American AI is usually American Airlines, and usually appears because of a baggage fee paid at the airport, or a purchase made during a flight. posted 09/11/2012 Helpful (4)
Electric motors are in general, a lot more efficient that internal combustion engines. An average combustion engine has about 18â20%. A formula one engine, has about 50% of an efficiency.
Dc motors are increasing in popularity due to their performance advantages over ac motors for applications ranging from high-speed automation to electric motorbikes. Jon Severn reports on a selection of recent developments in dc motors and drives. Three-phase ac induction motors are the most common type of motor used in industrial application, due largely to their simple design, low purchase cost, reliability and broad choice of sizes and specifications.