2005•IEEE Transactions on Power ElectronicsRequires access

Digital Method for Dead-time Compensation of Three-phase Voltage Inverter

Qingbo Hu

Abstract

As for the dead-time effect of three-phase voltage inverter,this paper proposes a real-time calculation method for compensated time.In addition ,the paper analyzed the distortes output voltage and the harmonic current by de ad-time effect in detail.Based on the symmetry of three-phase system,a meth od that only one phase voltage has been compensated is adopted.A digital dead- time compensation method for symmetrical PWM is proposed based on F240DSP in the paper.Experimental results prove that this method has good compensation effect for distorted voltage aroused by dead-time and the nonideal characteristic of switching device.The proposed method has an advantage of control facility and it can be used in dead-time compensation of three-phase voltage inverter.

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Key concepts: Inverter, Dead time, Compensation (psychology), Control theory (sociology), Pulse-width modulation, Voltage, Voltage compensation, Three-phase