Matrix converter-driven AC motor drives

Abstract

The matrix converter (MC) is an AC-AC power converter topology. The MC topologies are classified into two types: direct MC (DMC) and the indirect MC (IMC) [I]. The IMC topology is composed of a rectifier with six bidirectional switches (BDSs) and a conventional voltage source inverter (VSI). The large energy storage elements are eliminated from the intermediate DC-link in this topology. This chapter mainly focuses on direct torque control (DTC) for MC -driven interior permanent magnet synchronous machine (IPMSM) drive. First of all, it gives a brief overview on the fundamentals of MC followed by the implementation of BDSs for MC. Two current commutation strategies based on input voltage sign and output current direction, respectively, are presented in this chapter. Some other practical issues of MC are also discussed in this chapter, in terms of input filter design and overvoltage protection. Different modulation strategies for MC are briefly reviewed in this chapter. Among these methods, the indirect space vector modulation (SVM) is demonstrated by considering the MC as a two-stage converter, rectifier and inverter stages. The open-loop and closed-loop input power factor (IFF) compensation schemes are presented followed by the DTC schemes for MC drives.