@article{oai:kanazawa-u.repo.nii.ac.jp:00009488,
 author = {Yamada, Sotoshi and Takeuchi, A. and Sudani, T. and Bessho, Kazuo},
 issue = {5},
 journal = {IEEE Transactions on Maggetics},
 month = {Sep},
 note = {The new electric motor is the magnetic combination of a magnetic frequency multiplier and a AC motor which share the common magnetic yoke. The motor operates near the synchronous speed (10,800 rpm) by applied the single-phase commercial source at 60 Hz. The new machine is called “high-speed hybrid AC motor” because the combination of a motor and a frequency converter. This paper describes the structure and the operating characteristics of the new motor.},
 pages = {967--969},
 title = {High-speed ac motor including the function of a magnetic frequency tripler},
 volume = {22},
 year = {1986}
}