The simple way of controlling machine and plant speeds economically: 2-speed motors. We offer pole-changing DR.. series AC motors with a power combination from 0.15 kW / 0.20 kW to 18 kW / 34 kW. With this large selection, you are sure to find the suitable motor for your application.
2 speeds with a ratio of 1:2 or 1:4
We supply pole-changing 2-speed AC motors in sizes and designs DR63 and DRS.. as 4/2 and 8/4-pole motors with speeds in a ratio of 1:2 and as 8/2-pole motors with speeds in a ratio of 1:4 (DRS.. only).
These motors also come from our modular system – take advantage of its benefits: for example, we offer pole-changing AC motors for countries with a 50 Hz or 60 Hz line frequency, with the required voltage of course. Our pole-changing motors naturally come with all the certifications required by international regulations, so you can use them anywhere in the world, for example in Canada (CAS certification), the USA (UR certification) or in China (CCC certification).
We also offer a wide range of additional features so that you can find the perfect drives to match your applications. For example, with three different brake sizes for each motor frame size, you can size the brake to ensure that braking brings the drive to a halt safely and only as fast as necessary.
Our range of pole-changing AC motors mean that you can save time and optimize your motor selection, ordering and delivery processes. As a Global Player, we offer you this range of products in 51 countries around the world.
Only half the solution without a gear unit? Then you can use our modular system to combine our DR63 and DRS.. series 2-speed pole-changing AC motors with a helical, parallel shaft, worm, bevel or SPIROPLAN® gear unit of your choice. All these gear unit types are already available serially, combined as standard gearmotors.
Configure your own product
- Detailed information about your individual product
- CAD data and documentation for your configuration
Your benefits
-
2 speeds in one motor,
allow you to reduce the motion sequences in plants and machines with two or four times the motor speed.
Properties
- Simple winding changeover switching gives you two motor speeds
- Pole-changing motors are a simple and economic option for applications that need "only" 2 speeds
- Pole-changing motors are not subject to globally applicable efficiency standards, even if only one of the two speeds is continually in use
- A wide variety of additional features in the SEW‑EURODRIVE modular motor system and various speed ratios (1:2 and 1:4) offer you many potential uses
- We develop pole-changing motors ourselves according to our own proven modular system and manufacture them according to our own quality standards, even in our series production.
Technical data for example 400 V / line frequency 50 Hz
Speed ratios of 1:2
4/2-pole motors
Operating mode S1
| Motor type DR63 |
PN kW |
MN Nm |
nN 1/min |
IN A |
|---|---|---|---|---|
| DR63M 4/2 | 0.15 0.2 |
1.05 0.71 |
1 370 2 710 |
0.55 0.53 |
| DR63L 4/2 | 0.2 0.28 |
1.39 0.99 |
1 370 2 710 |
0.67 0.67 |
8/4-pole motors
Operating mode S1
| Motor type DRS.. |
PN kW |
MN Nm |
nN 1/min |
IN A |
|---|---|---|---|---|
| DRS71S 8/2 | 0.06 0.5 |
0.84 0.83 |
685 2 870 |
0.48 0.98 |
| DRS71M 8/2 | 0.1 0.4 |
1.43 1.34 |
670 2 840 |
0.66 1.04 |
| DRS80S 8/2 | 0.15 0.6 |
2.15 2.1 |
670 2 710 |
0.95 1.9 |
| DRS80M 8/2 | 0.22 0.9 |
3.1 3.1 |
680 2 780 |
1.15 2.4 |
| DRS90M 8/2 | 0.3 1.3 |
4.05 4.3 |
710 2 880 |
1.41 3.3 |
| DRS90L 8/2 | 0.45 1.8 |
6 5.9 |
720 2 905 |
2.5 4.7 |
| DRS100M 8/2 | 0.6 2.4 |
8.1 7.9 |
710 2 890 |
3.1 5.4 |
| DRS112M 8/2 | 0.8 3 |
10.8 10.4 |
710 2 750 |
4.2 6.7 |
| DRS132M 8/2 | 1.1 4.6 |
14.8 15.7 |
710 2 800 |
4.6 8.5 |
Speed ratios of 1:2
8/2-pole motors
Operating mode S3 40/60%
| Motor type DRS.. |
PN kW |
MN Nm |
nN 1/min |
IN A |
|---|---|---|---|---|
| DRS71S 8/4 | 0.1 0.18 |
1.39 1.23 |
685 1 400 |
0.49 0.52 |
| DRS71M 8/4 | 0.16 0.3 |
2.25 2.05 |
685 1 400 |
0.71 0.79 |
| DRS80M 8/4 | 0.22 0.4 |
2.95 2.65 |
710 1 440 |
0.98 0.98 |
| DRS90M 8/4 | 0.3 0.6 |
4.05 4 |
710 1 440 |
1.44 1.42 |
| DRS90L 8/4 | 0.44 0.88 |
6 5.9 |
700 1 425 |
1.9 1.98 |
| DRS100M 8/4 | 0.66 1.3 |
9.1 8.7 |
690 1 420 |
2.65 2.9 |
| DRS100L 8/4 | 0.9 1.8 |
12.5 12.2 |
690 1 410 |
3.5 4 |
| DRS112M 8/4 | 1.2 2.2 |
17 15.1 |
675 1 390 |
4.2 4.6 |
| DRS132S 8/4 | 1.6 3.3 |
22.5 23 |
680 1 385 |
5.8 6.8 |
| DRS132M 8/4 | 2.1 4.2 |
29.5 29 |
680 1 390 |
7 8.6 |
| DRS160S 8/4 | 2.7 5.5 |
35.5 35.5 |
725 1 470 |
9.2 11 |
| DRS160M 8/4 | 3.8 7.5 |
49.5 48.5 |
730 1 470 |
12.9 15 |
| DRS180S 8/4 | 5.5 10 |
75 65 |
730 1 465 |
17.4 18.7 |
| DRS180L 8/4 | 7.5 15 |
97 97 |
135 1 470 |
22.5 27.5 |
| DRS200L 8/4 | 11 22 |
143 142 |
735 1 475 |
35 41.5 |
| DRS225S 8/4 | 14 28 |
182 181 |
735 1 475 |
45 52 |
| DRS225M 8/4 | 18 34 |
230 220 |
740 1 475 |
57 63 |
Additional features
Drive designs
| Type | Product and catalog designation |
|---|---|
| IEC foot-mounted motor |
/FI |
| IEC flange-mounted motor with bore |
/FF |
| IEC flange-mounted motor with thread |
/FT |
| General flange-mounted motor (differing from IEC) |
/FL |
| Integral motor (Stand-alone motor without gear unit) |
/FG |
| IEC flange-mounted motor with bore and IEC foot mountings |
/FE |
| IEC flange-mounted motor with thread and IEC foot mountings |
/FY |
| General flange-mounted motor (differing from IEC) with foot mountings |
/FK |
Mechanical attachments
| Type | Product and catalog designation |
|---|---|
| Brake | /BE.. (with size specifications) |
| Manual brake release | /HF or /HR |
| Backstop (blocking without direction of rotation) |
/RS |
| B-side shaft end, Second shaft end |
/2W |
| Drain outlet(s) for condensation |
/DH |
Ventilation
| Type | Product and catalog designation |
|---|---|
| Flywheel fan (made of gray cast iron) |
/Z |
| Metal fan (made of aluminum) |
/AL |
| Without fan (no fan/non-ventilated) |
/U |
| B-side closed (no fan/non-ventilated) |
/OL |
| Forced cooling fan | /V |
| Canopy | /C |
| Low noise fan guard | /LN |
Connection
| Type | Product and catalog designation |
|---|---|
| SEW-EURODRIVE plug connector | /IS or /ISU (only motor-side plug connector) |
| Harting plug connector: HAN 10 ES |
/AS.. (with interlocking and wiring diagram specifications) |
| Harting plug connector: HAN MODULAR |
/AB..; / AC.., / AD.., / AK, / AM (with interlocking and wiring diagram specifications) |
| Plug connector (general) | /IV |
| Terminal strip with cage clamp | /KCC |
| Terminal strip with cage clamp for electrified monorail drives | /KC1 (C1 profile) |
Velocity feedback through encoder mounting
| Type | Product and catalog designation |
|---|---|
| Built-in encoders | /EI7. (with number of pulses identifier) |
| Add-on encoder for DR63 | /EH1. (with electric interface identifier) |
| Add-on encoder for DRS.. (motor sizes 71 – 132) | /ES7., /AS7. (with electric interface identifier) |
| Add-on encoder for DRS.. (motor sizes 160 – 225) | /EG7., /AG7. (with electric interface identifier) |
| Customer-side encoder extension | /XV.., /XH.. (with mechanical and electric interface identifier) |
Thermal overload identification
| Type | Product and catalog designation |
|---|---|
| Three bimetallic switches, one sensor for each motor phase |
/TH |
| Three PTC thermistors (PTC resistors), one sensor for each motor phase |
/TF |
| Temperature sensor KTY84 – 130 | /KY |
| Temperature sensor PT100 | /PT |
| Three PT100 temperature sensors, one sensor for each motor phase |
/PT |
Areas of operation
- Example 1:
To limit the mechanical load during startup, the low speed is used and then quickly switched to the high operating speed without stopping. Just before the target, the system initially switches to the lower speed to avoid missing the target position, then the drive is switched off and, in many cases, brought to a complete standstill by a brake (rapid/creep speed positioning). This type of application is used in the horizontal drives and hoists of cranes, for example. - Example 2:
Continually transporting materials in just one direction results in very different load conditions for the drive's two directions of rotation. To optimize the time the no-load return travel takes, the system switches to the higher speed and returns to the start point. This type of application is used in inclined conveyors for building materials, bulk material, etc., or cable cars and rotary tables. - Example 3:
Stepped speeds are used to handle highly variable amounts of transport goods to reduce the strain on machinery and system components. This type of application is used in conveyor belts for building materials, bulk material, packages, etc.
