DR...J variant synchronous motors (LSPM technology)

Are you looking for a motor with the highest level of energy efficiency and a compact design? In that case, the DR...J motor with LSPM technology might be of interest to you: one motor which covers three efficiency classes. IE2, IE3 and IE4.

The energy-efficient motor concept

DR...J variant synchronous motors (LSPM technology)
DR...J variant synchronous motors (LSPM technology)
DR...J variant synchronous motors (LSPM technology)

The Line Start Permanent Magnet (LSPM) motor is an AC asynchronous motor which contains additional permanent magnets in the rotor with a squirrel cage. After an asynchronous start, the motor synchronizes with the operating frequency and runs in synchronous mode. A motor technology which opens up new, flexible possible applications for you in drive technology.

The synchronous motors do not show any rotor losses in operation.They have an impressive degree of efficiency while maintaining a very compact design. In the same efficiency class, a DR..J motor with LSPM technology is two frame sizes smaller than a standard motor of the same power rating.

Comparison example:

A standard DRE.. motor with 1.1 kW power rating of size 90 M meets the requirements of energy efficiency class IE2. By contrast, thanks to LSMP technology, you now use “only” one DRE..J of the smaller size 80S for IE2. Efficient and profitable!

With the DR...J motors (LSPM technology), we, as a motor manufacturer, have succeeded in combining the advantages of the durable and robust asynchronous motor with those of the low-loss, compact synchronous motor. For greater efficiency in your applications.

Only half the solution without a gear unit? In that case, use our modular system and combine an LSPM motor with a helical, parallel shaft, worm, bevel gear or SPIROPLAN® gear unit of your choice. All of these gear unit types are already available off-the-shelf, combined with DR...J motors as gearmotors.

And we do of course provide the right inverter technology for the controller and control. We develop and produce the drive electronics ourselves so that they are perfectly tailored to our motors and gearmotors and to your application.

Configure your individual product

  • Detailed information about your individual product
  • CAD data and documentation for your configuration
  • Direct order request or ordering
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Your benefits

  • Extend energy efficiency

    as you can use the DR...J synchronous motors anywhere in the world, also in the highest efficiency class IE4.
  • Reduce size

    as a DR...J motor can be up to two sizes smaller than a comparable standard asynchronous motor.
  • Constant speed

    as the DR..J motor runs at a constant speed regardless of the load, synchronous to the operating frequency without slip.


Energy efficiency

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  • Type DRU..J / LSPM technology = efficiency class IE4;
    0.18 kW to 3.0 kW power
  • Type DRP..J / LSPM technology = efficiency class IE3;
    0.37 kW to 4.0 kW power
  • Type DRE..J / LSPM technology = efficiency class IE2;
    0.37 kW to 4.0 kW power

Besides the products from the energy efficiency system, our effiDRIVE® energy-saving solutions also provide expert energy advice and a modular and customizable service.


  • in central installations such as in process technology
    • The DR...J motor can be operated directly on the power grid or with a frequency inverter as an individual or group drive, for example with MOVITRAC® LTP B and MOVITRAC® B frequency inverters
  • in decentralized installations such as in materials handling technology
    • simply integrate the DR...J motor in a MOVIMOT®. This one drive component, the gearmotor with integrated frequency inverter, moves and controls the drive section directly from the field

Technical data

DR...J motor up to efficiency class IE4

FI operation / 50 Hz

Constant torque from 300 to 1500 rpm [CT 1:5]

Close table
Design Efficiency class Size Power PN
DRE..J IE2 71S – 100M 0.37 – 4.0
DRP..J IE3 71S – 100L 0.37 – 4.0
DRU..J IE4 71S – 100L 0.18 – 3.0
We have stored a table for you here.

FI operation / 87 Hz

Constant torque from 300 to 2610 rpm [CT 1:8.7]

Close table
Design Efficiency class Size Power PN
DRE..J   71S – 100M 0.55 – 5.5
DRP..J   71S – 100L 0.55 – 5.5
DRU..J   71S – 100L 0.25 – 4.0
*IE classification as per IEC 30034-30-1:2014 is only applicable to 50 Hz or 60 Hz
We have stored a table for you here.

Line operation / 50 Hz

Nominal speed: 1500 rpm

Close table
Design Efficiency class Size Power PN
DRE..J IE2 71S – 100M 0.37 – 4.0
DRP..J IE3 71S – 100L 0.37 – 4.0
DRU..J IE4 71S – 100L 0.18 – 3.0
We have stored a table for you here.

Areas of application

  • Applications in continuous duty such as luggage conveyor belts in airport logistics or pump applications
  • Applications with high speed consistency such as spinning pump drives for material supply in textile machinery, roller drives in the glass industry or conveyor drives for coating processes
  • For the planning of new systems that require higher efficiencies, DR…J motors in IE4 with LSPM technology can, for example,
    • replace reluctance motors or
    • IE2 motors of the same size.
  • In applications in process technology, this motor with frequency inverters MOVITRAC® LTP B and MOVITRAC® B has proven to be extremely effective as a single or group drive
  • For applications in materials handling technology with decentralized installation, simply combine the DR...J motor with a MOVIMOT® and the associated wiring and communication options

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