The encoderless Lean motor

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.

BENEFITS
The new motor class

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.

Completely without an encoder

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.

With only one cable

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.

The rugged and inexpensive alternative

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!

TECHNICAL DATA
Power density:
Price category:
  • Nominal torque: 2.25 – 25.7 Nm
  • Stall torque: 2.43 – 29.8 Nm

Find your right fit!
FEATURES
LM SERIES
  • 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
 
APPLICATIONS
Automation
Industries and Applications

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.

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Winders
Industries and Applications

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 more
DOCUMENTS
The document you are looking for is not listed? Hint: Select "all languages".
TitleVersionIDDateLanguageSize / Type
Bridge the Gap – LeanMotorBridge the Gap – LeanMotor004430842019 06EN731.62 KB
Catalog Lean Motors LMCatalog Lean Motors LM064430162023 05EN13.91 MB
Catalog STOBER compactCatalog STOBER compact064426552024 10EN9.76 MB
The document you are looking for is not listed? Hint: Select "all languages".
TitleVersionIDDateLanguageSize / Type
Operating manual LM lean motorsOperating manual LM lean motors014430482019 05EN910.05 KB
Safety instructions for synchronous servo motors synchronous servo geared motorsSafety instructions for synchronous servo motors synchronous servo geared motors004431042018 07EN74.66 KB
The document you are looking for is not listed? Hint: Select "all languages".
TitleVersionIDDateLanguageSize / Type
Connection plan LM_AT on SI6Connection plan LM_AT on SI6004430172017 11EN41.51 KB
Connection plan LM_AR on SC6Connection plan LM_AR on SC6004427832017 11EN35.78 KB
The document you are looking for is not listed? Hint: Select "all languages".
TitleVersionIDDateLanguageSize / Type
No results were found.
The document you are looking for is not listed? Hint: Select "all languages".
TitleVersionIDDateLanguageSize / Type
UK declaration of conformity synchronous servo motors and synchronous servo geared motors EZ ED EK LM UK declaration of conformity synchronous servo motors and synchronous servo geared motors EZ ED EK LM 004432972021 10EN71.46 KB
EU Declaration of conformity synchron motors LMEU Declaration of conformity synchron motors LM034430822024 03EN73.54 KB
Certificate UL - cURus Lean motors LMCertificate UL - cURus Lean motors LM004430982017 12EN1.27 MB
Certificate Free of CCCCertificate Free of CCC344420722024 09EN309.97 KB
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Made 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 for drives and automation.

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