Induction motors -400 hertz
Induction motors -400 hertz
(OP)
I have been tasked with designing a 400 hertz induction motor. I am familiar with 60 or 50 hertz designs. This is the first 400 hertz. Reactances will be higher by the ratio of the frequencies.
The rotor bars I believe will need to be close to the rotor OD.
Anybody know any of the differences? Calculations?
The rotor bars I believe will need to be close to the rotor OD.
Anybody know any of the differences? Calculations?





RE: Induction motors -400 hertz
http://speedcad.com/speed_both.htm
RE: Induction motors -400 hertz
http://efunda.globalspec.com/SpecSearch/SearchForm/Motion_Controls/Motors/AC_Motors?deframe=1
http://electronic-contract-manufacturing.globalspec.com/directory/Electrical_Electronic_Manufacturing_Services/Custom_Motor_Generator_Services?deframe=1
etc. for more info
RE: Induction motors -400 hertz
RE: Induction motors -400 hertz
You need to hit the books.
As you mentioned all inductive and capacitive reactance’s are increased with frequency. The skin effect on conductors is more critical (keep an eye on strand sizes). The rotor bars will have increased deep reactance. The core losses increase, so very thin laminations of high grade silicon steel are required. For calculations you need a computer aided program, the few commercially available are quite expensive.
RE: Induction motors -400 hertz
Inductive reactance Xl = 2*Pi*f*L increases with frequency.
Capacitive reactance Xc = 1/(2*pi*f*C) decreases with frequency.
RE: Induction motors -400 hertz