Kollmorgen AKM22C-ANMN2-00 AC Brushless Servo Motor – AKM Series

Kollmorgen AKM22C-ANMN2-00 — Permanent Magnet Servo Motor for High-Cycle Precision Motion Axes

The Kollmorgen AKM22C-ANMN2-00 is a frame-size 2 (60 mm flange) AC permanent magnet brushless servo motor from the AKM Series, manufactured by Kollmorgen (Danaher Motion). This model carries winding code C — a medium-voltage winding optimized for 230–480 VAC bus-fed servo drives — and ships without an integrated feedback device or holding brake, giving system architects full latitude to select the feedback technology and safety brake architecture that best matches their application constraints. The motor is rated to IP65 ingress protection with a shaft-end lip seal, Class F insulation (155 °C thermal ceiling), and an ambient operating envelope of 0 °C to +40 °C, making it suitable for deployment in coolant-splash environments, enclosed machine cabinets, and light industrial cleanrooms.

The AKM22C-ANMN2-00 occupies a well-defined position in the AKM product matrix: it delivers a continuous stall torque in the range of 0.48–0.52 N·m with a peak torque multiplier of approximately 3× at rated bus voltage, within a rotor inertia of roughly 0.041 kg·cm². These figures place it in the low-inertia, high-bandwidth segment of the 60 mm servo motor class — a segment where servo loop bandwidths above 1 kHz are achievable with a properly tuned AKD drive, and where settling times below 5 ms are routine in point-to-point indexing applications. The back-EMF constant (Ke) for the C winding is approximately 17–19 V·s/rad (line-to-line, peak), which determines the drive’s DC bus voltage requirement and the motor’s maximum no-load speed ceiling.

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Technical Parameters

Hardware Logical Analysis

The AKM22C-ANMN2-00 is built on Kollmorgen’s segmented stator topology, where individual stator teeth are wound separately before assembly into the stator stack. This approach achieves a copper fill factor above 70% in the slot cross-section — substantially higher than the 55–60% achievable with conventional needle-wound or hand-wound stators of equivalent frame size. The practical consequence is a lower winding resistance per unit torque, which directly reduces I²R copper losses at a given operating point and allows the motor to sustain higher continuous torque without exceeding the Class F thermal limit.

The rotor uses surface-mounted rare-earth (NdFeB) magnets with a sinusoidal flux distribution profile. Kollmorgen achieves this through a combination of magnet arc shaping and stator skew across two slot pitches. The result is a back-EMF waveform with total harmonic distortion (THD) below 3%, which is the primary mechanism suppressing cogging torque to levels below 1% of rated continuous torque. In CNC and semiconductor stage applications, this directly translates to velocity ripple below 0.1% at constant speed — a figure that matters when surface finish or placement accuracy is the binding constraint.

From an EMC standpoint, the motor’s stator laminations are manufactured from silicon steel with a grain-oriented structure, providing a core loss coefficient that limits eddy-current heating at switching frequencies above 8 kHz. The motor housing is a single-piece aluminum alloy extrusion with an integral ground lug, ensuring a low-impedance chassis bond to the machine frame. When paired with a shielded motor power cable (360° shield termination at both ends), the conducted emissions from the motor-drive loop remain within CISPR 11 Class A limits without additional line-side filtering — a meaningful advantage in installations where EMC compliance testing is on the critical path.

The shaft is machined to an h6 tolerance on the 14 mm diameter, compatible with zero-backlash bellows couplings and precision collet-style clamping hubs. Shaft runout is held to ≤0.025 mm TIR at the shaft end, which is the tolerance class required for direct-drive encoder mounting without introducing eccentricity error into the feedback signal. The front bearing is a preloaded angular contact pair; the rear bearing is a deep-groove ball bearing with a wave spring preload to eliminate axial play across the operating temperature range.

System Integration Benefits

• Open Feedback Architecture: The “N” feedback designation means the motor ships without a factory-mounted encoder or resolver. Engineers can mount any feedback device — incremental TTL, SinCos 1 Vpp, EnDat 2.2, BiSS-C, or resolver — directly to the rear shaft stub, enabling reuse of existing feedback infrastructure across machine generations without motor substitution.
• AKD Drive Auto-Configuration: When paired with a Kollmorgen AKD servo drive and WorkBench commissioning software, the motor parameters (Ke, Rs, Ls, J) are loaded from the embedded motor database in under 60 seconds. This eliminates manual parameter entry errors and accelerates first-motion commissioning on the factory floor.
• Deterministic Torque Response: The low rotor inertia (0.041 kg·cm²) combined with the AKD’s 16 kHz current loop update rate produces a torque rise time below 100 µs from command to 90% of target torque. This bandwidth is sufficient to close an outer position loop at 2–4 kHz without stability margin degradation.
• Thermal Transparency: Class F insulation with a 155 °C ceiling provides a 55 °C thermal margin above the 100 °C winding temperature that corresponds to rated continuous operation at 40 °C ambient. This margin accommodates intermittent overload cycles (up to 3× peak torque) without triggering thermal derating, provided the duty cycle keeps average dissipation within the motor’s thermal resistance envelope.
• IP65 Sealing for Wet Environments: The shaft-end lip seal and O-ring sealed connector interface allow direct deployment in machine tool enclosures where coolant mist and wash-down cycles are routine. No additional motor enclosure or protective sleeve is required, reducing mechanical integration complexity.
• Compact 60 mm Footprint: The NEMA 23 / 60 mm flange pattern is the most widely supported mounting interface in the sub-1 N·m servo motor class. Existing machine designs with NEMA 23 stepper motor mounts can be retrofitted with the AKM22C-ANMN2-00 without mechanical rework, provided the shaft diameter and length are verified.
• Drive-Level Diagnostics: When used with an AKD drive, the motor’s operating state (winding temperature via PTC thermistor, encoder health, commutation angle) is continuously monitored and surfaced through the drive’s EtherCAT or CANopen process data objects. Fault conditions are classified and logged with timestamps, enabling root-cause analysis without oscilloscope instrumentation.
• Multi-Axis Scalability: The AKM Series spans frame sizes 2 through 8 with a consistent mechanical interface and winding code convention. A machine design validated with the AKM22C can be scaled to higher torque requirements by substituting a larger AKM frame size without redesigning the drive cabinet, cable routing, or software motion profiles — only the drive current rating and cable cross-section require adjustment.

Quality Assurance & Global Logistics

Every AKM22C-ANMN2-00 unit dispatched from our Xiamen, China facility is sourced through verified industrial automation supply channels and undergoes a structured pre-shipment inspection protocol before release:

• Visual inspection: housing integrity, label legibility, connector pin condition, shaft surface finish
• Part number and date code cross-check against manufacturer documentation and traceability records
• Winding insulation resistance measurement: winding-to-frame ≥100 MΩ at 500 VDC (Megger test)
• Shaft runout verification: ≤0.025 mm TIR at shaft end using a calibrated dial indicator
• Bearing rotation check: manual rotation for smoothness, absence of axial play and radial roughness
• Anti-static packaging with desiccant sachet, foam-lined carton, and moisture indicator card

Shipments are dispatched via DHL Express, FedEx International Priority, or freight forwarding (LCL/FCL) depending on order volume and destination. Standard export documentation — commercial invoice, packing list, certificate of origin, and HS code declaration (HS 8501.52) — is included with every shipment. Transit time to major industrial hubs in Europe, North America, and Southeast Asia is typically 3–7 business days via express courier. All units carry a 12-month warranty from the date of shipment against manufacturing defects.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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