Three Carrier PWM Control of Improved Z-Source Inverter

Abstract:

A kind of three carrier PWM control method is put forward for improved Z-source inverter. The switches are controlled by comparing three carrier and three reference waves. The shoot-through zero state are injected in the time when traditional zero vector worked. The voltage gain is determined by the dc offset voltage of carrier wave when the modulation index is constant. Boost factor is made independent of the modulation index. And the switching loss is reduced. The voltage stress on the capacitances and switches are analyzed in detail. Simulation results show that this method possesses better control performance.

• Periodical: Applied Mechanics and Materials (Volumes 397-400)
• Pages: 1800-1803
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.397-400.1800
• Online since: September 2013
• Authors: Hai Gang Zhang, Wei Wei An, Xiao Bin Li, Jun Jun Li
• Keywords: PWM, Ternate Carrier, Voltage Stress, Z-Source Inverter

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