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In this paper, a new compensation strategy for receiving clean power is proposed with a conventional 18-pulse AC/DC rectifier scheme. In the proposed strategy, the compensation currents are injected at the dc side in front of the inter-phase transformer. The injected currents generated by a three-phase current-controlled inverter effectively improve the total harmonic distortion (THD) of the ac main...
A new medium voltage drive has been developed based on the active neutral-point clamped 5-level (ANPC-5L) topology. In the last decade three-level neutral-point clamped (NPC) converters have become the industry standard in MV Drives. This configuration has proved very successful for applications where high power and high performance requirements necessitated the use of inverter grade motors and the...
This paper describes a three-phase high power factor rectifier for an electrolytic capacitor-less inverter based on the current injection scheme. The rectifier injects the machine side zero sequence current into the grid side through three bi-directional switches. This paper also introduces the modified circuit topology which is suitable for an electrolytic capacitor-less inverter. A bulky dc or ac...
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