Study on high capacity direct frequency converter using modular matrix converter

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Multi-level modular matrix converters for high capacity application such as ac/ ac direct power converters and frequency converters were investigated. The power control method using instantaneous voltage space vectors and the balancing control method of capacitor voltage, which can be applied to multi-level structure composed of single-phase full-bridge cells, were proposed. The methods were verified through numerical simulation and basic operation was confirmed using a 1-kW class experimental circuit.