Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
Valentin Angelovski
11/05/05 23:25
Read: 604 times
Melbourne
Australia


 
#103330 - Re: ac drive
Responding to: Andy Neil's previous message
Shashikant Sharma said:
Dear all engineers,
how to select ac drive.
how to interface speed sensor to ac drive.
please also explain me the effect of higher frequency say 120 hz.to 50 hz rated motor.
thanks,
shashikant.



Hi shashikant,

Like Andy said, it depends on the specific appliaction ie: what power/speed rating? optical/hall-effect sensor feedback etc.

In regards to your last question, basically, it depends on your motor inductance, rotor magnetic properties, in addition the final mechanical speed rating of the rotor bearings etc.

While most ac motors can be run above base frequency (and hence speed), you cannot go very far over double the base because of either mechanical, electrical and/or thermal issues under normal circumstances .

Are you using an 8051 micro to control an ac motor?

Valentin



List of 14 messages in thread
TopicAuthorDate
ac drive      Shashikant Sharma      11/05/05 01:39      
   How to select      Andy Neil      11/05/05 07:32      
   Speed sensor      Andy Neil      11/05/05 07:36      
      Re: ac drive      Valentin Angelovski      11/05/05 23:25      
   AC drives (inverters)      Erik Malund      11/07/05 07:03      
       AC Drive- Can you help?      Anil Gupta      11/30/05 03:49      
         ABB, Siemens      Andy Neil      11/30/05 04:25      
         No, I have not been involved in inverter      Erik Malund      11/30/05 05:58      
            When & which make?      Anil Gupta      11/30/05 23:13      
               I recall      Erik Malund      12/01/05 06:38      
   most likely it will blow up      Erik Malund      11/30/05 09:24      
      Not in every case      Valentin Angelovski      11/30/05 16:26      
         It is a common misconception that you ta      Erik Malund      12/01/05 06:42      
            motor drives      Terry Lingle      12/01/05 09:20      

Back to Subject List