M.1015.7894 Kollmorgen
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The Kollmorgen M.1015.7894 is a brushless servo motor from the FSM Brushless Servo Motors series, featuring a continuous torque of 27.7 Nm and a peak torque of 56.5 Nm. It has a spring-set holding brake with a brake voltage of 90 VDC and weighs 43.2 kilograms. The motor measures 490 mm in overall length, has a shaft diameter of 35 mm, and a bolt circle diameter of 200 mm.
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Product Description:
The M.1015.7894 is a brushless servo motor manufactured by Kollmorgen within the FSM Brushless Servo Motors series. As a rotary actuator, it converts drive current from a matched amplifier into controlled angular motion, allowing indexing tables, gantry axes, and packaging machinery to follow precise position or velocity profiles under closed-loop feedback. Its spring-set holding brake secures loads whenever power is removed, making the unit suitable for vertical or safety-critical axes in automated cells.
Rated for a continuous shaft output of 27.7 Nm, the motor can accelerate machinery with a peak capability of 56.5 Nm during short duty cycles. Electromagnetic conversion efficiency is reflected by a torque constant of 0.73 Nm/A; each ampere of phase current therefore yields nearly three-quarters of a newton-meter. Back EMF rises at 89 V/kRPM, a value the drive must overcome to sustain high speed, while the stator’s electrical dynamics are shaped by a phase inductance of 1.1 mH. These parameters affect current-loop bandwidth, allowable bus voltage, and amplifier thermal loading during rapid reversals.
The rotor inertia is 0.01626 kg·m², which balances fast response with stable operation on medium-mass loads. Installation uses a 200 mm bolt circle and a 173 mm pilot, and the keyed 35 mm shaft accepts a 10 × 8 mm key for positive torque transfer. Total mass is 43.2 kg, and the overall length is 490 mm; these values affect mounting reinforcement and load alignment. The spring-set brake is released with 90 VDC, eliminating the need for separate hydraulic clamps. Coil copper losses are affected by a winding resistance of 0.16 Ω, which the drive uses to predict temperature rise during continuous operation.
