Previous in Forum: Harmonics   Next in Forum: Why A Capacitor Is Used In Series of an Ordinary Fan
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
5 comments
Rate Comments: Nested
tauqeer
Active Contributor

Join Date: Jan 2008
Posts: 11

Flux Production In The Relay By DC Voltage

01/02/2008 5:29 AM

how flux produces in the energising coil of the relay by a dc voltage where AS ''flux produces in a coil by AC''

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: flux production in the relay by dc voltage

01/02/2008 5:32 AM

Magnetic flux is proportional to current, and to the number of turns of wire in the coil.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Bill
Guru
Technical Fields - Architecture - New Member Popular Science - Weaponology - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Electrical Engineering - New Member Engineering Fields - Electromechanical Engineering - New Member Hobbies - Fishing - New Member Hobbies - Target Shooting - New Member Hobbies - Hunting - New Member

Join Date: Dec 2005
Location: Clemson, South Carolina
Posts: 1722
Good Answers: 18
#2

Re: Flux Production In The Relay By DC Voltage

01/02/2008 9:16 AM

Magnetic flux is in one direction only in a DC coil. That is, North or South, in common terms, depending upon which direction the current flows in the coil.

In AC coils, the flux changes with the alternating current. That is, if you have 50 Hz power, the flux changes from one direction to the other (N and S) 50 times per second.

__________________
 We have met the enemy and he is us . . . Walt Kelly
Register to Reply
tauqeer
Active Contributor

Join Date: Jan 2008
Posts: 11
#3
In reply to #2

Re: Flux Production In The Relay By DC Voltage

01/02/2008 11:36 PM

flux production in a coil is due to the varing current but in the case of dc relay why dc produces magnetic field in the relay coil

Register to Reply
Bill
Guru
Technical Fields - Architecture - New Member Popular Science - Weaponology - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Electrical Engineering - New Member Engineering Fields - Electromechanical Engineering - New Member Hobbies - Fishing - New Member Hobbies - Target Shooting - New Member Hobbies - Hunting - New Member

Join Date: Dec 2005
Location: Clemson, South Carolina
Posts: 1722
Good Answers: 18
#4
In reply to #3

Re: Flux Production In The Relay By DC Voltage

01/03/2008 9:12 AM

I think the problem lies with your definition of "flux." Flux, in the general sense, means "flowing." Magnetic flux, on the other hand, is a quantity. Magnetic flux density is a measure of magnetic field strength.

__________________
 We have met the enemy and he is us . . . Walt Kelly
Register to Reply
TVP45
Guru

Join Date: Jul 2007
Posts: 4448
Good Answers: 143
#5
In reply to #3

Re: Flux Production In The Relay By DC Voltage

01/03/2008 9:30 AM

The magnetic field in an ac coil is not due to varying current but just current. A steady current produces a steady field; a varying current produces a varying field.

Look at Hyperphysics and go to Electricity and Magnetism.

__________________
 "Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
Register to Reply
Register to Reply
Have a Different Question?
5 comments
Copy to Clipboard

Users who posted comments:

Bill (2); PWSlack (1); tauqeer (1); TVP45 (1)

Previous in Forum: Harmonics   Next in Forum: Why A Capacitor Is Used In Series of an Ordinary Fan

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 (77 right now)
Show Members
Advertisement