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A novel technique that improves the low-speed performance of a 5-phase induction machine driven by a 2-level inverter using the classic DTC technique is presented. Demagnetization of the stator flux using DTC is investigated when the induction machine runs at lower speeds and a solution is provided to overcome this phenomenon. The proposed technique reduces the demagnetization phenomenon by using...
The objective of this paper is to investigate the operation of three-level 3-phase and 5-phase inverter systems. Particularly, the effect of open-circuit phase failures on the capacitor voltage variation and the impact that the failures have on post-fault phase currents. The paper considers single phase failures in the 3-phase system, and single- and double-phase failures in the 5-phase system. Double-phase...
The aim of this paper is to show that with three-level multi-phase inverter systems, the extra load connections involved in the inversion process reduce the amplitude and increase the frequency of voltage ripple across the DC link capacitors, assuming the same DC capacitance and the same total power output. Symmetrical Regular Sampled Phase Disposition PWM (SRSPDPWM) is employed to generate the PWM...
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