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A Novel Hysteresis Direct Torque Control for Matrix Converter Drives
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| Author(s) |
D. Xiao; M. F. Rahman |
| Abstract |
In this paper, the application of classical hysteresis direct torque control (HDTC) to the IPM synchronous machine fed by a matrix converter is investigated and one of the problems associated with this scheme is highlighted. A modified HDTC scheme for matrix converter drives is proposed to solve this problem by applying two switching combinations at each sampling period, which allows significant reduction of input current harmonics without any adverse effect on the
drive performance or increasing the complexity of the system. The fast dynamics is preserved in the proposed scheme by
applying a single current vector in the rectifier stage and thus the maximum line-to-line input voltage is utilized to generate the voltage vector in the inverter stage. A novel input power factor correction strategy is proposed to compensate the effect of input capacitors on the displacement angle by introducing a power-related displacement angle in the duty
cycle calculations. The joint stator flux and rotor speed estimation is implemented with an adaptive sliding mode flux observer in the estimated rotor reference frame to enhance the robustness and reliability of the drive system. The comparisons between the classical and proposed HDTC schemes for matrix converter fed IPMSM machine have been carried out by both simulation and experiments. |
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| Filename: | Unnamed file |
| Filesize: | 1.078 MB |
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| Type |
Members Only |
| Date |
Last modified 2011-11-29 by System |
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