Previous in Forum: RF Randomization of Lighting   Next in Forum: Merz price protection in Power transformer
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
7 comments
Rate Comments: Nested
Wilsonlt
Participant

Join Date: Jul 2007
Posts: 4

Resistance Starters

07/25/2007 5:55 AM

What three types of resistance starters are there, for the use with slip-ring induction motors?

I am aware of the Metal and Liquid resistances but what type would the third be?

Leon
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
coconutpete
Power-User
Hobbies - Fishing - New Member

Join Date: Feb 2007
Location: Suva Fiji Islands
Posts: 229
Good Answers: 3
#1

Re: Resistance Starters

07/25/2007 11:46 PM

Look it up read some text books google it etc. etc. You learn a lot more by doing your own homework than by getting other people to do it for you

__________________
 "Multa ferunt anni venientes commoda secum, Multa recedente adimiunt". (The years as they come bring many agreeable things with them; As they go they take many away).
Register to Reply
Wilsonlt
Participant

Join Date: Jul 2007
Posts: 4
#3
In reply to #1

Re: Resistance Starters

07/26/2007 2:16 AM

Thanks for the educated answer, have a windy day in the remote spot.
Register to Reply
perry
Power-User

Join Date: Dec 2006
Posts: 346
Good Answers: 6
#2

Re: Resistance Starters

07/26/2007 12:35 AM

short the rings together & buy a variable frequency drive, you will have a better system perry
Register to Reply
Wilsonlt
Participant

Join Date: Jul 2007
Posts: 4
#6
In reply to #2

Re: Resistance Starters

07/26/2007 2:44 PM

Thanks
Register to Reply
nesubra
Guru

Join Date: Nov 2006
Posts: 729
Good Answers: 2
#7
In reply to #2

Re: Resistance Starters

07/27/2007 1:30 PM

There is no use if u short the slip rings and start as a cage rotor.We may as well use a cage motor which is cheaper and sturdier and relatively maintenance free.Slip ring motors are used in certain applications that entail it.

__________________
 To avoid crticism do nothing,say nothing,be nothing
Register to Reply
Anonymous Poster
#4

Re: Resistance Starters

07/26/2007 2:17 PM

I agree with perry... slip ring (wound rotor) motors are not very efficient at slow speeds. Since we now have VFD's, this is the way to go.

PS: the third method of limiting slip ring (rotor) current would be XL, (Inductive Reactance) (a coil - actually 3 coils for 3 phase)
Register to Reply
Wilsonlt
Participant

Join Date: Jul 2007
Posts: 4
#5
In reply to #4

Re: Resistance Starters

07/26/2007 2:42 PM

Thanks
Register to Reply
Register to Reply
Have a Different Question?
7 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); coconutpete (1); nesubra (1); perry (1); Wilsonlt (3)

Previous in Forum: RF Randomization of Lighting   Next in Forum: Merz price protection in Power transformer

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (136 right now)
Show Members
Advertisement