Modulation and control strategy for a single-phase to three-phase indirect matrix converter drives

This paper proposes modulation and control strategy for a single-phase to three-phase (1p-3p) indirect matrix converter (IMC) drives. The 1p-3p IMC is composed of a singlephase current source rectifier (1p-CSR) and a three-phase voltage source inverter (3p-VSI). The 3p-VSI is operated with modulation strategy similar to that of a common inverter. The 1p-CSR must be operated with a restriction where a closed loop of that must be guaranteed consistently because the 1p-3p IMC does not have DC-link energy storage elements such as inductors and capacitors. Therefore, the 1p-CSR is necessary to additional methods regarding a circuit, modulation strategy, and control strategy. In this paper, the modulation and control strategy for the 1p-3p IMC drives with additional filter capacitor are proposed. The effectiveness of the proposed modulation and control strategy is verified by simulation results.

I. Introduction

AC/AC power conversion systems using various topology such as back-to-back (BTB) converter, direct matrix converter (DMC), and indirect matrix converter (IMC) are used for numerous applications, which are adjustable-speed motor drives, power transmission, and renewable energy conversion system [1]–[4]. The BTB converter is composed of a rectifier stage, an inverter stage, and DC-link energy storage elements such as capacitors and inductors. It is a common AC/AC power conversion system with DC-link energy storage elements and it is performed as AC-DC-AC indirect power conversion. However, the BTB converter has disadvantages such as short lifetime, large volume, and weightiness because of the DC-link energy storage elements. Unlike the BTB converter, the DMC and the IMC are composed of all-semiconductors without DC-link energy storage elements. They are performed as AC-AC direct power conversion.