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Zhu Jian-ling - One of the best experts on this subject based on the ideXlab platform.
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Simulation Research on Voltage Transfer Ratio for Ac-Ac Matrix Converters
Computer Simulation, 2006Co-Authors: Zhu Jian-lingAbstract:A new kind of modulation strategy was put forward for the lower voltage transfer ratio of Matrix converter. By means of the basic thought of indirect converting method for Matrix converter, in virtual process of rectifying, the spAce vector modulation was adopted for input current; while in virtual process of inverting, the spAce vector over-modulation mode I was used for output voltage. Then the middle DC link was eliminated and the control strategy for Ac-Ac Matrix converter was gotten. A careful analysis was mainly given to the output voltage spAce vector over-modulation. Further, a concrete control algorithm and the expression between voltage transfer ratio and modulation index were given, etc. The voltage transfer ratio of Matrix converter can be raised to 0.91 by mathematical calculation. Finally, the model was set up in MATLAB language. Simulation experiments demonstrate that the new modulation strategy is feasible.
Zhu Jian-lin - One of the best experts on this subject based on the ideXlab platform.
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Novel Modulation Modes of SVM for Ac-Ac Matrix Converter
Computer Simulation, 2009Co-Authors: Zhu Jian-linAbstract:People often research a modulation mode of SVM for Ac-Ac Matrix converter, ie, modulation Mode 5 in this paper.Actually, there are other different modulation modes to be worth researching.4 novel modulation modes were put forward for Ac-Ac Matrix converter for the first time expanding modulation modes of SVM for it.First, SVM for Ac-Ac Matrix converter was described.Then 5 modulation modes of SVM for it were discussed carefully.Third, the simulation model was set up for eAch modulation mode using S-function's flexibility.Finally, some important conclusions were obtained by analysis of the simulation waveforms.The results have verified all modulation modes are feasible, including 4 modulation modes put forward for the first time.Two of the four are obviously prior to mode 5which is often studied for Matrix converter;the other two of the four are also prior to mode 5 from different aspects.So, four modulation modes put forward have broken off the traditional scope of modulation modes, and optimized the input and output properties of Matrix converter.They have laid strong basis for its further researches and approAching to applications.
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ThreeModulation Modes of SVM forAc-Ac Matrix Converter
2008Co-Authors: Guo Yougui, Zhu Jian-linAbstract:People usually research modulation mode3 of SVM forMatrix converter discussed inthispaper. Actually, otherdifferent modulation modesofSVM forMatrix converter areworthstudying. Two novelmodulation modesareput forward forMatrix converter forthefirst timeinthispaper, expanding itsmodulation modesofSVM.First, SVM forMatrix converter isdescribed. Thenthe3modulation modesofSVM for Matrix converter arediscussed carefully. Third, thesimulation modelissetupforeAchmodulation mode.Finally, notonlythe flexibility ofthese threemodulation modesisverified butalso someimportant creative conclusions areobtained bysimulation experiments. Theformer twomodulation modesputforward in thispaperareobviously prior tothemode3 whichisoften studied forMatrixconverter, whichcouldbea theoretically important creativity forMatrix converter. Theyareworthyof further being studied. ~~~~~~n5ncr
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RAM - Three Modulation Modes of SVM for Ac-Ac Matrix Converter
2008 IEEE Conference on Robotics Automation and Mechatronics, 2008Co-Authors: Guo Yougui, Zhu Jian-lin, Deng ChengAbstract:People usually research modulation mode 3 of SVM for Matrix converter discussed in this paper. Actually, other different modulation modes of SVM for Matrix converter are worth studying. Two novel modulation modes are put forward for Matrix converter for the first time in this paper, expanding its modulation modes of SVM. First, SVM for Matrix converter is described. Then the 3 modulation modes of SVM for Matrix converter are discussed carefully. Third, the simulation model is set up for eAch modulation mode. Finally, not only the flexibility of these three modulation modes is verified but also some important creative conclusions are obtained by simulation experiments. The former two modulation modes put forward in this paper are obviously prior to the mode 3 which is often studied for Matrix converter, which could be a theoretically important creativity for Matrix converter. They are worthy of further being studied.
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Direct torque control for induction mAchine based on Ac-Ac Matrix converter
2007 7th Internatonal Conference on Power Electronics, 2007Co-Authors: Guo Yougui, Zhu Jian-lin, Chen CaixueAbstract:The combination of Matrix converter with direct torque control is a way towards green energy-saving of the world. It has great sense for theory research and good developing future. First, it is analyzed about working principle of Matrix converter, the control principle and its realization process of direct torque control for induction mAchine inverter-based. Then the comprehensive switching control table is deduced According to the special properties of Matrix converter together with direct torque control for induction mAchine. And the comprehensive modulation strategy can be concluded by looking up the table. Third, the simulation model is set up. The simulation results have verified the feasibilities and advantages of this novel alternative current adjustable speed system. Finally, an adaptive fuzzy PI controller was designed to improve the electric magnetic torque of induction mAchine.
Arif I. Sarwat - One of the best experts on this subject based on the ideXlab platform.
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single phase soft switched Ac Ac Matrix converter with power controller for bidirectional inductive power transfer systems
IEEE Transactions on Industry Applications, 2018Co-Authors: Masood Moghaddami, Arif I. SarwatAbstract:A direct soft-switched single-phase Ac–Ac Matrix converter (MC) for bidirectional inductive power transfer (IPT) systems is proposed. Quantum energy injection/regeneration principle is used to design a simplified digital power controller that enables the converter to establish bidirectional power transfer between the IPT system and single-phase Ac mains at a desired power level. The simplified controller can be implemented using basic logic circuit components, without the need for digital signal processor/field programmable gate array platforms, thereby reducing the complexity and the implementation cost. The converter benefits from resonance frequency trAcking capability for the synchronization of switching operations of the converter with the resonant current, which makes it ideal for dynamic IPT systems. Also, it benefits from soft-switching operations to Achieve an enhanced efficiency and low electromagnetic interference. The converter is specifically suitable for establishing grid-to-vehicle and vehicle-to-grid connections through inductive electric vehicle charging/discharging systems. The proposed converter is analyzed theoretically, is simulated in MATLAB/Simulink, and finally is verified experimentally at low power on a case study IPT system. The results show that the proposed MC can effectively establish bidirectional power transfer at different power levels with soft-switching operation and resonance frequency trAcking capability.
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A Three-Phase Ac-Ac Matrix Converter with Simplified Bidirectional Power Control for Inductive Power Transfer Systems
2018 IEEE Transportation Electrification Conference and Expo (ITEC), 2018Co-Authors: Masood Moghaddami, Arif I. SarwatAbstract:The use of direct three-phase Ac-Ac Matrix converter with bidirectional power control for inductive power transfer (IPT) systems is proposed. The converter enables direct power conversion between low-frequency three-phase Ac mains and high-frequency IPT systems. A digital power controller is designed and developed to regulate the power transfer rate at the desired level in both directions. A simplified circuit for the bidirectional power controller is presented which can be implemented with a few number of logic components or using a Field Programmable Gate Array (FPGA). The controller enables soft-switching operations and benefits from the resonance frequency trAcking capability to maintain the high-efficiency power transmission at any operating conditions. The converter Achieves bidirectional power transfer which is specifically useful for establishing grid-to-vehicle (G2V) and vehicle-to-grid (V2G) connections through inductive electric vehicle (EV) charging/discharging systems. Also, the proposed converter can be employed in dynamic IPT systems as it can cope with variations of the system. The controller design methodology, simulation analysis, and the preliminary experimental results of the proposed Matrix converter on a case study inductive battery charging system are presented in detail.
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Single-Stage Three-Phase Ac–Ac Matrix Converter for Inductive Power Transfer Systems
IEEE Transactions on Industrial Electronics, 2016Co-Authors: Masood Moghaddami, Arash Anzalchi, Arif I. SarwatAbstract:A direct three-phase Ac–Ac Matrix converter for inductive power transfer (IPT) systems with soft-switching operation is introduced. The proposed topology is expected to have a high reliability and extended lifetime due to the soft-switching operation and elimination of short-life electrolytic capAcitors. The soft-switching operation will also reduce switching stress, switching loss, and electromagnetic interference of the converter. A variable-frequency control strategy based on the energy-injection and free-oscillation technique is used to regulate the resonant current, the resonant voltage, and the output power. With the use of reverse-blocking switches, the proposed converter can be built with a reduced number of switches (only seven), which will consequently increase the reliability and efficiency and reduce the cost of the converter. The converter operates in eight modes, which are described in detail. With the use of the proposed converter as the primary converter, simulation analysis and experimental implementations on a case study IPT system show that the current regulation control method can fully regulate the output current and output power around user-defined reference values, thus making it suitable for dynamic IPT applications, where the system has inherent variations.
Sosthenes Karugaba - One of the best experts on this subject based on the ideXlab platform.
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Carrier-based modulation of non-square multi-phase Ac-Ac Matrix converters
2010 IEEE International Symposium on Industrial Electronics, 2010Co-Authors: Olorunfemi Ojo, Meharegzi Abreham, Sosthenes Karugaba, Olusola A. KomolafeAbstract:This paper sets forth the process for the determination of the expressions for the modulation signals required to generate the switching pulses for non-square Ac-Ac Matrix converters. Using the 5 × 3 Matrix converter as an example, the converter model is set forth and computer simulation results are presented to demonstrate the possibility of unity input power fActor operation and generation of desired output three-phase balanced voltages.
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Modulation schemes for five-phase to three-phase Ac-Ac Matrix converters
2010 IEEE Energy Conversion Congress and Exposition, 2010Co-Authors: Melaku Mihret, Olorunfemi Ojo, Meharegzi Abreham, Sosthenes KarugabaAbstract:The Ac-Ac Matrix converters are pulse-width modulated using either a carrier-based or spAce vector modulation techniques. This paper presents these two approAches as they relate to the non-square 5 × 3 converter design targeted for a five-phase voltage source providing real and Active powers for three-phase power systems found in high power applications such as on-board ship power systems. It is desirable to be able to synthesize the three-phase voltages with minimum harmonics and the highest voltage gain possible. Furthermore, the input power fActor of the converter is to be variable, even to be unity. These goals are Achieved with the determined modulation schemes. Computer simulations are given to validate the analytic modulation methods set forth, to demonstrate the waveform synthesis and the Achievement of the unity input power fActor.
Zbigniew Fedyczak - One of the best experts on this subject based on the ideXlab platform.
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Implementation of three-phase frequency converters based on PWM Ac Matrix-reActance chopper with buck-boost topology
2009Co-Authors: Zbigniew Fedyczak, Pawel Szczesniak, Jacek Kaniewski, Grzegorz TadraAbstract:This paper deals with three-phase direct Matrix-reActance frequency converters (MRFC) based on unipolar PWM Ac Matrix-reActance choppers (MRC). EAch MRC with conventional topology has two synchronous-connected switches (SCS) sets. In the MRFC, unlike the MRC topology, one of SCS sets is replAced by a Matrix-connected switches (MCS) set in order to make possible of the load voltage frequency change. This paper presents a design and implementation of two of nine solutions of the MRFC which based on MRC with buck-boost topology. In proposed realizations 9 bipolar and bidirectional IGBT switches plus 3 bipolar and unidirectional IGBT switches are used. A simple low frequency transfer Matrix control strategy (modified classical Venturini control strategy) is applied to control of the voltage or current source MC. The modification depends on MC switching during time interval, which is a part of the sequence period. The for step current-direction-based commutation strategy is also used. The specialized DSP and FPGA cards are used in the control circuit realization. Experimental test results of ca 1 kVA laboratory model are presented to confirm the viability of the proposed MRFC solutions.
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New family of Matrix-reActance frequency converters based on unipolar PWM Ac Matrix-reActance choppers
2008 13th International Power Electronics and Motion Control Conference, 2008Co-Authors: Zbigniew Fedyczak, Pawel Szczesniak, Igor KorotyeyevAbstract:This paper deals with three-phase direct Matrix-reActance frequency converters (MRFC) based on unipolar PWM Ac Matrix-reActance choppers (MRC). The topologies of the proposed MRFC are based on a three-phase unipolar MRC structure. EAch MRC with conventional topology has two synchronous-connected switches (SCS) sets. In the MRFC, unlike the MRC topology, one of SCS sets is replAced by a Matrix-connected switches (MCS) set in order to make possible of the load voltage frequency change. Six new topologies of the MRFC based on MRC boost, buck-boost, Cuk, Zeta or SEPIC structures are presented. Through the generation concept of the proposed converters both the description of above-mentioned converter topologies and general description of the control strategies are presented. The structure of the proposed MRFC contains a three-phase Matrix converter (MC), which is introduced instead of the source or load SCS used in unipolar MRC. The step-down or step-up of the MC set is dependent on the input and output voltage or current source configurations. Analysis determining the location where the MC should be introduced is realized by means of the one-cycle switched models with suitable voltage and current sources introduced instead of the capAcitors and inductors respectively. Furthermore, exemplary results of the simplified theoretical analysis, based on the averaged state spAce method, as well as simulation test results obtained for a classical Venturini control strategy of MC, are also presented as an initial verification of the properties of the proposed converters.
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Single-phase serial Ac voltage controller based on bipolar PWM Ac Matrix-reActance chopper
2005 European Conference on Power Electronics and Applications, 2005Co-Authors: Zbigniew Fedyczak, L. Frackowiak, M. Jankowski, Adam KempskiAbstract:This paper deals with a new solution for a single-phase serial Ac voltage controller. In this converter the bipolar PWM Ac Matrix-reActance chopper (MRC), based on cuk B2 topology and auxiliary transformer, are applied. The MRC applied in this controller make possible the bipolar voltage conversion with magnitude of voltage transformation function greater than one. The peak voltage detection method in the control circuit is applied to fast control of the load voltage changes. The paper presents a detailed description of the controller. The steady state theoretical analysis based on an averaged model of the presented controller is used. Furthermore, simulation and experimental test results of 3 kVA models are provided to confirm and verify the theoretical approAch
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A comparison of basic properties of single-phase serial Ac voltage controllers using bipolar PWM chopper
2005 European Conference on Power Electronics and Applications, 2005Co-Authors: Zbigniew Fedyczak, M. Jankowski, Pawel SzczesniakAbstract:This paper deals with two solutions for single-phase serial Ac voltage controllers with bipolar PWM chopper. In these converters, either the bipolar PWM Ac Matrix chopper (MC) based on full-bridge topology or the bipolar PWM Ac Matrix-reActance chopper (MRC) based on Cuk B2 topology and auxiliary transformer is applied. The MRC, in distinction to MC, has a magnitude of voltage transformation function greater than one. The peak detection method in the control circuit of both controller solutions is applied for fast control of the load voltage changes. The steady state theoretical analysis based on averaged models and transient state analysis based on small-signal averaged models of the presented controllers are employed. Furthermore, simulation and experimental test results are provided to confirm and verify the theoretical approAch. On the basis of these investigations a comparative study of the results showing performance of both controller solutions is presented
