Derived Ships Service
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- Newport News Pursues The Electric Drive Maritime Reporter, Sep 1994 #72
Newport News Shipbuilding (NNS), with its partner Kaman Electromagnetics Corporation, has developed and patented an Integrated Power System (IPS), an electric drive system technology NNS says offers multiple benefits for both commercial and military ships.
Among those touted benefits are significantly less total system weight and volume; flexible arrangement options; module commonality among ship classes; reduced spare requirements; improved construction efficiencies; standard machinery controls; zonal electrical distribution for ship services; heater machinery component reliability; simplified logistics support; and increased compliance with the environmental requirements for reduced emissions. All of this, according to NNS, leads to reduced acquisition and life-cycle costs.
The Navy estimates a 40,000-hp electric drive propulsion package is less than one-third the volume of the diesel equivalent. That greater flexibility of arrangement options is enhanced by the fact that the prime mover need not be directly attached to the propulsion shaft.
The Navy also says the 40,000-hp electric drive is less than one quarter the weight of a diesel with the same power.
According to NNS, engineering case studies comparing IPS to other propulsion systems estimate anywhere from $2 million (for an LNG carrier) to $29 million (for a military vessel) in acquisition cost savings from the new technology, and between $1 million and $4 million annually in life-cycle costs.
The System NNS's Integrated Power System is configured as follows: compact permanent magnet generators produce high-frequency AC power that is converted to DC power by modular rectifiers located at the generator.
That DC power is then distributed by bus duct to the propulsion motor inverters located on the motors.
DC power is also distributed to the ships service system by two bus ducts that run the length of the ship. Vital ships service loads are powered from both buses through electronic transfer devices. Inverters located at the load convert the DC power to whatever type and quality AC power is required. The rectifier and inverters also provide circuit protection, eliminating the need for mechanical circuit breakers at their locations.
When used to supply dedicated loads, the inverters incorporate the functions of variable speed motor controllers and circuit breakers, thereby eliminating these components.
One prime mover develops power for both ships service and ship pro- pulsion, using the same basic control and distribution system, reducing the number of prime power sources on a ship.
Making the pursuit of this technology feasible were certain recent advances in solid-state electronics and permanent magnet technology.
NNS says that by developing highperformance electrical hardware — high-power density motors, generators, inverters, rectifiers, controls and distribution systems — they are making the theoretical technology real. NNS has renamed these sets of hardware, now calling them power generation modules, propulsion motor modules and electric power transmission distribution conversion modules.
The modules are common across ship classes; specific ship service requirements are met by installing a varying number of given function modules — eliminating the need for separate ships service generators and auxiliary systems.
Permanent Magnet Generator Under contract to the U.S. Navy, the NNS/KEC team is developing an IPS permanent magnet generator which will be directly shafted to the prime mover using high-strength permanent magnets and high rotation speed. The generator is configured as a radial cup with the rotor outside the stator, and with the permanent magnets attached to the inside of the cup. Propulsion-derived ships service power is obtained from the common high frequency generator that also supplies electric drive propulsion.
Direct Current Zonal Power Distribution DC power distribution became feasible with the development of the Insulated Gate Bipolar Transistor (IGBT), which can switch high levels of power at high speed, permitting the use of pulse-width modulation to invert DC power to the type of high-quality AC power desired. The same inverter module can produce whatever type of power output is required, simply by changing the software.
Propulsion Motor The electric propulsion motor is an axial gap, permanent magnet design that employs pulse-width modulated inverters to control the wave shape of the stator current.
Both the generator and the propulsion motor use the same permanent magnet material — neodymiumiron- boron.
The Time Frame Tests have been conducted on 20, 100-, and 700-hpprototypes. A3,000- hp scaled prototype of a 25,000-hp motor is scheduled for testing this year. The final phase of the development project will be to build and test the full-scale motor.
NNS says that its current prototype development of the IPS system will allow full-scale installation in both military and commercial surface ships by 1998.
For more information on NNS Circle 78 on Reader Service Card
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March 2024 - Marine Technology Reporter page: 48Index page MTR MarApr2024:MTR Layouts 4/4/2024 3:19 PM Page 1 Advertiser Index PageCompany Website Phone# 17 . . . . .Airmar Technology Corporation . . . . . . . . . .www.airmar.com . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(603) 673-9570 9 . . . . . .Birns, Inc. . . . . . . . . . .
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March 2024 - Marine Technology Reporter page: 45ronments. The new agreement will address speci? c techni- cal gaps in the UUV defense and offshore energy markets especially for long duration, multi-payload mission opera- tions where communications are often denied or restricted. As part of the new alliance, Metron’s Resilient Mission Autonomy portfolio
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March 2024 - Marine Technology Reporter page: 36LANDER LAB #10 Of special interest for marine applications, LiPo batteries are Shipping any kind of lithium battery can be a challenge, and offered in a “pouch” design, with a soft, ? at body. The pouch IATA regs vary with the batteries inside or outside an instru- is vacuum-sealed, with all voids ?
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March 2024 - Marine Technology Reporter page: 11assist in identifying mines and act as a neutralization device. About the Author Bottom mines pose even greater chal- David R. Strachan is a defense analyst and founder of lenges. Unlike contact mines, bottom Strikepod Systems, a research and strategic advisory mines utilize a range of sensors to
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March 2024 - Marine Technology Reporter page: 9from marinas along the western coast. The exact number of lizing laser detection systems can detect mines just below the mines, as well as their locations, remains largely a mystery, surface, even those hiding in murky water. The Airborne Laser although reports suggest that over three hundred have been
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March 2024 - Marine Technology Reporter page: 7Set a Course for your Career Become a NOAA professional mariner! Sail with NOAA’s fleet of research marinerhiring.noaa.gov 1-833-SAIL-USA (724-5872) and survey ships! - Detects all iron and steel Get your next salvage - Locate pipelines, anchors and job done faster chains with a JW Fishers
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March 2024 - Marine Technology Reporter page: 6MTR Editorial Advisors Gallaudet Hardy The Honorable Tim Gallaudet, Kevin Hardy is President PhD, Rear Admiral, U.S. of Global Ocean Design, Navy (ret) is the CEO of creating components and Ocean STL Consulting and subsystems for unmanned host of The American Blue vehicles, following a career
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March 2024 - Marine Technology Reporter page: 4Editorial NIWA-Nippon Foundation TESMaP/ Rebekah Parsons-King www.marinetechnologynews.com ast month marked the resounding NEW YORK 118 E. 25th St., New York, NY 10010 return of Oceanology Interna- Tel: (212) 477-6700; Fax: (212) 254-6271 tional in London, perennially one Lof the world’s most important
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April 2024 - Maritime Reporter and Engineering News page: 3rd CoverYour Specialist Ofshore Lubricant Partner T Togeth her w we go o furt ther r Our commitment to customer service and technical support extends to ofshore operations. With our robust global supply chain, we deliver the optimal marine lubrication solution to your ?eet, precisely when and where it’s needed.
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April 2024 - Maritime Reporter and Engineering News page: 48Index page MR Apr2024:MN INDEX PAGE 4/5/2024 1:33 PM Page 1 ANCHORS & CHAINS MILITARY SONAR SYSTEMS tel:+44 (0) 1752 723330, [email protected] , www.siliconsensing.com Anchor Marine & Supply, INC., 6545 Lindbergh Houston, Massa Products Corporation, 280 Lincoln Street, SONAR TRANSDUCERS
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April 2024 - Maritime Reporter and Engineering News page: 47MARKETPLACE Products & Services www.MaritimeEquipment.com Powering the fleet for 60 years! HYDRAULIC NOISE, SHOCK AND VIBRATION SUPPRESSOR Noise, Shock, VibraO on & PulsaO on in Quiet, Smooth Flow Out Oil Bladder Nitrogen (blue) Manufactured by MER
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April 2024 - Maritime Reporter and Engineering News page: 46MARKETPLACE Professional www.MaritimeProfessional.com GILBERT ASSOCIATES, INC.GILBERT ASSOCIATES, INC. Naval Architects and Marine Engineers SHIP DESIGN & ENGINEERING SERVICES Join the industry’s #1 Linkedin group )NNOVATION
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April 2024 - Maritime Reporter and Engineering News page: 43“The industry is an ecosystem which includes owners, managers, mariners, shipyards, equipment makers, designers, research institutes and class societies: all of them are crucial,” – Eero Lehtovaara, Head of Regulatory & Public Affairs, ABB Marine & Ports All images courtesy ABB Marine and Ports provi
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April 2024 - Maritime Reporter and Engineering News page: 42OPINION: The Final Word Seeing the Ship as a System Shipping must engage with the decarbonization realities that lie ahead by changing the way it crafts maritime legislation to re? ect its place in the interconnected, interdependent world economy, said Eero Lehtovaara, ABB Marine & Ports. ABB Marine &
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April 2024 - Maritime Reporter and Engineering News page: 41Nautel provides innovative, industry-leading solutions speci? cally designed for use in harsh maritime environments: • GMDSS/NAVTEX/NAVDAT coastal surveillance and transmission systems • Offshore NDB non-directional radio beacon systems for oil platform, support vessel & wind farm applications
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April 2024 - Maritime Reporter and Engineering News page: 40TECH FEATURE SITUATIONAL AWARENESS SITUATIONAL AWARENESS SYSTEM BATTLES COGNITIVE FATIGUE IN WATCHKEEPERS All images courtesy Groke Technologies Today’s evolving maritime security risks pose all-too-familiar threats to international shipping, and as just one of the many causes of fatigue, they add
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April 2024 - Maritime Reporter and Engineering News page: 39Tech Files Latest Products, Systems and Ship Designs “Wall Climbing Robot” Danish Pilot calls gets ClassNK Nod LEGO Model "A tribute build to a work life at sea" Image courtesy MOL, Sumitomo Heavy Industries lassNK granted its Innovation Endorse- Image courtesy Espen Andersen/DanPilot ment for
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April 2024 - Maritime Reporter and Engineering News page: 38Tech Files Latest Products, Systems and Ship Designs Zero-Emission Mooring Service of a Tanker Consulmar achieved a milestone by executing what it calls ing boat Castalia, which operates on full electric propulsion. the world's ? rst zero-emissions mooring service for a tanker. Equipped with two 150 kW
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April 2024 - Maritime Reporter and Engineering News page: 37SIMULATION "A simulated vessel ? ooding can help teams work together to solve the challenge using different systems on the bridge." – Jussi Siltanen, Lead, "The gami? cation of Product Marketing, learning makes it fun." Safety Solutions at NAPA – Captain Pradeep Chawla, Founder, MarinePALS Image
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April 2024 - Maritime Reporter and Engineering News page: 35SIMULATION e have a close relationship with tech- Realism is prized beyond immersive, photo-realistic visu- nology, evidenced by, for example, als, and providers are introducing increasingly accurate func- the phones we are estimated to un- tionality. FORCE Technology’s upcoming DEN-Mark2 math- lock around
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April 2024 - Maritime Reporter and Engineering News page: 34FEATURE Image courtesy Kongsberg Digital Simulators Track our Changing Relationship with Technology Simulation-based training has its whole-of-ship/ whole-of-team scenarios, but zooming in, the industry is now working on more speci? c targets. By Wendy Laursen Image above: Kongsberg Digital has integrated
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April 2024 - Maritime Reporter and Engineering News page: 29RADM PHILIP SOBECK, MILITARY SEALIFT COMMAND U.S. Navy photo by Bill Mesta/released U.S. Navy photo by Ryan Carter Rear Adm. Philip Sobeck, Commander, United States Navy’s Military Sealift Command, visits USNS Patuxent (T-AO 201) for a tour of the ship at Naval Station Norfolk, Va., November 20, 2023.
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April 2024 - Maritime Reporter and Engineering News page: 28FEATURE INTERVIEW track missiles and warheads for the Mis- sile Defense Agency, and it travels with its support ship, the MV Hercules. For our Service Support ships, we have the two hospital ships, USNS Mer- cy and Comfort; two rescue and salvage ships; two submarine tenders; and the Sixth Fleet ?
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April 2024 - Maritime Reporter and Engineering News page: 27RADM PHILIP SOBECK, MILITARY SEALIFT COMMAND With COVID, we had to make some hard choices for our Do your CIVMARs have upward mobility? mariners because we couldn’t rotate. Many of our mariners The Navy has Sailors who become “Mustangs,” and work found other employment, and were able to use their skills