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M-805-A-31-B3 by Kollmorgen

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The Kollmorgen M-805-A-31-B3 servo motor is a high-performance member of the M Goldline Servo Motors series, designed for demanding industrial automation applications. Manufactured by Kollmorgen, this model delivers a robust rated power of 10.8 kW (14.5 Hp) with a speed at rated power of 1500 RPM. Its combination of substantial continuous torque and high peak torque makes it well suited for heavy-duty motion control tasks. The M-805-A-31-B3 supports continuous operation cycles with reliable thermal stability, offering precision speed regulation and repeatable positioning. This device embodies the strength and durability necessary for integration into modern manufacturing and process systems.

In terms of technical specifications, the M-805-A-31-B3 presents a comprehensive parameter set: it produces a continuous torque at 25°C of 83.4 N-m and a slightly derated continuous torque at 40°C of 78.6 N-m to maintain thermal reliability; its peak torque of 232.0 N-m ensures brief high-load handling capability. Electrical characteristics include a back EMF (line-to-line) of 136.0 VRMS/kRPM, DC resistance at 25°C (line-to-line) of 0.230 Ohms, and an inductance (line-to-line) of 13.0 mH. Voltage and current ratings encompass a maximum line-to-line volts of 250 VRMS, continuous line current of 35.0 Amps RMS, and a peak line current of 109 Amps RMS. Mechanical inertia is optimized with a rotor inertia of 0.00840 kg·m² (0.00620 lb-ft·sec²), while the torque sensitivity of 2.25 N-m/Amp RMS (1.66 lb-ft/Amp RMS) enables precise torque control. The motor’s maximum operating speed of 1500 RPM aligns with its rated speed, minimizing wasted capacity and simplifying drive tuning.

Operationally, the M-805-A-31-B3 offers refined performance through its low rotor inertia and high torque sensitivity, yielding rapid acceleration and deceleration profiles that reduce cycle times. Thermal management is enhanced by its consistent torque output across standard industrial temperature ranges, ensuring sustained operation in processes with elevated ambient heat. The balanced electrical design, including carefully matched back EMF, resistance, and inductance values, delivers smooth current flow and minimizes torque ripple. Continuous-duty reliability is supported by Kollmorgen’s quality construction, enabling extended service intervals and predictable maintenance schedules. This motor excels in maintaining position accuracy under varying load conditions, critical for precision assembly and dynamic motion sequences.

System integration is straightforward within current automation architectures, leveraging industry-standard drive compatibility and straightforward parameter configuration. The M-805-A-31-B3 is ideally suited for applications such as robotic manipulators, conveyor drives, packaging machinery, printing presses, and CNC feeding systems. Its robust build quality and scalable performance make it an excellent choice for OEMs seeking a dependable solution for retrofits or new machine designs. By combining high power density, precise control, and thermal robustness, the Kollmorgen M-805-A-31-B3 servo motor addresses the stringent demands of contemporary industrial automation environments.

Technical Specifications

Back Emf (line-to-line)
136.0 VRMS / kRPM
Continuous Line Current
35.0 Amps RMS
Continuous Torque At 25°c
83.4 N-m (61.5 lb-ft)
Continuous Torque At 40°c
78.6 N-m (58.0 lb-ft)
Dc Resistance At 25°c (line-to-line)
0.230 Ohms
Inductance (line-to-line)
13.0 mH
Max Line-to-line Volts
250 Volts RMS
Maximum Operating Speed
1500 RPM
Peak Line Current
109 Amps RMS
Peak Torque
232.0 N-m (171.0 lb-ft)
Rated Horsepower (hp)
14.5 HP
Rated Power (kw)
10.8 kW
Rotor Inertia
0.00620 lb-ft-sec² (0.00840 kg-m²)
Speed At Rated Power
1500 RPM
Torque Sensitivity
2.25 N-m / Amp RMS (1.66 lb-ft / Amp RMS)

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