Splitterskyddad EnhetsPlattform
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The SEP modular armoured vehicle (''Splitterskyddad enhetsplattform''), Swedish for "Fragmentation Protected Standard Platform", is a hybrid diesel-electric powered
armoured fighting vehicle An armoured fighting vehicle (British English) or armored fighting vehicle (American English) (AFV) is an armed combat vehicle protected by vehicle armour, armour, generally combining operational mobility with Offensive (military), offensive a ...
developed by
BAE Systems AB BAE Systems AB is subsidiary holding company for the Swedish assets of BAE Systems Land & Armaments, whose ultimate parent is the British defence contractor BAE Systems. The portfolio in 2020 contained the companies ''Systems C-ITS'', involved ...
. The vehicle is codenamed "Thor". The first demonstration models were produced in 2000 (tracked) and 2003 (wheeled). It was originally contracted by the
Swedish Defence Materiel Administration The Swedish Defence Materiel Administration (, FMV) is a Swedish government agency that reports to the Ministry of Defence. The agency is responsible for the supply of materiel to the Swedish defence organisation. It is located in Stockholm. D ...
. The series-hybrid electric drivetrains for both the wheeled (SEP-W) and two generations of tracked (SEP-T) vehicles were designed and manufactured by MAGTEC (Magnetic Systems Technology Ltd, Sheffield, UK). SEP-W was equipped with in-wheel HMED (Hub-Mounted Electric Drive) units, each rated at over 100 kW and producing 20,000Nm at each wheel in low range. This performance gave the vehicle individual wheel speed, position and torque control, providing electronic limited-slip differential, torque-vectoring, and importantly on-demand skid-steering (fully laden on dry tarmac), enhanced packaging and protection, and greatly improved suspension travel. SEP-T was equipped with a novel 'cross-drive' pack incorporating concentric twin-traction and twin-steer motors, giving fully electric 'drive by wire' steering via the outboard gearboxes. In both types of vehicle, two high-performance diesel engine/generator sets were installed, providing dual redundancy and further protecting driver and co-driver from side ballistic impacts/penetration. Power scheduling and operating points for the generator sets provided optimised fuel usage and performance, thus reducing the requirements for refuelling support in the field. The design of the drivetrains in both vehicle types permitted novel vehicle architectures and optimised crew and payload packaging, without compromising suspension/transmission design or performance. Both vehicle types were put through extensive testing of performance, durability, EMC etc., and were designed and constructed to allow straightforward scale-up into volume production.


Development

The project began in 1994. Sweden's original requirement was 1600 vehicles. The vehicles were planned to enter service in 2014 and the modular payload configuration was expected to allow up to 24 variants. In February 2008, the Swedish Armed Forces announced the cancellation of the SEP programme. The reasons stated were a 'lack of an international collaborative partner' which prevented the Swedish armed forces from continuing the project alone. The vehicle was dropped from the British
FRES Fres () is a village and former municipality in the Chania regional unit, Crete, Greece. Since the 2011 local government reform, it is part of the municipality Apokoronas, of which it is a municipal unit. The municipal unit has an area of . The ...
programme in July 2007. In 2009 BAE announced that Kongsberg Devotek would develop gears and transmissions for the vehicle. Later Sweden decided to buy the Finnish
Patria AMV The Patria AMV (Armoured Modular Vehicle) is an Eight-wheel drive, 8×8 multi-role list of military vehicles, military vehicle produced by the Finland, Finnish defence industry company Patria (company), Patria. The main feature of the AMV is its ...
. As of July 2009, no country is considering the vehicle.


See also

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Patria AMV The Patria AMV (Armoured Modular Vehicle) is an Eight-wheel drive, 8×8 multi-role list of military vehicles, military vehicle produced by the Finland, Finnish defence industry company Patria (company), Patria. The main feature of the AMV is its ...
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MT-LB The MT-LB (, literally "multi-purpose towing vehicle light armored") is a Soviet Union, Soviet multi-purpose, fully amphibious vehicle, amphibious, tracked Armoured fighting vehicle, armored fighting vehicle in use since the 1970s. It was also ...


References

Military vehicles of Sweden {{mil-vehicle-stub