Product Short Description

Product Name:​ Kollmorgen 6SM57M‑3.000 Brushless Permanent‑Magnet Synchronous Servo Motor
Overview:
A 57‑mm‑frame, high‑torque brushless servo motor for dynamic positioning applications.
Technical Specifications:
  • Series:​ Kollmorgen 6SM (Seidel line)

Description

  • Motor type:​ 3‑phase, 6‑pole brushless permanent‑magnet synchronous servo
  • Rated power:​ 1.4 kW (1.9 hp)
  • Rated speed:​ 3000 rpm
  • Rated torque:​ 3.0 N·m
  • Peak torque:​ 9.0 N·m (limited by drive current)
  • Standstill torque:​ 3.0 N·m
  • Rated current:​ 4.3 A RMS
  • Standstill current:​ 2.3 A RMS
  • Peak current:​ 11 A RMS
  • Torque constant (K_T):​ 1.65 N·m/A (line‑to‑line)
  • Voltage constant (K_E):​ 97 mV/min (back‑EMF)
  • Winding resistance (R₂₀):​ 6.3 Ω (line‑to‑line)
  • Winding inductance (L):​ 35 mH (line‑to‑line)
  • Rotor inertia:​ 0.42 × 10⁻⁴ kg·m² (0.42 kg·cm²)
  • Mechanical time constant:​ ≈2.5 ms
  • Thermal time constant:​ 20 min (winding), 45 min (housing)
  • Insulation class:​ F (155 °C) with Class B temperature rise (80 K)
  • Protection class:​ IP65
  • Vibration class:​ N (per DIN EN 60034‑14)
  • Mounting:​ IEC 57 mm square flange, 14 mm keyed shaft (smooth optional)
  • Shaft load:​ 150 N radial (max at shaft end), 90 N axial
  • Brake option:​ 24 V DC spring‑applied disc brake (‑G suffix), 3.8 A inrush, 0.5 A holding
  • Feedback:​ Resolver (2‑pole standard) or incremental encoder (optional)
  • Operating temperature:​ 0 °C to +40 °C ambient (derate above 40 °C)
  • Storage temperature:​ –20 °C to +70 °C
  • Weight:​ ≈3.8 kg (without brake); 4.5 kg with brake
  • Dimensions:​ 57 × 57 mm flange, ≈200 mm length (with brake)
  • Compatible drives:​ Kollmorgen Servostar CD/S300/S600, Digifas series, third‑party 400 V‑class servo amplifiers
Features:
High torque density (3 N·m continuous, 9 N·m peak); low cogging for smooth motion; integrated resolver; IP65 ruggedness; optional holding brake.
Application Scenarios:
Material handling, conveyor systems, positioning axes requiring moderate torque at medium speed with fast acceleration/deceleration; robotic joints; index tables; CNC auxiliary axes.
Construction & Material:
Cast‑aluminum IP65 housing; NdFeB rotor magnets; built‑in resolver; optional spring‑applied brake.
Working Principle:
Three‑phase sinusoidal currents produce a rotating magnetic field that interacts with the permanent‑magnet rotor; resolver feedback closes the position/speed loop in the servo amplifier.
Installation Requirements:
Flange‑mount on IEC 57 mm square flange; align keyed shaft with coupling; wire power (shielded) and resolver (shielded twisted pair) separately; connect thermostat to drive; if brake option, supply 24 V DC release voltage.
Precautions:
  • Operate only within 0‑40 °C ambient unless derated.
  • Brake releases only when 24 V DC is applied; loss of power engages brake.
  • Do not exceed shaft load limits (150 N radial / 90 N axial).
  • Use properly sized servo amplifier to achieve peak‑torque without overheating.
  • Ensure adequate ventilation; monitor winding temperature via drive.

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