1. New Peak DC-Link Voltage Control Strategy of Z-Source Inverters.
- Author
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Li Linlin, Tang Yu, Xie Shaojun, and Wei Jukui
- Subjects
- *
VOLTAGE regulators , *ELECTRIC inverters , *INVERSION (Geophysics) , *ELECTRIC circuits , *STEADY-state flow - Abstract
A new direct peak DC-link voltage control strategy of Z-source inverter (ZSI) is proposed. For ZSI, the peak DC-link voltage is the actual voltage fed to the inversion stage. Controlling the peak DC-link voltage at the constant level can effectively decrease the voltage stress and simplify the design process of the inversion stage. A direct peak DC-link voltage detection method is developed with a simple sampling circuit, and then controlled directly. Therefore, the constant peak DC-link voltage can be achieved in different input and load conditions. The peak AC output is calculated in real-time by sampling the AC phase voltage, and it is controlled to the desired value without steady-state error. With the proposed direct peak DC-link voltage control and the peak AC output control, both the peak DC-link voltage and AC output are controlled to a desired level under different input and load conditions. Experimental results demonstrate the feasibility of the proposed control strategy. [ABSTRACT FROM AUTHOR]
- Published
- 2014