Two Speed Electric Motors
DUAL WOUND Variable Torque 6/4 - 8/6 - 6/2 - 8/2 POLES
Dual Wound / Variable Torque / Fan Rated two speed electric motors, are ex stock at TEC electric motors. Two speed electric motors by their application reduce energy usage by giving the user the lower speed and hence lower power option, more closely matching actual demand. Variable torque two speed motors are best suited to a Fan or Pump duties. The constant torque 2 speed motor is best suited to crane and machine tool applications. TEC motors are able to offer Constant Torque if required.
TEC are also able to supply suitable control gear – Please see our Inverter and Starters Section!
Two separate windings or dual wound overview:
This is the simplest design because the motor has two distinctly different windings of different polarities within the same lamination pack with each having its own power rating. With each winding totally separated it’s like having two motors within one. This enables motors to be designed with star / delta starting for one or both speeds. This design is also used for those applications where the polarity ratios of pole change are inappropriate.
Two Speed Motor or Frequency Inverter?
The sophisticated frequency inverter can be over kill for many applications partially in simple applications such as fan and pump duties. If all that is required is HIGH and LOW output the two speed electric motor are:
- Generally cost less than Frequency Inverters
- Very simple and hassel free
- Efficient
- Easily installed and commissioned
- Attract capital alowances from the Carbon Trust same as Eff 1 motors
- Are available in EFF1
Standard two speed specification
- Siluminium die cast finned frames cast feet
- Totally enclosed fan cooled
- 132 – 280 frame are cast framed with detachable feet
- Mountings B3, B5, B35, (B14 and B34 up to 132 Frame)
- Metal Terminal Box
- S1 Duty -20 deg to 40 deg – 1000m above sea level
- Voltage 230/400 +/- 10% Delta / Star up to 2.2 kW 400/690 +/- 10% Delta / Star from 3 kW
- Available in EFF1 (EU / CEMEP)
- IP55
- Insulation Class F (Rise B)
- Colour Ral (5010)
Optional Features on Request
- Special voltages
- Specially designed shaft
- Heaters 110V and 240V DC
- Thermal Protective Klixons
- Drip cover (canopy) for shaft down applications
- Special epoxy painting
- Double Shafted
- Directional drain holes
- IP up grades
- Tropicalised windings
Please view our Specials section for more details!
