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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.

Helical gear units R..DR.. Parallel-shaft gearmotors F..DR.. Helical-bevel gearmotors K..DR.. Helical-worm gearmotors S..DR.. Right-angle gearmotors W..DR. Control cabinet technology Control technology
The energy-efficient motor concept

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.

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Efficiency classes IE2 to IE4

  • DR...J motors meet the requirements for efficiency classes IE2 to IE4
  • Line start permanent magnet motor
    • Our LSPM technology is based on the addition of permanent magnets in the short-circuit cage of the AC asynchronous motors
    • In comparison to a DR.. series standard motor of the same power rating, you can select smaller sizes of the DR...J motors and achieve the same efficiency class
  • Designed for operation on simple inverters with V/f control
  • No rotor losses occur in operation
  • Nine sizes in total (71S to 100L)
  • Compact and robust design, low-maintenance
  • Synchronous running of the motors with operating frequency
  • Slip-free speed control without encoder feedback
  • Group drive of several motors with synchronous speed on a frequency inverter
  • Proven combination with MOVIMOT®, the gearmotor with integrated frequency inverter
  • High speed setting range with constant torque without forced cooling fan
  • Many additional features of the modular motor system are available
  • Can be combined with our gearmotors

DR...J series: One motor - three efficiency classes

  • 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.

Find out more!

  • 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

FI operation / 50 Hz

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

DesignEfficiency classSizePower PN
DRE..JIE271S – 100M0.37 – 4.0
DRP..JIE371S – 100L0.37 – 4.0
DRU..JIE471S – 100L0.18 – 3.0

FI operation / 87 Hz

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

DesignEfficiency classSizePower PN
DRE..J--*71S – 100M0.55 – 5.5
DRP..J--*71S – 100L0.55 – 5.5
DRU..J--*71S – 100L0.25 – 4.0

* IE classification as per IEC 30034-30-1:2014 is only applicable to 50 Hz or 60 Hz

Line operation / 50 Hz

Nominal speed: 1500 rpm

DesignEfficiency classSizePower PN
DRE..JIE271S – 100M0.37 – 4.0
DRP..JIE371S – 100L0.37 – 4.0
DRU..JIE471S – 100L0.18 – 3.0
  • 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