Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. shorehamtv

    10kw DC Motor Control

    Thanks for the reply Don, you are correct, the old contactors are the clapper type with the large air gap and blow out coil, they were actually manufactured by Allen West of Brighton, England. However these had been replaced (not by us) with an a.c. rated type with an air gap of approx 5mm...
  2. shorehamtv

    10kw DC Motor Control

    Thanks for the reply I will try that - as for the manufacturer, the railway is the first electric railway in the UK and was built in 1886!!
  3. shorehamtv

    10kw DC Motor Control

    We would like to to control the above traction motor on a train electronically using IGBT modules if possible, the problem is that the trains run on 125v DC, the initial start current is approx 90 A. The motors are very inductive and have destroyed many good contactors in the past due to...
  4. shorehamtv

    Short circuiting motor leads for emergency stop braking

    Yes you will need a resistor, we have been working on regen / dynamic braking for a railway and it gets very difficult. the resistor has to be very high power 500w ++ depending on motor type, vehicle weight etc. We have been using 1.5 ohm 500w resistors on a 2 tonne 120v train but it seems a bit...

Part and Inventory Search

Back
Top