2009.5157686","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157686","url":null,"abstract":"By defining power electronic load cell (PEL cell) and adopting different control strategies, the application of power electronic load for both AC and DC source is presented in this paper. A unified power electronic load is proposed which is composed of three basic PEL cells. Improved repetitive control is proposed to improve the dynamic performance of the system. Theoretical analysis and simulation results verify the validity of this unified power electronic load.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131181343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157700
Bin Wang, Yue Wang, Zhaoan Wang
A modified speed sensorless direct torque control (DTC) scheme for surface permanent magnet synchronous machine (SPM) is investigated in this paper, which features in very low flux and torque ripple and almost fixed switching frequency. Instead of the switching table and hysteresis controllers in the basic DTC, a reference flux vector calculator (RFVC) is used to determine the reference stator flux linkage vector. The reference flux vector is produced according to the amplitude of the reference and estimated stator flux linkages, the position of the estimated stator flux linkage, the amplitude of the reference and estimated torques and the estimated rotor speed. Then the voltage vectors applied on the machine is calculated to compensate the flux and torque errors exactly, so the flux and torque are controlled in the deadbeat fashion. A speed estimation method is also introduced in this paper, in which the rotor flux linkage is calculated from the stator flux linkage and the stator current. Then the rotor speed is calculated from the rotor flux linkage. Simulation results show that the flux and torque ripples are greatly reduced when compared with those of the basic DTC. With the new scheme, the quick dynamic torque response of the basic DTC is still retained. Fixed switching frequency at different operating conditions becomes possible by means of space vector modulation.
{"title":"A modified direct torque control of surface permanent magnet synchronous motor drives without a speed sensor","authors":"Bin Wang, Yue Wang, Zhaoan Wang","doi":"10.1109/IPEMC.2009.5157700","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157700","url":null,"abstract":"A modified speed sensorless direct torque control (DTC) scheme for surface permanent magnet synchronous machine (SPM) is investigated in this paper, which features in very low flux and torque ripple and almost fixed switching frequency. Instead of the switching table and hysteresis controllers in the basic DTC, a reference flux vector calculator (RFVC) is used to determine the reference stator flux linkage vector. The reference flux vector is produced according to the amplitude of the reference and estimated stator flux linkages, the position of the estimated stator flux linkage, the amplitude of the reference and estimated torques and the estimated rotor speed. Then the voltage vectors applied on the machine is calculated to compensate the flux and torque errors exactly, so the flux and torque are controlled in the deadbeat fashion. A speed estimation method is also introduced in this paper, in which the rotor flux linkage is calculated from the stator flux linkage and the stator current. Then the rotor speed is calculated from the rotor flux linkage. Simulation results show that the flux and torque ripples are greatly reduced when compared with those of the basic DTC. With the new scheme, the quick dynamic torque response of the basic DTC is still retained. Fixed switching frequency at different operating conditions becomes possible by means of space vector modulation.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131446555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157590
Xiaohu Liu, Xinchun Lin, Feidong Xu, Yong Kang
The traditional procedure for analyzing switching converters is based on linearized smooth averaged (small-signal) models and the performance is limited because of the inaccurate model. In this paper, the feedback linearization techniques are proposed to design stabilizing robust controllers for PWM DC-DC converters. Simulation and experimental results validate the analytical predictions.
{"title":"Research on Boost converter based on nonlinear control strategy","authors":"Xiaohu Liu, Xinchun Lin, Feidong Xu, Yong Kang","doi":"10.1109/IPEMC.2009.5157590","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157590","url":null,"abstract":"The traditional procedure for analyzing switching converters is based on linearized smooth averaged (small-signal) models and the performance is limited because of the inaccurate model. In this paper, the feedback linearization techniques are proposed to design stabilizing robust controllers for PWM DC-DC converters. Simulation and experimental results validate the analytical predictions.","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131492384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-05-17DOI: 10.1109/IPEMC.2009.5157690
Li Lin, Surong Huang, Wenhan Hong
Precision linearization control of IPMSM system is realized with nonlinear state feedback and coordinates transformation. The IPMSM is decomposed into two linear subsystems, d-axis flux subsystem and rotation speed subsystem. Simulation results show that IPMSM control system based on the design of input and output decoupling and linearization achieves high dynamic performance than the ordinary field oriented control (FOC).
{"title":"Precision linearization control of inner permanent magnet synchronous motor for electrical vehicle drive system","authors":"Li Lin, Surong Huang, Wenhan Hong","doi":"10.1109/IPEMC.2009.5157690","DOIUrl":"https://doi.org/10.1109/IPEMC.2009.5157690","url":null,"abstract":"Precision linearization control of IPMSM system is realized with nonlinear state feedback and coordinates transformation. The IPMSM is decomposed into two linear subsystems, d-axis flux subsystem and rotation speed subsystem. Simulation results show that IPMSM control system based on the design of input and output decoupling and linearization achieves high dynamic performance than the ordinary field oriented control (FOC).","PeriodicalId":375971,"journal":{"name":"2009 IEEE 6th International Power Electronics and Motion Control Conference","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116526606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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