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In industrial environments, motors in Variable Speed Drive (VSD) systems act as primary conduits for the propagation of conducted electromagnetic disturbances, including Differential Mode (DM). The Split-Phase Induction Motor (SPIM) is among the most widely used motors in ASD systems, making the analysis of its impedances and High-Frequency (HF) properties crucial for ensuring Electromagnetic Compatibility (EMC) and mitigating Electromagnetic Interference (EMI). Poor EMC management can result in malfunctions of nearby electronic devices.This article examines the DM current propagation paths in two motor types. The investigation aims to: (i) Identify the HF characteristics of these motors within the critical frequency range for conducted EMI (150 kHz – 30 MHz), (ii) Assess key EMC performance indicators, focusing on the windings of the main and auxiliary phases, and (iii) Compare the EMC performance of different SPIM designs through experimental analysis to select the most suitable motors for critical EMC applications. This approach not only addresses EMC challenges but also optimizes motor performance and ensures regulatory compliance in electrical systems where these motors play a crucial role.

Transposition of the gallbladder to the left side without situs inversus viscerum is rare. These gallbladders are situated under the left lobe of the liver between Segment III and IV or on Segment III to the left of the falciform ligament. This is a report of a 50-year-old woman who was admitted to our department with a history of pain in her right upper abdomen. The physical examination showed tenderness in the right upper quadrant of the abdomen without a Murphy's sign. Abdominal ultrasonography showed gall bladder stones without dilatation of the bile ducts. The patient underwent a laparoscopic cholecystectomy using the French position and four ports positioned as usual. We discovered a left-sided gallbladder located on the left of the round ligament. The gallbladder was excised as usual. Intraoperative cholangiogram showed neither dilatation of the bile ducts nor associated congenital anomalies of the biliary tree. The patient was discharged on the first postoperative day. Because routine preoperative examinations may not detect the anomaly, the latter may take surgeons by surprise during laparoscopy. Awareness of the unpredictable confluence of the cystic duct into the common bile duct and selective use of intraoperative cholangiography both contributed to the safe laparoscopic management of this unusual problem.