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

The Speed-Torque Gradient 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 above, 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.

The content & opinions in this article are the author’s and do not necessarily represent the views of RoboticsTomorrow

Electromate

Electromate specializes in robotic, mechatronic, and motion control solutions. We focus on high-performance and precision applications for the industrial automation sector. Electromate's Core Purpose is to help Manufacturers compete globally by building better machines using differentiated automation technology. Electromate helps at every stage of your automation project, from sizing and selection to the development and support of new and existing systems. We also offer thousands of parts for immediate online purchase, ensuring you have quick access to the automation components you need.

Other Articles

The Emergence of Mechatronic Subsystems and Their Importance in Product Deployment

A mechatronic subsystem is a fully integrated functional unit that combines mechanical, electrical, electromechanical, and control elements into a single pre-engineered solution.

Optimizing Servo System Performance: A Comprehensive Guide to Eliminating Electrical Noise and Enhancing Noise Immunity

This whitepaper will delve into the steps and techniques necessary for mitigating electrical noise in servo systems, ensuring optimal performance and reliability for high-precision applications.

Understanding the Motor Constant in DC Motor Sizing

One of the most often overlooked parameters of direct current motors (both brush and brushless) is the Km or motor constant. The motor constant (expressed as Km) defines the ability of a motor to transform electrical power into mechanical power.

More about Electromate

Featured Product

Midwest Motion Products is a leading provider of robust and reliable Motion Control Products.

MMP specializes in supplying high-quality Brushed & Brushless DC Motors & Gearmotors for Robotics and Automation Equipment with a wide range of motor windings and gear ratios. With an impressive track record of more than 8,000 released DC Gearmotors designs and over 2,000,000 individual part numbers, we are renowned for our ability to handle large-scale orders. Due to our huge on-hand inventory, we are also well known for lightning-fast delivery of our standard products. We take pride in our dedicated customer service and our team of knowledgeable sales and engineering experts who are ready to assist you with custom design solutions tailored to your specific application. Additionally, we also offer a wide range of complimentary products, such as DC Motor Controls, DC Linear Actuators, AC-DC power Supplies, and DC Servo Amplifiers and others.

More Products

Feature Your Product