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Due to its simplicity and identical input/output voltage polarity, the four-switch buck-boost converter (FSBBC) has found a lot of attentions in series-connected distributed maximum power point tracking (DMPPT) PV system applications. In this paper, the small-signal ac model is derived to analyze the dynamic behavior and stability of an autonomous PV module (APVM) which is composed of a PV module...
A novel stator voltage oriented V/F control method for induction motor is presented in this paper to improve the low speed performance and stability of open-loop system. The control scheme adopts a novel stator resistor voltage drop compensation method to ensure the rated stator flux constant over a wide range of operating speeds. And through deeply research of the instability under light load condition,...
A novel V/F induction motor control system based on stator voltage oriented method is presented. This scheme includes dead time compensation, stator voltage compensation and anti-oscillation regulation, which can greatly improve the V/F systempsilas performance especially low frequency load capability and fast response capability. Different from conventional V/F methods, all the compensation and regulation...
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...
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