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In order to evaluate and improve the electromagnetic compatibility (EMC) of a variable frequency air conditioner, a time-domain methodology is advanced to analyze the conducted electromagnetic interference (EMI) caused by the three phase inverter-motor system in an actual air conditioner. The parasitic parameters of the EMI propagation path in the air conditioner are extracted using impedance measurement...
Voltage sags have become a major power quality issue encountered by industries in recent years. The voltage-sag compensator, based on a transformer-coupled series-connected voltage-source inverter, is among the most cost-effective solutions to protect sensitive loads. Many voltage-sag compensators adopt open-loop control strategies to increase the response speed for the sag compensation. However,...
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