Quasi Z source three-level T-type inverter

The utility model relates to a quasi Z source three-level T-type inverter; a topology has boost features same with that of a quasi Z source network three-level midpoint clamping (NPC) inverter, and uses less switch devices, and is high in efficiency; compared with a three-level T-type inverter, the topology of the utility model can realize boost/buck functions, and allows direction connection of an upper bridge arm and a lower bridge arm, thus obviously improving reliability, removing dead zone time, and preventing waveform distortion; compared with a Z source three-level diode clamping inverter, the topology is constant in input end current and small in ripples, and an input end needs not to be connected in parallel with a large capacitance bar set; compared with a quasi Z source two-level inverter, the output voltage has a midpoint potential, so a sum high frequency harmonic wave is small, a needed filter is also small, a switch frequency can be reduced, and switch loss can be relative small; the quasi Z source three-level T-type inverter employs a SVPWM method to control the inverter, the same method can be used to reduce switching times, thus reducing switch loss, and reducing output voltage harmonic wave content.