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ABSTRACT:
This paper gives the design and implementation of a single-phase inverter that produces a symmetric ac output voltage of desired magnitude and frequency. A diode bridge rectifier is used to rectify the ac line voltage. Unipolar PWM technique is employed to control the output voltage magnitude and frequency. The digital signal Peripheral Interface Controller (dsPIC) dsPIC30F4013 of Microchip Technology is used for the implementation of the inverter. A DC to Ac voltage converter consists of four bidirectional switches that is used to convert the voltage. Sinusoidal unipolor Pulse Width Modulation is used for triggering the gates of IGBTs. The control circuit consists of the dsPIC controller and it is used to produce required SPWM for triggering the IGBTs.Tthe driver circuit isolates the control circuit from power circuit. The outputs for variable AC voltages are observed in the CRO.
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