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This paper introduces a space vector PWM technique for a direct matrix converter based three-phase open-end winding AC machine drive. With the proposed PWM technique, the following simultaneous capabilities of the open-end winding drive system are achieved: 1) Machine phase voltage up to 1.5 times the input phase voltage in the linear modulation, 2) Controllable grid power factor, and 3) Elimination...
In this paper, a novel wind power generation system is proposed which uses an intermediate high frequency (few kHz) AC link for power conversion. The high frequency AC link is achieved by using a reduced switch-count three-phase power electronic transformer (PET). There are two primary windings and one secondary winding in each phase of the PET. The primary windings are coupled in exact phase opposition...
In this paper, a new space vector PWM strategy for a matrix converter based open-end winding drive is presented. This modulation strategy enhances the capability of drive system to supply reactive power to the grid while eliminating switching common-mode voltage at the machine terminals. The enhanced reactive power support is possible due to the following new features of the proposed PWM strategy:...
Switching common-mode voltages generated by conventional pulse-width modulated inverters are known to cause bearing currents in ac machines. These undesirable currents may result in bearing damage. A direct-link drive for open-end winding ac machines has recently been proposed. Some advantages of the drive include: 1) common-mode voltage suppression, 2) no storage elements, and 3) ability to achieve...
Conventional pulse-width modulated inverters cause switching of common-mode voltage at the terminals of ac machines, which result in undesirable bearing currents and damage to the bearing. This paper presents a two-level indirect-matrix converter-based direct-link drive for three-phase open-end winding ac machines. The proposed topology suppresses common-mode voltage, outputs up to 1.5 times the peak...
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