Posts Tagged 'Servo Motor'

maxon presents new High Torque DC brushless motors

For applications demanding very high torque, drive specialist maxon motor is now launching its EC-i 40 DC brushless motor in a High Torque version.  The iron-core internal rotor drive is available with a diameter of 40 mm and delivers up to 234 mNm of torque.

maxon's new EC-i 40 DC brushless high torque motor

maxon’s new EC-i 40 DC brushless high torque motor

When it comes to powerful movements, maxon delivers with its EC-i 40 High Torque series of DC motors.  The Swiss drive specialist presents three powerful iron-core internal rotor drives.  The drives have a diameter of 40 mm and are equipped with an innovative rotor.  They feature high dynamics, a low cogging torque, and extremely high output torque.  The strongest motor in this series offers a maximum nominal torque of 234 mNm and is 56 millimeters in length.  It exceeds the performance of its precursor model by up to 70 percent.

Especially suitable for robotics

The three new brushless DC motors are cost-effective and ideally suited for applications in robotics, prosthetics, and industrial automation.  The compact design offers a great solution in applications with extreme space constraints.  When needed, the EC-i 40 High Torque motors can be combined with maxon gearheads, servo controllers, or position controllers.  The EC-i 40 series is easily configured and available in our online shop. Shop.maxonmotor.com

Additional information and technical data is available by contacting maxon at sales@electromate.com.

For more on maxon, visit http://www.electromate.com/products/?partner=1072297493 .

Tags:  maxon, maxon motors, Electromate, EC-I 40, BLDC motor, brushless motor, servo motor, automation, DC motor

DC Servo Motors Made-To-Order: The Selection Just Got Bigger

maxon expands its configuration program

maxon motor’s successful X drives program is being expanded to include a new motor size and different planetary gearheads. Putting together the right DC drive assembly online has never been so easy.

maxon’s revoluntary X drives of DC motors and gearheads offer customizable choices that are easily and quickly configured online. They are stronger and more efficient than other drives currently available. The product line is now being expanded to include the DCX 12, a micromotor with a diameter of 12 millimeters to close the gap between the DCX 10 and the DCX 14. It is available with precious metal brushes as well as various options for ironless windings and bearings. The matching planetary gearhead (1–4-stage) is also now available.

New versions of configurable planetary gearheads

maxon expands its online configuration program

maxon expands its online configuration program

What’s more, existing gearhead sizes can now be obtained with several new reduction ratios: GPX 14 (new 3 and 4-stage), GPX 16 (new 4-stage), and GPX 37 (new 1 and 2-stage). The planetary gearheads with the sizes 14, 26, and 37 millimeters are also available in ceramic, reduced-noise-level, and reduced-backlash versions.

All the new products are now available in the online shop. Customers choose the desired motor, the matching winding, brushes, and shaft length, as well as the gearhead and encoder. The order is ready for shipment after just 11 days. You can find more at: xdrives.maxonmotor.com.

Tags:  maxon, maxon motor, Electromate, DCX, Servo Motor, BLDC Motor, Brushless Motor, GPX, ENX

High Efficiency Motors

Reprint of maxon motor USA October 14, 2014 white paper

To understand the concept of high efficiency motors, you must first know how to calculate efficiency and the losses associated with the motor components themselves.

The final measured efficiency of a motor is calculated based only on the elements of the particular application they’re used in.  For the motors themselves, without a load, manufacturers provide ratings based on standard formulas.  To understand high efficiency motors you only need to know what makes them different.

Cutaway of a maxon brush servo motor

Cutaway of a maxon brush servo motor

But first, let’s look at the basic concept used for explaining motor efficiency, which says that efficiency is the ratio between the shaft output power and the electrical input power.  Shaft output can be measured in horsepower or watts. We’ll use watts for the purposes of this article.  The formula most often used is the simple one mentioned above:

ηm = Pout / Pin

where

ηm = motor efficiency
Pout = shaft power out (Watts)
Pin = electric power to the motor (Watts)

Once you’ve used this formula and found your efficiency – and it’s not 100 percent – it’s time to consider the losses that occurred inside the motor.  Motor efficiency drops based on a number of known factors where power is lost as current through the motor is met with a variety of resistances.  These losses can include the wiring and its resistance, iron losses due to magnetic events, and thermal losses.

The electrical power that is lost in the primary rotor and in the secondary stator windings are called resistance losses (or copper losses, because they are based on the characteristics of the wire used including its diameter and length).  Both primary and secondary resistance losses vary with the load in proportion to the current squared. For example:

Pcl = R I2

where

Pcl = stator winding, copper loss (W)
R = resistance (Ω)
I = current (Amp)

Other losses include, iron losses, as mentioned above.  These losses are the result of the amount of magnetic energy dissipated when the motor’s magnetic field is applied to the stator core.  Other factors involved include mechanical losses, which involve the friction in the motor bearings and stray losses, which are basically any remaining losses that are left after the resistance, iron, and mechanical losses are calculated.

The largest culprit for stray losses are the result of harmonic energies that are generated when the motor operates under load.  The load affects the shaft power output, which is why it’s impossible to discuss in a general article such as this.  But basically, these losses are dissipated as currents in the windings, harmonic flux components in the iron parts, and leakage in the laminate core.

High Efficiency Motors

The maxon high efficiency motors get their name because they provide efficiencies in the 90 percentiles as opposed to the 50 to 60 percent range for most motors in their class.

The key to high-efficiency for maxon lies in the fact that they have no iron losses. maxon manufactures ironless core or coreless motors designed to the needs of their customers.  This means that the losses associated with the iron components have been eliminated.  By designing coreless and ironless core motors, maxon also eliminated the largest concentration of stray losses associated with motors, which are losses associated with leakage in the laminate core.

maxon incorporates the use of permanent magnets in their motors.  The ironless core brush motors have a permanent magnet, then a rotating winding, and then the housing, which closes the magnetic path.  With this configuration, there is no electricity going through the core of the motor (through the iron parts) to create a magnetic resonance.

The benefits of the ironless winding provides very specific advantages, which include: there is no magnetic detent and there are minimal electromagnetic interferences.  Part of the efficiency, though, is dictated by the type of magnet used in the design.  For example, the stronger magnets, such as NdFe will offer higher efficiencies.  Add to this, the fact that maxon includes graphite brushes and ball bearings in their brushed motors, customers gain long service life as well as high efficiency.

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:  high efficiency motor, servo motor, BLDC motor, maxon, maxon motor, Electromate, brush servo motor

Brushless servo motors – more control for valves with linear actuators

Reprint of blog posted by Ryan Klemetson of Tolomatic on Tue, Mar 24, 2015 @ 08:03 AM

Many process industry control engineers are looking to more sophisticated motion control solutions for valve automation. That’s because there’s an ever-growing need to improve productivity, increase efficiency and minimize downtime. It’s essential that engineers be able to control the valves that regulate the flow of materials throughout a facility. Continue reading ‘Brushless servo motors – more control for valves with linear actuators’

Motors deliver higher power density for compact robots

Kuka’s compact robots in the KR Agilus series are precise, agile and fast.  As agile systems, these five-axis and six-axis handling units feature short cycle times and high repeatability, particularly for pick-and-place tasks.

Synchronous servomotors from Kollmorgen’s AKM series play a major role in achieving this precision. Using collaborative co-engineering, the two companies reduced the installation volume of the motors compared to standard models.  The performance of the robots within their rated load range sets new standards for speed, cycle times and energy supply.  They can even handle unusual tasks in base and cover installation positions. Kollmorgen developed the custom motors by adapting motors from the standard AKM servomotor series.

As fast all-rounders, the robots are suitable for general industrial applications.  With a dead weight of 51 kg, the basic model can support loads up to 6 kg.  The compact robots are suitable for process automation in the packaging, electronics, food and pharmaceutical industries.

“We made a significant contribution to short cycle times and high precision by adapting our servomotors from the AKM series to Kuka’s specific needs,” said Theo Loy, sales manager at Kollmorgen.

The co-engineering partner adapted the design of the synchronous servomotors to make them fit perfectly in the joints of the robots.  That also enabled the engineers to increase the already high power density.

The objective was to find ways to implement custom performance improvements and structural assembly adaptations without sacrificing the advantages of industrial series production.  The aim was to optimize standard motors by making controlled modifications.  With custom adaptations, such as cable strain reliefs, modified bearing shells, Kuka-specific connector configurations or special drilled holes in the output shaft, the motor manufacturer could reliably maintain the majority of its standardization.  But is that still possible when the entire design geometry is fundamentally changed?

Using the smallest servomotor in the AKM series, it had to be made even thinner to fit compactly into the wrist joint of the robot.  The co-engineering process started off with 3D models and outside contours, and in the end it involved working with detailed design data.

To make things easier for the customer in the Kuka project, Kollmorgen also incorporated the engineering expertise of its own suppliers, such as a specially adapted motor brake.

“It acts as both a holding brake and an emergency brake,” said Loy. The KR Agilus is the only robot in its class that features Kuka’s Safe Operation function, which drastically simplifies human-robot interaction.

The AKM series of high-acceleration, permanent-magnet servomotors are available in 28 housing and mounting combinations.  They also feature reduced energy consumption, high control accuracy and high availability, and they are compatible with all commonly used supply voltages thanks to specifically adapted stator windings.

Information on the AKM Brushless Servo Motors can be viewed at the following webpage-

AKM Series Product Information

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:  Kollmorgen, AKM, Servo Motor, BLDC Motor, Electromate, AKM Servomotor

maxon motors for Space Applications

Check out this new video from maxon motor UK on how Oxford Space Systems are incorporating maxon motor products in their deployable structures for the space industry.

[click on the video image above to launch the video]

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, servo motor, BLDC motor, brushless motor, flat motor, pancake motor, automation, electric motor, motion control, motor winding selection

 

On Demand Webinar- DC Motor Types and Usage in Typical Applications

Selecting DC Motors Webinar


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