IMPEDANCE-SOURCE INVERTER DESIGN FOR UNINTERUPTED POWER (UPS) APPLICATIONS
Publication Date : 01/02/2013
This paper presents design considerations of a Z-source inverter for a single-phase Uninterruptible power supply (UPS) system. The Z-source inverter system employs a unique LC network in the DC link. By controlling the shoot-through duty cycle, the Z-source can produce any desired output AC voltage, even greater than the battery voltage. The inverter has one switch less than the conventional two stage power conditioner, which leads to reduction of cost. The modulation pattern for the switches is described, and the design recommendations for the Z-source inverter are presented. The design of the inverter was verified by simulation.
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