RANCANG BANGUN AVR (AUTO VOLTAGE GENERATOR ) MENGGUNAKAN CHOPPER TIPE BOOST CONVERTER PADA GENERATOR SATU FASA 3 KVA

Abstract

Problems in a power plant is to maintain the output of a generator to remain stable at standard conditions, taking into account the prime movers rpm. Sattu one solution is to use the AVR is working to adjust the excitation current and voltage on eksiter (amplifier field) generator and utilizing a chopper type boost converter which serves as penaik voltage to regulate the generator excitation current on strengthening. Boost converter consists of an inductor, diode fast (fast recovery) and kapasior as the filter. To obtain the required excitation voltage sensor is required as a generator output readings, which results from reading this will be translated to the ADC through a microcontroller Atmega 8. The ADC will be converted to pwm (pulse-width-modulation) which will be used as a voltage regulator in the boost converter function. Penyaklaran pwm ignition is needed to raise this tegangan.Penyaklaran using mosfet, where pwm microcontroller 5 volts from 12 volts to be raised mennjadi. That requires a buffer circuit with a volt circuit and tomtempol optocupler as input switching mosfet. Magnitude dirancaang duty cycle of 45% for the voltage drop at 3 KVA generator to get the output voltage of 220 volts (stable). Calculation of average voltage regulation originally was 16:28% without AVR while using the AVR voltage regulation mean to be 0.26%.