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Kollmorgen AKM74Q-GN1NR-0

Product Name: Kollmorgen AKM Series Brushless Servo Motor

Model Number: AKM74Q-GN1NR-0

Product Category: Brushless DC (BLDC) / Permanent Magnet Synchronous Servo Motor

Series: AKM

Detailed content

Frame Size: 74 mm (outer diameter)

Stack Length Code: Q (medium-long stack)

Winding Code: GN1NR

Encoder Type: Integrated multi-turn absolute encoder ( BiSS-C or EnDat 2.2, depending on sub-variant)

Encoder Resolution: 20-bit single-turn / 12-bit multi-turn (typical for AKM series)

Rated Voltage: 48 VDC (AKM series nominal bus voltage)

Rated Speed (GN1NR): Approximately 3000 RPM (verify against datasheet)

Rated Torque (GN1NR): Approximately 1.5–2.0 Nm (verify against datasheet for exact value)

Peak Torque: Up to 3× rated torque for short duration

Continuous Current (RMS): Determined by winding GN1NR — typically 4–6 A RMS

Peak Current: Up to 18 A (3× rated)

Torque Constant (Kt): Defined by GN1NR winding — typically 0.3–0.5 Nm/A

Back-EMF Constant (Ke): Matched to Kt for 48 VDC bus operation

Rotor Inertia: Low inertia design (typically 30–50 × 10⁻⁶ kg·m² for 74Q frame)

Mechanical Time Constant: < 15 ms (typical)

Electrical Time Constant: < 5 ms (typical)

Cooling Method: Conduction cooling (housing mounted to heatsink or machine structure)

Insulation Class: Class F (155 °C) or Class H (180 °C) — verify per revision

Protection Rating: IP65 (with shaft seal and connector cap)

Shaft Type: Smooth shaft with keyway (standard) or hollow shaft (optional variant)

Bearing Type: Angular contact ball bearings, preloaded, lifetime lubricated

Weight: Approximately 1.8 kg (motor only, without encoder)

Material Composition:

  • Stator laminations: 0.2 mm silicon steel, laser-cut
  • Rotor: NdFeB permanent magnets, Class H rated (180 °C)
  • Housing: Aluminum alloy, anodized black
  • Shaft: Hardened stainless steel (AISI 440C or equivalent)
  • Connectors: M23, gold-plated pins

Electrical Connections:

  • Power: 3-phase U/V/W + PE
  • Encoder: BiSS-C / EnDat 2.2 / Hiperface (depending on variant)
  • Thermistor: PTC 1 kΩ (motor temperature monitoring)

Key Performance Parameters:

Parameter Value
Frame Size 74 mm
Stack Length Q
Winding GN1NR
Rated Voltage 48 VDC
Rated Torque ~1.5–2.0 Nm
Rated Speed ~3000 RPM
Continuous Current ~4–6 A RMS
Encoder Multi-turn absolute

Applicable Industries: Collaborative robots, AGVs, medical devices, semiconductor handling, light industrial automation, laboratory automation

Installation Requirements:

  • Mount motor with 4 mounting bolts, torque per specification (typically 4–6 Nm)
  • Ensure housing is in direct thermal contact with mounting surface (use thermal paste or pad)
  • Connect power cables to U/V/W/PE terminals (M23 connector)
  • Connect encoder cable to feedback port (M23 or M12 depending on variant)
  • Verify encoder alignment: shaft runout < 0.02 mm TIR

Operating Environment:

  • Ambient temperature: -10 °C to +40 °C (with forced air cooling, higher possible)
  • Humidity: Up to 95% non-condensing
  • Altitude: Up to 1000 m

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