M-205-B-29-247 Kollmorgen
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The Kollmorgen M-205-B-29-247 is a servo motor in the M Goldline Servo Motors series that delivers a rated power of 1.6 kW and a rated speed of 3600 RPM. It produces a continuous torque of 4.7 N-m at 25°C and has a peak torque of 13.8 N-m. The motor has a back EMF of 51.2 VRMS per kRPM and weighs 7.3 kg.
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Product Description:
The M-205-B-29-247 belongs to the M Goldline Servo Motors series manufactured by Kollmorgen. It is a brushless servo motor intended for closed-loop motion axes in packaging lines, pick-and-place gantries, and other high-response industrial automation equipment. By combining a low-inertia rotor with a permanent-magnet field, the motor converts drive current into precise rotary torque and velocity under digital control. Because the design is brushless, it avoids mechanical commutator wear and supports repeatable operation during frequent starts, stops, and reversals.
The motor achieves a rated shaft speed of 3600 rpm while delivering a continuous stall torque of 4.7 N·m at 25 °C, allowing constant force during normal operation without excess heating. Sustaining that torque requires only 5.3 A RMS of line current, which keeps amplifier sizing moderate. The winding set withstands a bus potential up to 250 VRMS, making the unit compatible with many common three-phase servo drives. Its phase inductance is 38.0 mH, which shapes the electrical time constant, filters current ripple, and supports stable control loops. Additional characteristics include 51.2 VRMS/kRPM back EMF, 2.48 Ω resistance, and a four-pole magnetic structure, which affect voltage demand and commutation frequency. At 40 °C ambient, the continuous torque capability falls slightly to 4.47 N·m because of thermal limits, but rated mechanical power remains 1.6 kW at full speed.
During rapid indexing moves, the motor can produce a peak torque of 13.8 N·m while drawing up to 17.2 A RMS, supporting quick acceleration profiles. The laminated rotor carries an inertia of only 0.001143 kg·m², which works with the 12100 rad/s² theoretical acceleration figure to shorten cycle times and reduce following error. Total mass is 7.3 kg, light enough for compact axes while still supporting heat dissipation. A torque sensitivity of 0.85 N·m/A RMS lets current feedback scale directly to output torque and provides predictable force production across the full load range. This combination supports responsive motion where load changes and short positioning cycles are common.
