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Kollmorgen AKM44E-EKMNR-00

Product Description:​
High torque-density, low-cogging 3-phase PMSM servo motor. The “44E” denotes frame 44 with winding E (medium voltage, moderate current). “K” = resolver feedback (16-bit typical) or smart feedback depending on exact sub-suffix; “M” = metric mounting; “N” = no brake; “R” = smooth shaft (no keyway). M23 SpeedTec rotatable connectors.
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Detailed content

Performance Parameters (typical for AKM44E @ 100 °C winding rise):
  • Stall Torque (Continuous):​ 5.76 Nm (51 lb-in)
  • Continuous Current @ Stall:​ 2.9 A RMS (ΔT = 100 °C)
  • Peak Torque:​ 19.9 Nm
  • Peak Current:​ 11.4 A RMS
  • Rated Speed (max mechanical):​ 6000 rpm
  • Nominal Bus Voltage:​ 320 V DC (typical); Max Bus Voltage: 640 V DC
  • Rotor Moment of Inertia:​ approx. 2.73 × 10⁻⁴ kg·m² (2.73 kg·cm²)
  • Winding Resistance / Inductance:​ Per individual datasheet (typical L ≈ few mH)
  • Torque Constant (Kt):​ approx. 1.99 Nm/A (RMS)
  • Back-EMF Constant (Ke):​ approx. 118 Vpk/krpm
  • Number of Pole Pairs:​ 5 (10 poles)
  • Thermal Time Constant (winding):​ approx. 18–25 min
  • Motor Feedback:​ Typically resolver (single-speed or multi-speed) or SFD/EnDat depending on exact sub-suffix — verify from full 2nd-half of part number
  • Holding Brake:​ None (“N” in brake position)
  • Shaft:​ Smooth (no keyway), Ø19 mm or Ø14 mm depending on pilot diameter variant; length per AKM44 standard
  • Flange:​ 84 × 84 mm (IEC 72-1metric B5 style), 4 × M6 mounting holes on 100 mm BCD
  • Degree of Protection:​ IP54 standard (IP65 with shaft seal option — check if “R” includes seal)
  • Insulation Class:​ F (155 °C)
  • Connectors:​ 2 × M23 angled/rotatable SpeedTec connectors (Power + Feedback)
  • Approvals:​ CE, cURus, UL
  • Weight:​ approx. 5.6–6.0 kg (depending on connector orientation)
Construction & Materials:
  • Stator: Laminated silicon steel, Class F copper windings
  • Rotor: Rare-earth Neodymium-Iron-Boron (NdFeB) magnets
  • Housing: Anodized aluminum alloy
  • Shaft: Hardened steel, ground finish
  • Bearings: Precision ball bearings, greased for life
Installation Notes:
  • Align motor flange perpendicular to load coupling; avoid side loads > specified radial/thrust limits.
  • Connect shield of power and feedback cables to PE at drive end; keep separated from high-power lines.
  • If brake option absent, ensure mechanical holding for vertical axes.
  • Motor recognized automatically by AKD/S700 drives via feedback device.

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