-
Membership
Career development & professional registration-
Explore this section
Members and registered users
Enhance your career
Professional registration recognises your competence, commitment, skills and experience.
The IET provides guidance and support to enable members to undertake planned and structured Initial Professional Development (IPD) and Continuing Professional Development (CPD).
Professional development courses designed to help individuals and organisations reach and stay at the leading edge of engineering and technology.
The IET Awards reward and celebrate individual excellence, innovation and ambition (engineering scholarships).
-
-
Resources
Library, archives, bookshop, publications & factfiles-
Explore this section
E&T Jobs
Engineering & Technology Jobs
Search today for your next engineering role on Engineering & Technology Jobs, the job board hosted by the IET.
Standards
IET Standards
IET Standards publishes authoritative standards, codes of practice and guidance materials for professional engineers and other key stakeholders, using its expertise to achieve consensus on best practice in emerging and established technology fields. ISL also works with expert partners to deliver training based on its publications.
Publications
Buses, Bankers and the Beer of Revenge
From Greek computers to aircraft carriers made of ice - a collection of 50 of the best stories from Justin Pollard’s Eccentric Engineer column in E&T magazine.
Engineering & Technology magazine
E&T is the leading monthly magazine for all engineering professionals. Its award winning content is available in print, online and on iPad.
-
-
Get Involved
Communities, sectors, volunteers & discussion forums-
Explore this section
MyCommunity
Shape your community. Shape your world.
MyCommunity, the IET's professional network and collaboration platform, enabling you to connect, interact and exchange knowledge with your peers.
Volunteering
Interact with the IET and raise your professional profile
Volunteering can enhance your career development, is a personally rewarding experience and also benefits your Community.
-
-
Events
Conferences, seminars, courses, lectures & visits-
Explore this section
Highlighted events
20 May 2013 | IET London: Savoy Place, UK
11 - 14 June 2013 | Wyboston Lakes Hotel, Bedfordshire, UK
14 June 2013 | IET London: Savoy Place, UK
8 - 10 April 2014 | Midland Hotel, Manchester, UK
-
-
Policy & Media
Thought leadership, media centre & public affairs-
Explore this section
Media centre
IET corporate news and activities, plus comment and reaction on engineering and technology issues.
Read what the media is saying about the IET and our activities.
We can provide independent experts to talk to the media on a range of engineering and technology related subjects.
Advice and support to IET members on promoting IET activities via the media and social media.
Policy
Key topics offer summaries of the IET’s positions on many of the most important policy topics.
The IET represents the views of its members on a wide range of professional and technological issues.
Offering unbiased, independent, evidence based policy advice.
The engineering profession speaking with one voice on key issues relating to engineering.
-
 |
IET |
 |
 |  |
|
search :
help :
home
|
||
|
Latest News:
|
|
|
|
Topic Title: Eddy Current Brakes Topic Summary: Created On: 30 September 2008 08:21 PM Status: Post and Reply |
Linear : Threading : Single : Branch |
 Search Topic |
Topic Tools
|
 30 September 2008 08:21 PM
|
|
|
Eddy Current brakes are used in the oil industry on heavy duty hoisting equipment. The brake is mechanically connected to the shaft on the end of the hoisting drum.
The brake units each have two circular magnets and each magnet has two electrical coils. A solid steel continous "H" section rotor revolves around the periphery of the magnets I wish to know the % loss of braking power (retardation) if one coil fails. Will it be a pro rata 25% loss of braking power, alternatively will it be more or less than 25% Note: the brake is of very heavy construction with a internally water cooled rotor in a solid steel casing |
|
|
|
|
|
31 March 2009 07:57 AM
|
|
|
Hi,
I'm a newbie to this iet. As you are talking about brake , i would like to know about the rotors, as I have some poor knowledge on those. I hope somebody would help me on this. Thanks in advance. ------------------------- Regards, Mortonrig Link removed |
|
|
|
|
|
11 May 2009 05:53 AM
|
|
|
Sorry for the late reply, I've just seen the post.
Don't know if you welcome speculations or uncertain answers. I would say you will get a 25% pro rata reduction in braking power if the braking circuit is a simple 100% ON type. However, if there is any speed feedback into a closed loop, you might find that the electromagnets are pulse controlled (PWM) and the controlling (rheostatic damping) circuitry just compensates for the loss of one coil by increasing the mark-space ratio of the pulses. |
|
|
|
|
|
06 October 2009 02:25 PM
|
|
|
Not sure if this is helpful but you can find the details of the patent application for the Baylor Elmagco brae which is the one most commonly used for offshore applications.
http://www.patentstorm.us/pate...26236/description.html |
|
|
|
|
|
IET
» Transport engineering
»
Eddy Current Brakes
|
Topic Tools |
See Also:
|
|
| Technical discussion forums |
|
| · | Wiring and the regulations |
| · | Built environment |
| · | Design and production engineering |
| · | Control and automation |
| · | Communications engineering |
| · | Information technology |
| · | Energy |
| · | Transport engineering |
| · | Airfield engineering |
| · | Electronic engineering |
| · | Management in engineering |
| · | Consumer technology |
| · | Other and general engineering discussions |
| Professional and career discussion forums |
|
| · | Feedback and questions |
| · | CEng, IEng, EngTech and other professional registration matters |
| · | Savoy Place Virtual Club |
| · | Student and apprentice discussion forum |
| · | Young Professionals Community |
| Archived categories |
FuseTalk Standard Edition v3.2 - © 1999-2013 FuseTalk Inc. All rights reserved.
