ECHO YACHTs Trimaran 84 m STADT LEAN TECHNOLOGY
No-Loss AC Drives
Integrated Electric Propulsion Systems
The history of STADT
The STADT Group was founded by Hallvard L. Slettevoll
back in 1985. In December 2015- the 30th anniversary was celebrated. At the same time the group moved
in to the new and modern STADT Maritime Center in
Gjerdsvika. With a location in the middle of the maritime cluster on
the west coast of Norway, the aim has always been to
develop power inverters for ship applications. In 1997,
after several years of intensive developments, an innovative and very modern inverter series was launched. A
major advantage of these inverters, was the very compact design due to direct water cooling. The first STADT delivery went to the Norwegian coastguard K/V Tromsø. This was a breakthrough, and the
business improved rapidly. The main business area for the new inverters, made
in powers up to 3500 kW 690 V, was for diesel-electric
main propulsion of ships, as well as offshore applications on oil rigs and for industrial use. Companies like
TFDS - Hurtigruten, Geo Shipping, PGS, Sanco Shipping,
Aker, Statoil, Hydro, BP and Bayer AG became regular
customers.
In 2001 the water cooled STADT IGBT-converter business, based on PWM technology, was sold to ABB,
which incorporated them into their marine product
range.
After 2001 - STADT has been working with
dev­elopment of the 5. generation AC drives, the STADT
NO-LOSS drives. This new no loss technology is based
on sinus control and developed upon a lean perspective. It was patented in 2008, and launched to the first
ship applications the same year. The new drive technology has been awarded several times for its unique
characteristics, and many ships are now sailing with the
No-Loss technology all over the world.
STADT - Awarded Technology leader
Long experience from development of motordrives has
resulted in the patented STADT technology. This has
huge advantages compared to traditional PWM-technology, since it is free from electric disturbances. The
STADT NO-LOSS is also a very efficient power drive system with only 6 % electric system losses, including the
losses in generator and electric propulsion motor.
2015
The STADT Maritime Center in Gjerdsvika.
STADT NO-LOSS drives
Patented Lean Technology
STADT
AC DRIVE
No Trafo
No THD
No - Loss
No Filter
No EMC Superior technology with Stealth performance
The STADT NO-LOSS drive provides sinusoidal voltage and current to the electric motor and back to the
main switchboard. This gives very low harmonic disturbances in main switchboard and motor.
A sustainable lean solution, because:
Reduced fuel consumption, by up to 60 %
Reduced electric losses in systems, only 6 %
Reduced NOx, SOx and CO2 emission
Reduced maintenance and high redundancy
MTBF: 7 Years, MTTR: 2 Hours
Reduced noise and no EMC – a Stealth solution
Highly reliable, compact system, no transformers needed
Estimated lifetime: >25 years
The STADT NO-LOSS can be delivered up to 80 MW in voltages
up to 15 kV. Combined with CP propellers, it assures the highest
maneuverability for the ship.
THE DIFFERENCE IN
DRIVE TECHNOLOGY:
PWM
Sine wave
PWM creates EMC
Sine wave is noise free
Todays Electric Ship Technologies
How Efficient, Reliable, Predictable and Sustainable are they?
Evaluation of Different Drive Solutions
Issues to consider
STADT NO LOSS
12 Pulse
AFE
LLC
Technology in AC drive
Sine Wave
PWM
PWM
PWM
0
4
4 or 5
4
No
6%
6%
6%
Air is sufficient
Water
Water
Water
No
Yes
No/Yes
Yes
Standard
Special
Special
Special
Harmonic Distortion (THD)
No
High
High
High
Electromagnetic Interference
No
High
High
High
Acoustic Switching Noise
No
Yes
Yes
Yes
Screened Power Cables
No
Yes
Yes
Yes
Depending on Harmonic Filters
No
Yes
Yes
Yes
Designed Economic Lifetime
25 Years
10 Years
10 Years
10 Years
Maintenance Requirement
Very Low
Frequent
Frequent
Frequent
Onboard Crew Skills
Ordinary
Special
Special
Special
MTBF
7 Years
1 Year
1 Year
1 Year
MTTR
1 Hour
1 Week
1 Week
1 Week
Yes
No
No
No
Weight of Drive System
100 %
1400 %
600 %
1100 %
Size of Drive System
100 %
600 %
450 %
500 %
All Voltage Class (220V-15kV)
Yes
No
No
No
Power Scalable
Yes
No
No
No
Regenerates Power to Grid
Yes
No
Yes
No
No. of Power Components in Line
1
80 000
150 000
80 000
Capacitors In Main Power Circuit
No
Yes
Yes
Yes
Explosion Risk in Drive
No
Yes
Yes
Yes
Propeller Pitch Configuration
CP
CP or FP
CP or FP
CP or FP
Very Low
High
High
High
No. of electric energy transformations
Power Train Losses
Cooling Type
Power Transformers Needed
Redundant Power Units
Spares Globally Available
Financial Risk (Service cost, Off-hire)
STADT
STASCHO
STADT
NO-LOSS
DRIVES
Services:
STADT
MOTORS
STADT AC
AC MOTORS
• Engineering
• Manufacturing
• Commissioning
• Global Services
STADT
MSBMV
MV
& LV
LV
STADT MSB
and
Solutions:
• LNG - electric
• Diesel - electric
STADT
STADTTRANSFORMERS
TRANSFORMERS
• Hybrid - electric
• Battery - electric
POWER
POWERMANAGEMENT
MANAGEMENT
STEALTH NO-LOSS AC drives
for the full electric warship
No electromagnetic interference, EMI, due to sine wave operation
No harmonic voltage distortion, THD, on the ship
No transformers for the propulsion are needed
No electric losses in the drives at normal operation ( BP )
High redundancy in all levels of the drive systems
Major reduction of space and weight for the drives
Minimal need for cooling of drives and its systems
No need for screened power cables and cable segregation
Rugged and very well proven technologies.
MTBF and lifetime improved dramatically compared to competitors
Simplified technology , 80 % reduction in number of components
• Sustainability • Reliability • Partnership
STADT AS
Molovegen 2 | N-6083 Gjerdsvika | NORWAY
Tel.: +47 700 25 800 | www.stadt.no