Innovative Power Transmission
RENK AED
Advanced Electric Drive
The ultimate propulsion for quiet ships
RENK innovative propulsion solutions
RENK AED Advanced Electric Drive
The ultimate propulsion for quiet ships
Typical application of RENKs AED as a slow-speed option on corvettes and frigates
The experience RENK has accumulated Electric motors represent a technically proven and increasingly
since 1960 in designing and manufacturing popular option for marine and hence naval, megayacht or research
marine gear units provides the basis for vessel propulsion systems.
the engineering of gas-turbine and diesel-
engine driven propulsion systems for navies With improved frequency stability and efciency, this is facilitated
throughout the world. Over 600 propulsion by the power electronics used nowadays and installed between
units with RENK gears are in service today, the onboard generators and the onboard power system. An alter-
including gas-turbine installations on vari- native to electrical direct-drive systems with their large, bulky and
ous NATO frigates and diesel-engine pro- heavy motors running at propeller speed, are high-speed motors
pulsion packages for corvettes and patrol with reduction gear units.
vessels of 40 nations worldwide. Included
are highly sophisticated CODAG systems for A perfect realization of this concept is RENKs AED where the
the German and Turkish navies and the US electric motor and the gearing are installed on a common raft
Coast Guard as well as the hybrid CODELAG elastically mounted. The special advantages: compact footprint,
propulsion system for the Italian FREMM easy installation, low weight, and incomparably quiet operation.
and the German F125 frigates. A complete
propulsion module is now available in the
form of the RENK AED (Advanced Electric
Drive) which is the subject of this brochure.
2
Applications for RENK AED
Corvettes, frigates: silent running and low speed
Megayachts: low-noise main propulsion
Submarines: low-noise main propulsion
Research vessels: low-noise main propulsion
Fishery protection vessels: low-noise main propulsion
Special vessels such as cable- or pipe-laying ships: main propulsion
In all these applications, RENKs AED integrates perfectly with the onboard electrical
system and replaces the commonly used direct-drive motor.
as the main propulsion system on megayachts and many other
Features
Preassembled, very straightforward modular installation
Compact and ultra lightweight, 40 percent less than a direct-drive motor
Very low installation height
High-elasticity propeller coupling prevents noise radiation
Low-noise operation thanks to water-jacket cooled electric motor, low-noise gear
unit, specially developed soft-elastic mounting
Suitable for both xed- and controllable-pitch propellers
The lowest noise level to naval standards, so no special adjustments needed
Output speed adapts exibly to propeller requirements
Standard components, therefore low maintenance input
3
RENK innovative propulsion solutions
RENK AED for ratings of up to 6 MW
The all-in propulsion module
RENKs AED is available in four ratings, from 1.4 to 6 MW. Intermediate requirements can be served
by adjusting the power electronics of the next-larger motor. This allows a continuous range of outputs
up to 6 MW.
High-speed electric motor
Reduction gear
Flexible coupling
Vibration-absorbing,
lightweight raft
High-elasticity
mounting
AED 14 AED 23 AED 37 AED 60
Max. power (kilowatt) 1400 2300 3700 6000
Input RPM, electric motor 1800 1800 1800 1900
Propeller RPM, selectable range 250-450 250-400 190-350 190-300
Electric-motor voltage 690 690 690 (4000) 4000
1)
Weight in tonnes (t) 13 18 23 34
1) weight includes noise insulation and high-elasticity output coupling
4
RENK AED 37
Less weight, less space
A dimensional comparison between a
RENK AED and a low-speed direct drive
(red) clearly shows the size difference.
The RENK AED 37 weighs 23 t
compared with the same-output direct-
drive main propulsion units 35 t.
5
RENK innovative propulsion solutions
RENK AED
Installation options
Direct drive for megayachts and researc
research
ch vessels
quiet and powerful
Ideal combined
with xed-pitch propeller,
yet controlable-pitch propeller
possible, too.
Supplementary propulsion system for frigates
and corvettes compact and
and quiet
In the propeller shaft
of a CODELAG system
Combined operation of gas
turbine and RENK AED
solely gas turbine operation
solely RENK AED operation
In front of a CODELAG
gear system
Supplementary drive for corvettes
and frigates running at silent and
low-speed. Noise at submarine level.
6
RENK AED
As quiet as a submarine
RENKs AED is engineered for very low-noise operation. It has
a rigid lightweight raft with a high natural frequency and soft-elastic
mounting. In combination with the low noise level of the electric
motor and the double-helical reduction gear unit, the structure-
borne noise is well below ICES 209 and what is required of frigates
at low speed. In fact, it is even on a par with submarines.
Structure-borne noise on the vessel's foundation, 1/3 octave band
DW Shipconsult, Report 1/1058-1
The concept is fully
compliant with requirements
of a propulsion system for
all quiet ships.
...the AED will be able to
achieve submarine noise levels.
10 100 1.000 10.000
Frequency [Hz]
Limit curve research ship ICES209
Limit curve for low-noise naval vessels at 12 kn
Noise level submarine 4 kn
RENK AED, full load
RENK AED, half engine speed
7
RENK Aktiengesellschaft
Augsburg Plant
Ggginger Str. 73
86159 Augsburg
Germany
Phone +49.821.5700-627
Fax +49.821.5700-559
Email info.augsburg@renk.biz
www.renk.eu
An MAN SE Company
Edition: 09.14/200/ke/d
