The Experts below are selected from a list of 56280 Experts worldwide ranked by ideXlab platform
K. K. Kumar - One of the best experts on this subject based on the ideXlab platform.
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Effect of Zero-Vector Placement in a Dual-Inverter Fed Open-End Winding Induction-Motor Drive With a Decoupled Space-Vector PWM Strategy
IEEE Transactions on Industrial Electronics, 2008Co-Authors: V T Somasekhar, S. Srinivas, K. K. KumarAbstract:An open-end winding induction-motor drive with two two-level inverters achieves three-level inversion. The drawback of this configuration is the presence of a high Zero-sequence current, stressing the semiconductor switching devices and the motor. To avoid this, two isolated dc power supplies are needed to feed individual inverters. In this paper, it is shown that it is possible to operate this drive with a single dc power supply, with reasonable engineering compromises. The new decoupled space-Vector-based pulsewidth modulation (PWM) strategy proposed in this paper achieves this objective. This PWM strategy exploits the dependence of the Zero-sequence voltage on the placement of the Zero-Vector of individual inverters. It is shown that the Zero-sequence voltage of the dual-inverter system is suppressed by forcing the Zero-sequence voltage of the individual inverters to a value of Zero, in the average sense, in each sampling-time interval. This strategy, therefore, achieves a dynamic balancing of the Zero-sequence current. It is also shown that this PWM scheme achieves the center spacing of effective-time period for the dual-inverter drive and its associated advantages. In addition, the effect of the placement of the Zero-Vector for individual inverters on the dual-inverter drive is investigated, and the experimental results are presented.
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effect of Zero Vector placement in a dual inverter fed open end winding induction motor drive with alternate sub hexagonal center pwm switching scheme
IEEE Transactions on Power Electronics, 2008Co-Authors: V T Somasekhar, S. Srinivas, K. K. KumarAbstract:Three-level inversion can be achieved by the cascade connection of two two-level inverters to an open-end winding induction motor. Several space Vector based pulsewidth modulation (PWM) control strategies have been proposed for this power circuit configuration in the past. It is known that space Vector modulation offers a degree of freedom in its implementation with regard to the distribution of the Zero-Vector. In this paper, the effect of placement of Zero-Vector for the implementation of space Vector based PWM techniques for a dual-inverter fed open-end winding induction motor drive is reported. Apart from constructing a consistent theoretical frame work, experimental results with continuous and discontinuous PWM are presented in this paper and all the cases are compared.
Heng Nian - One of the best experts on this subject based on the ideXlab platform.
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Zero sequence current suppression strategy of open winding pmsg system with common dc bus based on Zero Vector redistribution
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Yijie Zhou, Heng NianAbstract:The open-winding configuration with a common dc bus provides a Zero-sequence current loop which allows the Zero-sequence current flowing. With the application in permanent magnet synchronous generator (PMSG) systems, the existing Zero-sequence current is inevitably caused by the common mode voltage generated by pulsewidth modulation (PWM) techniques and the third back EMF by the inherent flux harmonic component. With the mathematical modeling analysis, the Zero-sequence equivalent circuit based on the PMSG system is proposed. Meanwhile, a Zero-sequence current suppression controller is designed. In this paper, a Zero Vector redistribution PWM technique is proposed. With this technique, the dwell times of Zero Vectors (000) and (111) for both converters are determined. Meanwhile, it gives the Zero-sequence component overmodulation analysis. Both the control method and improved PWM technique are implemented in a 1-kW open-winding PMSG experimental setup, and the experimental results are discussed.
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Zero sequence current suppression strategy of open winding pmsg system with common dc bus based on Zero Vector redistribution
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Yijie Zhou, Heng NianAbstract:The open-winding configuration with a common dc bus provides a Zero-sequence current loop which allows the Zero-sequence current flowing. With the application in permanent magnet synchronous generator (PMSG) systems, the existing Zero-sequence current is inevitably caused by the common mode voltage generated by pulsewidth modulation (PWM) techniques and the third back EMF by the inherent flux harmonic component. With the mathematical modeling analysis, the Zero-sequence equivalent circuit based on the PMSG system is proposed. Meanwhile, a Zero-sequence current suppression controller is designed. In this paper, a Zero Vector redistribution PWM technique is proposed. With this technique, the dwell times of Zero Vectors (000) and (111) for both converters are determined. Meanwhile, it gives the Zero-sequence component overmodulation analysis. Both the control method and improved PWM technique are implemented in a 1-kW open-winding PMSG experimental setup, and the experimental results are discussed.
V T Somasekhar - One of the best experts on this subject based on the ideXlab platform.
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Effect of Zero-Vector Placement in a Dual-Inverter Fed Open-End Winding Induction-Motor Drive With a Decoupled Space-Vector PWM Strategy
IEEE Transactions on Industrial Electronics, 2008Co-Authors: V T Somasekhar, S. Srinivas, K. K. KumarAbstract:An open-end winding induction-motor drive with two two-level inverters achieves three-level inversion. The drawback of this configuration is the presence of a high Zero-sequence current, stressing the semiconductor switching devices and the motor. To avoid this, two isolated dc power supplies are needed to feed individual inverters. In this paper, it is shown that it is possible to operate this drive with a single dc power supply, with reasonable engineering compromises. The new decoupled space-Vector-based pulsewidth modulation (PWM) strategy proposed in this paper achieves this objective. This PWM strategy exploits the dependence of the Zero-sequence voltage on the placement of the Zero-Vector of individual inverters. It is shown that the Zero-sequence voltage of the dual-inverter system is suppressed by forcing the Zero-sequence voltage of the individual inverters to a value of Zero, in the average sense, in each sampling-time interval. This strategy, therefore, achieves a dynamic balancing of the Zero-sequence current. It is also shown that this PWM scheme achieves the center spacing of effective-time period for the dual-inverter drive and its associated advantages. In addition, the effect of the placement of the Zero-Vector for individual inverters on the dual-inverter drive is investigated, and the experimental results are presented.
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effect of Zero Vector placement in a dual inverter fed open end winding induction motor drive with alternate sub hexagonal center pwm switching scheme
IEEE Transactions on Power Electronics, 2008Co-Authors: V T Somasekhar, S. Srinivas, K. K. KumarAbstract:Three-level inversion can be achieved by the cascade connection of two two-level inverters to an open-end winding induction motor. Several space Vector based pulsewidth modulation (PWM) control strategies have been proposed for this power circuit configuration in the past. It is known that space Vector modulation offers a degree of freedom in its implementation with regard to the distribution of the Zero-Vector. In this paper, the effect of placement of Zero-Vector for the implementation of space Vector based PWM techniques for a dual-inverter fed open-end winding induction motor drive is reported. Apart from constructing a consistent theoretical frame work, experimental results with continuous and discontinuous PWM are presented in this paper and all the cases are compared.
Yijie Zhou - One of the best experts on this subject based on the ideXlab platform.
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Zero sequence current suppression strategy of open winding pmsg system with common dc bus based on Zero Vector redistribution
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Yijie Zhou, Heng NianAbstract:The open-winding configuration with a common dc bus provides a Zero-sequence current loop which allows the Zero-sequence current flowing. With the application in permanent magnet synchronous generator (PMSG) systems, the existing Zero-sequence current is inevitably caused by the common mode voltage generated by pulsewidth modulation (PWM) techniques and the third back EMF by the inherent flux harmonic component. With the mathematical modeling analysis, the Zero-sequence equivalent circuit based on the PMSG system is proposed. Meanwhile, a Zero-sequence current suppression controller is designed. In this paper, a Zero Vector redistribution PWM technique is proposed. With this technique, the dwell times of Zero Vectors (000) and (111) for both converters are determined. Meanwhile, it gives the Zero-sequence component overmodulation analysis. Both the control method and improved PWM technique are implemented in a 1-kW open-winding PMSG experimental setup, and the experimental results are discussed.
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Zero sequence current suppression strategy of open winding pmsg system with common dc bus based on Zero Vector redistribution
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Yijie Zhou, Heng NianAbstract:The open-winding configuration with a common dc bus provides a Zero-sequence current loop which allows the Zero-sequence current flowing. With the application in permanent magnet synchronous generator (PMSG) systems, the existing Zero-sequence current is inevitably caused by the common mode voltage generated by pulsewidth modulation (PWM) techniques and the third back EMF by the inherent flux harmonic component. With the mathematical modeling analysis, the Zero-sequence equivalent circuit based on the PMSG system is proposed. Meanwhile, a Zero-sequence current suppression controller is designed. In this paper, a Zero Vector redistribution PWM technique is proposed. With this technique, the dwell times of Zero Vectors (000) and (111) for both converters are determined. Meanwhile, it gives the Zero-sequence component overmodulation analysis. Both the control method and improved PWM technique are implemented in a 1-kW open-winding PMSG experimental setup, and the experimental results are discussed.
S. Srinivas - One of the best experts on this subject based on the ideXlab platform.
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Effect of Zero-Vector Placement in a Dual-Inverter Fed Open-End Winding Induction-Motor Drive With a Decoupled Space-Vector PWM Strategy
IEEE Transactions on Industrial Electronics, 2008Co-Authors: V T Somasekhar, S. Srinivas, K. K. KumarAbstract:An open-end winding induction-motor drive with two two-level inverters achieves three-level inversion. The drawback of this configuration is the presence of a high Zero-sequence current, stressing the semiconductor switching devices and the motor. To avoid this, two isolated dc power supplies are needed to feed individual inverters. In this paper, it is shown that it is possible to operate this drive with a single dc power supply, with reasonable engineering compromises. The new decoupled space-Vector-based pulsewidth modulation (PWM) strategy proposed in this paper achieves this objective. This PWM strategy exploits the dependence of the Zero-sequence voltage on the placement of the Zero-Vector of individual inverters. It is shown that the Zero-sequence voltage of the dual-inverter system is suppressed by forcing the Zero-sequence voltage of the individual inverters to a value of Zero, in the average sense, in each sampling-time interval. This strategy, therefore, achieves a dynamic balancing of the Zero-sequence current. It is also shown that this PWM scheme achieves the center spacing of effective-time period for the dual-inverter drive and its associated advantages. In addition, the effect of the placement of the Zero-Vector for individual inverters on the dual-inverter drive is investigated, and the experimental results are presented.
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effect of Zero Vector placement in a dual inverter fed open end winding induction motor drive with alternate sub hexagonal center pwm switching scheme
IEEE Transactions on Power Electronics, 2008Co-Authors: V T Somasekhar, S. Srinivas, K. K. KumarAbstract:Three-level inversion can be achieved by the cascade connection of two two-level inverters to an open-end winding induction motor. Several space Vector based pulsewidth modulation (PWM) control strategies have been proposed for this power circuit configuration in the past. It is known that space Vector modulation offers a degree of freedom in its implementation with regard to the distribution of the Zero-Vector. In this paper, the effect of placement of Zero-Vector for the implementation of space Vector based PWM techniques for a dual-inverter fed open-end winding induction motor drive is reported. Apart from constructing a consistent theoretical frame work, experimental results with continuous and discontinuous PWM are presented in this paper and all the cases are compared.
