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Presently work exists within the IEEE to develop a test standard for Permanent Magnet AC (PMAC) machines that includes a specification on the quality of current supplied to the machine. The research presented in this paper offers a comparison on the quality of current provided to the machine for three control strategies; Space Vector, PI and Bang-Bang. The tests conducted were of an “on the fly” nature...
Utilisation of wind energy to generate electricity has attracted considerable attention worldwide, and is rapidly-growing. The integration of large wind farms with high voltage direct current (HVDC) transmission network could be one of the preferred options for supplying bulk power over a long distance. Since HVDC rectifier stations with constant current control may introduce negative damping on the...
Non-sinusoidal back electromagnetic forces cause torque ripple in permanent magnet synchronous motors. These harmonics should be reduced by means of an appropriate current control to improve performance. Good results have been obtained with linear regulators such as repetitive controllers in synchronous reference frame (SRF) and resonant controllers in stationary frame. Repetitive controllers present...
This paper proposes a new voltage control technique for IPMSM drives to extend DC-link voltage utilization for flux weakening operation. The presented method does not require look-up-table and motor parameter for flux weakening operation. The difference between the switching period and summation of active switching times for PWM control of inverter is used to modify the d-axis current reference under...
This paper proposes a new fine servo system based on a new over-modulation method with priority given to d-axis voltage for interior permanent magnet synchronous motor (IPMSM). The proposed over-modulation method gives priority to the d-axis voltage to avoid the d-axis voltage saturation, and increases the amplitude of inverter output voltage to achieve the quick torque and speed responses under voltage...
This paper presents a closed loop vector control for an interior permanent magnet synchronous motor (IPMSM) drive incorporating a neuro-fuzzy controller (NFC) and a fuzzy logic controller (FLC). The NFC serves as the speed controller of the drive. It is designed so as to generate the appropriate command q-axis current and ensure dynamic speed control. The back-propagation technique is used for the...
This paper presents a second order sliding mode current controller for the switched reluctance machine (SRM). This strategy is first analysed theoretically, then tested by simulation and on an experimental test bench. Dynamic, current ripples and robustness of this controller are discussed.
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