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This paper presents a single-stage soft-switching high-frequency link isolated converter for bidirectional motor drive applications. The ‘minimal’ topology is based on the recently proposed soft-switching solid-state transformer (S4T) with a single current-source power conversion stage. This single stage approach reduces total switch rating, provides sinusoidal input and output voltages, and uses...
The four-level Hybrid Clamped Converter (4L-HCC) is emerging as a promising DC/AC converter topology for high-efficiency medium-voltage drives. However, without proper control, the voltage fluctuation of the DC-link capacitors will be excessive, resulting in distorted AC current and stability issue in low frequency operation. In reality, the distorted current makes it impractical for motor drive during...
DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this paper investigates the impact of grid voltage...
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