The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform

Kyung-seo Kim - One of the best experts on this subject based on the ideXlab platform.

  • Flux-Weakening Strategy of an Induction Machine Driven by an Electrolytic-Capacitor-Less Inverter
    IEEE Transactions on Industry Applications, 2011
    Co-Authors: Anno Yoo, Seung-ki Sul, Hye-seung Kim, Kyung-seo Kim
    Abstract:

    This paper presents a novel flux-weakening strategy for an induction machine driven by an electrolytic-capacitor-less inverter. In the electrolytic-capacitor-less inverter, the dc-link voltage is fluctuating at six times the frequency of the input Three-Phase Source due to its small dc-link capacitance. Hence, the decoupling of the fluctuation and maximum utilization of the dc-link voltage is a major issue in the electrolytic-capacitor-less inverter. In this paper, the cost function is set to increase the voltage utilization of the inverter for the flux-weakening operation of an induction machine. With the proposed flux-weakening strategy, the operating speed of the induction machine is extended above the base speed without any stability problems. The experimental results show the effectiveness of the proposed strategy.

  • Flux weakening strategy of an induction machine driven by an electrolytic capacitor-less inverter
    2009 IEEE Energy Conversion Congress and Exposition, 2009
    Co-Authors: Anno Yoo, Seung-ki Sul, Sunja Kim, Kyung-seo Kim
    Abstract:

    This paper presents a novel flux weakening strategy of an induction machine driven by an electrolytic capacitor-less inverter. In the electrolytic capacitor-less inverter, the DC-link voltage is fluctuating at six times of frequency of input three phase Source due to its small DC-link capacitance. Hence, the decoupling of the fluctuation and maximum utilization of the DC-link voltage is the major issue in the electrolytic capacitor-less inverter. In this paper, the cost function is set to increase the voltage utilization of the inverter for the flux weakening operation of an induction machine. By the proposed cost function and flux weakening strategy, the operating speed of the induction machine is extended above base speed without any stability problem. The experimental results show the effectiveness of proposed strategy.

Yung-chuan Lee - One of the best experts on this subject based on the ideXlab platform.

  • Three-Phase power quality compensator under the unbalanced Sources and nonlinear loads
    IEEE Transactions on Industrial Electronics, 2004
    Co-Authors: Bor-ren Lin, Yung-chuan Lee
    Abstract:

    A Three-Phase voltage-Source inverter for a power quality compensator under the unbalanced mains and nonlinear loads is proposed to provide balanced Three-Phase Source current and improve input power factor. The proposed converter is based on the conventional Three-Phase voltage-Source inverter with three additional ac power switches to achieve three-level pulsewidth modulation. The voltage stress of three ac power switches is clamped to half the dc-link voltage. The balanced reference mains currents are estimated using the dc-bus voltage and load currents. A proportional-integral voltage controller is used in the outer loop to compensate the switching losses of the voltage-Source inverter. To perform the integrated power quality compensation, a hysteresis current control scheme is adopted to track the balanced line current command in phase with mains voltage. Three voltage levels are generated on the ac terminal of the proposed inverter. Computer simulation and experimental results are provided to verify the effectiveness of the proposed control scheme.

  • Analysis and implementation of shunt active power filter with three-level PWM scheme
    The Fifth International Conference on Power Electronics and Drive Systems 2003. PEDS 2003., 1
    Co-Authors: Bor-ren Lin, Chun-hao Huang, Tsung-yu Yang, Yung-chuan Lee
    Abstract:

    A Three-Phase four-wire voltage Source inverter for power quality compensator under the balanced and unbalanced conditions is proposed to provide balanced Three-Phase Source currents and improve input power factor. The proposed inverter is based on the conventional Three-Phase voltage Source inverter with three additional AC power switches to perform three-level pulse width modulation. The voltage stress of three AC power switches is clamped to half DC-link voltage. The balanced reference line currents are estimated using the DC bus voltage and load currents. A voltage controller is used in the outer loop control to compensate the switching losses of the voltage Source inverter. To perform the integrated power quality compensation, hysteresis current control scheme is adopted to track the balanced line current commands in phase with mains voltages. Three voltage levels are generated on the AC terminal of the proposed inverter. Simulation results were provided to verify the effectiveness of the proposed control scheme.

Cheng-i Chen - One of the best experts on this subject based on the ideXlab platform.

  • Incorporating hardware-in-the-loop simulation and ADALINE for shunt active power filter design
    2010 5th IEEE Conference on Industrial Electronics and Applications, 2010
    Co-Authors: Rong-chin Hong, Gary W. Chang, C. Y. Chao, Yuan-sun Chu, Cheng-i Chen
    Abstract:

    This paper presents an approach of incorporating hardware-in-the-loop simulation and ADALINE for shunt active power filter (APF) design. Even when the Three-Phase Source voltages are unbalanced and/or distorted and supply to a nonlinear load, the described compensation strategy can compensate the harmonic and neutral current, and thus improve the power factor. After verifying the efficiency of compensation strategy, the APF control strategy is embedded into the digital signal processor (DSP) to verify the feasibility of the proposed strategy on hardware in the loop (HIL) structure. Results show that the proposed approach is effective for shunt APF design.

Anno Yoo - One of the best experts on this subject based on the ideXlab platform.

  • Flux-Weakening Strategy of an Induction Machine Driven by an Electrolytic-Capacitor-Less Inverter
    IEEE Transactions on Industry Applications, 2011
    Co-Authors: Anno Yoo, Seung-ki Sul, Hye-seung Kim, Kyung-seo Kim
    Abstract:

    This paper presents a novel flux-weakening strategy for an induction machine driven by an electrolytic-capacitor-less inverter. In the electrolytic-capacitor-less inverter, the dc-link voltage is fluctuating at six times the frequency of the input Three-Phase Source due to its small dc-link capacitance. Hence, the decoupling of the fluctuation and maximum utilization of the dc-link voltage is a major issue in the electrolytic-capacitor-less inverter. In this paper, the cost function is set to increase the voltage utilization of the inverter for the flux-weakening operation of an induction machine. With the proposed flux-weakening strategy, the operating speed of the induction machine is extended above the base speed without any stability problems. The experimental results show the effectiveness of the proposed strategy.

  • Flux weakening strategy of an induction machine driven by an electrolytic capacitor-less inverter
    2009 IEEE Energy Conversion Congress and Exposition, 2009
    Co-Authors: Anno Yoo, Seung-ki Sul, Sunja Kim, Kyung-seo Kim
    Abstract:

    This paper presents a novel flux weakening strategy of an induction machine driven by an electrolytic capacitor-less inverter. In the electrolytic capacitor-less inverter, the DC-link voltage is fluctuating at six times of frequency of input three phase Source due to its small DC-link capacitance. Hence, the decoupling of the fluctuation and maximum utilization of the DC-link voltage is the major issue in the electrolytic capacitor-less inverter. In this paper, the cost function is set to increase the voltage utilization of the inverter for the flux weakening operation of an induction machine. By the proposed cost function and flux weakening strategy, the operating speed of the induction machine is extended above base speed without any stability problem. The experimental results show the effectiveness of proposed strategy.

  • Input filter analysis and resonance suppression control for electrolytic capacitor-less inverter
    2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009
    Co-Authors: Anno Yoo, Wook-jin Lee, Sunja-kim, Behzad Mirzaeian Dehkordi, Seung-ki Sul
    Abstract:

    This paper presents an analysis on electrolytic capacitor-less inverter and proposes a strategy for resonance suppression control for a DC-link voltage and input current in electrolytic capacitor-less inverter. The proposed electrolytic capacitor-less inverter can operate both in the motoring mode and regenerating mode owing to its inherent bidirectional power flow capability of the active front-end rectifier whose switching frequency is equal to the input line frequency. However, in the electrolytic capacitor-less inverter, the DC-link voltage is fluctuating with six times of the frequency of input three phase Source due to its small DC link capacitance. Also, an input filter should be employed to remove the high frequency component generated by PWM inverter. By the input filter, the DC-link voltage can be resonant, and a specific resonance suppression control is required when the input line-to-line voltage is low and the demanded power is large. In this paper, a novel resonance suppression strategy is proposed for a stable operation of the electrolytic capacitor-less inverter. The experimental results show the effectiveness of proposed strategy.

Bor-ren Lin - One of the best experts on this subject based on the ideXlab platform.

  • Three-Phase power quality compensator under the unbalanced Sources and nonlinear loads
    IEEE Transactions on Industrial Electronics, 2004
    Co-Authors: Bor-ren Lin, Yung-chuan Lee
    Abstract:

    A Three-Phase voltage-Source inverter for a power quality compensator under the unbalanced mains and nonlinear loads is proposed to provide balanced Three-Phase Source current and improve input power factor. The proposed converter is based on the conventional Three-Phase voltage-Source inverter with three additional ac power switches to achieve three-level pulsewidth modulation. The voltage stress of three ac power switches is clamped to half the dc-link voltage. The balanced reference mains currents are estimated using the dc-bus voltage and load currents. A proportional-integral voltage controller is used in the outer loop to compensate the switching losses of the voltage-Source inverter. To perform the integrated power quality compensation, a hysteresis current control scheme is adopted to track the balanced line current command in phase with mains voltage. Three voltage levels are generated on the ac terminal of the proposed inverter. Computer simulation and experimental results are provided to verify the effectiveness of the proposed control scheme.

  • Analysis and implementation of shunt active power filter with three-level PWM scheme
    The Fifth International Conference on Power Electronics and Drive Systems 2003. PEDS 2003., 1
    Co-Authors: Bor-ren Lin, Chun-hao Huang, Tsung-yu Yang, Yung-chuan Lee
    Abstract:

    A Three-Phase four-wire voltage Source inverter for power quality compensator under the balanced and unbalanced conditions is proposed to provide balanced Three-Phase Source currents and improve input power factor. The proposed inverter is based on the conventional Three-Phase voltage Source inverter with three additional AC power switches to perform three-level pulse width modulation. The voltage stress of three AC power switches is clamped to half DC-link voltage. The balanced reference line currents are estimated using the DC bus voltage and load currents. A voltage controller is used in the outer loop control to compensate the switching losses of the voltage Source inverter. To perform the integrated power quality compensation, hysteresis current control scheme is adopted to track the balanced line current commands in phase with mains voltages. Three voltage levels are generated on the AC terminal of the proposed inverter. Simulation results were provided to verify the effectiveness of the proposed control scheme.