Posts Tagged 'Servo Motor'

maxon motor takes part in chase to catch up with a comet

After more than ten years of travel through space, the European space probe Rosetta has reached the comet Chury.  Three months from now, for the first time in the history of space travel, a lander will touch down on the surface of the four-kilometer-wide comet.  DC motors manufactured by maxon are part of this pioneering feat.

On August 6th, the big day finally arrived: After a journey of more than ten years, the Rosetta space probe reached the comet 67P/Churyumov-Gerasimenko, known as “Chury”.  The mission team at the European Space Agency (ESA) jumped for joy. F or the first time in the history of space travel, a probe has rendezvoused with a comet.  It will now orbit and map the comet and gather various types of data.  Already, the first images received have yielded astonishing new insights:  The comet Chury, which is four kilometers wide, is not round or oval, but instead looks like two rocks loosely stuck together.  At minus 70°C, the surface is much warmer than expected and the first information indicates that it is covered with a black layer of dust.

First choice for space missions

maxon motor takes part in chase to catch up with a comet – Rosetta Mission

maxon motor takes part in chase to catch up with a comet – Rosetta Mission

Rosetta will now gradually approach the comet, until a distance of only 10 kilometers separates them.  The most difficult part of the mission will take place in mid-November 2014, when the Philae lander is scheduled to touch down on Chury.  It will be the first controlled landing on a comet.  A real pioneering feat – and maxon motor is part of it, with a DC motor on board. This is not the first time that the micro drives from Switzerland have been the first choice for space missions.  SpaceX’s Dragon spacecraft, which transports cargo to the ISS station, also contains maxon motors.  The same holds true for the Mars rovers, which have been diligently traveling across the surface of the red planet for many years.

What is next?

On our Twitter channel @maxonmotor, we will keep you up-to-date with news from the Rosetta mission.

Click on the link below to view the Maxon Motor Product Family.

http://www.electromate.com/products/?partner=1072297493

EDITORIAL CONTACT:
Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
www.electromate.com

 

Tags:  maxon, maxon motor, maxon DC motor, Electromate, EC-i40, servo motor, BLDC motor, brushless motor, flat motor, pancake motor, automation, electric motor, motion control

5 Tips for a Successful Servo Crossover

Reprint of March 27, 2014, article  by Josh Bellefeuille Sales Application Engineer at Kollmorgen

Kollmorgen Servo Motor FamilyThere are a number of situations that call for crossing over and replacing an existing motor with a newer servo.  These can include: product obsolescence, cost savings, lead time issues, or upgrading to newer technology.  The specifics of each application could lead to an endless number of important factors to consider.  In this post I will try to (briefly) identify those that are most common and their correct order of concern.

1. Healthy Motivations

Whatever the reason for a replacement situation, it is important to understand (and never forget!) the most important aspect of the task.  Mitigating risk.  A good replacement is one that minimizes the potential number of issues that may be experienced amidst the upgrade.  If great care is not taken to manage the potential risk of a replacement, a higher potential for system failure will be introduced.

This means cost should not be the controlling factor for replacements! A good replacement is one that minimizes risk AND reduces the cost of a system, versus reducing cost and accepting a higher potential for risk.

2. Axis Stability

Inertia matching is very important and often overlooked.  A servo replacement should have the same rotor inertia as the existing motor, or be as similar as possible.  The goal is to keep the stability of a system consistent when the new servo is introduced.  This of course assumes the existing system already has the desired stability.

If replacing a lower resolution system (i.e. tachometer, commcoder, or older resolver based system) it is often worthwhile to consider a high resolution sine-encoder feedback device, with resolution ≥ 220 counts per revolution (CPR). Doing so will give more flexibility when matching rotor inertias.  As a general rule, when improving feedback resolution with a high resolution device, the servo replacement should have at least one third of the inertia of the existing motor, though it’s preferred to have one half.  This method has been successfully applied in many applications.

3. Speed and Torque

Speed and torque matching is equally as important.  The performance of the replacement motor should meet or exceed the performance of the existing motor.  It is important to review the catalog values of each (i.e. continuous torque, rated speed) to ensure there are no shortcomings.

It is also critical to compare torque values over the entire speed range of each motor.  Comparing graphically may be a helpful exercise.  This can be done by comparing motor speed/torque curves and manually plotting like-values in a spreadsheet.  For example, at 1000 RPM the continuous torque for motor A = X Nm and motor B = Y Nm, and so on for the entire speed range.

4. Motor Dimensions

Though not critical to the performance of the motor, a retrofit situation becomes streamlined if the mounting dimensions of the replacement servo are identical to the existing motor.  The outline drawings of both motors should be reviewed to ensure consistency.  This is good practice even when replacing motors with industry standard mounts, like NEMA or IEC.  Standards typically have consistent pilot and bolt circle dimensions, but often do not maintain the same shaft dimensions.  Though you are replacing a NEMA 34 motor, one manufacturer’s definition may be drastically different than another’s!

5. Other Considerations

Is the motor the only part of the machine being replaced?  Typically a servo replacement will mean replacing the drives, cables, and in rare instances even the controller.  In this case the difference in motor windings can become a secondary consideration assuming manufacturer recommendations are followed.

However careful review is in order if the replacement motor is intended to be used with an existing drive.  Winding data (including motor constants: Kt and Ke), feedback device type and resolution, and cable pin-outs are just a few of the pieces that must be closely examined and matched.  Furthermore, different servo motor manufacturers often utilize different units and commutation methods for these critical parameters.  This can leave a lack of clear distinction between definitions and units of the motors being compared. As a supplementary resource, this helpful article further details some of the common specification inconsistencies that should be considered during a servo replacement.

Other aspects worthy of comparison may include overall envelope size, environmental ratings, holding brakes, bearing and load life, and specials. As hinted at earlier, this short article is in no way meant to serve as a comprehensive “checklist” of crossover guidelines.  Instead, I hope it serves as a high-level starting point for effective servo crossovers, in which risk is carefully considered and managed.

 

Tags:  Servo Motor, BLDC Motor, Electric Motor, Kollmorgen, Electromate, Servo, Automation

Temperature Effects on Motor Performance

When applying DC motors to any type of application, temperature effects need to be considered in order to properly apply the motor.  Performance will change as the motor temperature changes.  When reviewing DC motor curves, the user needs to ask the question “Do these curves represent performance of the motor at room temperature, or do these curves illustrate performance at the maximum rated temperature?”  Depending on the temperature and the required operating point on the motor curve, the performance difference between “cold” and “hot” conditions can be significant.

Click on the link below to download this White Paper.

http://www.engineeringwhitepapers.com/companies/haydon-kerk/temperature-effects-motor-performance/

 

Tags:  Motor Performance, Servo Motor, BLDC Motor, Electric Motor, Temperature Effects

E-book: Motor Selection & Gearbox Matching Tech Tips

In this Tech Tip E-Book, access resources on servo selection, tips for quiet gear motor operation, gearbox matching, basics of motor selection and more on motors.  Included are case studies for automotive and medical applications.  Get motor selection tips, selection tools and resources from Groschopp in this issue.

Click on the link below to download this E-Book.

http://s3.amazonaws.com/2013_pdfs/Groschopp/Groschopp-Tech-Tip.pdf

For more information, please contact:

EDITORIAL CONTACT:

Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
www.electromate.com

Tags:  Servo Motor, Servo Selection, Gearbox Matching, Motor Selection, Motor Tips, E-Book, Electric Motor, PMDC Motor

Highly Dynamic DC Brushless Servo Motor – maxon’s EC-i40

Compact And Powerful

In automation and robotics, many applications are characterized by high energy and high torque at the same time.  Spatial restrictions also mean that drives must be short, have a long service life and be maintenance-free.  The newly redesigned EC-i motors from maxon motors offer solutions that fit these requirements perfectly.

Maxon EC-i40 Brushless Servo Motor

Maxon EC-i40 Brushless Servo Motor

These brushless DC motors have several key advantages: low inertia, minimal detent, robust bearings and compact construction.  The use of high-powered permanent magnets ensures high power density, providing great speed stability under load.

These motors are available in 40 mm diameter and in two lengths, namely 26 mm (50 Watt) and 36 mm (70 Watt).  The modular system with gearheads, encoders and controllers from the maxon delivery program offers a large number of possible combinations.

EC-i motors are ideally suited for applications that require maximum drive in a minimum space.  Typical areas of application are robotics, industrial automation and security technology. 

Click on the link below for more information.

http://www.electromate.com/products/?keyword=EC-i+40&d=102310

EDITORIAL CONTACT:
Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
www.electromate.com

Tags:  maxon, maxon motor, maxon DC motor, Electromate, EC-i40, servo motor, BLDC motor, brushless motor, flat motor, pancake motor, automation, electric motor, motion control

 

 

This 480 W motor can withstand 200 °C, 1000 G, -5000 m and 1700 bar

maxon's EC-4pole 32 HD

maxon’s EC-4pole 32 HD

The Heavy Duty Motor EC 22 HD, innovation of the year in 2010, has now been joined by a larger and more powerful version. The new, electronically commutated EC-4pole 32 HD motor has all the features of the award-winning 22 mm motor.  It is designed for extremely rough operating conditions, particularly applications in deep drilling.

Deep drilling technology (called “downhole drilling” in the field of oil and gas exploration) makes it possible to recover oil and gas from depths of more than 2500 m. By combining deep drilling with directional drilling (dynamic position alignment of a bore in the earth), previously unreachable oil reserves are being opened up, with drilling depths of approx. 5000 m and drill lengths of up to 11000 m.  The development of specialized electronics and drives has made it possible to better monitor and control many functions across the entire drilling process.  For instance, it is now possible to dynamically measure and adjust the position of the drill head during the drilling process.  Diverse deep drilling tools also use hydraulic valves or flaps that are operated by electromechanical drives.  The temperatures and pressures at these depths, combined with the strong vibrations that occur during the drilling work, present unique challenges for the use of electronic drives.

The different versions of the EC-4pole 32 HD are designed for operation in air or in oil (flooded in hydraulic oil).  The power rating depends on the surrounding medium and amounts to 220 W in air and, due to the much higher heat flow, 480 W in oil.  They are designed for ambient temperatures of more than 200 °C and atmospheric pressures of up to 1700 bar.  The Ø 32 mm motors must also be able to withstand vibrations of up to 25 grms as well as impacts of up to 1000 G (1000 times the acceleration due to gravity at the earth’s surface).  As an example, a Formula 1 vehicle is exposed to approximately 2 G and fighter jets are exposed to approxi-mately 13 G.  The motors feature high efficiency (up to 89% in air, more than 80% in oil), making them ideal for use in battery-operated applications.  With their detent-free running properties, they have excellent control characteristics and are suitable for high-precision positioning tasks in outer space, even at low speeds.

The EC-4pole 32 HD is ideal for use in environments with extreme temperatures, subject to high vibration, or under ultra-high vacuum.  This means the motors can also be used in aerospace applications, e.g. for gas turbine starters, for the generators of jet engines, for regulating combustion engines, or for exploration robots.  For the use of the motor in conjunction with a gearhead, maxon offers the GP 32 HD, a powerful and robust planetary gearhead.

For more information on the Downhole Drill Motors & Gearboxes from Maxon, click on the link below:

Maxon Downhole Drilling Motor/Gearbox Product Family 

EDITORIAL CONTACT:
Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
www.electromate.com

 

Tags:  Downhole Drilling Motor, Extreme Environment, Harsh Environment, Servo Motor, 4pole Motor, Extreme Environment Motor, Harsh Environment Motor, EC 22 HD, EC-4pole 32 HD, Maxon, Maxon Motor AG, Electromate

TBW Series Iron Core Linear Motor from Tecnotion

The TBW series is the water cooled variant of the TB series.  It features a fully integrated, highly efficient cooling system which enables the TBW to reach even higher continuous forces than the standard version and sustain extreme accelerations while maintaining its submicron position accuracy.  Since heat is not dissipated into the machine’s construction, it is especially suited for applications where thermal management is an issue.

Tecnotion TBW Linear Motor

Tecnotion TBW Linear Motor

This type of motor has a low magnetic resistance. The ironcore and the magnet closing plate are excellent flux conductors, so only the magnets and a single airgap contribute to the resistance in the circuit.  Due to this low resistance, the ironcore motor’s operation involves a strong flux, yielding high forces and excellent efficiency.  That makes this type a real workhorse with the following main features:

  • high peak force density
  • high continuous force density
  • relatively low heat dissipation

 

Click on the link below for additional information.

http://www.electromate.com/products/series.php?&series_id=105525

More information on the Tecnotion Linear Motors can be viewed at-
http://www.electromate.com/products/?partner=1333113809&d=105526

For more information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@electromate.com
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699
www.electromate.com

 

Tags:  Tecnotion, Linear Motor, Servo Motor, Electromate, Iron Core Linear Motor


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