This paper presents dynamic voltage restorer (DVR) with vectorcontrol strategy for mitigating power quality in power distribution systems. Whenever power quality problems, voltage sag/swell, occur DVR has to automati...
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This paper presents dynamic voltage restorer (DVR) with vectorcontrol strategy for mitigating power quality in power distribution systems. Whenever power quality problems, voltage sag/swell, occur DVR has to automatically detect and inject voltage components. The detection unit should be fast enough to know the variation of all phase voltages, including magnitude and phase, to trigger the DVR to inject appropriate voltage components with required phase angles within very short period of time. Here, control strategy adopted for driving the DVR plays and important role in its performance. Any delay in the process or incorrect injection would be harmful to sensitive loads that are vulnerable to voltage sag/swell. This paper illustrates vectorcontrol strategy based on decoupling control to enhance performance of DVR during the process of compensation. It was found out that voltage sags/swells can be corrected faster with the proposed control strategy compared to conventional methods.
GaN devices used to drive a three-phase inverter drive motor can greatly improve the switching frequency and increase the power density. However, the traditional microcontroller unit (MCU) controller cannot achieve hi...
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GaN devices used to drive a three-phase inverter drive motor can greatly improve the switching frequency and increase the power density. However, the traditional microcontroller unit (MCU) controller cannot achieve high switching frequency single-cycle control. This paper describes the use of GaN devices in the design of a three-phase motor drive system to drive a permanent magnet synchronous motor and vector control algorithm, that is completely implemented in a field programmable gate array. The system achieves 200-kHz switching frequency single-cycle precise control, as verified by the experimental results.
Recently, the high-performance and high-reliability permanent-magnet synchronous machine (PMSM) has attached intensive attention due to development of electric vehicles (EVs). In this study, in order to improve the ca...
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Recently, the high-performance and high-reliability permanent-magnet synchronous machine (PMSM) has attached intensive attention due to development of electric vehicles (EVs). In this study, in order to improve the capability of output torque, an improved method of interior PMSM (IPMSM) for EV based on winding transformation (WT) strategy is proposed. In the proposed method, the power electronics technology, the vector control algorithm, and the multiple-field analysis including electromagnetic field, fluid field, and temperature field are combined. Therefore, the steady-state and dynamic performances of WT-IPMSM are analysed comprehensively. The accuracy of the temperature field calculation is improved by the electromagnetic-thermal iterative method. Meanwhile, the influence of pulse-width modulation time harmonics caused by inverter on the eddy current loss of PMs and related laws is summarised. Finally, the effectiveness and feasibility of the proposed method is verified by the prototype test.
In this paper, firstly, the function of test-bed of motor-wheel-drive Electric Vehicle has been clarified, the frame structures of test-bed has been designed and built. Secondly, controlalgorithm of motor-wheel-drive...
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ISBN:
(纸本)9783037856949
In this paper, firstly, the function of test-bed of motor-wheel-drive Electric Vehicle has been clarified, the frame structures of test-bed has been designed and built. Secondly, controlalgorithm of motor-wheel-drive Electric Vehicle has been established, including vector control algorithm model, digital PM algorithm model and electronic differential controlalgorithm model, the control system of test-bed has been designed. Lastly, based on the test bed, the controlalgorithm of motor-wheel-drive Electric Vehicle has been verified by bench test. The bench test results show that, the controlalgorithm of motor-wheel-drive Electric Vehicle can achieve straight-ahead control and steering control, which laid the foundation for the future of the real vehicle tests.
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