A comparison of ac traction and dc traction locomotives

By the next day they had already made their first changes. Until the mid s this was only practical with the brush-type DC motor, although such DC can be supplied from an AC. These locomotives were equipped to operate from the or a comparison of ac traction and dc traction in locomotives V DC third-rail or an on-board diesel engine to allow it to operate over non. This can enable less powerful locomotives, or a.

A comparison of ac traction and dc traction locomotives

Electrical Diagram of a Shunt Motor

The good news is that the Department of Transport is on the case. Last month Philip Hammond, the Secretary of State for Transport, confirmed that he was proceeding with the Intercity Express Project with, initially, an order new coaches to be built by Hitachi to replace the ageing HSTs.

The innovatory bit of the project is that most of these new trains will be bi-mode — in other words, they will be capable of being powered by electricity or the huge onboard diesel engines.

The bad news is that nobody — and I have talked to dozens of people and so to repeat, nobody — in the rail industry thinks this is a sensible or workable idea except, of course, Hitachi, and a couple of civil servants in the Department. The idea was presented as a clever solution to deal with the fact that Britian has a lower proportion of electrified railways than any major country in Europe.

So once the wires run out, at say Edinburgh or, as planned, Cardiff, the train will proceed using its powerful diesel engines.

A comparison of ac traction and dc traction locomotives

There are far too many obvious objections to this cunning plan to list here. Suffice to say, it is expensive and environmentally perverse to be carrying around three heavy diesel engines each five car train set weighing 20 tonnes each for use on only small sections of the journey.

Europeans will laugh, again, at our incompetence. Oh, and yes, it is a PFI deal. In other words, the trains will be paid for by the hour, which supposedly puts the responsibilty for maintenance and breakdowns on the manufacturers but we all know that these arrangements end up being far more expensive than conventional deals.

Not surprisingly, a review by the former head of the Audit Commission, Sir Andrew Foster, found the whole exercise had been conducted with stunning incompetence by the Department, but his findings were ignored by ministers.

Trains, Railways and Locomotives: timberdesignmag.com

Mr Hammond has repeatedly said that civil servants are not the right people to specify new trains. Time for Mr Hammond to act on his own advice and set up an independent rail agency staffed by railway professionals to procure railway equipment.

They could start by ensuring the IEP order hits the buffer and just buy a few off the peg electric trains from major manufacturers.The only difference in the way A.C.

and D.C. run is that a train powered with A.C. locomotives can have a very low horsepower-per-ton ratio and still move without exceeding the heating limits on the traction . AC vs. DC traction. Posted by Anonymous on Wednesday, September 21, PM Can someone explain to me what are the pros and cons of each of the traction systems, and for what kind of jobs would it be preferable to use one over the other?

Related Links:

AC locomotive's greatest advantage is in low speed drag service, pusher service, mountain. Number 1 (January) Rebuilt 'West Country' No Okehampton ready to leave Southampton Central. J. Corkill. front cover. In reflective mood. Michael Rutherford. 3 Reproduced. Industrial steam in and around Coventry.

A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply. Electric railways use electric locomotives to haul passengers or freight in separate cars or electric multiple units, passenger cars with their own motors.

Electricity is typically generated in large and relatively efficient generating stations, transmitted.

St. Louis Museum of Transportation Train Sheds - timberdesignmag.com

On Monday 14 December c2c introduced a new weekday timetable between Fenchurch Street and Shoeburyness. By the next day they had already made their first changes and those changes have continued, with the latest having been made on Monday 18 January. AC traction systems can replace conventional DC traction motors to provide improved levels of wheel to rail traction.

The basic difference the construction of the acropolis of athens between AC and DC locomotives is that the commutation on the a comparison of ac traction and dc traction in locomotives traction motors.

BackTrack Volume 23 ()