Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Please play nicely.  No one wants to listen/read a keyboard warriors rants....

Pages: 1 2 [3]  All   Go Down

Author Topic: Had a good nose around this on Saturday...  (Read 2017 times)

0 Members and 1 Guest are viewing this topic.

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34044
  • Git!
    • View Profile
Re: Had a good nose around this on Saturday...
« Reply #30 on: 06 April 2009, 16:24:38 »
Quote
Most Diesel locos ran two stages - you can sometimes feel it change.

Some could only go to full power on weakest field - notably Deltics.

Insufficient field weakening also can ruin a locos high speed performance


Understandable given that in order to increase the speed of a DC machine you need a weaker field.....down side is the armature current goes up and hence you will be limited by the winding resistance and power handling capability (plus the pwoer capability of the alternator)
Logged
Pages: 1 2 [3]  All   Go Up
« previous next »
 

Page created in 0.009 seconds with 16 queries.