Kollmorgen AKM74P-ACCNR-00 Servo Motor Detailed Product Description

I. Product Overview

AKM74P-ACCNR-00 is a Kollmorgen AKM series 7-frame (188mm IEC flange), 4-stage long rotor, P-level high-voltage brushless synchronous servo motor. The core configuration includes P-level high-voltage winding, IEC standard flange, closed keyway shaft, 16-bit resolver feedback, no electromagnetic brake, integrated forced cooling fan, IP65 protection, standard 00 connector. It features high-voltage large torque, heavy-load continuous output, high-resistance anti-interference of resolver, stable transmission with keyway shaft, strong cooling with fan, high power density, suitable for 480VAC / 640VDC busbars, designed specifically for large-power heavy-load, continuous high-load, harsh industrial environments, and no need for power-off retention in automated scenarios.

II. Model Code Interpretation (AKM74P-ACCNR-00)

AKM: Kollmorgen standard brushless servo motor series

74: 7-frame size (7, 188mm IEC flange)

4: Rotor length (4 stacked segments, long rotor, large torque heavy-load)

P: Winding grade (P-level, high-voltage winding, suitable for 480VAC / 640VDC busbars)

A: Installation method (IEC standard B5 flange, N-level tolerance)

C: Shaft end form (closed keyway shaft, standard keyway transmission)

C: Feedback device (16-bit resolver, single loop, highly reliable, anti-interference)

N: Brake configuration (no electromagnetic brake, no power-off self-locking function)

R: Winding electrical parameters (R-type, standard adaptation)

00: Custom configuration (standard connector, standard wiring, no special customization)

III. Core Technical Parameters

(1) Electrical Parameters

Maximum DC bus voltage: 640VDC

Rated power: 9.7kW (480VAC / 640VDC busbars, with fan enhanced cooling)

Continuous stall torque: 53.0Nm

Peak torque: 143Nm (≈2.7× continuous)

Continuous stall current: 29.0Arms

Peak current: 78.0A

Torque constant: 1.83Nm/A

Reverse electromotive force constant: 118mV/min

Phase-to-phase DC resistance (25℃): approximately 0.40Ω

Rated speed: 3000rpm

Maximum speed: 5000rpm (fan cooling)

Insulation class: F class (155℃)

Winding temperature rise: 100K (relative to 40℃ environment)

Thermal protection: Built-in PTC thermistor (155℃ ± 5% action)

Thermal time constant: approximately 65 minutes (fan enhanced cooling)

(2) Mechanical Parameters

Flange size: 188×188mm (IEC B5)

Shaft diameter: 38mm (closed keyway, standard 10×8×50mm keyway)

Rotor rotational inertia: 0.0125kg·m²

Overall weight: approximately 23.5kg (including fan, without brake)

Bearing life: ≥20000 hours (rated conditions)

Installation direction: arbitrary direction (V1/V3 universal)

Forced cooling: Integrated centrifugal fan (230VAC, independent power supply)

(3) Environment and Protection

Protection grade: Shell IP65, shaft end IP40

Operating temperature: -5℃ ~ +40℃ (altitude ≤1000m)

Storage temperature: -40℃ ~ +85℃

Humidity: 95% RH (no condensation)

Vibration / Shock: Complies with IEC 60068-2-6 / 2-27

Certifications: CE, UL, cURus certification

(4) Feedback and Connection Feedback System: 16-bit rotary transformer (single coil, battery-free, temperature resistance up to 155°C, anti-interference)

Feedback Accuracy: ±45 arc seconds (±0.75 arc minutes)

Connector: 2 rotatable angle M23 connectors (power + feedback separation, 360° adjustable, IP65 sealed)

Adaptor Cable: Kolmosch Standard M23 Power Cable (4×4mm²), Feedback Cable (4×2×0.25mm²)

Fan Wiring: Independent 4-pin M12 connector (230VAC)

Four. Core Product Features

P-class high-voltage super large torque heavy load

P-class high-voltage winding compatible with 480VAC/640VDC, 7-inch large frame + 4-longer-than-normal rotor, 188mm flange output 53.0Nm continuous torque, torque density top-level in the same class, perfectly suitable for large power heavy load, continuous high load, long-term full rotation industrial scenarios.

Integrated fan strong cooling high power density

Standard rear-mounted centrifugal fan (230VAC independent power supply), forced convection cooling, continuous power increase 15% - 20%, thermal time constant extended to 65 minutes, full-load continuous operation without reduction in 40°C environment, solves the bottleneck of heavy-load motor heating.

Rotary Transformer Feedback High Reliability Anti-interference

16-bit rotary transformer without optical components, temperature resistance, moisture resistance, dust resistance, strong vibration resistance, extreme industrial environment zero failure, compatible with high-speed, high-temperature, oil contamination, strong electromagnetic interference scenarios.

Closed key-slot shaft stable transmission

38mm closed key-slot shaft, standard key connection, no slipping during transmission, stable torque transmission, convenient installation, strong versatility, compatible with gearboxes, synchronous belts, couplings, etc. heavy-load transmission structures.

No brake lightweight high dynamic

No electromagnetic brake design, reduces weight, lowers inertia, improves dynamic response, maximum speed 5000rpm, suitable for high-speed positioning, rapid start-stop, non-vertical axis heavy-load applications.

IP65 high protection durability

Fully sealed IP65 housing, F-class insulation, standard 00 sealing connector, dustproof, oilproof, splash-proof, resistant to chemical corrosion, suitable for harsh industrial environments, continuous heavy-load scenarios, MTBF ≥ 50,000 hours.

Angle-connection flexible wiring

2 rotatable angle M23 connectors 360° adjustable, no dead corners in on-site wiring; automatically recognized by AKD driver, parameters self-matched, efficient debugging, significantly shortens equipment development cycle.

Five. Typical Application Scenarios

Heavy machinery: CNC gantry milling machine, vertical lathe, floor boring machine, heavy processing center (super large torque, continuous heavy load, high precision)

Plastic machinery: large injection molding machine, extruder, calendering machine (large torque, continuous high load, stable control)

Rubber machinery: mixing machine, open-molding machine, vulcanization machine (high load, harsh environment, long life)

Printing equipment: large offset printing machine, flexographic printing machine, die-cutting machine (high-speed printing, precise positioning, continuous operation)

Packaging machinery: heavy die-cutting, printing, deviation correction, shearing (heavy load, high-speed, precise positioning)

Automation production line: heavy assembly, robot joints, high-speed conveying (high dynamic, continuous heavy load)

Metal processing: cutting, stamping, bending, sheet rolling (large torque impact, frequent start-stop)

Textile machinery: warp knitting machine, winding machine, setting machine (medium pressure, stable transmission)

Six. Accessories and Selection Suggestions

Compatible driver: Kolmosch AKD series (AKD-P10006, AKD-P12006)

Recommended cables: M23 power cable (4×4mm²), feedback cable (4×2×0.25mm²), fan cable (2×1.0mm²) Optional accessories: shaft end seal (IP65), standard key, flange adapter, fan guard cover, forced ventilation kit

VII. Summary of Product Advantages

AKM74P-ACCNR-00 is the top heavy-duty model in the AKM7 series, featuring high voltage, large torque, long rotor, resolver feedback, keyway shaft, integrated fan, IP65 protection. With 640VDC high voltage adaptation, 53.0Nm large torque, strong cooling fan with high power density, 16-bit resolver high reliability, stable transmission with closed keyway, lightweight without brake, IP65 protection, flexible wiring with angle connectors, it is the core advantage that perfectly meets the industrial automation requirements of ultra-high power heavy-duty, continuous high load, high precision, harsh environment, and no need for power-off retention. It is the preferred solution for top-performance servo control in fields such as heavy machinery, plastic machinery, printing and packaging.