三個のサイリスタと一個の共振スイッチから成る三相正弦波整流器

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  • Three-Phase Sinusoidal Rectifier Consisting of Three Thyristors and a Resonant Switch

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Three-phase sinusoidal rectifier consisting of three thyristors and a resonant switch is presented. The switching transition of resonant switch is mainly governed by a series resonance and this allows the thyristors to turn on and off under the zero-current switching condition. Also, the currents flowing through power devices are always limited to the dc current. The experimental prototype employing three inverter-grade thyristors and two insulated-gate bipolar transistors is implemented to investigate the operation. The results confirm that the sinusoidal input currents with a near-unity power factor can be obtained under the pulse-width modulation.

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