Sector overview shipbuilding

Electrical drives and systemsfor shipbuilding

VEM drive solutions for all vessel typesWe at VEM have led the world in marine electrical drive technology for decades. Our profound know-how comes from atrack record in electrical engineering dating back 125 years; our employees at VEM build generators and motors for seagoing vessels around the world including cruise liners, yachts, large-volume ferries, container vessels, chemical tankersand specialised vessels that we equip with shaft and diesel generators, pod drives, and thruster or propulsion units.

Manufacturing motors and generators up to a total weight of 200 t for all vessel types is part of our everyday work – ourportfolio includes propeller drives from 7.5 to 10 MW for mega-yachts of more than 90 meters in length alongside synchronousVEM generators delivering up to 30 MVA as well as propulsion units at up to 30 MW that we build for the current generation of five-star-plus cruise liners – motors that meet the very high demands placed on an internal power supply.

Broad service rangeLow-voltage motors for various auxiliary drives round off our range. Exceptional reliability, durability, efficiency and environ-mental friendliness due to the high level of efficiency as well as ease of modification are also key features in this type ofdrive, features that ensure universal application scenarios for VEM low-voltage motors. We also supply pole-changing motors in robust cast iron for winch drives on cargo vessels alongside air conditioner motors on modern cruise liners.

Mutual success at VEM is a result of bespoke high-performance engineering that forms the basis for our shipbuilding portfolio – strictly in accordance with all of the classification regulations applicable.We respond quickly and flexibly to customer needs with comprehensive customer service for machine delivery on time andon-site commissioning even under the most difficult conditions.

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At home on the high seasWe at VEM supply major names in system suppliers and shipyards that share decades of experience in marine engineering;our customers dimension the entire electrical drive technology for the vessel and work with all the leading shipbuildingcompanies in Europe, Asia and the Americas in their shipbuilding projects.

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Auxiliary drives,

low and high-voltage

Generators

(PTO resp. Diesel)

Shaft generators

Thruster resp.

transverse thruster drives

Combi drives

Asynchronous

propulsion motors

Synchronous

propulsion motors

Asynchronous and

synchronous pod drives

Research and specialised vessels X X X X X X

Supply vessels X X X X X X

Ferries X X X X X X X

Cruise liners X X X X X X

Mega yachts X X X X X X

Container vessels X X X X

Oil and LHG tankers X X X X X X

Navy X X X X X X X

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VEM motors and generators for use on various vessel types

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Shipbuilding certifications – standard at VEMVery specific and technically demanding regulations apply to marine drives due to the heavy environmental, operationaland reliability requirements placed on them. Certification bodies monitor work processes in the shipyard and at supplierfactories during construction, reconstruction and repairs to seagoing vessels in technical audits and acceptance tests toensure that these requirements are met. Our design and engineering calculation departments go one step further – wework closely with certification bodies on new drive solutions up to construction and type approval on the test-bed for electrical machines. Our solutions are closely examined under varying conditions for successful certification according tospecification.

We at VEM have the following marine engineering certifications: ☐ Klassifikations- und Beratungsgesellschaft DNV GL ☐ American Bureau of Shipping (ABS) ☐ Lloyds Register of Shipping (LR) ☐ Bureau Veritas (BV)☐ Russian Maritime Register of Shipping (RS) ☐ Registro Italiano Navale (RINA)

Additional classification organisations available on request!

Origin of photo material: Siemens Norwegen, Project “Bourbon Orca”

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A good choice – marine motors from VEMVEM motors are a good choice in seawater-resistant configurations for auxiliary units in seagoing vessels, as they are designed and built to withstand the specific climatic and mechanical loads at sea below deck or in the offshore industry;all of our motors come with type-test certificates from a variety of international classification bodies. We also supply bespokedesign solutions for applications above deck in compliance with IP 56.

Energy-efficient motors are in demand across the world, and corresponding regulations have been drawn up. We at VEMare committed to working to these requirements, although EU directives do not require efficiency labelling on marine drives.Ever-increasing numbers of shipbuilding companies and system suppliers have seen a need to use IE-marked motors withshipping operators demanding energy-saving and environmentally friendly marine solutions.

Robust low-vibration cast-iron VEM marine drive designs have established their worth for decades, with reliable drives forfans, pumps, capstans, and turning and lifting gear on passenger, container vessels, freighters, fishing boats, tankers,dredgers, mega-yachts and in the offshore industry. All of these motors are naturally also available in explosion-protectionversions if needed.

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Technical specifications

Squirrel-cage asynchronous motors, dimensions and power allocation according to IEC 60072/EN 50347

Dimensions: 56 – 400 Output range: 0.06 – 710 kWVoltage/frequency: All common voltages, 50/60 HzEfficiency classes: IE2 or IE3 according to IEC/EN 60034-30-1IP codes: IP 55, optional IP 56 according to IEC/EN 60034-5Cooling: according to IEC/EN 60034-6

IC 410, IC 411, IC 416, (IC 71W on request)Designs: IM B3, IM B35, IM B5 and derivatives according to IEC/EN 60034-7Classification organisations: DNV GL, BV, LRS, RMRS, ABS, other organisations available on requestAmbient temperatures: according to the regulations of the corresponding classification bodyExplosion protection: Motors for use in Zone 1, Zone 2, Zone 21 and Zone 22 available as options

Auxiliary drives (low and high-voltage) – versatility is the keyVEM asynchronous machines designed for the upper low and medium-voltage applications are suitable for a variety ofdeck and auxiliary drives due to their versatility. We manufacture our tried-and-true standard of asynchronous motors withcast iron housing at axle heights of 355 to 710. Our specialised production process makes it possible to deliver the machineordered to our customers in the shortest possible time. We also provide our machines in welded housings ready for vesselinstallation regardless of installation requirements. In addition to different foot or flange mountings, we will also fit auxiliarydrives with various degrees of protection as required for installation above and below deck. Our motors can serve cuttinghead drives on work boats, amongst other things, or work reliably as pump drives for dredgers and tankers.

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Technical specifications

Output range: 500 – 5,000 kWVoltage range: 400 – 11,000 VFrequency: 50 Hz, 60 Hz or for

converter operationSpeed range: 500 – 1,800 rpmNumber of poles: 4 – 12Cooling: IC 8A1 W7 and IC 01

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VEM generators – a fail-safe on-board power supply The power requirement on seagoing vessels makes synchronous generators essential. We provide non-salient and salientpole versions with welded housings and brushless excitation in a number of designs, and equip the machines with digitalcontrollers and the appropriate monitoring systems according to specification. In addition to roller bearings, we mainly useflange design friction bearings in low-output systems, or pedestal bearings with the necessary complex lubrication systemson high-output generators. We design machines for operation with frequency converters in 8, 10, 12 or 14-pole versionsfor use on high-output low-speed diesel engines.

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Technical specifications

Output range: 500 – 30,000 kVAVoltage range: 400 – 11,000 VSpeed range: 500 – 1,800 rpmNumber of poles: 4 – 14Cooling: IC 8A1 W7

Saving costs with powerful VEM shaft generatorsOur product range at VEM includes powerful shaft generators compliant with IP 44 with air-water heat exchangers fitted.These components used in modern shipbuilding bring about substantial reductions in fuel consumption compared to conventional separate diesel generators. These units are installed directly onto the main shaft between the main drive andpropeller, and generate the energy required on the vessel using heavy oil. Container vessels in particular use a lot of electricity due to the refrigerated containers on board, and our units are significantly more efficient than high-speed dieselmotors.

We dimension generators for operation using passive rectifiers and frequency converters.

The machines are designed to act as boosters or “powertake home” units; the latter allows the crew to compensatefor main machine failure. The shaft generator acting as adrive motor can still bring the vessel back safely to the nextport. In booster mode on the other hand, these machinestransfer additional power to the propeller shaft in certain situations. We deliver the stator for shaft generators to theshipyard, where our service employees mount the salientpoles directly onto the main shaft of the vessel if required.These machines are designed for IP 44 and equipped withan air-water heat exchanger.

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Technical specifications

Output range: 500 – 7,500 kVA/500 kW – 7,500 kWVoltage range: 400 – 6,600 VFrequency range: 7 – 20 Hz (using a frequency converter)Speed range: 40 – 200 rpmNumber of poles: 16 (24 available on request)

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VEM thrusters – when it’s all about positioningElectric motors are used as drives for thrusters and pump jets on almost all vessel types. These systems are indispensableon large vessels, and play an important role in accurate positioning on pipe or cable-laying and crane vessels. Bow andstern thruster drives on these specialised vessels deliver up to 5 MW.

Our motors are available in IM 3011 and IM 1001 designs with mounted air-water heat exchangers for IP 54 or circuit-ventilated for IP 23.

In addition to the VEM standard series with cast iron housing, we also provide custom-welded housings. These direct-drive units (DOL) operate in S1 or S2 mode, or using frequency converters. A variable-speed controller is essential in positioning drives.

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Origin of photo material: Meyer Werft

Technical specifications

Output range: 500 – 5,000 kWVoltage range: 400 – 11,000 VSpeed range: 900 – 1,800 rpmNumber of poles: 4, 6 or 8IP code: IP 54, IP 23

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VEM Combi Drive – the best of two worldsVEM drive motors as “Combi Drives” at 2.75 MW and 3.3MW comprise another successful VEM motor series. Wedeveloped this innovative drive concept – a symbiosis between compact pod design and robust standard motorengineering – together with SCHOTTEL, a rudder propellerand propulsion unit specialist. Using 3D CAD systemsthroughout the design phase, we are able to monitor themechanical implementation and construction of the ma-chine without interruption to ensure optimised productionprocesses.

We built the motor for vertical integration with water-jacketcooling into the support tube of the steering propeller. Thismethod makes optimal use of structural volume, which requires a sophisticated design also necessary for ventilatingand cooling the drive. The complex bearings and the specialgearbox lubrication system ensure very high durability in ourCombi Drives. We also put a lot of effort into testing theseals on the machine cooling and bearing lubrication systems to ensure high availability. Eliminating the above-water gearbox increases efficiency in the drive motor.

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Technical specification

Output range: 2,750 – 3,300 kWVoltage range: 675 VSpeed range: 750 – 800 rpmNumber of poles: 8IP code: IP 54

Benefits of the drive concept at a glance

☐ Extremely compact unit with an integrated drive motor☐ Minimised installation costs at the shipyard☐ Increased efficiency by eliminating the above-water gearbox☐ External test-bed testing before installation available on request☐ Ease of access after installation

VEM asynchronous propulsion units – high availability is the keyLarge slow-speed asynchronous drives are becoming increasingly common in modern diesel-electric vessels. As you wouldexpect, we also have these motors “on board”, which we mainly supply as welded versions and in various designs in combination with friction bearings for low noise and vibration. These motors can be configured for operation using medium-voltage converters or low-voltage converters using up to four separate winding systems in higher output ranges.

Our asynchronous machines are equipped with robust rotor winding designs that ensure not only high availability, but alsoefficient operation. State-of-the-art PWM converters in low and medium-voltage versions allow variable-speed operation.

Possible drive versions at a glance:☐ Soft-start up to highest performance☐ Operation using PWM converters, some using multiple winding systems☐ Tandem operation using direct and controlled drive

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Technical specifications

Output range: 500 – 15,000 kWVoltage range: 400 – 11,000 V for direct drive

500 – 6,600 V for converter operationSpeed range: 125 – 1,800 rpmNumber of poles: 4 – 16

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Origin of photo material:Siemens Norwegen Project “Bourbon Orca”

VEM synchronous propulsion units – all-purpose drives in the high torque rangeSynchronous motors are used as standard drives especially where high torque is required in electric drive systems onmarine vessels. These drives are equipped with two separate winding systems, and are designed for operation using medium-voltage synchronous converters.

You will find our drives on vessels such as mega-yachts, which require absolutely smooth drive operation; synchronouspropulsion units are also a good choice on cruise liners. The navy requires extremely high availability from their drive units,and also use our synchronous propulsion units. Low-speed machines with separate base frames that can be equippedwith additional custom vibration damping play a special role in our range. Our variable concept for welded housing designallows us to adjust the machine design according to installation requirements on board.

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Technical specifications

Output range: 5,000 – 30,000 kWVoltage range: 690 – 4,500 V for converter operationSpeed range: 120 – 200 rpm (1,200 rpm)Number of poles: 16 (6 to 24 available on request)

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VEM pod drives – efficiency and robust design and constructionThe VEM product range for modern marine propulsion systems includes pod drives. We equip these units with synchronousor asynchronous motors depending on the requirements and conditions of the vessel. The propulsion specialists at SCHOTTELdeveloped the Electric Propulsor (SEP) drive for asynchronous units, a unit that features zero maintenance and compactrotor design for economical pod-drive operation. The motor consists of a laminated package for the stator and rotor mountedin direct contact with the hollow shaft of the rotor or outer casing of the stator. Direct rotor cooling with seawater andcustom rod design in the rotor bars keep the motor operating efficiently.

SEP drives are equipped with a small internal air-cooling circuit that also provides heat to prevent condensation at idle.

Synchronous motors with brushless or permanent magnet excitation are used for higher output range applications; synchronous design easily allows greater air-gap widths as required due to the relatively large bearing clearances.The insulation system on the drive motors is designed for converter operation using low voltage in the lower output rangeand medium voltage in the higher output range. The preformed VPI-impregnated coils specifically developed for non-sinusoidal voltages combine mechanical rigidity with optimised and even temperature distribution within the winding.

Setting course for success with VEM EngineeringOur VEM Engineering ensures highly efficient production processes and an outstanding quality in our electric marine drives.Our know-how in drive development comes from decades of experience in the field, and is the key to our company’s success to the benefit of companies that own and equip seagoing vessels around the globe.

Our VEM motors meet today’s high demands on comfort in planning and implementing low-noise drives. Elastic installationsand sound attenuation are only two ways of meeting the stringent limits applicable to luxury yachts and cruise liners.

Companies across the world have been successfully setting for the high seas using shaft and diesel generators, pod drives,thrusters and propulsion units delivered by VEM.

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Technical specifications

Principle: Asynchronous, synchronous – brushlessOutput range: 2,000 – 7,500 kWVoltage range: 690 – 4,500 V for converter operationSpeed range: 120 – 250 rpm Number of poles: 4 – 24

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© 2016 arture graphic.design

VMUK_VM01-012-EN-08/16 Printed in Germany. Subject to change.

www.vem-group.com

Detailed informationon our website.

VEM Holding GmbHPirnaer Landstrasse 17601257 DresdenGermany

VEM SalesShipbuilding departmentPhone: +49 351 208-2060Fax: +49 351 208-3608E-mail: markula@vem-group.com

High voltage departmentPhone: +49 351 208-3237Fax: +49 351 208-1108E-mail: high-voltage@vem-group.com

Low voltage departmentPhone: + 49 3943 68-3127Fax: +49 3943 68-2440E-mail: low-voltage@vem-group.com

VEM ServicePhone: +49 351 208-3237Fax: +49 351 208-1108E-mail: service@vem-group.com