1. IEEJ. Handbook of Electrical Technologies, The institute of Electrical Engineers of Japan (IEEJ): 2000; 1811–1813.
2. The Energy Saving Center. Japan “Guide for Energy Saving for Industrial Factory” A sample of proposal for energy saving at Field Investigation, 2003.
3. Catalogue identification number is IKW026D-E07-5, revised on March 2006. ED MOTOR(Eco-Drive Motor) is the Economical & Ecological Drive System that realizes ultra-high efficiency and down sizing, TOYODENKI SEIZO K.K. Catalogue identification number L(MEI)06043-C(0608)MDOC issued on August 2006, FREQROL-FP Series, Mitsubishi Electric Corporation.