Does energy efficiency have to be bulky? Not with us! The encoderless Lean motor.
To meet the strict requirements of the European Ecodesign Directive, the drive world is constantly striving to increase the efficiency of electric motors. This results in increased weight and sizes.
With the encoderless Lean motor, STOBER has launched a compact solution that is lighter, smaller and – with IE5 classification – more energy-efficient than an asynchronous motor while delivering the same power. And it is also cheaper and more rugged than a standard servo motor.
- The new motor class
- Completely without an encoder
- With only one cable
- The rugged and inexpensive alternative
To reach higher efficiencies in asynchronous motors, as an example, you need more or higher-quality materials, such as copper. This makes the motors much larger and also heavier!
As the demands on asynchronous motors increase, the cost difference from more expensive but significantly more efficient servo drives shrinks.
And this is exactly where we come in: The strictly encoderless synchronous servo motor without a fan reaches efficiencies of up to 96% and energy efficiency class IE5 as a result!
At the same time, it is lighter and smaller than an asynchronous motor and less expensive and more rugged than a standard synchronous servo motor.
You get a more compact design and benefit from lower energy requirements and a long service life.
The position and speed are determined in combination with the SC6 and SI6 drive controllers.
Despite not having an encoder in the motor, the speed deviation is less than 1%, while the positioning accuracy is ±1°.
Since the encoder is omitted, this motor class is ideal for dynamic automation tasks in harsh production environments.
Here’s the major advantage of the Lean motor. By leaving out an encoder, it can be continuously controlled with just a standard power cable without additional shielding.
This means less installation and routing effort, smaller drag chains, smaller control cabinet feed-throughs and lower costs.
By eliminating the encoder, the Lean motor uses a single off-the-shelf power cable with no additional shielded wires. These are two factors that make it up to 30% cheaper than a comparable synchronous servo motor.
Since the encoder is left out, the STOBER Lean motor can withstand high oscillations and vibrations.
And the reduced wiring also makes commissioning so much easier!
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- Nominal torque: 2.25 – 25.7 Nm
- Stall torque: 2.43 – 29.8 Nm
Find your right fit!
- Energy efficiency class: IE5 (highest class) in acc. with IEC/TS 60034-30-2
- Shaft: Solid shaft with feather key
- Brake: Optional robust spring-loaded holding brake on the motor’s B side
- Power interface:
- Rotating plug connectors with quick lock
- Encoderless motor, the position is determined via the power connection
- Correct position and speed determinations in combination with STOBER SC6 and SI6 drive controllers
- Speed deviation is less than 1%, positioning accuracy is ± 1°
- Cooling: Convection cooling
- Winding protection: PTC thermistors guarantee thermal winding protection
- Paint: RAL 9005 Jet black
- Marks and test symbols: CE and cURus
- Recommended drive controllers: STOBER drive controllers of the SC6 or SI6 series
We get your visions moving – in various industries and markets worldwide.
Using a holistic approach for your specific task, we support you with precisely tailored solutions for drives and automation.
Learn moreWe get your visions moving – in various industries and markets worldwide.
Using a holistic approach for your specific task, we support you with precisely tailored solutions for drives and automation.
Learn more| Title | Version | ID | Date | Language | Size / Type | |
|---|---|---|---|---|---|---|
 | Bridge the Gap – LeanMotor | 00 | 443084 | 2019 06 | EN | 731.62 KB |
 | Catalog Lean Motors LM | 06 | 443016 | 2023 05 | EN | 13.91 MB |
 | Catalog STOBER compact | 06 | 442655 | 2024 10 | EN | 9.76 MB |
| Title | Version | ID | Date | Language | Size / Type | |
|---|---|---|---|---|---|---|
 | Operating manual LM lean motors | 01 | 443048 | 2019 05 | EN | 910.05 KB |
 | Safety instructions for synchronous servo motors synchronous servo geared motors | 00 | 443104 | 2018 07 | EN | 74.66 KB |
| Title | Version | ID | Date | Language | Size / Type | |
|---|---|---|---|---|---|---|
 | Connection plan LM_AT on SI6 | 00 | 443017 | 2017 11 | EN | 41.51 KB |
 | Connection plan LM_AR on SC6 | 00 | 442783 | 2017 11 | EN | 35.78 KB |
| Title | Version | ID | Date | Language | Size / Type | |
|---|---|---|---|---|---|---|
| No results were found. | ||||||
| Title | Version | ID | Date | Language | Size / Type | |
|---|---|---|---|---|---|---|
 | UK declaration of conformity synchronous servo motors and synchronous servo geared motors EZ ED EK LM | 00 | 443297 | 2021 10 | EN | 71.46 KB |
 | EU Declaration of conformity synchron motors LM | 03 | 443082 | 2024 03 | EN | 73.54 KB |
 | Certificate UL - cURus Lean motors LM | 00 | 443098 | 2017 12 | EN | 1.27 MB |
 | Certificate Free of CCC | 34 | 442072 | 2024 09 | EN | 309.97 KB |
Take advantage of the expertise of our application engineers in the Sales Centers or contact our first level support.
OPENsystemsupport@stoeber.de
With SERVOsoft®, you have a tool at your fingertips that lets you design your drive systems with precise scaling in just a few steps. Electrical as well as mechanical design, and simple and fast at the same time.
OPENWith the intuitive STOBER product configurator, you can filter, compare, save and share the right drive solutions with ease.
OPENAre you looking for CAD data? With the STOBER CAD tool, the drawings you need are ready for download in just a few clicks.
OPENSTOBER is present in over 40 countries worldwide with 13 locations and 80 service partners. No matter where, no matter when, we’re always at your service and on the move!
OPENDo you need competent help with replacement parts, replacement drives, repairs and retrofitting? Feel free to contact us! We also offer a 24-hour hotline for urgent cases.
OPENMade in Germany. Since 1934.
We get your visions moving
in various industries and markets worldwide.
Using a holistic approach for your specific task, we support you with precisely tailored solutions like lean motors for drives and automation.
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