Application of an Indirect Matrix Converter for Air Conditioners

Abstract

A new inverter technology for packaged air conditioners based on the indirect matrix converter topology was used for practical applications. The selected unidirectional power conversion characteristics of the power circuit were suitable for air conditioning. Furthermore, a new modulation method suitable for microcomputer control was introduced. The evaluations showed that there was an increase in the conversion efficiency and the conformity with the harmonic standard was realized. Product development confirmed the reductions in noise and number of passive components.