The Design and Construction of A 2kVA Inverter with Automatic Timing Capability

This work develops a 2KVA inverter with timing capability for load supply. The development of timing-capable inverter draws from a DC input which could be a solar/ deep cycle battery source. Public power supply could be used to charge the battery. The inverter used the pulse width modulation (PWM) approach and used the SG3524N IC as the Pulse Width Modulator (PWM). Dual channel MOSFETs are supplied current of 10ms duration every 20ms and are used to alternately supply the primary windings of a step up transformer thereby producing an AC in the secondary of the transformer. A step-down transformer, bridge rectifier, and the pulse width modulator were used to provide voltage regulation of the output supply to the load. A keypad, a GDM1602A LCD screen and a PIC16F84A microcontroller were employed in the timing control of the voltage from the output of the inverter. Relays were employed in switching the voltage to the output based on the timing algorithm from the microcontroller. A prototype 2kVA inverter with timing was designed and implemented with a satisfactory output and suitable timing control.