Research on Modulation Technology for Novel Single-Phase Inverter Source

A novel single-phase inverter source based on advanced modulation wave reconstruction pulse width modulation (AMWR-PWM) technology is proposed. The causes of the harmonic production and the impact of balanced and unbalanced systems on the characteristics of the inverter source are analyzed in detail. As a result, a novel method of harmonic elimination of the PWM is presented. The novel PWM technique simplifies the structure of the inverter mains and greatly decreases or even removes the DC filter capacitor used in the traditional PWM technique of inverters for eliminating the harmonics. The novel single-phase inverter source has a lot of satisfactory characteristics such as small aberrance of ac side´s current, high quality output voltage of inverter and quick response etc. The performance of this inverter source using AMWR-SPWM technique is compared with traditional inverter source by simulation, and the results show that the theoretical analysis is correct, and It is obvious that the new inverter source and novel PWM technology with satisfactory characteristic will be wide used in the foreseeable future.