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With space vector control, the inductor-neutral voltage is controlled as a vector quantity in the αβ or dq domains. In this example, control is performed in the dq domain. The advantage of dq control is that ac quantities become dc quantities in the dq domain. Thus no tracking error exists when using a PI controller to regulate the ac input current.
The reference ac voltage vector is generated by time-averaging the available switching vectors. Two popular modulation strategies have been implemented in the space vector modulator: an optimal modulation strategy that minimizes the switching losses and a symmetrical modulation strategy that minimizes the THD. A deadtime component has also been included to simulate the effect of switching delay when changing the switch state of a rectifier leg.
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