The Experts below are selected from a list of 213765 Experts worldwide ranked by ideXlab platform
Yen-shin Lai - One of the best experts on this subject based on the ideXlab platform.
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Pulse-width modulation Technique for BLDCM drives to reduce commutation torque ripple without calculation of commutation time
2010 IEEE Energy Conversion Congress and Exposition, 2010Co-Authors: Yong-kai Lin, Yen-shin LaiAbstract:This paper presents a three-phase pulse-width modulation Technique for brushless DC motor drives to reduce the commutation torque. As compared to previous approaches, the presented Technique doesn't require any torque observer and calculation of commutation time which may be sensitive to motor parameters and require more calculation time. The commutation time for the presented Technique is determined by a detection circuit which consists of simple comparator circuit. Experimental results derived from an FPGA-based controlled BLDCM drive show that the commutation current ripple can be significantly reduced by the presented PWM Technique.
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Virtual stage pulse-width modulation Technique for multilevel inverter/converter
IEEE Transactions on Power Electronics, 2002Co-Authors: Fu-san Shyu, Yen-shin LaiAbstract:The main theme of this paper is to present a new pulse-width modulation (PWM) Technique for multilevel inverter/converter control, which provides more degrees of freedom for specifying the cost function than that for step modulation Technique, for a given hardware. Therefore, the presented Technique eliminates more specified low order harmonics without resorting to the increase of hardware. In comparison with the selective harmonic elimination PWM Technique, for the same number of eliminated low order harmonics, the presented Technique provides the advantages of both lower total harmonic distortion (THD) and less switching. Simulation and experimental results are presented to confirm the above-mentioned claims.
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A new suboptimal pulse-width modulation Technique for per-phase modulation and space vector modulation
IEEE Transactions on Energy Conversion, 1997Co-Authors: Yen-shin Lai, S.r. BowesAbstract:A new suboptimal pulse-width modulation (PWM) Technique for power converter applications is presented in this paper. The Technique is developed by considering both two-phase and three-phase modulation Techniques. In comparison with the existing suboptimal PWM Techniques, the new suboptimal Technique provides online calculation, extension of maximum linear modulation index, and can be applied to both per-phase modulation and space vector modulation. For high switching frequency applications or low switching frequency applications with modulation index above a particular range, the new Technique increases the frequency of the first dominant harmonic by 50% and minimises switching losses. Experimental and simulation results will be presented to confirm the theoretical analysis.
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optimal Pulse-Width Modulation Technique for Per-Phase Modulation
1997Co-Authors: Yen-shin Lai, Sidney R. BowesAbstract:A new suboptimal pulse-width modulation (PWM) Technique will be presented in this paper. The Technique is developed by considering both two-phase and three-phase modulation Techniques. In comparison with the existing suboptimal PWM Techniques, the new suboptimal Technique provides on-line calculation, extension of maximum linear modulation index, and can be applied to both per-phase modulation and space vector modulation. frequency applications or low switching fre with modulation index above a particular rapge, the new Technique increases the frequency of the first dominant harmonic by 50 % and minimises switching losses. Experimental and simulation results will be presented to confirm the theoretical analysis.
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A novel harmonic elimination pulse-width modulation Technique for static converter and drives
APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition, 1Co-Authors: Yen-shin Lai, S.r. BowesAbstract:A novel harmonic elimination PWM (HEPWM) Technique for drives and static power converters is presented. The Technique can be implemented on-line in real-time using a simple software algorithm, without resorting to any traditional off-line numerical Techniques nor extensive lookup tables (LUTs). It is shown that the developed HEPWM Technique can be implemented by calculating switching angles using simple algebraic equations and selecting switching states. In comparison with the previous reports which require the calculation of the switching angles in the first sextant, only the switching angles in the first half sextant are required. Simulation and experimental results are presented to confirm and demonstrate the features of the Technique.
Jiang Xue - One of the best experts on this subject based on the ideXlab platform.
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A Novel Space-Vector Pulse-Width Modulation Technique Based on 8XC196MC
IEEE Transactions on Power Electronics, 2002Co-Authors: Jiang XueAbstract:A novel method which linearizes the modulation for space vector modulation (SVM)inverters in the over modulation range is presented.The Technique manages the transition from the onset of modulation to the six step operation. The method is suitable for a very simple digital implementation. Experimental results obtained by 8XC196MC verified the validity of the method.
Rajashekar P. Mandi - One of the best experts on this subject based on the ideXlab platform.
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Performance analysis of SPWM and SVPWM based three phase voltage source inverter
Control theory & applications, 2016Co-Authors: K. Latha Shenoy, C. Gurudas Nayak, Rajashekar P. MandiAbstract:Three phase voltage-fed PWM inverters are finding increased use in high power industrial drive applications. Various modulation Techniques have been developed to obtain sinusoidal output with better harmonic quality. Among them, the space vector pulse width modulation Technique provides low THD and larger under modulation range compared to sinusoidal pulse width modulation Technique. A revolving reference vector is generated as voltage reference instead of three phase modulating signal in space vector based pulse width modulation Technique
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Performance Analysis of SPWM and SPWM and SVPWM Based Three Phase Voltage source Inverter
2016Co-Authors: Latha K Shenoy, Gurudas C Nayak, Rajashekar P. MandiAbstract:Three phase voltage-fed PWM inverters are finding increased use in high power industrial drive applications. Various modulation Techniques have been developed to obtain sinusoidal output with better harmonic quality. Among them, the space vector pulse width modulation Technique provides low THD and larger under modulation range compared to sinusoidal pulse width modulation Technique. A revolving reference vector is generated as voltage reference instead of three phase modulating signal in space vector based pulse width modulation Technique
A Keyhani - One of the best experts on this subject based on the ideXlab platform.
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control of a fuel cell based z source converter
IEEE Transactions on Energy Conversion, 2007Co-Authors: Jinwoo Jung, A KeyhaniAbstract:This paper presents system modeling, modified space vector PWM implementation (MSVPWM), and control system design of a Z-source converter. For an electrical analysis of the fuel cell powered systems, the fuel cell system is modeled by an R-C circuit including its voltage-current polarization characteristics. A discrete-time state space equation is given to implement digital control and a space vector pulse-width modulation Technique is modified to realize the shoot-through zero vectors that boost the dc-link voltage. Three discrete-time controllers and an asymptotic observer are designed.
S.r. Bowes - One of the best experts on this subject based on the ideXlab platform.
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A new suboptimal pulse-width modulation Technique for per-phase modulation and space vector modulation
IEEE Transactions on Energy Conversion, 1997Co-Authors: Yen-shin Lai, S.r. BowesAbstract:A new suboptimal pulse-width modulation (PWM) Technique for power converter applications is presented in this paper. The Technique is developed by considering both two-phase and three-phase modulation Techniques. In comparison with the existing suboptimal PWM Techniques, the new suboptimal Technique provides online calculation, extension of maximum linear modulation index, and can be applied to both per-phase modulation and space vector modulation. For high switching frequency applications or low switching frequency applications with modulation index above a particular range, the new Technique increases the frequency of the first dominant harmonic by 50% and minimises switching losses. Experimental and simulation results will be presented to confirm the theoretical analysis.
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A novel harmonic elimination pulse-width modulation Technique for static converter and drives
APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition, 1Co-Authors: Yen-shin Lai, S.r. BowesAbstract:A novel harmonic elimination PWM (HEPWM) Technique for drives and static power converters is presented. The Technique can be implemented on-line in real-time using a simple software algorithm, without resorting to any traditional off-line numerical Techniques nor extensive lookup tables (LUTs). It is shown that the developed HEPWM Technique can be implemented by calculating switching angles using simple algebraic equations and selecting switching states. In comparison with the previous reports which require the calculation of the switching angles in the first sextant, only the switching angles in the first half sextant are required. Simulation and experimental results are presented to confirm and demonstrate the features of the Technique.
