First Aircraft Carrier Motor for the Queen

By Keith Henderson at April 07, 2011 05:03
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This week saw delivery of the first Advanced Induction Motor (AIM) to shipbuilder BAE System’s Govan, yard for installation in the Royal Navy's Queen Elizabeth Class (QEC) aircraft carrier construction blocks, presently being built on the River Clyde in Scotland.

The ship has an Integrated Full Electric Propulsion (IFEP) system and uses four 20MW (27,000 hp) electric motors of a similar type to that used in the UK’s Type 45 destroyers which use only two, one per shaft. The motors are driven by a Converteam VDM 25000 pulse width modulated converter which produces a variable frequency output allowing the shaft speed to be controlled across the full operating range, thereby eliminating the need for a gearbox. The four motors, two per shaft, are located in three separate compartments for better damage control and suvivability.

A platform management system is provided by L-3 Communications and includes a fully integrated propulsion power management system that controls the operation of the turbo and diesel generating sets for optimum efficiency.

For aspects of stability the diesel gensets are located low in the ship and were delivered at an earlier stage of the construction. The Converteam generators are powered by two Wärtsilä 16V38s of 11 MW (15,000 hp) and two Wärtsilä 12V38s of 9 MW (12,000 hp). The two relatively lighter Rolls-Royce MT30 gas turbine generators are mounted higher in the ship to shorten the air downtakes and exhausts.

The range of the carrier without refuelling is stated as being 10,000 nautical miles (19,000 km).

Caption: The first AIM propulsion motor is lowered in to place in a construction block of the aircraft carrier HMS Queen Elizabeth.
Photo credit: BAE Systems



Caption: Queen Elizabeth Class Power and Propulsion Single Line Diagram
Image credit: Converteam UK Ltd


Comments (1) -

This is an advancement in marine technology in the marine industry.  I hope someday that magnets can be use to power the marine engine on ships, this eliminate pollutions.

Reynaldo Agustines

Reynaldo Agustines |     4/13/2011 4:10:56 AM #

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