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Permanent magnet motors

The permanent magnet motor range extends the effective nominal speed range of the rugged industry workhorses down to 100 – 850 r/min. The motors can simplify drive systems by effectively eliminating the need of speed reduction devices. They are designed exclusively for frequency converter supply, where they provide high speed accuracy even without speed sensors because they are synchronous motors without rotor slip.

Features

  • Torque range 1000 to 50 000 Nm
  • Construction based on standard induction motor design
  • Rotor magnetization by permanent magnets
  • Totally enclosed IP 55 construction
  • Air- or liquid cooled

The most common present drive systems, which permanent magnet motor solution could replace:
  • Traditional AC motor, frequency converter and gear box combination
  • Traditional slow speed AC motor, typically 10-16-pole or slower with frequency converter
  • Variable speed DC drive system with gear box
Output power 0 - 220 r/min, 17 - 1120 kW at 220 r/min
0 - 300 r/min, 25 - 1600 kW at 300 r/min
0 - 430 r/min, 38 - 2240 kW at 430 r/min
0 - 600 r/min, 57 - 2500 kW at 600 r/min
Frame size IEC 280 to 560
Frame material Cast iron/Welded steel
Voltages All voltages
Protection IP 55
Cooling Air or liquid

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