Current Source Inverter

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Xiaoqiang Guo - One of the best experts on this subject based on the ideXlab platform.

  • A Programmable Single-Phase Multilevel Current Source Inverter
    IEEE Access, 2019
    Co-Authors: Xiaoqiang Guo, Baocheng Wang
    Abstract:

    The conventional single-phase multilevel Current Source Inverters suffer from the high count of switches for increasing the levels. Therefore, how to generate more levels with reduced-count of switches is attractive. In this paper, a programmable single-phase Current Source Inverter is presented. It can achieve the programmable level output with only five switches. Different from the existing single-phase reduced-count multilevel Inverters, it has the advantages of a simple structure and programmable level output. Finally, the simulation and experimental tests are carried out. And, the experimental results verify the effectiveness of the proposed programmable multilevel Inverter.

  • A New Single-Phase Transformerless Current Source Inverter for Leakage Current Reduction
    Energies, 2018
    Co-Authors: Xiaoqiang Guo, Jianhua Zhang, Jiale Zhou, Baocheng Wang
    Abstract:

    A new single-phase transformerless Current Source Inverter is proposed in this paper. The proposed Inverter can achieve leakage Current reduction, which is crucial for the conventional Current Source Inverter. The basic concept of the proposed solution is to develop the new Inverter by the duality principle from the voltage Source Inverter. The theoretical analysis is carried out to determine the switching states of the proposed Inverter for the leakage Current reduction. Also, a new modulation strategy is presented to achieve the optimized switching states. Finally, the experimental results are presented. Comparing with conventional single-phase Current Source Inverter, the leakage Current can be significantly reduced by the proposed Inverter, which verifies the effectiveness of the proposed solution.

  • Four-Leg Current-Source Inverter With a New Space Vector Modulation for Common-Mode Voltage Suppression
    IEEE Transactions on Industrial Electronics, 2015
    Co-Authors: Xiaoqiang Guo
    Abstract:

    Common-mode voltage (CMV) is one of the most important issues for the power electronics Inverters. An interesting space vector modulation of the three-leg Current-Source Inverter has been reported for the CMV reduction recently. However, it has the disadvantages of the bipolar Current pulses and modulation index range limitation. In order to solve these problems, a four-leg Current-Source Inverter with a new space vector modulation is proposed in this paper. With the proposed method, the system CMV can be significantly reduced without bipolar Current pulses and modulation index range limitation. Finally, the experimental tests are carried out on a four-leg Current-Source Inverter, and the experimental results verify the effectiveness of the proposed method.

Weiqi Wang - One of the best experts on this subject based on the ideXlab platform.

  • an eight switch five level Current Source Inverter
    IEEE Transactions on Power Electronics, 2019
    Co-Authors: Weiqi Wang, Feng Gao, Yongheng Yang, Frede Blaabjerg
    Abstract:

    This paper proposes an eight-switch, three-phase, five-level Current Source Inverter (CSI), which employs only one traditional H6 Inverter and two shunt branches at the dc side to realize the five-level switching. The corresponding space-vector-modulation (SVM) strategy for the proposed CSI topology is also presented, which uses the two shunt-connected power switches to add certain special modulation-state segments to ensure the switching instants completed under lower Current stresses and lower power dissipation. Compared with the state-of-the-art CSI solutions, the proposed topology has a comparable hardware cost as the three-level H6 CSI, while outputs five-level Currents. The low-output total harmonic distortion (THD) may help to reduce the sizes of the passive components in the system, and the modulation scheme reduces the switching and conduction losses of the semiconductor switching devices in the H6 CSI module, which can make it possible to increase the output Current rating of the system in a certain degree. Simulation and experimental results verified the performance of the proposed CSI.

  • eight switch five level Current Source Inverter
    European Conference on Cognitive Ergonomics, 2018
    Co-Authors: Weiqi Wang, Feng Gao, Yongheng Yang, Frede Blaabjerg, Lei Zhang
    Abstract:

    This paper proposes an eight-switch three-phase five-level Current Source Inverter (CSI). The corresponding space vector modulation (SVM) strategy for the proposed CSI topology is also presented. Compared with other five-level CSI topologies, the proposed CSI inherits certain advantages of the full-bridge CSI with a shunt-connected hybrid power switch (i.e., the H7 CSI), simplifies the modulation method, and utilizes fewer power switches with an increased power density. These features make the proposed Inverter cost-effective for CSI systems. Simulation and experimental results are provided, which validates the theoretical discussion and analysis.

  • Soft-switching H7 Current Source Inverter
    2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), 2016
    Co-Authors: Weiqi Wang, Zenggong Cao, Chunyi Wang, Feng Gao
    Abstract:

    This paper proposes a soft-switching DC-AC H7 Current Source Inverter (CSI) with an auxiliary circuitry on DC side and a traditional H6 Inverter bridge, which utilizes CSI boost characteristic and combines the unique advantage of shunt-connected switch in H7 CSI. With the presented shoot-through modulation strategy, the H7 CSI front-end switch is able to work at zero voltage transition (ZVT) mode, and realize zero Current switching (ZCS) for the rear-end CSI circuitry. The proposed Current Source Inverter could achieve soft switching ability for all power switches, and meanwhile guarantee the excellent performance with higher switching frequency. To some extent, the proposed soft-switching H7 Current Source Inverter circuitry could be a promising solution for all CSI systems. MATLAB simulations with PSIM models and experimental verifications have been presented to show the performance of the proposed Inverter.

  • Optimal switching counts modulation of H7 Current Source Inverter
    2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
    Co-Authors: Weiqi Wang, Lei Zhang, Mengxing Chen, Liwei Zhou
    Abstract:

    The Current Source Inverter (CSI) has some application restrictions, especially for the power efficiency problem. The H7 Current Source Inverter is a promising topology since it provides a shunt-connected switching path and significantly reduce the power dissipation. This paper reviews the already published H7 CSI configuration character with its modulation strategy in theory and proposes an optimal modulation scheme which has the minimized hard switching counts. In addition, the grid-tied operational principle has been discussed. The proposed modulation strategy could reduce the working power dissipation, simplify the configuration of the shunt-connected switch, and meanwhile guarantee the zero Current switching ability for the rear-end CSI circuitry. The switching counts and hardware cost are compared between the different modulation schemes to prove the superiority of the proposed optimal switching counts modulation strategy. The simulation and experimental results verified the theoretical findings.

  • Operation and modulation of H7 Current Source Inverter with hybrid SiC and Si semiconductor switches
    2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015
    Co-Authors: Weiqi Wang, Feng Gao, Shuling Rui
    Abstract:

    This paper proposes a H7 Current Source Inverter (CSI) with a single shunt-connected silicon carbide (SiC) switch and traditional H6 CSI circuitry, which could employ the superior characteristics of SiC switch to significantly increase the whole switching frequency with expected low losses simultaneously. A novel modulation scheme for H7 Current Source Inverter is then proposed, which can significantly reduce the switching counts and meanwhile realize the zero Current switching (ZCS) for the rear-end CSI circuitry. The proposed H7 Current Source Inverter can guarantee the high performance and high efficiency with a smaller DC inductor. To some extent, the H7 Current Source Inverter circuitry could be a universal solution for all CSI systems. Matlab simulations and experimental verifications have been presented to show the performance of proposed Inverter.

Baocheng Wang - One of the best experts on this subject based on the ideXlab platform.

  • A Programmable Single-Phase Multilevel Current Source Inverter
    IEEE Access, 2019
    Co-Authors: Xiaoqiang Guo, Baocheng Wang
    Abstract:

    The conventional single-phase multilevel Current Source Inverters suffer from the high count of switches for increasing the levels. Therefore, how to generate more levels with reduced-count of switches is attractive. In this paper, a programmable single-phase Current Source Inverter is presented. It can achieve the programmable level output with only five switches. Different from the existing single-phase reduced-count multilevel Inverters, it has the advantages of a simple structure and programmable level output. Finally, the simulation and experimental tests are carried out. And, the experimental results verify the effectiveness of the proposed programmable multilevel Inverter.

  • A New Single-Phase Transformerless Current Source Inverter for Leakage Current Reduction
    Energies, 2018
    Co-Authors: Xiaoqiang Guo, Jianhua Zhang, Jiale Zhou, Baocheng Wang
    Abstract:

    A new single-phase transformerless Current Source Inverter is proposed in this paper. The proposed Inverter can achieve leakage Current reduction, which is crucial for the conventional Current Source Inverter. The basic concept of the proposed solution is to develop the new Inverter by the duality principle from the voltage Source Inverter. The theoretical analysis is carried out to determine the switching states of the proposed Inverter for the leakage Current reduction. Also, a new modulation strategy is presented to achieve the optimized switching states. Finally, the experimental results are presented. Comparing with conventional single-phase Current Source Inverter, the leakage Current can be significantly reduced by the proposed Inverter, which verifies the effectiveness of the proposed solution.

Jing Bai - One of the best experts on this subject based on the ideXlab platform.

  • Robustness of Current Source Inverter based on H∞ control
    International Journal of Modelling Identification and Control, 2019
    Co-Authors: Shunshoku Kanae, Jing Bai
    Abstract:

    Aiming at the problem that the control performance of the three-phase Current-Source Inverter (CSI) is easily affected by load parameters and external disturbances easily, a robust H∞ control strategy is proposed in this paper. A mathematical model of the three-phase CSI is established. According to the model of CSI with uncertain parameters, the state feedback H∞ controller is designed and the feedback control laws are obtained. A robust H∞ controller based on CSI control system is designed. Finally, the effectiveness and feasibility of the scheme are verified by simulation.

  • Research of the Current Source Inverter H Robust Control Strategy
    DEStech Transactions on Computer Science and Engineering, 2017
    Co-Authors: Jing Bai, Shuo Zhan, Yue-dou Pan
    Abstract:

    Based on Current Source Inverter (CSI) as the research object. In view of the three phase Current Source Inverter control performance is influenced by load parameter variations and external disturbance problem. Put forward a H robust control strategy for the first time. Established and analysis the mathematical model of CSI model. Designed a state feedback robust H controller according to the parameter uncertainty of CSI model. Designed constant H robust controller based on the Current according to system performance requirements to select the weighted function. Finally, the simulation showed the validity and feasibility of the scheme.

  • Research on Attenuating Variable-Rate Reaching Sliding Mode Control Strategy for Three-Phase Current Source Inverter
    Applied Mechanics and Materials, 2014
    Co-Authors: Jing Bai, Xiao Dong, Jian Liu
    Abstract:

    A sliding-mode attenuating variable-rate reaching control strategy for three-phase Current Source Inverter is presented. The proposed control strategy significantly improves solve the exist issues that the slow dynamic characteristic and the output waveform distortion using linear control technology in three-phase Current Source Inverter. In order to facilitate the analysis and design of sliding mode controller, a new mathematical model of three-phase Current Source Inverter is built, and it is further simplified through the spatial coordinate transformation. The switching surfaces and the attenuating variable-rate reaching control law are deduced. Finally, the simulation results verify the effectiveness and feasibility of the control strategy for three-phase Current Source Inverter.

  • Study and Application of Sliding Mode Control Strategy for High-Power Current Source Inverter
    Applied Mechanics and Materials, 2014
    Co-Authors: Jing Bai, Jian Liu
    Abstract:

    For high-power Current Source Inverter work object is a nonlinear time-varying systems, which could easily lead to the Inverter voltage and Current output waveform distortion, this paper firstly proposes a new variable-rate reaching sliding mode control scheme to solve the above problems existing in Current Source Inverter system. In this scheme, we construct the variable structure model of the system, determine the sliding surface, give the variable-rate reaching control law and deduce the sliding domain. At last, the simulation result proves the validity and superiority of the scheme.

Zhongchao Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Generalized multilevel Current Source Inverter topology with self-balancing Current
    Journal of Zhejiang University SCIENCE C, 2010
    Co-Authors: Jian-yu Bao, Weibing Bao, Zhongchao Zhang
    Abstract:

    A generalized single-phase multilevel Current Source Inverter (MCSI) topology with self-balancing Current is proposed, which uses the duality transformation from the generalized multilevel voltage Source Inverter (MVSI) topology. The existing single-phase 8- and 6-switch 5-level Current Source Inverters (CSIs) can be derived from this generalized MCSI topology. In the proposed topology, each intermediate DC-link Current level can be balanced automatically without adding any external circuits; thus, a true multilevel structure is provided. Moreover, owing to the dual relationship, many research results relating to the operation, modulation, and control strategies of MVSIs can be applied directly to the MCSIs. Some simulation results are presented to verify the proposed MCSI topology.

  • multilevel Current Source Inverter topologies based on the duality principle
    Applied Power Electronics Conference, 2010
    Co-Authors: Jian-yu Bao, Weibing Bao, Siran Wang, Zhongchao Zhang
    Abstract:

    This paper explores the issue of constructing multi-level Current Source Inverter (MCSI) topologies using the duality principle. In order to extend the application of duality to the three-phase power electronic circuits which are non-planar, two methods for planar treatment with three-phase voltage Source Inverter (VSI) are presented. Based on such equivalent transformation, an improved topology of three-phase flying-capacitor multi-level voltage Source Inverter (MVSI) is obtained, then a new kind of three-phase MCSI topology is derived from the application of the duality on such MVSI topology. This allows the wealth of existing knowledge relating to modulation of multilevel VSI to be immediately mapped to the multilevel CSI. Analytical results show that the derived MCSI and its corresponding MVSI present dual features such as operations, modulations and control strategies, etc. Some simulation results are given to verify the proposed MCSI structure.

  • A 6-switch single-phase 5-level Current-Source Inverter
    Journal of Zhejiang University-SCIENCE A, 2006
    Co-Authors: Jian-yu Bao, Zhongchao Zhang
    Abstract:

    The new 6-switch single-phase 5-level Current-Source Inverter proposed in this paper was developed by properly simplifying the traditional 8-switch single-phase 5-level Current-Source Inverter, and its operational principle was analyzed. Just like the problem of voltage-unbalance between different levels existing in voltage-Source multilevel Inverters, a similar problem of Current-unbalance between different levels whether for the 8-switch single-phase 5-level Current-Source Inverter, or for the new 6-switch 5-level Current-Source Inverter also exists. A simple Current-balance control method via DC Current feedback is presented here to implement the Current-balance control between different levels. And to reduce the output Current harmonics, PWM control technique was used. Simulation and experimental results showed that this new 6-switch topology operates correctly and that the balance-inductor can almost equally distribute the total DC Current.

  • A new single-phase multilevel Current-Source Inverter
    Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition 2004. APEC '04., 1
    Co-Authors: Yu Xiong, Danjiang Chen, Songquan Deng, Zhongchao Zhang
    Abstract:

    A new single-phase multilevel Current-Source Inverter (CSI) topology is proposed. The structure of this new topology is very simple. The switching strategy that can ensure equal Current division among the branches and Current harmonics reduction is presented. Simulations as well as practical experiments analyze the characteristics of this new topology.

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