The development of a new three-phase bipolar inductive power transfer system that provides power across the entire width of a roadway surface for automatic guided vehicles and people mover systems is described. A prototype system was constructed to verify the feasibility of the design for a number of moving loads (toy cars). Here, 40 A/phase is supplied at 38.4 kHz to a 13-m-long test track. Flat pickups are used on the underside of each vehicle to couple power from the track to the vehicle. Finite element modeling software was used to design the geometrical position of the track cables and to predict the power output. This design resulted in a considerably wider power delivery zone than possible using a single-phase track layout and has been experimentally verified. Mutual coupling effects between the various track phases require additional compensation to be added to ensure balanced three-phase currents.Index Terms-Electromagnetic coupling, electromagnetic induction, energy conversion, road vehicle electric propulsion.

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Adjuvants to compression are sought for treating venous ulceration. There is animal, observational and trial evidence that suggests statins increase venous ulcer healing. The objective of this study was to conduct secondary analyses investigating the association of statin use with healing in three randomised trials that recruited people with venous ulceration. The difference in healing rates was modest but higher in the statins group. Crude analyses found no significant difference between the groups, but when adjusted for the trial effect and potential confounders (age, diabetes, first ever ulcer, ulcer area and ulcer duration), significantly more participants healed among those taking statins. The analyses were robust to method of analysis (fixed effects or random effects models). A definitive trial is required to evaluate the effect of statins versus placebo on venous ulcer healing, but until then patients needing to take statins seem unlikely to be disadvantaged by this treatment.