Abstract
In this paper, an efficient implementation of the four-step current commutation technique for controlling bidirectional power switches in a Matrix Converter (MC) is proposed. This strategy is based on the enhanced pulse width modulation peripheral included in the C 2000 Delfino 32-bit microcontroller of Texas Instruments. By tuning the algorithmic parameters contained in this module, the four-step commutation process is carried out on the Microcontroller Unit (MCU) without overloading the full complex processor and avoiding the use of additional special hardware such as Field-Programmable Gate Arrays (FPGA) or Complex Programmable Logic Devices (CPLD) when controlling the MC. The algorithm is implemented on the TMS320F28379D MCU and operationally validated on an MC prototype, where the functionality of the proposal is demonstrated.
Highlights
The direct matrix converter is a power electronics topology that efficiently carries out the AC-AC energy conversion without intermediate stages
The four-step commutation strategy along with the Singular Value Decomposition (SVD) modulation technique were implemented in the TMS320F28379D device
This paper proposed a strategy to implement the four-step current commutation technique using the enhanced Pulse Width Modulation (ePWM) peripheral of the TMS320F28379D Microcontroller Unit (MCU) of TI
Summary
The direct matrix converter is a power electronics topology that efficiently carries out the AC-AC energy conversion without intermediate stages. This converter utilizes solid-state power devices and a minimum of energy storage elements, only for filtering purposes; besides, it incorporates beneficial characteristics, viz., bidirectional power flow, compact structure, high-quality low-frequency signals, and a unitary power factor operation, among others [1,2,3]. The BDS is an idealized element with the ability to block voltage and conduct current in both directions.
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