For decades, drive engineering solutions from SEW-EURODRIVE have proven themselves. They do their job in numerous applications – in a reliable, safe and precise manner. But even outstanding drive engineering solutions are subject to constant improvements and the same can be said for our motors. SEW-EURODRIVE may not necessarily have reinvented the principles of standard asynchronous motors, but we have certainly summarized and optimized current developments to introduce a new modular system for the DR motor series that offers solutions for requirements that will come up in the foreseeable future.
Certain trends in drive engineering have been evident for quite some time. One of these developments is certainly the attempt to save as much energy as possible. One option to save energy is to operate electric motors exclusively via frequency inverters in a controlled fashion. But even the electric motor itself can make a contribution to reduce energy consumption. Laws have already been passed in North America, Australia and New Zealand that prescribe the use of energy efficient motors. South America and many Asian countries are moving in the same direction.
Europe has been addressing the topic of energy savings by issuing the EuP guideline. SEW-EURODRIVE has recognized this trend very early on and the company was the first to introduce energy efficient motors based on die-cast copper technology five years ago.
Another trend seems to become apparent by requirements from the logistics industry. There are demands for small, compact and decentralized drive solutions for use in handling and transportation systems.
Recognizing trends and drawing conclusions
We have summarized and evaluated these and other trends. The result is a concept that has been introduced with the new modular DR motor system and is setting the new standard in drive engineering. The DR motor already meets future demands for minimum efficiency ratings of asynchronous motors.
We will continue to offer the proven MOVIMOT as part of the DR series of motors. The new generation is fully compatible with all other units and can be used with current motors of the DT/DV series.
The highlights of the DR motor
The DR motor system integrates all current requirements regarding efficiency worldwide (Standard, High, and Premium). The motors are available with optional rotors featuring a copper cage of the second generation.
A new modular brake design gives you the choice of two or three brake sizes for each motor. Brake motors with inverter control require less braking action and therefore smaller braking torques are required for energy efficient motors. It is also a lot simpler to install or remove brakes of the BE generation as of size 90 DR motors. These BE brakes are mounted on a friction plate and can be easily removed.
Many tasks require only simple positioning and velocity detection (e.g. synchronous encoders). The high-resolution encoders installed on the non-drive shaft end are often far too complex for this task. We have developed two new, fully integrated and very affordable encoders for the DR motor. They can be easily retrofitted. The encoder resolution is between one and about 100 pulses per revolution. We will introduce a rotation counter in the near future. The mounted encoders have been optimized as well. The standard encoders can now be mounted directly to the shaft and fan guard even for larger motors, 4-pole from 7.5 kW to 55 kW. The mounted encoders with sine/cosine signals have been equipped with a new, simpler connection. Input shaft assembly makes for easier connection of encoder cable and change of encoder.
We have also optimized the motor sizes as well as the available options.
- Many drives are more compact, i.e. they are narrower or shorter when compared with the DT/DV series.
- We have simplified the cable connection for the small motors and enhanced the connection space for these motors.
- The optional connection with cage tension springs instead of the terminal board makes wiring easier for customers; this option is available for DR71-132.
- We will still offer motor connection with IS plug connectors and so-called Harting plug connectors and are planning to expand the existing IS 4-pole power range to 7.5 kW or even 9.2 kW.
- The motor feet for motors 71 to 132 can be easily retrofitted. or
- The mechanical brake function can now be monitored with a standard option. You can either monitor the operation or wear or operation and wear.
- A backstop with high locking torque can now lock the rotation of the motor in one direction instead of a brake.
- The C1 profile of the overhead trolley system can now be operated with 4-pole, 1.1 kW drives.
- It is possible to retrofit the protective cover on the fan guard.
- Sensors for temperature detection of the motor winding make for high efficiency of the drive in inverter operation.
SEW-EURODRIVE
+44 (0) 1924 893855
