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New VLM Servo Motors for value conscious applications March 22, 2019

Posted by Servo2Go.com in New Product Press Releases.
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Greenville, DE —   Kollmorgen has launched the VLM servo motor series to fill the gap between stepper and high-performance servo motors. The new VLM series synchronous servo motors offer OEMs, machine builders and end-users, an excellent price-performance proposition in the torque range of 0.5 to 4.5 Nm continuous and 16 Nm peak, with speeds of up to 6000 rpm.  They also provide highly flexible configuration, proven quality and high reliability. Hence, they are a very useful solution for many applications where stepper or asynchronous motors are pushed to their limits but the expense and unused dynamics of high performance servo motors is not desirable.

The many standard design and configuration options built into the range allow engineers an optimal solution from the outset, to tailor their applications and machine requirements.  Thus, installation time and cost is minimized and the price-performance ratio is further improved.  The VLM series motors are available with standard frame sizes of 60 mm and 90-mm or NEMA 23 and 34 in each of the six most popular motor sizes and with a choice of twelve standard windings. The extensive possibilities for shaft and mounting facilitate seamless integration into virtually any system.

Feedback options include Digital Resolver (SFD), resolver, encoder and Hall sensors. VLM motors achieve continuous torque up to 4.5 Nm and peak torque to 16 Nm and can be used in power systems with 230 VAC. And of course, the new motors meet the ROHS Directives for CE and UL certification.

Information on the Kollmorgen VLM Brushless Servo Motors available from Servo2Go.com can be viewed at:  https://www.servo2go.com/products/servo-motors-drives/servo-motors/

For more information, please contact:

EDITORIAL CONTACT:

Warren Osak
warren@servo2go.com
Toll Free Phone:   877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

 

 

Tags:  Kollmorgen, VLM Series, Servo Motor, BLDC Motor, Brushless Motor, Servo2Go

 

Reasons For Turning To Slotless Motor Technology July 15, 2013

Posted by Servo2Go.com in Technical Support Information.
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The slotless stator design originated with the goal to deliver smooth-running performance and eliminate cogging, which is an unwanted characteristic especially in slower-running applications (less than 500 rpm).  The absence of cogging is, in fact, the most-often cited reason for selecting a slotless brushless motor.

Click on the link below to view the complete White Paper.

http://www.servo2go.com/support/files/REASONS%20FOR%20TURNING%20TO%20SLOTLESS%20MOTOR%20TECHNOLOGY.pdf

More information on the BLDC Servo Motor Products from Servo2Go can be found at the link below-

http://www.servo2go.com/category.php?cat=10020&sub=10023

For more information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

NEMA 17 Frame High Speed Brushless Motor/Encoders March 17, 2013

Posted by Servo2Go.com in New Product Press Releases.
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ElectroCraft RapidPower high-speed brushless motors feature ball-bearing construction, dynamically balanced rotors, low vibration and low audible and magnetic noise.

ElectroCraft RP17 Brushless Motor

ElectroCraft RP17 Brushless Motor

By utilizing M-8 ceramic and rare-earth neodymium magnets, these BLDC motors provide the quick acceleration and consistent speed (up to 15,000 rpm) needed for applications such as centrifuges, fans and pumps.   Sealed ball bearings and reduced torque ripple from skewed magetization also ensure a smooth operation at any speed.

They are compatible with all three-phase brushless DC motor amplifiers and have optional 500 or 1000cpr encoders.

For more information on the Nema 17 brushless motors from ElectroCraft, click on the link below-

http://www.servo2go.com/product.php?ID=105478&cat=

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

Handbook For High-Performance Brushless Servo Systems February 7, 2013

Posted by Servo2Go.com in Technical Support Information.
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Published by ElectroCraft,  12pages

Comparison of DC servomotors and brushless servomotors

ElectroCraft Handbook For High-Performance Brushless Servo Systems

ElectroCraft Handbook

The traditional permanent magnet DC servomotor has been the industry workhorse for many decades in highperformance servo drive applications.  The primary reason for this is that the DC servomotor is very easy to control using adjustable DC voltage.  A brief review of the operating principle of the DC motor illustrates this point (continued)…

Click on the link below to download this Free Handbook.

http://www.servo2go.com/support/files/ElectroCraft%20EC_Handbook%20for%20High-Performance%20Brushless%20Servo%20Systems-Final%20S2G.pdf

More information on brushless servo motors from ElectroCraft can be found at the link below-

http://www.servo2go.com/supplier.php?id=1189973790

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

New Product Release: BLDC Drives and Motors from Applied Motion Products December 27, 2012

Posted by Servo2Go.com in New Product Press Releases.
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Applied Motion Products' brushless DC motors and drives

Applied Motion Products’ brushless DC motors and drives

Applied Motion Products is proud to announce the release of our new line of brushless DC motor drives. The BD5 is a brushless DC motor drive that is based on advanced control technology featuring excellent performance and ease of use.  The drive is aimed at OEM applications that require high performance, high speed stability, basic speed control and low cost. Its velocity modes are controlled by way of analog or multispeed digital inputs.  The supply voltage for the drive is 12 to 48 VDC (PS150A24 power supply recommended) with an operating current of 5 amps RMS continuous and a peak current of 10 amps RMS.

To compliment the BD5 drives, Applied Motion Products is offering three performance matched 42mm brushless DC motors.  Maximum speed is 4500 rpm.  Max continuous torque is 0.225 N-m (32 ounce-inches).

To aid in drive/motor placement, Applied Motion Product is offering two extension cables: a 1 meter cable, part number 3004-272-1M, and a three meter cable, part number 3004-272-3M.

More information on BLDC Drives and Motors from Applied Motion Products can be found at the link below-

http://www.servo2go.com/product.php?ID=105511&cat=

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

NEMA Frame Brushless Servo Motor/Encoders from ElectroCraft December 19, 2012

Posted by Servo2Go.com in New Product Press Releases.
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ElectroCraft EXC23 Brushless Servo Motor

ElectroCraft EXC23 Brushless Servo Motor

The EXC-Series 2.3-inch AC Servo motor offers customers high economic value and superior reliability. The EXC-Series is a cost-improved version of the popular Excalibur family of AC Servo motors sold under the Rockwell Automation brand. This product provides considerable cost improvements for a variety of light industrial, commercial, and medical applications.

The ElectroCraft RapidPower™, EXC, and E-Series are fast, low vibration BLDC motors. By utilizing M-8 ceramic and rare-earth neodymium magnets, these BLDC motors provide the quick acceleration and consistent speed (up to 15,000 rpm) needed for applications such as centrifuges, fans and pumps.  Sealed ball bearings and reduced torque ripple from skewed magetization also ensure a smooth operation at any speed.

More information on NEMA Frame Brushless Servo Motor/Encoders from ElectroCraft can be found at the link below-

http://www.servo2go.com/search.php?search=ElectroCraft RapidPower&D=PROD

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

How to Calculate Motor Torque Constant April 3, 2012

Posted by Servo2Go.com in Technical Support Information.
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The torque constant, Kt, of a motor is a very useful parameter for sizing and controlling motors showing a linear speed / torque relationship.  Both DC brush type and brushless motors exhibit this linear performance curve relationship.

Servo2Go's Brushless Servo Motor Family

Servo2Go's Brushless Servo Motor Family

Without getting into theoretical detail, Kt is simply the slope of the torque / current curve of a motor.   The units of the constant are found in torque units per amp. (e.g. N-m/amp, oz-in/amp, etc.) Kt can be useful in both design and application.  Looking at the current in the system the designer or control system can calculate the actual torque output of the motor during operation.  This can be used in a variety of ways.  It allows the designer to understand the actual load that is seen in the application and understand if the optimal motor for the application is being used.   On the control side, a control can be set up with a current limit to ensure that the mechanical system is not over loaded or it can be used to assure that the motor does not overheat during use.  

Additionally, Kt is used in torque mode applications to maintain a controlled amount of torque to meet the application needs.  Example:  The power source for the application allows for the motor to draw a maximum current of 10 amps. Based on the design, you need to drive a maximum load of 10N-m. What is the minimum Kt needed for this application?

It should be noted that the parameter Kt is not related to the voltage under which the motor is operated.   If you use the motor at 12VDC or 24VDC this constant will remain the same.  This attribute of the motor is very useful as the motor is used in a motion control system.   The overall torque output of the DC motor system is maintained by monitoring current while the motor’s speed output is varied by controlling the voltage into the motor.

Click on the link below for information on the Servo Motors available from Servo2Go.com –

Servo2Go’s Servo Motor Product Family

For more information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@servo2go.com 
Toll Free Phone:   877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

Reducing cogging torque in brushless motors March 29, 2012

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Selecting the number of rotor poles and slot combinations to reduce cogging is not an intuitive exercise.  Take advantage of these guidelines based on pretested configurations to help you optimize your next motor design.

Cogging torque in dc brushless motors comes from variations in magnetic field density around a rotor’s permanent magnets as they pass the nonuniform geometry of the slot openings in the stator.  In applications such as servosystems and spindle drives, the pulsating speed that cogging generates can blemish machined surfaces or reduce position accuracy. 

Unfortunately, classical electromagnetic calculations do not provide the data needed to determine how much cogging torque might develop in a new paper design.  Although a complete finite-element analysis may be an alternative to manual methods, it usually requires more project time than is available.  In most cases, several prototypes must be made to measure and eventually reduce the cogging torque.  Thus, it is critical to have a simple check list of major factors that determine cogging torque during the initial design procedure so several iterations can be made before finalizing the drawings.

Major factors affecting cogging torque include magnetic wave shapes, air-gap length, slot opening, number of stator slots and rotor poles, skewing, copper fill, pole pitch, flux distribution or density, magnet volume, and material weight.  Relationships between some of these factors, including electrical degrees/cycle, and cycles/rev vary among multiple-pole motors.  

Analyzing the ripple torque for each type leads to a set of guidelines for new designs.  For example, the maximum number of cycles in one electrical cycle for a stator with an even number of slots can equal the number of slots itself.  But for a motor with an odd number of slots, the number of cycles can be twice the number of slots.

Moreover, for a given frame size and type of lamination, slot and pole combinations as well as different pole arc to pitch ratios and magnetization, can produce different cogging torques.  Keeping the number of poles on both rotor and stator ID and slot openings constant, and varying the number of slots, shows how cogging torque behaves for different slot and pole combinations.

Skewing the magnets or the stator core often can lower cogging a bit more.  When a design without skewing already shows minimal cogging, the skew angle required to reduce cogging below a particular value will be much smaller.  Also, designing for a trapezoidal or nearly sinusoidal air-gap wave-form (made by varying the pole arc to pole-pitch ratio) is a common practice that often reduces cogging torque even further.

Click on the link below for information on the Servo Motors available from Servo2Go.com –

Servo2Go’s Servo Motor Product Family

For more information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@servo2go.com 
Toll Free Phone:   877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com