Asynchronous motor for inverter operation

AC Servo motors AL4 Series

With the AL4 series, KEB offers a new asynchronous square motor series that has been specially designed and developed for operation with frequency inverters in accordance with IEC 60034-25. The 3-phase asynchronous motors with cage winding have a 4-pole design and are available in protection classes IP23 and IP54. The current five sizes cover a power range from 0.37 kW to 55 kW.

The AL4 motors, manufactured by Brusatori, have an optimised power-to-size ratio for induction motors and provide excellent dynamic characteristics when the speed or torque changes over a wide speed range. In addition to many industrial applications in machines and systems, the AL4 motors are an ideal replacement for retrofitting DC motors. Apart from the standard configuration, the AL4 series can be customised to meet specific customer requirements, with the design adapted accordingly.

The combination with the COMBIVERT F6 drive controllers creates powerful drive systems in encoderless or encodered versions, which can be completed with pre-assembled encoder cables if required. The system is perfectly harmonised, providing outstanding technical parameters and impressing with high efficiency and simple commissioning.

Highlights

  • Asynchronous servo motors for operation with frequency inverters
  • Excellent dynamics and controllability in a wide speed range
  • Compact and efficient in the power range from 0.37 kW to 55 kW
  • Combined to the servo system with drive controller COMBIVERT F6
  • Universally applicable in machines and systems, replacement for DC drives
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Technical Data

AC servo motors AL4

Height/size Rated speeds nnom[rpm] Nominal torques Mn[Nm]
71/C 1,300 … 3,000 2.5 … 4
80/D 1,300 … 2,900 5 … 8
90/E 1,300 … 3,000 10 … 29
100/G 500 … 3,000 3 … 41
132-IP54/H 1,100 … 3,200 72 … 180
132-IP23/H 1,100 … 3,200 94 … 244

Functions

Properties

Design IM B5 for 71/C, 80/D, 90/E
  IM B35 für 100/G, 132/H
Cooling IC 416 (IP54); IC 06 (IP23)
  according to IEC EN 60034-6
Shaft with feather key
Balancing grade G 2.5 according to ISO 1940-1
  with half key CEI 2-23
Protection class IP54 für 71/C, 80/D, 90/E, 100/G, 132/H
  IP23 für 132/H
Winding insulation class H according to CEI EN 60034-1
Temperature class class F according to CEI EN 60034-1
Thermal protection closed contact 140 + / -5 °C
  max. 250 Vac/ 6 Aac
Temperature ranges Operation: +5 °C bis +40 °C
  Storage: -20°C bis +70 °C
Mounting position all
Colour black RAL 9005

Options

  • Design IM B3 / B35 / B14 for 71/C, 80/D, 90/E
  • Shaft without feather key
  • Roller bearing for 100/G and 132/H
  • Spring-applied holding brake
  • Special winding – voltage / frequency
  • Oil seal A-side
  • Incremental encoder, programmable (from 0 up to 10,000 ppr)
  • Sinus-Encoder 1Vpp – 1024 ppr
  • Absolute encoder Singleturn / Multiturn (Hiperface)
  • Resolver 2-pole, 7 Vrms, transmission ratio 0.5

Documentation

To the manual AL4 / Brusatori VT