Abstract
A high performance single phase three-arms PWM rectifier inverter is presented. A switching control approach for the common arm is proposed such that control of the rectifier arm and inverter arm can be designed independently. Variable structure control (VSC) executed with capacitor current control is developed to design the inverter. For the rectifier design, an instantaneous power feedback controller using filter theory is proposed to enhance the DC voltage regulator to reduce DC voltage fluctuation and minimise input current distortion. A 3 kVA system is implemented to confirm the effectiveness of the proposed approaches.
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