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Multispeed Three Phase Motors

Multispeed Motors

Multispeed motor is a single motor with different combinations of any of the two or three speeds. Applications of these motors are wide and very beneficial as a single motor can run in different speeds with same output. In Amber dual speed motors any combination of any two poles is possible between 2, 4, 6 and 8 poles. In these motors the power at higher speed is much larger than at lower speed. It is because the torque demanded for this kind of applications varies as the square of the speed. The power ratings of two speed winding can be very different within certain limits which are determined by the torque or power at a certain speed of the driven machine or device by the motor.

In some applications the required torques and powers are identical to each other at different motor speeds for example milling and turning machine applications, also in some applications the required torques and powers can be different for example fan applications. Amber manufactures such motors in all the types of motors with dahlander as well as separate windings whichever is suitable. All the mechanical specifications and dimensions of the Dual speed Amber Motors are same as AN Series or AO Series.


Product specification

  • Range : 0.125/0.18 to 9/11 KW
  • Frame : IEC 71 to 160L
  • Poles : Any two combinations from 2, 4, 6 & 8 Poles
  • Mounting : Foot (B3), Flange (B5), Face (B14) and combinations
  • Protection :IP 55
  • Insulation :F Class
  • Voltage :415 V, 380 V, 220 V or as per requirement
  • Frequency :50 Hz/ 60 Hz or as per requirement
  • Duty :S1
  • Enclosure :TEFC
  • Ambient Temperature:50°C
  • Temperature rise:Class ‘B’ (80ºC)
  • Bearings :SKF Double Sealed Ball Bearings
  • Service Factor :1 to 1.05
  • Range : : 0.125/0.18 KW to 1.5/2.2 KW
  • Frame : IEC 71 to 100L
  • Poles : Any two combinations from 2, 4, 6 & 8 Poles
  • Mounting : Foot (B3), Flange (B5), Face (B14) and combinations
  • Protection :IP 55
  • Insulation :F Class
  • Voltage :415 V, 380 V, 220 V or as per requirement
  • Frequency :50 Hz/ 60 Hz or as per requirement
  • Duty :S1
  • Enclosure :TEFC
  • Ambient Temperature:50°C
  • Temperature rise: Class ‘B’ (80ºC)
  • Bearings:SKF Double Sealed Ball Bearings
  • Service Factor :1 to 1.05