HHP-8/Acela Question

[battalion51]

Completely random, and a bit obscure, and I think I know the answer. Do the Acelas and HHP-8's use AC or DC traction motors? I'm guessing AC, but I may be wrong.

 

[AlanB]

Completely random, and a bit obscure, and I think I know the answer. Do the Acelas and HHP-8's use AC or DC traction motors? I'm guessing AC, but I may be wrong.

AC.

 

[PRR 60]

Eight AC, three-phase asynchronous motors, 1537hp each (four per power car). The variable voltage (11-25kV) and frequency (25 and 60hz) catenary supply is first stepped down via a transformer, then rectified to 2850V DC, and then inverted back to AC to power the motors.

 

[Fan Railer]

Eight AC, three-phase asynchronous motors, 1537hp each (four per power car). The variable voltage (11-25kV) and frequency (25 and 60hz) catenary supply is first stepped down via a transformer, then rectified to 2850V DC, and then inverted back to AC to power the motors.

what are the specs for the HHP-8 motors then?

 

[jis]

4 fully suspended 1.5 MW (2,000 hp) Alstom Onix AC Traction Motors. They are physically larger than the Acela power head motors.

The DC link is the same I believe but with beefed up capacity for both supplying the more powerful motors and a heftier HEP alternator than the Acela power heads have. Also I believe they have a heftier transformer to support the higher load.

Remember, each Acela power head has to deliver only 6000 and change HP, whereas a single HHP-8 has to deliver 8000HP.

 

[PRR 60]

4 fully suspended 1.5 MW (2,000 hp) Alstom Onix AC Traction Motors. They are physically larger than the Acela power head motors.

The DC link is the same I believe but with beefed up capacity for both supplying the more powerful motors and a heftier HEP alternator than the Acela power heads have. Also I believe they have a heftier transformer to support the higher load.

Remember, each Acela power head has to deliver only 6000 and change HP, whereas a single HHP-8 has to deliver 8000HP.

Beat me to it. Bigger motors: more power in and more power out.

 

[Fan Railer]

But it would be correct to still say that Alstom is the manufacturer for both propulsion systems (HHP and Acela)?

 

[jis]

But it would be correct to still say that Alstom is the manufacturer for both propulsion systems (HHP and Acela)?

yes.

 

[PRR 60]

But it would be correct to still say that Alstom is the manufacturer for both propulsion systems (HHP and Acela)?

yes.

And also the AC-converted AEM-7's.

 

[Fan Railer]

But it would be correct to still say that Alstom is the manufacturer for both propulsion systems (HHP and Acela)?

yes.

And also the AC-converted AEM-7's.

^lol yes; that, i knew.

http://web.archive.org/web/20060325065654/http://www.transport.alstom.com/home/Products_and_Services/RAIL_VEHICLES/Subsystems/10741.EN.php?dir=/home/Products_and_Services/RAIL_VEHICLES/Subsystems/&docId=10741&languageId=EN&docLink=7647

This was back in the day when they actually released this kind of information out openly. I wish there was this kinda thing for newer locomotives and EMUs, but no one seems to be releasing detailed equipment specs anymore.

 

[Acela150]

But it would be correct to still say that Alstom is the manufacturer for both propulsion systems (HHP and Acela)?

yes.

And also the AC-converted AEM-7's.

And yet they turned out a lot better then the HHP's...