www.nidec-asi.com

MARINE ELECTRICPROPULSION: SOLUTIONS

AND PERSPECTIVES

Marine & Offshore

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The first references of electric ship propulsion date back to the Twenties.One of the most significant historical examples is represented by the Normandie.

When launched in 1932 Normandie was the largest and fastest ship in the world,with novel design and lavish interiors.

This success was also due to our steam turbo electric propelled, 4 turbo electricengines (160.000 hp – 200.000 hp max) it reached 32.2 (59.6 Km/h)

maximum speed.

Electric PropulsionA long history in the making

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Electric ship propulsion is becoming more and more common in several fields ofapplication, offering the following advantages:

• optimisation of the power generation system• reduction of noise levels• reduction of space requirements• reduction of manteinance requirements and costs

Thanks to these benefits the range of application of electric propulsion for various types ofships is steadly growing in terms of quality and quantity.

Electric PropulsionAdvantages

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We began supplying industrial systems in 1853 with a wide range of marine applications.

Today, NIDEC ASI is one the world’s leading suppliers of custom solutionsfor marine propulsion systems.

Our capabilities and on-going innovation allow us to design solutions to specifically fit ourcustomers’ requirements.

Electric PropulsionOver a Century of Experience

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Cruise vessels

Ferries

Research vessels

Navy vessels

Supply vessels

Chemical tankers

LNG carriers

Megayachts

NIDEC ASI supplies electric motors and generators to optimize overall efficiency andperformance of all type of ships, and to realize dreams and desires of its customers

Electric PropulsionApplications

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20000 kW142 rpm

14000 kVA514 rpm

Alternators

Main switchboard

Propulsion transformers

Propulsion drives

Propulsion motors

20000 kW142 rpm

14000 kVA514 rpm

14000 kVA514 rpm

14000 kVA514 rpm

14000 kVA514 rpm

14000 kVA514 rpm

Electric Propulsion SystemTypical Configuration

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Propulsion motor

Propulsion drivePower

Control

Prduction

Propulsion

Distribution

Harmonic filters (if necessary)

Control & Monitoring

Propulsion drive transformer

Generator

Generator

NIDEC ASI product

Main switchboard

Remote Control

Electric Propulsion SystemScope of Supply

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According to this growing need NIDEC ASI supplies different types of electricalconverters for new power requirements in all kinds of vessels:

DC converters

LCI or synchronous converter

PWM Converters (either LV or MV)

New target power levels are being forecasted and planned to magnitudes whichwere up to a few years ago unthinkable.

Electric PropulsionThe right converter solution

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The Silcopac is a high performance digital thyristorconverter for industrial applications, particularlysuitable for marine solutions.

Main characteristics:

• Two or four quadrant operation• High dynamic response• Auto-tuning• Easy customization, even for complex functions• Powerful diagnostic

Current ratings: 30–4000 A DCInput voltage: 400 – 950 V AC

DC ConverterSilcopac

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Propulsion System: showcasesDC Solutions – Medusa Project

Scope Of Supply:

• LV main alternators

• Propulsion system with 2 x

1500 kW 0/185 rpm DC

motors coupled in tandem

from the collaboration between NIDEC ASI andWartsila was born a new type of research vessel, theMEDUSA project.

The Oceanographic and Fisheries research Vessel(AGS) is a state-of-the-art design, built for world wideOceanographic service including Fishing andGeological research, complying with ICES report 209for underwater radiated noise control.

Propelled by 3.000 kW low noise diesel-electricpropulsion, the vessel is equipped with one retractableazimuth thruster and two tunnel thrusters. All of thisequipment will use NIDEC ASI motors.The vessel is arranged for a number of fishery andoceanographic research operations and will operate inthe Pacific Ocean offshore Chile.

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Scope Of Supply:

• LV main alternators

• Propulsion system with 2

x 1500 kW 0/185 rpm DC

motors coupled in tandem

Propulsion System: showcasesDC Solutions - CEFAS Endeavour

Cefas Endeavour is an ocean-going fisheriesresearch vessel which is based at the port ofLowestoft and is operated by the Centre forEnvironment, Fisheries and Aquaculture Science(Cefas).

It is used to support all aspects of Cefas activitiesfrom fish stock surveys to launching autonomousmonitoring equipment.

The vessel has been in service since 2003.

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12 pulses configuration

24 pulses configuration

For those big vessels where propulsion powers ranging from 13 to 24 MW per shaft line arerequired using synchronous motors, the most applied power converter type is the load

commuted inverter (LCI), or synchroconverter. The synchroconverter can be supplied with12 or 24 pulse configuration depending on the ship’s electric network characteristics.

Propulsion System with LCITypical Configuration

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Power range: 1 – 65 MWOutput Voltage: Air cooling up to 4500 V – Water cooling up to 11000 VOutput frequency: 5 – 95 Hz

Silcovert S is an LCI Thyristor based drive which isideal for wide constant torque operation range

Main characteristics:

• High starting torque and wide constant torqueoperation range• High accuracy• Four quadrant operation• High immunity to any line and “flying restart” aftera supply voltage loss or dip

MV LCI ConverterSilcovert S

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The Saipem 7000 was conceived in the mid 1980sas a multipurpose offshore oil platform installationvessel that would be able to install very large oilproduction platform decks (known as integrateddecks) as well as the decks' supporting structures(known as jackets) using its two very large fullyrevolving cranes.

It would also be able to support the offshorecompletion of the platform by providing hotel andworkshop facilities for large construction crews.Saturation Diving facilities would support subseaconnection work. The vessel's size and semi-submersible form would allow it to operate inworse weather conditions than smaller andconventionally shaped vessels.

Propulsion System: showcaseSilcovert S - Crane and pipelay Saipem 7000

Scope Of Supply:

• Electric propulsion system• Winch system

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Scope Of Supply:•N. 2 Generators 4MVA, 660V

• N. 1 Generator 2,9MVA, 660V,SILCOVERT S, 2200kW, water-cooled

• N. 2 Propulsion Motors, 2200kW,• N. 2 Bow Thruster motors, 750kW,

SVTL2k8KA, water-cooled

Propulsion System: showcaseSilcovert S - Cable layer Teliri

Teliri is a cable ship for the laying and repairof under water cables.

Its mission consists in telecom cable layingand associated trenching operations, telecomcable maintenance and ROV support.

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Power range: 0.75 – 1200 kW

Voltage: 400-480 V – 525 – 690 V

Output frequency: up to 200 Hz

Silcovert GT3000 is an IGBT – basedvariable frequency drive withunmatched levels of adaptability. Thisefficient drive has proven to serve awide range of applications with thehighest levels of energy stability. TheGT 3000’s closed loop vectoralgorithm meets the most demandingtorque application requirements.

LV IGBT SolutionsAC Drives GT 3000

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Propulsion System: showcasesLV IGBT Technologies - De Poli, Gas tankers Marte & Venere

De Poli Tankers BV is a modern Dutch ship-owning company based near the port ofRotterdam, the Netherlands. De Poli is one ofthe bigger commercial operator with a fleet of sixsophisticated IMO 2 chemicaltankers, two LPG tankers and one Ice classed1A chemical/ethylene tanker.

The company expanded its fleet in 2004 with 2LPG tankers of 3000 cbm. The De Poli gastankers meet the highest specifications in theindustry.

Scope Of Supply1450 kVA propulsion transformersLV PWM IGBT propulsion drives

1050 kW, 690 V, 720 rpm squirrel cagepropulsion motors

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50 Hz 440 V

440 V 440 V

2x725kVA8%

2x725kVA8%

690 V 690 V690 V 690 V

1050 kW690 V745 rpm

1050 kW690 V745 rpm

LV IGBT SolutionsTypical Configuration

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WATER-COOLING UNITIGBT MODULESINCOMING LINECONTROL

LV IGBT SolutionsMain Propulsion Drive

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These IGBT Neutral-Point-Clamped PWMdrives are study in semplicity, offering easymanteinance and a very user friendly drivecontrol.

Electrical connections Laminated bus-bar & dc caps

IGBTFiring cardsHeat sink Water pipes

MV IGBT Solutions

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Power range: up to 7200 KVAVoltage: 3300 VOutput frequency: 0-70 Hz up to 140 Hz

The Silcovert TN is a Neutral Point clamped Voltage SourceDrive with IGBT power devices and digital control for highperformance variable speed drives for induction motors.

Main characteristics:

• 12/24 pulse DFE or Active Front End• NPC voltage source configuration• PWM controlled output• Water cooled• Easy integration into automation solutions with serialcommunication capabilities, digital and analogue interfacethat are supplied as standard

Typical liquid cooled SILCOVERT-TNconverter coolant cabinet

MV IGBT SolutionsSilcovert TN

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Propulsion System: showcasesSilcovert TN - Crane vessel Seven Borealis

Scope Of Supply:• MV PWM IGBT NPC 3 levels

Silcovert-TN converter type SVTN10K8 W33 DFE 24P, IP44 cabinetwithout chopper system, water

cooled, 24 pulse line side reaction,3000V output voltage, motor power

5500 kW, motor speed 745 rpm

Seven Borealis will measure 181 x 46metres and with a depth of 16 metres. Itsdraft will range between 7 to 11 metres.The vessel is ship shaped, as opposedto a semisubmersible design, and will beable to perform a speed of 13-14 knots intransit from one operating area toanother. Semisubmersible crane vesselstypically use at least twice the time.

Seven Borealis is designed to be usedfor a range of operations, includingplatform installation, deck installation,spar deck installation, mooringinstallation, subsea installation andplatform removal.

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Propulsion System: showcasesSilcovert TN - Pipelay vessel Saipem Castorone

Saipem PLV is a pipelaying ship. It is amaritime vessel used in the construction ofsubsea infrastructure. It serves to connectoil production platforms with refineries onshore.

To accomplish this goal a typical pipelayingvessel carries a heavy lift crane, used toinstall pumps and valves, and equipment tolay pipe between subsea structures.

Scope of Supply:•Thruster System

• MV PWM IGBT NPC 3 levels typeSVTN10K8 DFE xx P, IP44 cabinet

without chopper system, water cooled,12 pulse line side reaction, 3000V

output voltage, motor power 5500 kW,motor speed 720 rpm

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INCOMINGLINE

CONTROLAND

AUXILIARIES

INVERTER COOLINGSYSTEM

Propulsion System with Silcovert TNMain Drive

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IGCT (Integrated Gate Commutated Thyristor) module

IGCT semiconductors are the building blocks ofa new generation of drives used for marinepropulsion.The development of IGCT basedvoltage source inverters has given the chanceof opening and improving the way to a furtherincrease of ship electric propulsionapplications.

MV IGCT Solutions

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Power range: up to 24000 KVA (higher power on request)Voltage: 3300 VOutput frequency: 10 – 65 Hz up to 100 Hz

Silcovert GN is a Neutral Point ClampedVoltage Source Drive with IGCT power devicesand fields oriented control technology forsynchronous and induction motors.

Silcovert GN

MV IGCT SolutionsSolcovert GN

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Johan de Witt is a Landing Platform Dock (LPD)in use by the Royal Netherlands Navy. The mainmission of the Johan de Witt will be the transportand disembarkation of a fully equipped battalionmarines to the objective area using organiclanding assets such as helicopters and landingcraft or existing port facilities.With the required capabilities the ship is alsowell suited for secondary missions such asmilitary sealift or disaster relief.

Propulsion System with Silcovert GNShowcases - Amphibious Transport Ship Johan De Witt

Scope of Supply:MV PWM IGCT NPC 3 levels type

SVGN9K0 DFE 24 P, IP44 cabinet withchopper system, water cooled, 24 pulse

line side reaction, 3000V outputvoltage, motor power 5500 kW

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Scope of Supply:•Electric propulsion system

• N.4 Variable frequency converters Silcovert-GN with 12 pulsesdiode bridge front end and 3 phase IGCT technology

Pipelay Audacia

Scope of Supply:N.12 Variable frequency converters Silcovert-GN

10k0 DFE 24P , IP54.

Crane and pipelay Pieter Schelte

Propulsion System with Silcovert GNShowcases

Scope Of Supply:•N.2 Variable frequency converters Silcovert-GN 10k0 DFE 12P for Hull 327• N.2 Variable frequency converters Silcovert-GN 20k0 DFE 24P for Hull 328

Ice breakers Hull 327 and 328

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Silcovert GNTypical Configuration

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Drastic reduction of thermal losses in the electrical cabinet room

Reduced noise level

Reduced cabinet dimensions

Higher cabinet protection degree available

Increased reliability (hot standby pump)

Water cooling main circuit Water-cooling System

Water-Cooled SystemAdvantages

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Our integrated engineering process and design standards has lead to advances in:

• Isolation distances• Special mechanical fixings for vibration, pitching and rolling• Special and certified materials selection• Anti-vibration cubicles mounting (shock mounts) when necessary• Electronic cards tropicalization• In-house climatic chamber tests of control racks and aux.

Our field technicians provide constant feedback to our engineering team. They work in orderto guarantee a full life cycle to your components and to meet or exceed ship designers’targets in terms of space, noise levels and performance.

Marine ApplicationsCustom System Design

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NIDEC ASI provides reliable, safe and tested solutions for marine applications. Our quality

assurance program covers all aspect of design, material procurement, manufactoring and

testing. This program meets the requirement of international standards such as ISO 9001.

All the machines manufactured in our plant undergo individual and complete routine tests.

Special test can be performed upon request.

Drive & System Testing Capabilities

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