The importance of the Speed-Torque Gradient in DC Motor Sizing

Often overlooked when sizing DC motors is the Speed-Torque Gradient.

The Speed-Torque Gradeint is defined as  Δn / ΔM  [rpm/mNm] .

The speed / torque gradient is an indicator of a motor’s performance.  The smaller the value, the more powerful the motor and consequently the less motor speed varies with load variations.  It is based on the quotient of ideal no-load speed and ideal stall torque.

The speed torque-gradient can be considered a measure of the motor strength, which is defined by motor type and size and not the winding selected.  Basically it’s how much speed drop the motor will have for each 1mNm of torque applied.

In the figure below, enhancing the load torque leads to a linear reduction of the speed.  Thus it becomes clear what the meaning of Δn/ΔM is:  It’s the gradient of the speed-torque line.

Speed Torque Gradient Curve for Maxon Motors

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

Advertisements

0 Responses to “The importance of the Speed-Torque Gradient in DC Motor Sizing”



  1. Leave a Comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s




Archives

Subscribe to this blog by entering your email address below.

Join 646 other followers

Hey there! Electromate is using Twitter.

Presentation Playlist

Flickr Photos

Lintech Group Photo

Kollmorgen Product Family #2

Harmonic Gearhead Family

Galil-30000-group

Applied Motion Products ST Drives family group shot

Advanced Motion Control Product Family

Tolomatic RSA family

Wago Product Family

Wago I-O Systems

Wago I-O Systems product range

More Photos

Blog Stats

  • 52,269 hits

%d bloggers like this: