{"title":"An Improved Model Predictive Control Method for Induction Motor Drives Fed by Indirect Matrix Converter","authors":"Yang Mei, Liang Wang, Weichao Huang","doi":"10.1109/PEAC.2018.8590603","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590603","url":null,"abstract":"In the model predictive control (MPC) method for the indirect matrix converter (IMC), due to the limited switching state and the fixed control frequency, the output voltage of converter is limited. As a result, if the valid output voltages and the reference value are mismatched, there will be rich harmonics in the output and input currents. In order to solve this problem, an improved model predictive control method is proposed for the induction motor drives fed by an indirect matrix converter, in which the grid current and the motor flux vector are used as the control objectives. A zero vector switching state of the inverter circuit is inserted in each sampling period, and the optimal duty cycle and the corresponding switching states are obtained by using the monotonicity of the cost function with the time constraint of the switching state. The simulation and experimental results show that good grid current quality and dynamic/steady state performances for the induction motor are achieved by using the proposed method, and the zero current commutation for bi-directional switches is realized. Compared with the conventional MPC, the harmonics of the input and output currents for IMC are both reduced, especially under the middle and low speed conditions.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114389510","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}
Hongyan He, Dianshun Lv, Lu Wen, Wei Lu, H. Geng, Jun'e Gao
{"title":"Analysis and Suppression Strategies of Sub-synchronous Resonance on DFIG","authors":"Hongyan He, Dianshun Lv, Lu Wen, Wei Lu, H. Geng, Jun'e Gao","doi":"10.1109/PEAC.2018.8590401","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590401","url":null,"abstract":"Sub-synchronous resonance (SSR) may be caused by the interaction between wind turbine series compensation transmission system and control of doubly-fed induction generator (DFIG), which is called sub-synchronous control interaction (SSCI). To analyze this phenomenon and provide corresponding suppression measures, the relation between SSR circuit and control of DFIG is explored deeply, and two strategies are proposed, including the detailed design methods. Furthermore, the paper analyzes the restrained effects on SSR by using additional damping control with different filters. Eventually, the discussed strategies have been verified through Matlab/Simulink, which provides a theoretical support to solve the SSR caused by SSCI in the wind farm.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114513502","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}
{"title":"Electrolytic Capacitor-Less PMSM Control System With a Neural Network-Based Bus Voltage Fluctuation Suppression Strategy","authors":"Liyu Zhang, Qianlong Tang, Wen Yang, C. Shen","doi":"10.1109/PEAC.2018.8590679","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590679","url":null,"abstract":"Electrolytic capacitor-less converters have the advantages of low cost, long life, high power density and high power factor. But the bus voltage is bound to fluctuate significantly with the greatly reduced electrolytic capacitor, causing damage to capacitor, switches, and motor. It’s necessary to suppress the fluctuation of bus voltage for a better performance. This paper presents a neural network-based bus voltage fluctuation suppression of electrolytic capacitor-less PMSM control system. The neural network is trained with the current speed status and margin of voltage to generate a dynamic reference speed that can reduce the power fluctuation on bus capacitor. It is verified that the bus voltage can be effectively suppressed compared to the non-optimized electrolytic capacitor-less model with only 4% of large electrolytic capacitor.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122122664","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}
{"title":"The Current Loop Stability Investigation under Zero Ripple Current Mode Applied for the Interleaved Active Clamp Forward Converter","authors":"Richard Yang","doi":"10.1109/PEAC.2018.8590444","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590444","url":null,"abstract":"In this paper, the loop instability issue regarding the inner current loop used in the interleaved parallel-series active clamp forward (ACF) has been addressed, which occurs mostly under the condition of Zero output ripple current when D approaches 0.5. To have a full investigation, the small signal model regarding the inner current Loop is proposed for the analysis, based on which the criterion and the design tips targeting to achieve the loop stability have been proposed and elaborated. Finally, the measurement based on LM5034 related application has been conducted for the verification. It is shown that the proposed solution agrees well with measurement.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122143671","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}
{"title":"Investigation of Common-Mode Current Elimination in Four-Wire Inverter-Fed Motor","authors":"Zhao Zhao, B. Horn, R. Leidhold","doi":"10.1109/PEAC.2018.8590271","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590271","url":null,"abstract":"Different concepts for mitigating common-mode (CM) current across the electric-drive system of an electric vehicle (EV) are evaluated in this paper. A traditional common-mode filter (CMMF) is designed and proved to be effective to reduce the leakage current in the three-wire topology. Even more reduction can be obtained in the four-wire topology, whether CMMF is installed or not. This is mainly due to the significantly decreased du/dt of neutral voltage in the four-wire topology, while the elimination caused by the CMMF is comparatively smaller. Besides, inserting CMMF to the four-wire topology can further reduce the CM current in some frequencies, at the price of some increase in other frequencies. Therefore, it is concluded that stronger elimination of CM current as well as avoiding bulky CMMF can be both realized through the utilization of four-wire topology. Even less CM current in the specific frequency range may be expected in this topology through optimized design of CMMF. These findings provide hints for mitigating CM current in an economic way and are validated by experiments on a practical electric-drive system.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129941602","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}
Yingjie Jia, Yaoqiang Duan, F. Xiao, Yifei Luo, Binli Liu, Hongfei Deng
{"title":"Mechanism Analysis of Bond Wire Degradation Leading to the Increase of IGBT Collector-Emitter Voltage","authors":"Yingjie Jia, Yaoqiang Duan, F. Xiao, Yifei Luo, Binli Liu, Hongfei Deng","doi":"10.1109/PEAC.2018.8590628","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590628","url":null,"abstract":"This paper proposed an electro-thermal coupling finite element method for the mechanism analysis of the IGBT collector-emitter voltage increase due to the bond wire degradation. Experimental results show that bond wire degradation may lead to the increase of bond wire contact resistance, which is generally seen as the main reason for the increase of IGBT collector-emitter voltage. However, due to the forward voltage drop in the IGBT chip contributes to the most part of the collector-emitter voltage, the electro-thermal simulation results find that the increased chip temperature is the primary reason for the increase of collector-emitter voltage after the degradation of the bond wires. Finally, the mechanism analysis method presented in this paper is verified by accelerated experiments with Starpower GD50HFL120C1S IGBT modules.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128777875","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}
Yugang Yang, Heng Li, Huaijin Miao, Weiyi Huang, Xiaoyu Sun
{"title":"Design of “EIE” Shape Coupling Inductors and Its Application in Interleaved LLC Resonant Converter","authors":"Yugang Yang, Heng Li, Huaijin Miao, Weiyi Huang, Xiaoyu Sun","doi":"10.1109/PEAC.2018.8590626","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590626","url":null,"abstract":"In order to solve the problems of large number of magnetic components and unequal current in interleaved LLC resonant converter, inverse coupling of two-phase resonant inductors is proposed. On the basis of traditional EE” and EI” shape coupling inductors, the “EIE” shape coupling inductors are proposed, which solve the problems of traditional coupling inductors, such as air gap is too concentrated, distribution of magnetic pressure is not uniform, and coupling coefficient is low. In order to verify the current sharing scheme, separate inductors and coupling inductor are made respectively. The experimental prototype of an interleaved LLC resonant converter with 48V input and 1kW/400V output is built. The comparison experiment shows that the current sharing is basically realized when the coupling coefficient is selected at certain value.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128662761","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}
Genji Pei, Jiaxi Liu, Liyi Li, Pengcheng Du, Le Pei, Yusheng Hu
{"title":"MRAS Based Online Parameter Identification for PMSM Considering VSI Nonlinearity","authors":"Genji Pei, Jiaxi Liu, Liyi Li, Pengcheng Du, Le Pei, Yusheng Hu","doi":"10.1109/PEAC.2018.8590394","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590394","url":null,"abstract":"In order to improve the identification accuracy and tracking performance of parameter estimation, two improvements on model reference adaptive system (MRAS) based on-line estimation method with VSI nonlinearity compensation are proposed for permanent magnet synchronous machines (PMSMs) in this paper. Firstly, the stator resistance and inductance identification equations are derived separately under the stationary two phase reference frame $(alpha beta -$ axis). The stability of the system is analyzed with the Lyapunov stability theorem. Secondly, exponent form saturation functions are proposed to accelerate the estimated tracking speed and suppress the steady state fluctuation. Finally, the paper analyses the distorted voltages caused by the voltage source inverter (VSI) nonlinearity and derives the equation of their influence on the estimation, of which the accuracy is proved with a compensation method. Several experiments were implemented on a PMSM with small electrical parameters. The result shows the validity of the proposed parameter identification method.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128937788","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}
Xiaogang Huang, Tianhao Tang, Meilei Lv, Yizhen Zhu, Qihan Bao
{"title":"Research on the Energy Storage Device of Super Capacitor for Heave Compensation System","authors":"Xiaogang Huang, Tianhao Tang, Meilei Lv, Yizhen Zhu, Qihan Bao","doi":"10.1109/PEAC.2018.8590294","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590294","url":null,"abstract":"A study for heave compensation system of super capacitor energy storage devices, which uses the bidirectional DC/DC converter for connecting DC bus and super capacitor, and aims at solving problems of heave compensation feedback electricity use. The three-phase half bridge of isolated bidirectional DC/DC converter as the transmission circuit with the change of the DC bus voltage as reference is selected, the double closed loop control strategy of bidirectional DC/DC converter is designed, for achieving stability of bus bar voltage. As the DC bus voltage rises, super capacitor is charged, as the DC bus voltage reduces, the super capacitor is discharged. Experiments verify the effectiveness of the control strategy for the proposed bidirectional DC/DC converter based on DSP of super capacitor energy storage device.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129261551","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}
{"title":"Operation of Combined HF and LF Boost Stage Inductors in PFC Design","authors":"K. K. Siu, C. N. Ho","doi":"10.1109/PEAC.2018.8590548","DOIUrl":"https://doi.org/10.1109/PEAC.2018.8590548","url":null,"abstract":"This paper presents an alternative solution on boost stage inductor design. The presented alternative inductor solution is to use an addition LC circuit to parallel with an original converter inductor so that it results an effective converter inductor. High frequency and low frequency current components in a traditional boost stage inductor can be separated out individually. The inductor in LC circuit guides the high frequency current components and the original inductor only needs to handle the line frequency current component. Therefore, each inductor can be more specifically focused on their target frequency component to be the optimization. Thus, a more effective converter solution is resulted under the combined inductor solution. In this paper, a detail design criteria is presented and together with a comparison with different magnetic components is provided. The performance of the presented solution is experimentally verified in a 300W test platform. Both steady state and transient state experimental results also show with a good agreement with the theoretical findings.","PeriodicalId":446770,"journal":{"name":"2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129655277","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}