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In order to improve the harmonic reduction ability of 12-pulse rectifier, an active interphase reactor (AIPR) and corresponding auxiliary circuit are often used to produce circulating current resulting in harmonic reduction. This paper analyzes the load adaptability of 12-pulse rectifier with AIPR. The loads are classified into three types, RL-type load, RC-type load, and RLC-type load. Load currents...
This paper proposes a novel robust method for three-phase rectifier system with high quality for higher power applications. The system consists of two stages: The front stage combines the unique features of a low-kilovoltampere 12-pulse rectifier scheme along with a single-phase pwm rectifier scheme to shape the input current to a sinusoidal waveshape. The single-phase pwm rectifier stage is rated...
In order to reduce the harmonics in input currents effectively, this paper presents a double star rectifier with an auxiliary PWM rectifier at DC side. The volt-ampere rating of auxiliary PWM rectifier is only 10% of output power of the double star rectifier. The auxiliary PWM rectifier injects a particular triangular wave current into the secondary winding of inter-phase transformer to reduce the...
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