maxon
set its sights high when developing the new 30 mm diameter power motor, focusing
clearly on customer orientation. At 200 watt output power, the EC-powermax is
one of the best drives available today in the international drive sector. The
new optimized maxon winding technology gives it exceptional performance
benefits. The stator is grooveless which means there is no detent, providing
excellent control characteristics, particularly for positioning
operations. It is also much quieter in the upper speed range, as there is
less mechanical vibration.
The
4-pole rotor is fitted with the best available magnetic material, with the
magnetic field scanned for electronic commutation. The motor design has been
kept deliberately robust and promises to be highly reliable, even for the
expected high currents. The increase in the motor’s characteristics which
define a motor’s output capacity is 5.7 min-1mNm-1, i.e.
four times better than the comparable 2-pole version.
The
motor can be combined in the modular system with 42 mm planetary gearheads,
digital encoders up to 1,000 pulse and brakes. The drives form a high-powered
drive system in combination with electronic maxon controls type DES or a modern
positioning system.
maxon
motor has developed a new range of intelligent positioning controllers known as
EPOS. Small and compact, they feature the very latest technology and come at an
attractive price.
The
controllers are currently available in three versions: a power-version at 70V
and 10A continuous current, a midi-version at 24V and 5A continuous current, and
a micro-version at 24V and 1A, which means that highly dynamic precision drives
and control systems can now be realized in the minutest dimensions. Several
drives can be networked and coordinated through a standardized CANopen interface
and the controllers operate in position, speed or current control mode.
The
controller is commanded via the CANopen interface or alternatively via RS232.
Electronically or mechanically commutated motors can be driven. A sinusoidal
commutation of current and space vector modulation (SVM) is being used for
brushless EC motors. This not only improves motor efficiency, but minimizes
moment ripple and noise. The algorithms run on a fast signal processor and
built-in chokes ensure smoothness of operation, even for low-impedance motors.
The two EPOS have free digital as well as analog inputs and digital outputs for
connecting peripheral drive equipment, limit switches etc.
A
Windows® based user interface is available for configuring, setting up and
autotuning control parameters. It is supplied together with comprehensive
operating instructions on a CD. The CD also contains various software examples
and libraries for network operation with PC or SPS and CANopen. The operating
instructions and software can be downloaded free of charge from maxon’s
homepage.
EC
max - Brushless DC motors
maxon
EC-max motors are electronically commutated DC motors. Designed as internal
motors, their shafts turn with no detent thanks to an ironless winding. The
worldwide patented winding, System maxon, offers even more benefits, such as
high dynamism, low inductance, high efficiency and extreme reliability.
This
robust product family features five motor sizes with diameters of 16, 22, 30, 35
and 40 mm. Each motor type is available in two lengths, a short or a long one
which is almost twice as powerful. The motor can be combined with a gearhead,
encoder and/or brakes depending on the application. Given that motors have
several types of winding, gearheads have several reduction ratios and encoders
have a wide range of pulses, the variety of combinations is an astonishing
10,000 or more.
The
largely automated production process has improved throughput times, flexibility,
quality but crucially the cost of the new maxon EC-max program.
A
number of innovations have been implemented during the two-year development
period, such as a stainless steel motor housing.
Together
with the metal flanges, the motors provide a high degree of temperature
stability, good heat elimination and shielding against electrical fields. The
non-tension motor cables – another example of innovation – ensure maximum
flexibility for mounting the motor, as they can be directed away both radially
and axially, and also fitted with almost any type of plug.
EC-max combined with Gearhead,
Brakes & Encoders
versions of the EC-max product family 16 - 40 mm dia
6 mm diameter motor — the world‘s smallest EC motor with Hall sensors
The 1999 maxon launched the world’s smallest electronically commutated DC motor with
Hall sensors (magnetic switches). The outer diameter of this tiny little thing, weighing a mere 2.8g, is only 6mm and it turns at
up to 100,000 revolutions per minute. It is truly a great leap forward in the development of
micromotors.
| Its crucial significance lies in the fact that it can do much more than simply overcome
internal losses. Its 1.2 watt assigned power rating is higher than larger motors. Proof of its effective design is the way it
remains at a low temperature. At a no load speed of 80'000 rpm, the motor reaches a housing temperature of only 52°C. High and
constant performance can be achieved at up to the maximum permitted temperature of 125°C. |
Flexible use
A flex print is used rather than cable or terminal so that the connection arrangements
are simple and secure. The Hall sensors supply information on rotor position and help the drive achieve precision and a secure
start-up response.
The nominal voltage is 9 volt DC. The operating voltage varies within a wide range which is a characteristic
advantage of DC motors. The maximum continuous current is 500 mA and maximum continuous torque 0.260 mNm. A range of 6mm
diameter planetary gearheads is in preparation for applications requiring a higher torque at a lower speed. Suitable electronics
are also available.
Wide-ranging applications
One particular field of application for the 6 mm motor is medical technology, such as infusion pumps or
endoscopy. Other applications include aeronautics and complex production installations for the semi-conductor industry.
Precision
knows no boundaries- the world’s first positioning unit – even smaller than
an AAA battery
This
micro technical drive system comprising a brushless 6 mm EC motor, magnetic
encoder and backlash free harmonic drive gearhead is a milestone in terms of
moving miniature components.
Supplying a constant 1.2 Watt, the motor measures
6 mm in diameter and the gearhead 8 mm.
The backlash free gearhead
with a 1:160 reduction ratio and high-resolution 100 incremental encoder . The
positioning unit’s shaft is hollow
and the drill hole
diameter 0.65 mm.
The
electronically commutated DC motor features the patented maxon winding, and weighing a
mere 2.8 g, can turn at up to 100 000 rpm.
The key aspect is that the motor can do more than merely overcome the
internal losses, and
at 1.2 Watt output power, it even beats larger types.
New 8 mm brushed Dc motor
launched
The new
DC motor RE 8 from maxon is the company’s response to the worldwide demand for
smaller and smaller drives. Only 8 mm in diameter, 16 mm long and weighing less than 4 grams, it is
capable of delivering a nominal 0.5 Watt. The motor
shaft is as thin as pencil lead at only 0.8 mm in diameter and turns in two
sleeve bearings. The shaft is ceramic and in some ways superior to a steel one, as its
electrical insulating properties allow for a very compact Precious metal
brushes also ensure constant and low contact resistance between brushes and
commutator, even after a prolonged standstill. The ‘heart’ of the motor is the worldwide patented ironless rotor. The
lightweight rotor has very specific advantages, such as particularly low
mass inertia and very fast acceleration. There
is no magnetic detent at all and minimal electromagnetic interference.
Together with a neodymium permanent magnet which is one of the best magnetic
materials currently available, maxon’s ironless winding is much more efficient
than other motor designs, making this drive particularly suitable for
network-independent applications, such as lasers, levelling equipment or insulin
pumps. Planetary
gearheads can also be attached for certain applications where the given motor speed
is too high and torque too low. The modular
system can also provide a sensor for detecting speed and position
New Linear Servo
Controller LSC 30/2 added features at lower cost
The new maxon motor linear servo amplifier LSC 30/2 is a 4
quadrant servo amplifier that offers the ultimate in versatility , five
operating modes, several ways of setting the input value, but best of all these
features are offered in a package which costs an impressive 20% less than
competitive models.
The LSC 30/2 is so new that it could not be included in
the latest maxon catalogue , however it 's now available from ex stock ,
part no is 250521.
The five different operating modes available are IR
compensation, digital encoder control, DC tacho control, voltage regulator ,
each function is extremely easy to configure , thanks to convenient DIP
switches.
The set input can be set from an internal potentiometer
for fixed speed adjustment or use an external potentiometer to adjust
speed externally , input voltage can be from set to either +/- 3.9v or +/-
10v input for connection to a position controller.
A green and red LED shows the correct operation and fault
diagnostics.
Operating voltages range from 12 - 30 v DC at up to 2A .
The LSC 30/2 has been designed to give superb servo
control and flexibility for permanent magnet dc motors up to 50 W.
New 16 mm & 22 mm
brushless high-speed motors
This new 16 mm generation of electrically
commutated DC micromotors offers speeds up to 60,000 rpm with an output of 40W
The new EC16 motor developed
by maxon is a brushless DC motor. An outstanding characteristic is its power
density. At only 16 mm in diameter and a length of 56 mm this motor brings a
power rating of 40 Watt! The reasons for this improvement can be found, on one
hand, in the optimised winding technology – the consequence is less eddy
current losses. On the other hand the active parts, for example the magnet and
winding, take up a relatively large volume of the motor. Another advantage is
the high surface to volume relationship. The heat energy produced in the motor
can be distributed more efficiently.
The speed range of this fast running motor is
from 0 to 60,000 rpm. Lower speeds and a corresponding high torque can be
implemented with a planetary gear from the maxon modular system. Brushless
DC motors need the information of the actual rotor position for the electronic
commutation of the three phases. With the available motor, the proven concept to
separate the control magnet from the main magnet has been applied. Thus the Hall
sensors of the electronic commutation are protected against interference of the
magnet and the winding current. The
significant characteristics of this brushless DC motor with the best magnet
material available on the market today, Neodymium, are the small dimensions, the
extremely wide speed range, the high dynamics and specifically the unsurpassed
lifespan. Further advantages are high efficiency, no cogging, and the largely
linear speed/torque gradient which enables excellent control characteristics. These servo-drives are mainly used in medical and
dental technology, as well as in high speed construction tools and automation
systems.
The brushless 22 mm motor has an external diameter of only 22 mm and 62.5 mm long easily
reaches speeds of up to 50’000 rpm and has an output up to 50 Watts.
Using Neodymium, currently the best available magnetic material, the
DC motor's key features are its small dimensions, its extremely wide speed range, high dynamics and of course
its unrivalled durability.
Different motor versions are available with the maxon winding system and delta and Y circuitry. The speed
range is suitable for normal operation from 0 to 50,000 rpm and 41,300 rpm is already reached at 32 V.
Conversion to lower speeds and therefore higher torque is achieved through planetary gearhead attachments.
Other striking features are also the low terminal inductance (0.02 to 0.06 mH), high efficiency (up to 82%) and the absence of any
cogging.
|
|
Brushless DC motors require an indication of the actual rotor position for the electronic commutation of the
three phases. This motor uses the reliable method of separating the control magnet from the main magnet, therefore the Hall
sensors of the electronic commuta- tion are protected from the magnet's disturbing influences and the high winding currents.
Versions are available with Hall sensors, or so-called 2-wire versions.
maxon also offers the electronic commutations with integral speed control to suit the brushless
motors. They cover the required performance and wide voltage range of 12 to 50 V.
These servo-drives are used mainly in automation systems, aviation, medical technology and
mechanical engineering.
Technical Data:
Speed up to 50'000 rpm
Power rating 50 resp. 20 watts
2 lengths: 44.3 and 62.5 mm
Available in 3 versions:
with Hall effect sensors
sensorless
with integrated electronics
New: Integrated 1-Q Electronic Commutation in Hybrid Technology
maxon
motor
Flat Brushless Dc Motors
- external rotor design
maxon motor
high performance brushless dc motors with a wide range of power
outputs from 0.03 w to 90 w.and sizes from 6 mm to 90 mm dia The motors are
based on a flat (external rotor) design construction using Neodymium (NdFe)
magnets, giving a very high power to size ratio.
These flat motors are
particularly suitable for applications that require a motor with compact
construction with high power, linear speed characteristics, a long service life,
and low noise levels from a low cost motor.
Some of the advantages of maxon
motor flat brushless are
- Price
– a very
competitively price/performance ratio due to the constructional design and
automated production techniques used.
- Compact
Size – very short
overall length.
- High
Performance - Uses a
powerful RE magnet (NdFeB neodymium), for high power/size performance.
- Optional
feedback available -
through internal hall sensors, for velocity and low resolution encoding.
- Quiet
– low noise levels from using high precision pre loaded double ball
bearings.
- Long
Service Life –
life is virtually only limited only by normal ball bearing wear.
- Linear
Torque Characteristics
- because of the motors large torque radius, the motor has a high stall
torque giving the motor a very flat toque/speed gradient, ideal for
applications that require good speed stability.
- High
Efficiency – the
motor efficiency has been optimised for maximum efficiency in optimum
operating point for the motor.
Positioning Control Unit PCU2000
| Position, Speed, Process Control – PCU2000, the complete system from one
source – from the drive specialist maxon. The Positioning Control Unit PCU2000 represents, together with maxon
DC motors, a complete solution for precise positioning and controlled rotation for 1 or 2 axes.
The PCU2000 finds its applications in digitally controlled point-to-point movements and positioning
with automatic calculation of the path/time profile, as a highly accurate digitally adjustable speed control as well as a
mini-process and monitoring control.
|
 |
The PCU2000 offers, amongst other features, a completely wired concept, optimised for the
operation of individually selected maxon motors, a user friendly dialogue - ergonomic and easy to use software - and it
offers SPS/PLC functions for the control of logical processes.
The PCU 2000 is easily installed. All the connection cables are included. The control may be
integrated without any difficulties in existing systems. The software included allows easy programming of the PCU 2000, the
user is supported with many help functions. Through Teach-In, commands may be integrated directly in the program. The positioning
function may be printed and traceable optimised.
The PCU2000 may be used in standalone operation as an autonomous positioning control in a automation
plant. Of course it can also be used in on-line operation connected by standardised interfaces with master and subordinate
systems.
The PCU2000 complete solution offers during the design as well as in operation the important
advantage of conform components. Discussions about interfaces between drive and control can be omitted.
Mars Pathfinder Mission
The USA sent Pathfinder to Mars
November 1996 was the beginning of a new chapter in space history– and for maxon motor as well. Known as "Mission
Thumbnail", the USA, the world‘s leading space nation, sent a special module to the ‘Red‘ Planet.
The average speed of the seven-month flight was around 25,000 km/h. Aboard this module was a mini vehicle that was able to seek
out unknown terrain on the "Mars Pathfinder" project and carry out scientific and technological experiments.
With a budget of 171 million Dollars, the Mars-Mission was much less expensive than previous projects, one major reason being
the use of standard components
or modified ones.
maxon motor ag of Sachseln, Switzerland and its subsidiary maxon precision motors worked very closely with Jet Propulsion Labs
(JPL) to supply eleven RE 16 motors, 16 mm in diameter, to power this
vehicle, strikingly named the 'Sojourner' (in English: guest/temporary resident). Each of the six wheels requires one motor. Four
motors are to guide the vehicle and one is responsible for operating scientific apparatus.
maxon also makes a move on Mars!
The special "Pathfinder Project" landed on Mars on 4 July 1997. The 6-wheeled Mars vehicle was on board a
"Delta" rocket that took the most direct route to Mars, penetrating the atmosphere with a heat shield and landing with
the help of parachutes, rockets and airbags.
Nevertheless, the prevailing forces were ten times those of the Earth's gravitation. The flap opened and the Pathfinder
rolled out into the then vastly unexplored world of the Red Planet. From that moment, data began to be transmitted back to Earth,
most of which is documented visually and as data.
The signals actually required well over 10 minutes to complete their 'journey', most of the findings being documented visually
or as data. The Sojourner moved at an average speed of 36 cm/h and was able to drive over rocks up to 30 cm high, i.e. double the
height of its own wheels.
Nobody had dared hope that this mission would last for well over three months – it was originally expected to last for around
seven days, with the possibility of extending for a further period of several months, depending on external circumstances, such as
weather, surroundings etc.
There has been increased speculation recently on whether there is life on Mars. Is there water on the Red Planet, which is
essential for life? But the atmosphere is too thin. In 2005, a NASA mission will collect rock samples on Mars and bring them back
to Earth - and of course maxon motor will again be involved!
Some data on the "Sojourner" rover:
|
Weight: 11.5 kg |
|
 |
| Height open: 280 mm |
|
| Height for transport: 180 mm |
|
| Length: 630 mm |
|
| Width: 480 mm |
|
|
|
Drive Motors:
maxon DC motor REÆ16, precious metal brushes CLL,
nominal voltage 30 Volt
The maxon DC motors REÆ16 are high quality DC
motors equipped with Neodymium magnets. "Heart" of the motor is the world-wide patented ironless rotor, system maxon.
The CLL concept (Capacitor Long Life) increases the life expectancy of the motor.
|
efficiency up to 85% |
|
weighs only 38 g |
|
RE16 mm |
|
assigned power rating 2.5 Watt |
| length 41 mm |
|
highly reliable |
The motors which were modified for Sojourner are distinguished by specially lubricated ball bearings designed for temperatures
ranging from -80 up to +70oC.
4-Q EC Servoamplifier
Small, economically priced module for electronic commutated (brushless) DC motors with hall sensors and
mounted encoders.
Hard-wearing, long-life brushless motors are being increasingly used for high-quality industrial products.
However, even in very small brushless motors, the required control electronics are relatively expensive compared to the motor
itself and therefore restrict wide application. To solve this problem, maxon is now offering a rapidly expanding and extremely
competitive series of electronics modules which means that attractively-priced EC drives with power ranges of up to approx. 250W
are now possible. Another high-quality 4-quadrant servo-amplifier has now been added to this series.
This ultra-compact 4-Q EC servo-amplifier module is designed to control the speed of EC motors with Hall
sensors and incremental encoders. As the module is small, it can be screwed onto the electronics rack with the assembly flange or
directly onto the machine immediately next to the motor.
The module uses the motor’s Hall sensors to measure rotor position and thereby control the commutation of
the motor windings. An optical incremental encoder (e.g. 500 pulses per turn) fixed onto the motor shaft is used to measure speed,
and this precise and high resolving measurement produces dynamic drives that guarantee excellent performance, even at very low
speeds.
The servo-amplifier’s input voltage ranges from 12V to 50V and its continuous output current is 6A
maximum. However this can be restricted to a lower value for thermal motor protection through a built-in potentiometer or through
external voltage command. The required speed is determined by a pre-set value in the range of
+/- 10V. Reference voltages for directly connecting a potentiometer for speed adjustment are integral.
The amplifier is ready to use in no time at all as it is simple to assemble and easy to connect with
screw-type terminals. It is ideally tuned to the dynamic characteristics of maxon motors and can therefore be operated with
minimal tweaking.
If thermally overloaded during operation, the module cuts off automatically. The operating status can be
monitored via a digital signal from other control units.
The servo-amplifier fulfils the requirements of the European guidelines on electromagnetic compatibility
(EMC 89/336) and carries a CE marking.
150 Watt HIGH-POWER DC motor
40 mm
diameter
| This completely new DC servo-motor with maxon's ironless winding system provides
outstanding values in terms of performance, dynamics and installation size and is part of a modular system with planetary
gearheads and encoders. |
 |
The 150 Watt RE40 DC motor with an external diameter of 40 mm and
71 mm length is fitted with a
strong Neodymium magnet and maxon's ironless rotor system, that is now world famous thanks to the Mars mission. This DC motor is
exceptionally durable for mechanically commutated motors thanks to the very low inductance of maxon's ironless winding.
Other major benefits are maximum efficiency of up to 90%, detent-free operation, very low starting time constants of 4 ms and high
overload capacity.
3 different windings are already available so that the best match can be found for any particular application.
The motor is available in maxon's modular system with planetary gearhead and encoder. Preparations
are underway to combine it with a brake and for an 'industrial version' where all electrical terminals with cable screw
connections are fed into a terminal box. The unit therefore meets the requirements of protection class IP54.
These servo-drives are used mainly in automation systems, aviation, medical technology and mechanical
engineering.
Gearhead motor GM20
New compact gearhead motor for fine and exact rotational movement.
| The attraction of this small 20 mm gearhead motor lies in its dimensions and the
outstanding values it can provide thanks to maxon's ironless winding system. The drive is part of the modular system with a
magnetic encoder.
The attraction of this small 20 mm gearhead motor lies in its dimensions and the outstanding values it can
provide thanks to maxon's ironless winding system. The drive is part of the modular system with a magnetic encoder.
|
|
The GM20 Gearmotor with a permanent magnet provides top performance in every respect:
- small dimensions: diameter 20 mm, length 21 mm
- 1.2 Watt assigned power rating and speeds from 0 to 4700 rpm.
- Thanks to the maxon winding system, the rotor inertia is very low, the acceleration and efficiency
high and the drive free from cogging. Precious metal brushes and commutator ensure constant contact resistance and very low
starting voltages.
- The optional magnetic encoder is attached to the motor for
reliable protection against disturbing
influences. The magnetic rotor is firmly connected to the motor shaft.
13 mm in diameter, the magnetic encoder provides only 16 pulses per turn in order to recognise the
rotational direction on two channels. The output signals are TTL compatible.
The spur gearhead is integral to the motor, available in three reduction ratio variations from
2.57 to 55.1 : 1 and has an power output of up to 30 mNm.
Its use is very varied, ranging from mechanical equipment to medical technology. Its high efficiency makes
this type of drive particularly suitable for battery-driven equipment.
ADS 50/5 servo-amplifier
maxon's new ADS 50/5 servo-amplifier is a
competatively priced 4 quadrant servo-amplifier for DC motors
| Even during the development phase, great emphasis was placed on user-friendliness, low costs,
state-of-the-art technology and multi-usage. The resultant product sets new standards in terms of attractively priced top drive
electronics. |
 |
The ADS 50/5 is a high-performance PWM servo-amplifier for permanent magnet-energized DC motors with an
output power of up to around 250 Watts. It allows the following operating modes:
- IxR compensation
- DC tacho control
- digital encoder control and
- current control
The required operating mode is selected via a DIP switch. The ADS 50/5 is protected against
over current, over temperature and short-circuiting of the motor circuits.
The design uses modern MOSFET technology for high efficiency of up to 95%. Together with the high PWM pulse
frequency of 50kHz, a built-in choke also allows the connection of motors with very low inductance. In most cases, additional
external inductance is not necessary.
Due to the wide supply voltage range of 12V - 50V, the ADS 50/5 is very flexible in its usage with varying
voltage sources.
The modular-style metal casing offers several mounting options so that the amplifier can easily be inserted
into any installation. Practical screw terminals and a heavy duty regulator design make the start-up procedure quick and easy.
Catalog and Selection Program on CD-ROM
| Consulting, calculating, product information and almost everything about drive
components and systems: The interactive maxon catalog on CD-ROM offers effective help for your daily drive problems.
The catalog shows all the information which is in the printed, 218 pages strong, maxon catalog.
The maxon selection program calculates possible drive solutions. The input of some known data are
sufficient, and the optimum drive components, for you, appear on your screen.
|
 |
The program saves you time and gives a reliable selection from the large product range.
- various input parameters
- general conditions: max. dimension, temperature, speed etc.
- various windows for data sheets and diagrams
- user friendly display of the solution, checklist, nominal data and tolerances, graphical presentation
- display of matching DC tachos or encoders
- fast comparison of several motors
- practical on-line help with additional information on the maxon motor products
The maxon selection program requires WIN 3.x / WIN95 / WIN98 or WIN NT with a 386 Processor and 4 MB RAM
memory. The installation of this program uses approximately 10MB on the hard disc.
Download the maxon
selection program
The electronic catalogue can be used as a hybrid under Windows as well as Apple Macintosh. For full
functionality the Adobe Acrobat Reader is required. It is included on the CD-ROM and can be installed if desired.
The catalogue part presents all detailed information about DC motors in diameters from 10 to 75 mm with
assigned power rating up to 250 Watt, all about electronically commutated motors, about the modular system with gearheads, DC-tachos,
encoder and resolver as well as the right electronic parts. With a mouse click the user selects directions, recommendations and
information and recommendation on the company.
© 1999 maxon motor ag, CH-6072 Sachseln, All Rights Reserved, Last Update: 20.05.05
New High
performance brushless motors 200 W at only 30 mm dia 