An Effective Carrier-Based Modulation Strategy to Reduce the Switching Losses for Indirect Matrix Converters

Abstract

In this paper, an effective carrier-based modulation (CBM) strategy to reduce the switching losses for indirect matrix converters (IMCs) is presented. The discontinuous pulse width modulation method is applied to decrease the switching numbers in one carrier cycle, and an optimum offset voltage is selected to avoid commutations of the high output phase currents. By decreasing the switching numbers along with avoiding commutation of the high currents, the proposed CBM strategy significantly reduces the switching losses in IMCs. In addition, the proposed CBM strategy is independent of load conditions, such as load power and power factor, and it has good performance in terms of the input/output waveforms. Simulation and experimental results are provided to verify the effectiveness of the proposed CBM strategy.

Simple discontinuous PWM strategies to reduce the switching losses of an indirect matrix converter

“…Because of the clamping, the corresponding modulating signal does not creat switching instants with the carrier wave and therefore remains either ON or OFF for that specific duration. This leads to the reduction of the effective switching frequency and thereby reduction in the switching losses [22]. Consequently, the efficiency of the converter is increased.…”

“…The predictive control method is presented in [19] to reduce the switching frequency of the converter. The modulation methods for reducing the switching losses of the IMC are presented in [20–24]. A modulation strategy developed in [20] reduces the switching losses of the sparse MC in the low modulation range.…”

“…The modulation scheme presented in [21] applies the zero voltage commutation on the output converter stage of the IMC instead of zero current commutation (ZCC) on the input converter to reduce the switching losses. The control strategies based on the discontinuous modulation are explained in [22, 23] to reduce the switching losses. The DPWM scheme of [22] uses the optimum offset voltage to derive the discontinuous modulation signals which avoid the commutations at high output currents.…”

“…The control strategies based on the discontinuous modulation are explained in [22, 23] to reduce the switching losses. The DPWM scheme of [22] uses the optimum offset voltage to derive the discontinuous modulation signals which avoid the commutations at high output currents. In [23], the 60° DPWM scheme is applied to reduce the switching losses of the converter.…”

A New SVM Method to Reduce Common-Mode Voltage of Five-leg Indirect Matrix Converter Fed Open-End Load Drives

“…In comparison with other ac-ac power converters, MCs provide many advantages such as a simple and compact power circuit, sinusoidal input and output current waveforms, a controllable input power factor, and power regeneration capability [5]- [7]. MCs are classified into direct matrix converter (DMC) and indirect matrix converter (IMC) topologies [8], [9]. DMC and IMC have similar input and output performances.…”