A Digital Controller for Single-Phase UPS Inverters to Reduce the Output DC Component

HUMBERTO PINHEIRO, FERNANDO BOTTERÓN, JOSÉ R. PINHEIRO, HÉLIO L. HEY AND HILTON A. GRÜNDLING

Aachen - Alemania

Congreso; PESC 2004; 2004

Abstract. — This paper proposes a new two layers digital controller for PWM inverters which significantly reduces the output dc voltage component. It is suitable for low cost PWM inverters where analog-to-digital converters and digital pulse width modulators with small numbers of bits are used. The controller description and design are presented. Experimental results on a 5 kVA set-up validate the theoretical analysis carried out.