Sendai Subway 1000 series

The Sendai Subway 1000N series (仙台市交通局1000N系電車) is a rapid transit electric multiple unit (EMU) train type operated on the Sendai Subway Namboku Line in Sendai, Japan.

Sendai Subway 1000N series
Sendai subway 1014 20081021.jpg
A Sendai Subway 1000N series train, October 2008
In service1987-present
ManufacturerKawasaki Heavy Industries
Number built84 vehicles (21 sets)
Formation4 cars per trainset
Capacity144 passengers per car (58 seating, 54 post-refurbishment)
Operator(s)Sendai City Transportation Bureau
Line(s) servedSendai Subway Namboku Line
Car length21.75 m (71 ft 4 in) (end cars)
20 m (65 ft 7 in) (intermediate cars)
Width2.89 m (9 ft 6 in)
Height4.04 m (13 ft 3 in)
Doors4 pairs per side
Maximum speed75 km/h (45 mph)
Weight128.0 t (126.0 long tons; 141.1 short tons)
Traction systemOriginal: Chopper control
Refurbished: IGBTVVVF
Traction motors160 kW (210 hp)
Original: DC series-wound motor
Refurbished: 3-phase AC induction motor
TransmissionWestinghouse-Natal drive;
Gear ratio: 5.73
Acceleration3.0 km/h/s (3.5 km/h/s post-refurbishment)
Deceleration3.7 km/h/s (service maximum)
4.5 km/h/s (emergency)
Electric system(s)1,500 V DC (nominal) from overhead catenary
Current collection methodPantograph
BogiesSS-005, SS-105
Braking system(s)Electromagnetic braking
Safety system(s)ATC/ATO (Fuzzy logic)
Track gauge1,067 mm (3 ft 6 in)

The 1000 series was the world's first train type to use fuzzy logic to control its speed, and this system developed by Hitachi[1] accounts for the relative smoothness of the starts and stops when compared to other trains, and is 10% more energy efficient than human-controlled acceleration.[2] It was the recipient of the 28th Laurel Prize award presented by the Japan Railfan Club.


From 2004 until 2013, the 1000 series trains will undergo mid-life refurbishment to extend their lifespan. As of April 2009, 12 sets have been refurbished,[3] and the refurbished sets are renamed 1000N series.

The refurbished trains include the following features.


See alsoEdit


  1. ^ Andrew Pollack (April 2, 1989). "Fuzzy Computer Theory: How to Mimic the Mind?". The New York Times. Retrieved 2011-03-11.
  2. ^ Philip Elmer-DeWitt (September 25, 1989). "Time For Some Fuzzy Thinking". Time. Archived from the original on October 22, 2010. Retrieved 2011-03-11.
  3. ^ Retrieved 2011-03-11.

External linksEdit