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The V/F controlled induction motor driver systems always suffer from middle frequency oscillations under light load conditions. Many methods were sponsored but always complex and parameters dependent. This paper present one simple and reliable method which can improve the systemspsila stability: First, one efficient dead-time compensating method was present, which can reduce the distortion of phase current. Then, one voltage adjusting method based on reactive current compensation was proposed. This method is parameter independent and the experiment results demonstrate it can damps the oscillations of the drive system effectively.
Date of Conference: 17-20 Oct. 2008