The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Keliang Zhou - One of the best experts on this subject based on the ideXlab platform.
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Universal Fractional-Order Design of Linear Phase Lead Compensation Multirate Repetitive Control for PWM Inverters
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Zhichao Liu, Bin Zhang, Keliang ZhouAbstract:Repetitive control (RC) with linear phase Lead Compensation provides a simple but very effective control solution for any periodic signal with a known period. Multirate repetitive control (MRC) with a downsampling rate can reduce the need of memory size and computational cost, and then Leads to a more feasible design of the plug-in RC systems in practical applications. However, with fixed sampling rate, both MRC and its linear phase Lead compensator are sensitive to the ratio of the sampling frequency to the frequency of interested periodic signals: 1) MRC might fails to exactly compensate the periodic signal in the case of a fractional ratio; 2) linear phase Lead Compensation might fail to enable MRC to achieve satisfactory performance in the case of a low ratio. In this paper, a universal fractional-order design of linear phase Lead Compensation MRC is proposed to tackle periodic signals with high accuracy, fast dynamic response, good robustness, and cost-effective implementation regardless of the frequency ratio, which offers a unified framework for housing various RC schemes in extensive engineering application. An application example of programmable ac power supply is explored to comprehensively testify the effectiveness of the proposed control scheme.
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Fractional-order phase Lead Compensation for multi-rate repetitive control on three-phase PWM DC/AC inverter
2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016Co-Authors: Zhichao Liu, Bin Zhang, Keliang ZhouAbstract:For constant voltage constant frequency pulse-width modulation (PWM) inverter system, repetitive control (RC) can achieve zero steady-state tracking error for any periodic signal. Multi-rate repetitive control (MRC), which is featured by a fast system sampling rate and a reduced RC rate, is able to lower CPU computation load while achieving low tracking error and fast convergence speed. To accurately compensate the phase lag of MRC, this paper proposes a fractional-order phase Lead Compensation solution to further improve the tracking performance. Implemented with a Lagrange polynomial, the fractional-order phase Lead compensator has more accurate and flexible phase Lead Compensation than traditional phase Lead compensator. Experimental results are provided to show the effectiveness of the proposed fractional-order phase Lead Compensation.
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Performance improvement of repetitive controlled PWM inverters: A phase-Lead Compensation solution
International Journal of Circuit Theory and Applications, 2008Co-Authors: Bin Zhang, Keliang Zhou, Yigang Wang, Danwei WangAbstract:The Compensation of the phase lag plays an important role in the improvement of convergence rate, tracking accuracy, and robustness of repetitive controller. However, it is often difficult to compensate the system phase lag exactly due to variation of the load and unknown disturbances. An alternative way is to provide a simple but effective phase Compensation to compensate the phase lag in a frequency band that contains the major tracking error components. With this motivation, a repetitive control scheme with a linear phase-Lead compensator is proposed and applied to the control of constant-voltage constant-frequency pulse-width modulated DC–AC inverters. Detailed analysis of phase Compensation on system stability is provided, and conditions for the design of phase Compensation are derived. The experimental results under different loads and load changes show that the proposed scheme can achieve high tracking accuracy, low total harmonic distortion, and fast dynamic response. Copyright © 2008 John Wiley & Sons, Ltd.
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linear phase Lead Compensation repetitive control of a cvcf pwm inverter
IEEE Transactions on Industrial Electronics, 2008Co-Authors: Bin Zhang, Keliang Zhou, Danwei Wang, Yigang WangAbstract:This paper presents a simple and efficient linear phase Lead Compensation repetitive control scheme for engineers to develop high-performance power converter systems. The linear phase Lead Compensation helps a repetitive controller to achieve faster convergence rate, higher tracking accuracy, and wider stability region. In the proposed scheme, the phase Lead Compensation repetitive controller is plugged into generic state-feedback-controlled converter systems. Its comprehensive synthesis, which involves principle, analysis, design, modeling, implementation, and experiments, is systematically and completely presented in great detail. A complete series of experiments is successfully carried out to verify the solution.
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high performance repetitive control of pwm dc ac converters with real time phase Lead fir filter
IEEE Transactions on Circuits and Systems Ii-express Briefs, 2006Co-Authors: Keliang Zhou, Danwei Wang, Bin Zhang, Jingcheng WangAbstract:The significance of phase-Lead Compensation is revealed for repetitive control systems in terms of tracking accuracy and transient. A real-time noncausal phase-Lead FIR filter is proposed to improve the performance of add-on repetitive controlled constant-voltage constant-frequency PWM dc-ac converters. The experiment results show that nearly perfect tracking, low total harmonics distortion, and satisfactory transient are achieved in the proposed repetitive-controlled PWM converter under both linear load and rectifier load
Bin Zhang - One of the best experts on this subject based on the ideXlab platform.
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Universal Fractional-Order Design of Linear Phase Lead Compensation Multirate Repetitive Control for PWM Inverters
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Zhichao Liu, Bin Zhang, Keliang ZhouAbstract:Repetitive control (RC) with linear phase Lead Compensation provides a simple but very effective control solution for any periodic signal with a known period. Multirate repetitive control (MRC) with a downsampling rate can reduce the need of memory size and computational cost, and then Leads to a more feasible design of the plug-in RC systems in practical applications. However, with fixed sampling rate, both MRC and its linear phase Lead compensator are sensitive to the ratio of the sampling frequency to the frequency of interested periodic signals: 1) MRC might fails to exactly compensate the periodic signal in the case of a fractional ratio; 2) linear phase Lead Compensation might fail to enable MRC to achieve satisfactory performance in the case of a low ratio. In this paper, a universal fractional-order design of linear phase Lead Compensation MRC is proposed to tackle periodic signals with high accuracy, fast dynamic response, good robustness, and cost-effective implementation regardless of the frequency ratio, which offers a unified framework for housing various RC schemes in extensive engineering application. An application example of programmable ac power supply is explored to comprehensively testify the effectiveness of the proposed control scheme.
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Fractional-order phase Lead Compensation for multi-rate repetitive control on three-phase PWM DC/AC inverter
2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016Co-Authors: Zhichao Liu, Bin Zhang, Keliang ZhouAbstract:For constant voltage constant frequency pulse-width modulation (PWM) inverter system, repetitive control (RC) can achieve zero steady-state tracking error for any periodic signal. Multi-rate repetitive control (MRC), which is featured by a fast system sampling rate and a reduced RC rate, is able to lower CPU computation load while achieving low tracking error and fast convergence speed. To accurately compensate the phase lag of MRC, this paper proposes a fractional-order phase Lead Compensation solution to further improve the tracking performance. Implemented with a Lagrange polynomial, the fractional-order phase Lead compensator has more accurate and flexible phase Lead Compensation than traditional phase Lead compensator. Experimental results are provided to show the effectiveness of the proposed fractional-order phase Lead Compensation.
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Performance improvement of repetitive controlled PWM inverters: A phase-Lead Compensation solution
International Journal of Circuit Theory and Applications, 2008Co-Authors: Bin Zhang, Keliang Zhou, Yigang Wang, Danwei WangAbstract:The Compensation of the phase lag plays an important role in the improvement of convergence rate, tracking accuracy, and robustness of repetitive controller. However, it is often difficult to compensate the system phase lag exactly due to variation of the load and unknown disturbances. An alternative way is to provide a simple but effective phase Compensation to compensate the phase lag in a frequency band that contains the major tracking error components. With this motivation, a repetitive control scheme with a linear phase-Lead compensator is proposed and applied to the control of constant-voltage constant-frequency pulse-width modulated DC–AC inverters. Detailed analysis of phase Compensation on system stability is provided, and conditions for the design of phase Compensation are derived. The experimental results under different loads and load changes show that the proposed scheme can achieve high tracking accuracy, low total harmonic distortion, and fast dynamic response. Copyright © 2008 John Wiley & Sons, Ltd.
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linear phase Lead Compensation repetitive control of a cvcf pwm inverter
IEEE Transactions on Industrial Electronics, 2008Co-Authors: Bin Zhang, Keliang Zhou, Danwei Wang, Yigang WangAbstract:This paper presents a simple and efficient linear phase Lead Compensation repetitive control scheme for engineers to develop high-performance power converter systems. The linear phase Lead Compensation helps a repetitive controller to achieve faster convergence rate, higher tracking accuracy, and wider stability region. In the proposed scheme, the phase Lead Compensation repetitive controller is plugged into generic state-feedback-controlled converter systems. Its comprehensive synthesis, which involves principle, analysis, design, modeling, implementation, and experiments, is systematically and completely presented in great detail. A complete series of experiments is successfully carried out to verify the solution.
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high performance repetitive control of pwm dc ac converters with real time phase Lead fir filter
IEEE Transactions on Circuits and Systems Ii-express Briefs, 2006Co-Authors: Keliang Zhou, Danwei Wang, Bin Zhang, Jingcheng WangAbstract:The significance of phase-Lead Compensation is revealed for repetitive control systems in terms of tracking accuracy and transient. A real-time noncausal phase-Lead FIR filter is proposed to improve the performance of add-on repetitive controlled constant-voltage constant-frequency PWM dc-ac converters. The experiment results show that nearly perfect tracking, low total harmonics distortion, and satisfactory transient are achieved in the proposed repetitive-controlled PWM converter under both linear load and rectifier load
K P Louganski - One of the best experts on this subject based on the ideXlab platform.
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current phase Lead Compensation in single phase pfc boost converters with a reduced switching frequency to line frequency ratio
IEEE Transactions on Power Electronics, 2007Co-Authors: K P LouganskiAbstract:Traditional design of the current loop controller in a single-phase power factor correction boost converter is not suitable for applications with higher line frequencies (up to 800 Hz) because of the zero-crossing distortion and high harmonic content due to the current phase Lead effect. Increasing the control bandwidth and switching frequency in order to avoid this effect would reduce converter efficiency and is objectionable. The paper presents the Leading-phase admittance cancellation (LPAC) technique, which improves the current-shaping control structure and eliminates the current phase Lead without increasing the bandwidth requirement. The LPAC method extends the allowable line frequency range from 1/150 to 1/5 of the current loop bandwidth. The LPAC method is load-invariant and superior to other previously proposed methods. The LPAC network can be added to existing designs, which would require only two passive components in the simplest case
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current phase Lead Compensation in single phase pfc boost converters with a reduced switching frequency to line frequency ratio
Applied Power Electronics Conference, 2006Co-Authors: K P LouganskiAbstract:Traditional design of the current loop controller in a single-phase PFC boost converter is not suitable for applications with higher line frequencies (up to 800 Hz) because of the zero-crossing distortion and high harmonic content due to the current phase Lead effect. Increasing the control bandwidth and switching frequency in order to avoid this effect would reduce converter efficiency and is objectionable. The paper presents the Leading-phase admittance cancellation (LPAC) technique, which improves the current-shaping control structure and eliminates the current phase Lead without increasing the bandwidth requirement. The LPAC method extends the allowable line frequency range from 1/150 to 1/5 of the current loop bandwidth. The LPAC method is load-invariant and superior to other previously proposed methods. The LPAC network can be added to existing designs, which would require only two passive components in the simplest case.
Minsung Kim - One of the best experts on this subject based on the ideXlab platform.
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Repetitive Controller With Phase-Lead Compensation for Cuk CCM Inverter
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Byeongcheol Han, Jin S Lee, Minsung KimAbstract:This paper proposes a repetitive controller with phase-Lead Compensation for an unfolding-type Cuk continuous conduction mode (CCM) inverter operating in the CCM. The Cuk CCM inverter features medium power capacity, step up/down ability, and low input/output current ripples, so it is well suited to distributed power generation systems. To achieve accurate tracking of the reference output current, we make the use of the repetitive controller coupled with a conventional proportional-integral controller and a nominal duty ratio. In developing the proposed controller, we use the average model of the Cuk CCM inverter in the grid-connected case. The two right-half plane (RHP) zeros in the transfer function of the Cuk CCM inverter cause phase lag of the closed-loop system; to compensate for the phase lag, we implement a phase-Lead Compensation algorithm in the repetitive control scheme. We also provide detailed and practical design guidelines of the control parameters to develop a stable Cuk CCM inverter. Experimental tests using a 500-W Cuk CCM inverter demonstrate the desirable performance of the proposed control approach.
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iterative learning controller with multiple phase Lead Compensation for dual mode flyback inverter
IEEE Transactions on Power Electronics, 2017Co-Authors: Hyosin Kim, Jin S Lee, Jihsheng Lai, Minsung KimAbstract:This paper proposes an iterative learning control (ILC) scheme for a dual-mode flyback inverter operating in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM). In dealing with more than 200-W power applications, the dual-mode flyback inverter takes advantage of both DCM and CCM operations. However, it is difficult to control the output current because the system gain is quite low in DCM and the system transfer function has a right-half plane zero in CCM. To overcome the problems occurring in DCM and CCM operations, we propose an ILC scheme with multiple phase-Lead Compensation. The ILC is proposed to achieve accurate reference tracking and to reject periodic disturbances. The multiple phase-Lead Compensation technique is then employed to compensate for the effect of different system dynamics. As a theoretical result, we derive the asymptotic stability of the closed-loop system. We also performed the numerical simulations and experimental tests to validate the proposed control approach.
T. Ikeda - One of the best experts on this subject based on the ideXlab platform.
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absolute stability conditions in a fuzzy phase Lead Compensation and their extension to mimo systems
IEEE Transactions on Industrial Electronics, 1998Co-Authors: Kazuo Tanaka, T. IkedaAbstract:This paper presents absolute stability conditions in a fuzzy phase-Lead Compensation and their extension to multi-input-multi-output (MIMO) systems. A theorem which realizes an effective phase-Lead Compensation is recalled. A so-called "transformation matrix" is derived in the theorem. A fuzzy phase-Lead compensator (FPLC) is constructed by using the transformation matrix. The circle condition is employed to derive absolute stability conditions of feedback systems in a fuzzy phase-Lead Compensation. Next, a generalized class of FPLCs is defined, and its stability conditions are derived from the viewpoints of H/sub /spl infin// norm and quadratic stability. It is found that the stability conditions realize stability analysis not only for single-input-single-output (SISO) systems, but also for MIMO systems.
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Stability analysis of feedback systems in fuzzy phase-Lead Compensation
1995 IEEE International Conference on Systems Man and Cybernetics. Intelligent Systems for the 21st Century, 1Co-Authors: Kazuo Tanaka, T. IkedaAbstract:This paper presents stability analysis of feedback systems in fuzzy phase-Lead Compensation. A fuzzy phase-Lead compensator is constructed by using a theorem which realizes an effective phase-Lead Compensation. The circle condition is used to derive stability conditions of feedback systems in fuzzy phase-Lead Compensation. Furthermore, the authors reconsider the derived stability conditions from the viewpoints of H/sup /spl infin// norm.
