Electric Propulsion – substantial savings in space and weight, with better total efficiency

Electrification Solutions

Electric Propulsion

Includes variable speed Auxiliary Generators, energy storage, and Permanent Magnet technology plus a ship-wide DC power distribution system. The need for large switchboards and bulky transformers is omitted which means substantial savings in space and weight as well as far better total efficiency.

Technologies Used

  • Variable speed Auxiliary Generators
  • Energy storage system
  • WE Drive™
  • Permanent Magnet
  • Propulsion Motors
  • Ship-wide DC power distribution system

Customer Benefits

  • Means substantial savings in space and weight as well as far better total efficiency.
  • Highest energy efficiency via hybridisation → substantial savings and enhanced competitiveness.
  • Lower weight and less space consumed by the electrical system
  • Increased safety and flexibility
  • Preventing blackouts or ship wide power failures

Options

  • ESS
  • Shore power solutions

How it Works

Direct Drive Permanent Magnet Shaft Generator for 2-stroke (slow speed) applications

The permanent magnet rotor is mounted on the intermediate shaft of the propulsion system. Mass and inertia are very low and thus the impact on propulsion system torsional vibration calculations (TVC) remains minimal. No additional bearings are required, thus the propeller shaft system design remains uncompromised. The generator housing, consisting of a compact, feet-mounted stator package, including the rotor and intermediate shaft, is positioned on the generator bed in the propeller shaft line and connected via flanges.

For 4-stroke (medium speed) applications

Electric Propulsion uses the common DC-bus of the WE Drive® technology, thereby enabling new methods to distribute power in energy efficient and economical ways. Large electrical consumers such as thruster or large compressors can have their dedicated Inverter Units (INU) connected directly to the common DC-bus. The WE Drive® DC-bus in this solution is fed from Shaft Generators or Auxiliary Generators. Power can be distributed to a ship’s electrical network, to thrusters, and to propulsion machinery. Electric Propulsion also enables efficient power distribution and controlled short circuit currents, which allows lighter switchboards in marine installations.

Solutions Leading Marine Electrification

WE equip your ship for success.

Our solutions build on widely proven technologies and are applicable for most ship types and propulsion machinery (e.g. low speed direct driven propeller with 2-stroke Main Engine, or medium speed reduction gear driven propeller with 4-stroke Main Engine). 

WE Tech solutions utilise variable frequency drive technology (WE Drive™), permanent magnet generator technology, DC-bus power distribution and Energy Management System(EMS).

With our domain expertise, you can get a ship with an energy system built the way it should.

Variable frequency drive technology for generator/motor applications is a compact and robust modular design.

The variable speed permanent magnet generator is lightweight, and compact-sized with the highest efficiency over the full speed and power range. It is virtually maintenance-free. We also offer solutions based on synchronous and asynchronous generator technology.

We use the latest lithium-ion technology from the Energy Storage System (ESS) suppliers. With a DC-DC converter, we integrate the ESS into our solution.

With the Energy Management System(EMS), we control various operation modes of the ship as well as start/stop sequences, etc. The EMS also interfaces with other control systems on board a ship.

Shore power is conditioned for the vessels’ electrical system via the WE Drive. Vessels become unaffected by the variations in voltages and frequencies of the national power grids worldwide – shore power is always matching.

Fuel Cell Integration via DC/DC conversion to the ship energy efficient power distribution system. Seamless operations utilising Fuel Cells and ESS combinations for zero emission power.

Reference cases

Solutions applied on over 300 vessels worldwide

We have been focusing on lowering emissions for years by providing cost-effective and sustainable lifetime solutions to the shipping industry. Our benchmarking solutions have already been applied to more than 300 vessels worldwide.

Book Your Meeting

Contact us today to tailor a solution for your vessel.

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