No. 1183
	Adjustable-Speed AC Drive Technology Applied Extensively in Transportation and Logistics Sector
	Investigation Committee on Adjustable Speed AC Drive Applications in Transportation and Logistics Sector
	Keyword : Railway, automobile, transporter, shipping, nursing equipment
	Adjustable AC Drives have early been introduced to electric railways, and escalator and elevator systems in a transportation and logistics Sector. In recent years, applications of the adjustable speed AC drives are expanding in automotive industry, especially in hybrid and pure electric vehicles. Controllability, response and energy conversion efficiency can be dramatically improved by electrification or hybridization of mechanical structures and operations of the automobiles. Adjustable speed AC drives are nowadays being used in axulially machines as well as traction drives, which implies that automotive AC drives are necessarily and significantly important components as a trigger of car revolution. Investigation committee of adjustable speed AC drives in transportation and logistics sector was established for the purpose of extracting and technical trends and practical applications of the AC drives from various technical papers and manufacturers' technical reviews, focusing on the transportation and logistics sector. In this report, the committee divided the transportation and logistics applications into five categories, i.e., electric railway, automobile, transporter, shipping, nursing equipment and so forth, and introduced technical knowledge on the basis of the investigational reviews. In conclusion, it has been clarified that conventional energy sources (feeders in railways, mechanical power of combustion engines, oil and air pressure, etc. ) can be hybrid systems with AC drives and that high-efficiency IPMSM, which can deliver both of the reluctance torque and the magnet torque plays an important role.
	©2007. The Institute of Electrical Engineers of Japan