One of the electronic components that are widely used in the fields of control, power electronics, audio and video electronics are operational amplifiers (Op-Amp). In this study designed a PWM signal generator using basic components Op-Amp. PWM signal is raised is used to control the phase of the inverter output frequency. Having a frequency inverter output can be set normally used to control the speed of electric motors. One of the single-phase inverter applications that are widely used in home appliances stay is the air-conditioning equipment. PWM technique used in the inverter generates output voltage with low harmonics. To strengthen the PWM signal is done by using a driver amplifier circuit does not reverse the amount of reinforcement can be arranged according to voltage full wave bridge inverter driver. Harmonic distortion (% THD) that appears at the inverter output waveform occurs at frequencies greater reference is 1761, but lower output currents of 41A. Therefore, the efficiency of the inverter with great value occurs in the lower reference frequency setting is 74.56%.

Keywords: Op-Amp,PWM unipolar, inverter