Topic
Three-phase
About: Three-phase is a research topic. Over the lifetime, 16801 publications have been published within this topic receiving 159477 citations.
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Papers
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TL;DR: In this paper, a predictive torque control (PTC) scheme was proposed for the B4 inverter-fed induction motor (IM) with the dc-link voltage offset suppression. But, the proposed scheme is limited in its application, as the balance among the phase currents collapses due to the fluctuation of the two dclink capacitor voltages; therefore, its application is limited.
Abstract: The four-switch three-phase (B4) inverter, having a lower number of switches, was first presented for the possibility of reducing the inverter cost, and it became very attractive as it can be utilized in fault-tolerant control to solve the open/short-circuit fault of the six-switch three-phase (B6) inverter. However, the balance among the phase currents collapses due to the fluctuation of the two dc-link capacitor voltages; therefore, its application is limited. This paper proposes a predictive torque control (PTC) scheme for the B4 inverter-fed induction motor (IM) with the dc-link voltage offset suppression. The voltage vectors of the B4 inverter under the fluctuation of the two dc-link capacitor voltages are derived for precise prediction and control of the torque and stator flux. The three-phase currents are forced to stay balance by directly controlling the stator flux. The voltage offset of the two dc-link capacitors is modeled and controlled in the predictive point of view. A lot of simulation and experimental results are presented to validate the proposed control scheme.
127 citations
07 Mar 1993
TL;DR: In this article, a four-wire active filter has been implemented to neutralize current harmonic effects caused by any configuration of nonlinear loads in three-phase, fourwire systems.
Abstract: A four-wire active filter has been implemented. It neutralizes current harmonic effects, caused by any configuration of nonlinear loads in three-phase, four-wire systems. The results of a laboratory implementation are presented. These results are compared with those from computer simulations. Key design issues are discussed. >
127 citations
TL;DR: In this article, a control scheme of three-phase PWM rectifiers eliminating both the AC input voltage and current sensors is proposed, where the phase angle and magnitude of the source voltage are estimated by controlling the deviation between the rectifier current and its model current to be zero.
Abstract: In this paper, a novel control scheme of three-phase PWM rectifiers eliminating both the AC input voltage and current sensors is proposed. The phase angle and the magnitude of the source voltage are estimated by controlling the deviation between the rectifier current and its model current to be zero. The input currents can be reconstructed from switching states of the PWM rectifier and the measured DC link currents. To eliminate the calculation time delay effect of the microprocessor, the currents ahead one sampling period are estimated by a state observer and then are used for feedback control. The proposed control scheme reduces the system cost and improves its reliability. The feasibility of the proposed AC sensorless technique for three-phase PWM rectifiers has been verified through experiments using a high performance DSP chip.
127 citations
TL;DR: In this paper, the authors present an on-line current monitoring system that uses both techniques for fault detection and diagnosis in the stator and in the rotor of three phase induction motors.
127 citations
TL;DR: A control strategy based on single current sensor is proposed for a four-switch three-phase brushless DC (BLDC) motor system to lower cost and improve performance and shows good self-adapted track ability with low current ripple and strong robustness to the given speed reference model.
Abstract: A control strategy based on single current sensor is proposed for a four-switch three-phase brushless DC (BLDC) motor system to lower cost and improve performance. The system's whole working process is divided into two groups. In modes 2, 3, 5, and 6, where phase c works, phase-c current is sensed to control phases a and b, and phase-c current is consequently regulated. In modes 1 and 4, the combination of four suboperating modes for controlling phase-c current is proposed based on detailed analysis on the different rules that these operating modes have on phase-c current. Phase-c current is maintained at nearly zero level first, and phase- a and phase-b currents are regulated by speed circle. To improve control performance, a single-neuron adaptive proportional-integral (PI) algorithm is adopted to realize the speed regulator. Simulation and experimental systems are set up to verify the proposed strategy. According to simulation and experimental results, the proposed strategy shows good self-adapted track ability with low current ripple and strong robustness to the given speed reference model. Also, the structure of the drive is simplified.
126 citations