Power-Dense Solutions for Advanced Ship Propulsion

Leonardo DRS provides integrated electric drive (IED) and hybrid electric drive (HED) ship propulsion solutions. HED arrangements can be gear-mounted or shaft-mounted.

Our motor and drive systems provide advantages in flexibility, modularity and commonality; supporting requirements for fuel savings and growing power efficiency demands on future ships.

Regardless of fuel prices, the more often you have to re-fuel a ship - when you are alongside the re-fueling ship - you are more vulnerable ... an HED propulsion system gives you more time on station and less time at risk.

benefits of our e-drive technology

IMPROVING EFFICIENCY & EMISSIONS

  • Prime movers operate at most efficient, constant speed,
  • Controllable pitch propellers may also be eliminated
  • Power generation equipment can be switched on and  off as needed

 

ADVANCING SURVIVABILITY & FLEXIBLE ARCHITECTURE

  • Flexibility in locating the prime movers across the platform (IED)
  • Additional redundancy on the drive shaft (HED)
  • Ability to send the power where needed (IED)
  • No need to align prime movers with the shafting (IED)

 

REDUCING NOISE & VIBRATION

  • For all-electric configurations noise and vibration are improved by elimination of the main reduction gear
  • Shaft-mounted hybrid electric drive makes it possible to decouple the reduction gear 
  • Both configurations benefit from prime movers running at a constant speed

 

LOWERING MAINTENANCE COSTS

  • Reduction of the total number of prime movers to maintain
  • Possible elimination of controllable pitch propellers and their support systems
  • Less wear and tear on prime movers as they are operated under less stressful conditions

Machine Configuration Examples

1.7 MW Shaft-Mounted Hybrid Electric Drive (HED) Motor

Leonardo DRS power dense low speed (120 rpm) permanent motor with large air gap allows for bearing-less configuration, which simplifies the propulsion shaft.


1.5 MW Gear-Mounted Hybrid Electric Drive (HED) Motor

Leonardo DRS lightweight permanent magnet motors allow for direct mounting onto the gear.


36.5 MW Integrated Electric Drive (IED) Motor

Leonardo DRS’ full electric drive permanent magnet motor.


Power-dense 625HP Hybrid Electric Drive (HED) Motor

Selected to provide hybrid electric drive propulsion for the U.S. Coast Guard Offshore Patrol Cutter program, the power-dense, water-cooled PA44 is only 395 lbs and rated up to 625HP providing 1,100 ft-lbs. @ 3000RPM.

Hybrid Electric Drive GEAR OR SHAFT-MOUNTED POSITIONING

Shaft-Mounted Hybrid Electric Drive Motor Configuration

Shaft-Mounted Hybrid Electric Drive (HED) Motor Configuration

Lower noise signature than gear-mounted motor.


Gear-Mounted Hybrid Electric Drive (HED) Motor Configuration Gear-Mounted Hybrid Electric Drive (HED) Motor Configuration

Compact arrangement with high shock capability.

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