rebuild syncrounous motor as induction motor
rebuild syncrounous motor as induction motor
(OP)
Can anyone provide general comments about the challenges that would be involved in rebuilding/rewinding a 4KV syncronous motor to be a 13.2kv 324 rpm 3500 hp induction motor.
I realize that I haven't provided enough info to judge the stator rewind (nameplate data for the sync motor and number of slots etc). But I'm interested in general thoughts. Can a sync motor rotor be easily converted into a squirrel cage induction rotor? Doesn't an induction motor require a smaller air-gap? Has anyone ever heard of this type of conversion being done?
I realize that I haven't provided enough info to judge the stator rewind (nameplate data for the sync motor and number of slots etc). But I'm interested in general thoughts. Can a sync motor rotor be easily converted into a squirrel cage induction rotor? Doesn't an induction motor require a smaller air-gap? Has anyone ever heard of this type of conversion being done?





RE: rebuild syncrounous motor as induction motor
BUT YOU HAVE NOT MENTIONED WHETHER IT IS SALIENT POLE OR NON SALIENT POLE CONSTRUCTION. IT IS QUESTION OF DESIGN ASPECTS OF EXISTIG MOTOR VIS A VIS NEW OUTPUT REQUIRED ALONG WITH OTHER PARAMETERS LIKE TORQUE(NORMAL) AND PULLOUT AND STARTING TORQUE REQUIRED
K.S.RAGHAVAN
K.S.RAGHAVAN
RE: rebuild syncrounous motor as induction motor
RE: rebuild syncrounous motor as induction motor
RE: rebuild syncrounous motor as induction motor
1. There is no need to be discouraged that the industry will not use a high-power low-speed winduction motor. E.g. ships would use plenty of them of your type.
2. I would suggest that you simulate the intended induction motor first by using a suitable software.
3. As an option, the permanent magnet synchronous motor is also a very attractive machine (a "dirty" competition to the squirrel-cage induction motor)
4. There will probably be a need to ground bearings, if you intend to use an AC motor drive to protect bearings from common-mode currents.
5. Consider a double cage rotor.
6. The power rating could be somewhat reduced since the squirrel-cage induction motor may be mechanically more demanding on the stronger stator. This is pending results of the motor simulation.
7. Inquire around, if any motor service/repair firm has done similar conversion to obtain some guidance.