ELMA update July 2013

JULI 2013
update
NEWSLETTER FOR TRANSMISSION AND CONTROL TECHNOLOGY
Dear reader,
Innovation is high on Elma’s priority list; “
innovation in motion” is our slogan,
after all. Many people would even suggest
that innovation is one of the few ways in
which an organisation can be healthily
Integrated Direct
Drive Motors
for winch drives
manoeuvred through the ever increasingly
changing balance of economic power.
Nobody could deny the importance of
innovation for a knowledge-based
economy such as the Netherlands.
Following approximately 2 years of
intensive research, Elma has developed
a new type of motor, in collaboration with
various parties in the offshore and wind
energy sectors. The area of application is
mainly in highly dynamic drive lines,
including “heave compensation” in offshore installations, for example. Issues
About 15 years ago, the wind turbine industry began to develop integrated Direct Drive
for which there was previously only
generators for wind turbines. This choice was particularly based on the desire
solved electrically. The motor is based
a hydraulic solution can now also be
on technology which has already been
to overcome problems with the reduction gearbox (load gear) and to render the
applied successfully for many years in
system more reliable. Nowadays, the Direct Drive wind turbines are a familiar sight
the direct drive generators of the wind
turbines. The motors will be marketed
by Radius BV, in which Elma BV
at both onshore and offshore locations.
participates.
I wish you great innovation.
The philosophy behind the development of Direct Drive
generators can also be applied to other industrial drives. Thanks to the wide range of options for load gears and
electric motors from stock, designers can simply meet their
turnkey drive requirements. However, Direct Drive Motors
of the type used in wind turbines are not available on
the market.
Great dynamics
So what may be the added value of these Direct Drive
Motors for industrial applications? Teunis van Vulpen,
technical manager at Elma: “In certain applications, where
we are dealing with great dynamics, such as the so-called
De Fox
van fabrikant TER
‘heave compensation systems’ in the offshore industry,
these integrated Direct Drive Motors offer the advantage of
an extremely low inertia. This is because they work without a load gear, enabling them to readily change rotational
direction, or accelerate.”
Integration
Elma BV is one of the parties behind Radius, a company
responsible for implementation of the Integrated Direct Drive
Motors. This “integration” means that the motor uses the
same bearing as in the application, which is comparable
with the use of a wind turbine in which the stator and rotor
continue on page 2 >>
of the motor are integrated with
Sleepring lichamen
van Kraus
Elma op de TOC
Dick Varel
General Manager
ELMA STANDS FOR...
Motorweekend
Elma
Control technology
Power transmission
Industrial Automation
Repairs/Overhaul
Service and Maintenance
Elma verricht service
aan attracties
>> continued from page 1
the hub bearing. Teunis van Vulpen: “We
can supply the motor with a choice of
bearings, designed specifically for the
application in hand. An integrated direct
drive system has less components, is
easier to install and maintain, and gives
greater reliability.”
Radius
Radius will be aiming at implementation
of electric motors in the higher torque
segment. The torque range covered, runs
from 200 kNm to 5MNm. This range is a
supplement to the line of Siemens motors,
which ends where we begin. The difference, however, is the choice of the bearing
for the purpose of integration in the general
application.
Fail-safe
Radius is already in contact with various
potential clients. Winch manufacturers
seem to be truly interested in these types
of drives. A system can be simply and
quickly compiled, with the rotor attached
to the winch drum and the stator to the
winch frame. Dynamic braking of the winch
takes place via controlled short-circuiting
and is fail-safe, even in the event of total
power failure.
New developments
Determining factors for the motor torque
created are the motor radius and the axial
length of the motor, i.e. its volume. Generally speaking, we can generate around
100kNm torque per m3 motor volume. The company, Radius, is named after the
fact that the torque increases exponentially
in relation to the motor radius.
Dick Varel, general manager at Elma:
“Our targets for 2013 are to consolidate
our initial contracts, continue to design
and construct the motors and to gain all
relevant approval and certificates before
we can launch the concept on a larger
scale. All the new developments will require us to undertake a learning curve, but
we are convinced that we shall be able to
limit this period as far as possible, thanks
to the support received from wind turbine
designers, among other people.”
Watch this space...
De Fox
made by TER
The Fox, made by the TER manufacturer, is a worm gear end switch used,
for example, to measure the movement of industrial machines by means
of the rotation angle and/or the number of drive shaft rotations. Think in
terms of the angle displacement of the hub of a wind turbine or the number
of rotations of a winch drum, etc.
The gear ratio varies between 1:15 and
1:800, depending on the client’s requirements. The switching point of the contacts
can be very accurately set thanks to the
adjusting screws and the micro switches
used in the Fox are suitable for safety
functions. A maximum of 4 micro switches
and maximum 2 potentiometers or encoders can be integrated in the housing.
The Fox is fitted to a rotating part of the
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update | juli 2013
system, which transfers the movement
via a worm wheel and gears to the cams
and the other equipment incorporated in
the Fox.
The Fox can also be fitted with a flange,
for direct coupling to a motor, for example.
The drive shafts in the Fox are made from
stainless steel, the worm wheel rotates on
ball bearings and the gears are made from
a self-lubricating techno-polymer.
All techno-polymers used for the housing
are wear resistant, and protect the equipment against water and dirt. The ambient
temperature is between -40°C and +80°C
and the level of protection is IP 67.
For more information, please check the
Elma website: www.elmabv.nl
update
Kraus slip rings
Kraus Elektrotechniek is a renowned manufacturer of slip rings, represented
in the Netherlands by Elma. A slip ring is essential in installations in
which the power supply, control circuit signals or data must be transmitted
from a static location to a rotating location.
Kraus has a wide range of standard slip
rings for many different applications. The
standard slip rings can also be tailored to
meet your specific requirements. Thanks
to continuous innovation and technological
developments, Kraus manufactures slip
rings which comply with state-of-the-art
technology and the client’s wishes.
Due to the great flexibility of the engineering departments at both Elma and Kraus,
it is possible to quickly offer an optimum
solution for your application.
The slip rings are used in the following
installations, for example:
•Mobile cranes
•Excavators
•Tower cranes
•Sewage water purification plants
•Printing presses
•Robotics
•Production machines
•Wind turbines
•Ships’ cranes
•Revolving doors
Technical data
•Rotation speeds up to 2,300 rpm
•Currents from mA levels up to 5000 A.
•Voltages from mV levels up to 16kv.
•Suitable for telephone connections, data
transfer as well as for control circuits
•Encapsulated and non-encapsulated
slip rings, IP 67.
•Transfer of video signal
•Fibre optic slip rings
•Contact free transmission systems
for data
•Explosion-proof slip rings according
to II 2D IP65 T90 ° C
and II 3D IP65 T90 ° C
Elma at the TOC
Following a couple of years’ absence from the TOC, a trade fair
for the harbour transshipment sector, Elma was well and truly
present again this year.
At the show, Elma paid plenty of attention to joysticks, operator consoles, resistors,
radiographic controls, load measuring installations, slip rings and general crane
modernisation.
Meccano crane
There was particular interest in the Spohn & Burkhardt joysticks and operator consoles,
which was also certainly due to the Lemniscaat Meccano crane which really lived up
to its reputation as an eye catcher. The Meccano crane, whose movements (raising
and lowering, opening and closing of the grab, luffing and turning) was controlled
from an operator console, was made available to us by the Meccano club.
The following trade fair at which you can visit the Elma stand is the
Europort 2013, from 5 to 8 November, in Rotterdam.
Motorcycling
weekend Elma
A number of Elma motorcycling fans spent the weekend of June 6th
to 9th in the German Eiffel area, in order to tour this motorcycling
paradise.
The final destination, in the heart of the
Eiffel, the Bikers’ monument in Daun,
turned out to be further away than
initially assumed. On the way there,
Dick Varel’s chopper broke down before
even leaving the Netherlands. Although
Elma as a company is known for its
specialisation in electric drive technology, there was also plenty of knowhow of combustion engines. Once the
engine had been taken apart, the fuel
pump repaired and reassembled, the
trip could be continued.
Replace a capacitor
On day two, Mike Klasens’ chopper
gave up the ghost shortly after the start.
Once again, the riders joined forces to
replace a capacitor for the ignition this
time around, so that the Elma Motor
club could enjoy a sun-drenched road
trip in the Eiffel. The “adventurous”
weekend was concluded with a fun
barbecue.
elma
update | juli 2013
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update
Elma services
attractions
Oud Valkeveen is an adventure park in the Dutch municipality
of Naarden in the Noord-Holland province. The park is located
in the Valkeveen neighbourhood, to the extreme north of
the Utrechtse Heuvelrug region.
The country estate which is home to
Oud Valkeveen was formerly known as
“Oud Naarden” and was owned by a rich
resident of Amsterdam who purchased
it and had a farm built and named
Valkeveen.
Zuiderzee
After 1880, a steam tram connection was
built between Amsterdam and the Gooi
area, and was a popular way of visiting
the country estate for a day out, which
included the beautiful beach on the
Zuiderzee. In order to cater for all these
visitors, the owners of the country estate
farm established a pancake restaurant in
the farm.
In- and outdoor playground
In 1930, a playground was added adjacent
to the pancake restaurant. By now, the
playground has grown to become a large
indoor and outdoor adventure park
featuring many attractions, such as: Swing
ship, Beehive merry-go-round, Freefall
tower, Dodgems, Water bikes, Rollercoaster, Oldtimer track and many other
attractions, see www.oudvalkeveen.nl
Elma Projects
Last year, Elma BV was requested to
service the attractions at Oud Valkeveen.
Over the past months, the work conducted
has included replacement of control components, the adjustment and replacement
of frequency controllers, the replacement
of motors and the adaptation of operating
panels. Elma Project is specialised in the
design of drive and control units for mobile
attractions and playground attractions.
Such installations are designed and
commissioned according to the TÜV
requirements.
ELMA update is a publication
by ELMA bv
Sterrenbergweg 50
Postbus 65
3769 ZH Soesterberg
Telephone: +31 (0)346-356060
[email protected]
www.elmabv.nl
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ELMA update
are distributed among
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elma
update | juli 2013