Digital guide
You are here:
Kollmorgen AKM51K-ACCNR-0
Product Introduction:
The AKM series is Kollmorgen’s flagship brushless servo motor family offering high torque density, low cogging, and a wide selection of windings, feedback devices, and connector options. The AKM51K frame (Size 51) delivers medium-to-high continuous torque in a compact, thermally optimized housing. This variant includes resolver feedback, smooth shaft, and M23 SpeedTec connectors.
Detailed content
Technical Specifications:
-
Rated Power: 1.35 kW (at 320 VDC bus) / 1.09 kW (at 160 VDC bus)
-
Stall Torque (Continuous): 4.9 Nm (43.37 lb-in)
-
Rated Torque: 2.0 Nm (at 320 VDC bus)
-
Peak Torque: 11.9 Nm
-
Rated Speed: up to 6000 rpm (at 320 VDC bus)
-
Max DC Bus Voltage: 320 VDC
-
Continuous Current: 9.4 Arms (at 100°C winding ΔT, stall)
-
Rotor Moment of Inertia: 3.42 × 10⁻⁴ kg·m² (3.42 kg·cm²)
-
Feedback: 2-pole resolver (pre-assembled, 16-bit equivalent)
-
Shaft: Smooth (keyless), Ø24 mm, with through-hole option
-
Mounting Flange: 108 × 108 mm IEC metric flange (tolerance N)
-
Connectors: 2 × angled rotatable M23 Speed Tec connectors
-
Protection: IP65 (with proper mating connector)
-
Thermal Protection: PTC thermistor
-
Insulation Class: F (155°C)
-
Ambient Temperature: 0 … +40 °C (rated), up to +55 °C derated
-
Weight: approx. 6.5–7.5 kg (depending on options)
Construction & Materials:
-
Laminated silicon-steel stator core, rare-earth Neodymium-Iron-Boron (NdFeB) magnets in rotor
-
Black painted steel or aluminum housing (dark grey/black typical)
-
Sealed bearings, grease-lubricated for life
Working Principle:
Three-phase sinusoidal PWM-driven BLDC/PMSM with resolver feedback for closed-loop commutation via a compatible Kollmorgen servo drive (AKD, S700, S400 families).
Installation & Notes:
-
Mount via 4 × M8 bolts on IEC flange; ensure proper grounding via motor PE terminal.
-
Use Kollmorgen mating M23 connectors; tighten to specified torque.
-
Do not disconnect motor phases while drive is powered.
-
Ensure adequate ventilation; check thermal derating above 40 °C.
Typical Applications: Packaging machinery, printing presses, semiconductor handling, CNC auxiliary axes, robotic joints.
