Reducing emissions from an AC-DC-AC converter to improve Power Delivery Network behavior

The paper deals with specific matters concerning the electromagnetic disturbances introduced in an a.c. network by a static converter. A short description of the electronic converter AC-DC-AC of 1,500 W submitted to analysis is provided. The introduced disturbances are determined and analyzed considering the standard EN 50121-3-2. The disturbances transmitted through conducted emissions along the 1st phase and radiated emissions in the absence of anti-disturbances measures are represented. The conducted emissions for input and output ports are analyzed. Due to the influence of the PDN (Power Delivery Network), anti-disturbance measures were re-designed, details and discussions considering them being provided. Data concerning on the manufacturing of the new equipment including anti-disturbance measures are given. The equipment was tested considering the anti-disturbance measures and results are presented. They are complaint with EN 50121-3-2 Standard and with customer´s requests.