Re: Auxiliary Braking Unit or Brake Slug
Author: SP5103
Date: 02-10-2019 - 15:48

I thought Milwaukee Road used rotary convertors? I can see where adding power back into the 3,000 volt DC overhead would help a train drawing power in the same circuit, but to "make the meter run backwards" into the AC transmission line would require it to be reconverted from DC back to AC of the right phase and voltage.

I'm sure today's modern static convertors or high voltage AC overheads could handle regenerative braking easier. But how well is the commercial grid going to handle the wild variations from acceleration of HSP or a sudden surge of regenerative braking that suddenly drops out?

I won't argue that there is a huge advantage to regenerative braking, as I would much rather use that power than simply throw it away as heat. But - regenerative braking on modern freight trains in North America (assuming you electrified) has the same exact considerations as dynamic braking. You still have the 250,000 pound buff limit, and it is not a fail safe system.

Wonder what Caltrain is setting up to do?



Subject Written By Date/Time (PST)
  Auxiliary Braking Unit or Brake Slug SteveT 02-09-2019 - 16:03
  Re: Auxiliary Braking Unit or Brake Slug Ed Workman 02-09-2019 - 17:08
  Re: Auxiliary Braking Unit or Brake Slug OPRRMS 02-09-2019 - 19:01
  Re: Auxiliary Braking Unit or Brake Slug OPRRMS 02-09-2019 - 18:57
  Re: Auxiliary Braking Unit or Brake Slug Berg 02-09-2019 - 20:19
  Re: Auxiliary Braking, CN air repeater car Berg 02-09-2019 - 20:28
  Re: Auxiliary Braking, SP air repeater car berg 02-09-2019 - 20:30
  Re: Auxiliary Braking, SP air repeater car OPRRMS 02-09-2019 - 21:12
  Re: Auxiliary Braking, DPU is better Berg 02-09-2019 - 21:31
  Re: Auxiliary Braking, DPU is better SP5103 02-09-2019 - 23:02
  Re: Auxiliary Braking, DPU is better SteveT 02-10-2019 - 01:19
  Re: Auxiliary Braking, DPU is better diffrent critter 02-10-2019 - 10:50
  Re: Auxiliary Braking, DPU is better Max Wyss 02-10-2019 - 12:03
  Re: Auxiliary Braking, DPU is better ex-BN 02-10-2019 - 13:58
  Re: Auxiliary Braking, DPU is better SP5103 02-10-2019 - 15:39
  Re: Auxiliary Braking, DPU is better ex-BN 02-10-2019 - 16:35
  Re: Auxiliary Braking, DPU is better SP5103 02-11-2019 - 11:23
  Re: Auxiliary Braking, DPU is better George Andrews 02-11-2019 - 14:09
  Re: Auxiliary Braking, DPU is better Dr Zarkoff 02-10-2019 - 18:14
  Re: Auxiliary Braking, SP air repeater car Bunper Cars 02-09-2019 - 21:38
  Re: Auxiliary Braking, SP air repeater car Craig Tambo 02-09-2019 - 23:55
  Re: Auxiliary Braking, CN air repeater car (ex BN) Berg 02-10-2019 - 10:39
  Re: Auxiliary Braking, CN air repeater car yesterday Berg 02-10-2019 - 10:41
  Re: Auxiliary Braking Unit or Brake Slug Max Wyss 02-09-2019 - 23:48
  Re: Auxiliary Braking Unit or Brake Slug George Andrews 02-10-2019 - 09:44
  Re: Auxiliary Braking Unit or Brake Slug Max Wyss 02-10-2019 - 12:07
  Re: Auxiliary Braking Unit or Brake Slug Dr Zarkoff 02-10-2019 - 12:09
  Re: Auxiliary Braking Unit or Brake Slug Max Wyss 02-10-2019 - 12:18
  Re: Auxiliary Braking Unit or Brake Slug diffrent critter 02-10-2019 - 13:36
  Re: Auxiliary Braking Unit or Brake Slug SP5103 02-10-2019 - 15:48
  Re: Auxiliary Braking Unit or Brake Slug Dr Zarkoff 02-10-2019 - 18:17
  Re: Auxiliary Braking Unit or Brake Slug Max Wyss 02-11-2019 - 05:16
  Re: Auxiliary Braking Unit or Brake Slug SP5103 02-11-2019 - 12:22
  Re: Auxiliary Braking Unit or Brake Slug Commenter 02-11-2019 - 12:32
  Re: Auxiliary Braking Unit or Brake Slug Dr Zarkoff 02-11-2019 - 22:13
  Re: Auxiliary Braking Unit or Brake Slug Chris Walker 02-13-2019 - 03:30
  Re: Auxiliary Braking Unit or Brake Slug Dr Zarkoff 02-13-2019 - 10:27
  Re: Auxiliary Braking Unit or Brake Slug Max Wyss 02-14-2019 - 00:52
  Re: Auxiliary Braking Unit or Brake Slug WILL 02-10-2019 - 11:10
  Re: Auxiliary Braking Unit or Brake Slug Berg 02-10-2019 - 11:30
  Re: Auxiliary Braking Unit or Brake Slug (TEBU) Berg 02-10-2019 - 12:03
  Re: Auxiliary Braking Unit or Brake Slug (TEBU) SP5103 02-10-2019 - 15:24
  Re: Auxiliary Braking Unit or Brake Slug (TEBU) Dr Zarkoff 02-10-2019 - 18:18
  Re: Auxiliary Braking Unit or Brake Slug (TEBU) Dr Fuqoff 02-10-2019 - 20:48
  Re: Auxiliary Braking Unit or Brake Slug Max Wyss 02-10-2019 - 12:11
  Re: Auxiliary Braking Unit or Brake Slug Dr Zarkoff 02-10-2019 - 12:21
  Re: Auxiliary Braking Unit or Brake Slug Collector 02-11-2019 - 18:42


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