A space vector modulation method for dual three-level inverter system zero sequence voltage elimination
A three-level inverter, space vector modulation technology, applied in electrical components, output power conversion devices, conversion of AC power input to DC power output, etc., can solve the problem of high zero-sequence voltage amplitude and increase the cost of system equipment , It is difficult to realize the four-quadrant operation of the motor, etc.
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[0059] The following will be combined with figure 1 To further illustrate the implementation of the present invention, a new space vector modulation method for effectively eliminating the zero-sequence voltage of the dual three-level inverter system described in this implementation is aimed at the 60° space vector decoupling model , the method is as follows: first, the reference voltage vector is decomposed into two equivalent reference voltage vectors with the same size and 60° direction to each other, and the magnitude of the two equivalent reference voltage vectors is equal to the magnitude of the reference voltage vector , and are generated separately by two diode-clamped three-level inverters, and then the two-level components corresponding to the two equivalent reference voltage vectors are converted into corresponding three-phase bridge arms by using a unified fast algorithm The virtual switching time of the virtual switch and the corresponding effective action time ar...
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