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Passenger Trains > Would a/c traction be practical for a passenger unit?Date: 08/19/19 12:33 Would a/c traction be practical for a passenger unit? Author: brc600 Wondering if an a/c would be less slippery than d/c for passenger?
Date: 08/19/19 12:57 Re: Would a/c traction be practical for a passenger unit? Author: DevalDragon I don't think wheel slip has ever been much of a problem with passenger trains.
Ask EMD how their F69PH-AC project went. Date: 08/19/19 13:01 Re: Would a/c traction be practical for a passenger unit? Author: mp109 I believe the dual mode versions of the P42DC's used in the Empire service are AC traction.
Date: 08/19/19 13:02 Re: Would a/c traction be practical for a passenger unit? Author: PRR1361 That's what's under the ACS Sprinters, the Chargers, and all over Europe.
Date: 08/19/19 13:22 Re: Would a/c traction be practical for a passenger unit? Author: chuchubob mp109 Wrote:
------------------------------------------------------- > I believe the dual mode versions of the P42DC's > used in the Empire service are AC traction. Yes, the P32AC-DM dual mode locomotives are AC traction. Date: 08/19/19 13:23 Re: Would a/c traction be practical for a passenger unit? Author: chiefds And F125's.
Date: 08/19/19 17:18 Re: Would a/c traction be practical for a passenger unit? Author: colehour I believe that the South Shore initially had AC electrification, but I don't know if the traction motors were AC or DC. One reason they went to DC, I believe, was compatibility with the IC. I recall that there may also have been some local ordinances regarding AC as well.
Does anyone know if the traction motors were AC, and if so, how did they perform compared to DC? Date: 08/19/19 19:07 Re: Would a/c traction be practical for a passenger unit? Author: choodude 29 AEM-7s were rebuilt with AC traction.
Brian Date: 08/19/19 20:02 Re: Would a/c traction be practical for a passenger unit? Author: KV1guy Yes it is. DC motors slip all the time, especially on contaminated rail or with leaves during the fall. And when one axle slips, they all reduce power to stop the slip. AC's have individual inverters, one slips, only power reduced to that axle. Another thing is in case the HEP inverter goes bad, one axle can be taken off line and its inverter used to provide HEP.
DevalDragon Wrote: ------------------------------------------------------- > I don't think wheel slip has ever been much of a > problem with passenger trains. > > Ask EMD how their F69PH-AC project went. Date: 08/19/19 20:14 Re: Would a/c traction be practical for a passenger unit? Author: brc600 You confirmed what I heard.
KV1guy Wrote: ------------------------------------------------------- > Yes it is. DC motors slip all the time, > especially on contaminated rail or with leaves > during the fall. And when one axle slips, they > all reduce power to stop the slip. AC's have > individual inverters, one slips, only power > reduced to that axle. Another thing is in case > the HEP inverter goes bad, one axle can be taken > off line and its inverter used to provide HEP. > > DevalDragon Wrote: > -------------------------------------------------- > ----- > > I don't think wheel slip has ever been much of > a > > problem with passenger trains. > > > > Ask EMD how their F69PH-AC project went. Date: 08/19/19 21:37 Re: Would a/c traction be practical for a passenger unit? Author: PHall KV1guy Wrote:
------------------------------------------------------- > Yes it is. DC motors slip all the time, > especially on contaminated rail or with leaves > during the fall. And when one axle slips, they > all reduce power to stop the slip. AC's have > individual inverters, one slips, only power > reduced to that axle. Another thing is in case > the HEP inverter goes bad, one axle can be taken > off line and its inverter used to provide HEP. > Some AC's use individual inverters, like GE's. EMD started out using one inverter per truck. Their current production uses the 1 axle per inverter. Who says old dogs can't learn? > DevalDragon Wrote: > -------------------------------------------------- > ----- > > I don't think wheel slip has ever been much of > a > > problem with passenger trains. > > > > Ask EMD how their F69PH-AC project went. Date: 08/19/19 22:32 Re: Would a/c traction be practical for a passenger unit? Author: ts1457 Does Amtrak have problems with DC traction motors becoming unwound?
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