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Your advantages

Expand energy efficiency
because DR..J synchronous motors can be used worldwide, even in the highest efficiency class IE4.

Reduce size
because a DR..J motor can be up to two sizes smaller than a comparable standard asynchronous motor.

Constant rotational speed
because the DR..J motor runs at a constant rotational speed regardless of the load, synchronous to the supply frequency without slip.

Helical gearmotors R..DR.. Flat gearmotors F..DR.. Helical-bevel gearmotors K..DR.. Worm gearmotors S..DR.. W..DR. right-angle gearmotors Control cabinet technology Control technology

DR..J synchronous motor (LSPM technology): The energy-efficient motor concept

The Line Start Permanent Magnet (LSPM) motor is an AC asynchronous motor that contains additional permanent magnets in the rotor with squirrel-cage rotor. After its asynchronous startup, the motor synchronises itself to the supply frequency and finally runs in synchronous mode. A motor technology that opens up new, flexible application possibilities in drive technology.

The synchronous motor has no rotor losses during operation and impresses with its particularly high efficiency and compact design. With the same efficiency class, the size of a DR..J synchronous motor with LSPM technology is reduced by 2 stages compared to a series motor with the same performance.

A comparative example:
A DRE.. series motor with a power rating of 1.1 kW in size 90M fulfils efficiency class IE2. In comparison, thanks to LSMP technology, you now "only" use a DRE..J of the smaller size 80S for IE2. Efficient and economical!

With the synchronous motor DR..J (LSPM technology), we as a motor manufacturer have succeeded in connecting the advantages of the durable and resistant asynchronous machine with those of the low-loss and compact synchronous motor. For more efficiency in your users.
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Efficiency classes IE2 to IE4

  • DR..J motors fulfil 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 AC asynchronous motors.
    • Compared to a DR.. series motor with the same performance, you can select smaller sizes of DR..J motors and achieve the same efficiency class.
  • designed for operation on simple inverters with closed-loop V/f control
  • no rotor losses occur during operation
  • 9 sizes in total (71S to 100L)
  • compact and robust design, low maintenance
  • synchronous operation of the motors with the supply frequency
  • Slip-free speed control without encoder feedback
  • Group drive of several motors with synchronous rotational speed on one frequency inverter
  • Proven combinations with MOVIMOT®the gearmotor with integrated frequency inverter
  • High speed setting range with constant torque without forced air cooling fans
  • Many additional features of the modular motor system available
  • Can be combined with our gearmotors

DR..J series synchronous motor: one motoring operation - three efficiency classes

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

In addition to the products from the energy-saving modular system, our effiDRIVE® energy-saving solutions also offer expert energy advice and a modular, customisable service.

Find out more!
  • in centralised installations, e.g. in process technology
    • You can operate the DR..J motor directly on the mains or on the frequency inverter as an individual or group drive, e.g. with the frequency inverters MOVITRAC® LTP B and MOVITRAC® B
  • in decentralised installations, e.g. in materials handling technology
    • simply integrate the DR..J motoring operation into a MOVIMOT®.. This one drive component, the gearmotor with integrated frequency inverter, moves and controls the drive train directly from the field

FI operation / 50 Hz

Constant torque from 300 - 1 500 min-1 [CT 1:5]
Design Efficiency class Size Power rating PN
kW
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

FI operation / 87 Hz

Constant torque from 300 - 2 610 min-1 [CT 1:8.7]
Design Efficiency class Size Power rating PN
kW
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 according to IEC 60034-30-1:2014 only valid for 50 Hz or 60 Hz

Line operation / 50 Hz

Nominal speed: 1 500 min-1
Design Efficiency class Size Power rating PN
kW
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
  • Applications in continuous duty, e.g. baggage conveyor belts in airport logistics or pump applications
  • Applications with high speed constancy, e.g. spinning pump drives for conveying material for textile machines, roller drives in the glass industry or conveyor drives in coating processes
  • When planning new systems that require higher efficiencies, DR...J motors in IE4 with LSPM technology, for example, can be used.
    • replace reluctance motors, or
    • replace IE2 motors of the same size
  • In process technology applications, this motor has proven its worth with MOVITRAC® LTP-B and MOVITRAC® B frequency inverters as a single or group drive
  • For materials handling technology applications with decentralised installation, simply combine the DR...-J motor with a MOVIMOT® and the associated wiring and communication options