M.1015.6974 Kollmorgen
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The Kollmorgen M.1015.6974 is part of the YSM Brushless Servo Motors series and offers a continuous torque of 0.4 Nm with a peak torque of 0.97 Nm. This motor operates at a maximum speed of 4500 rpm and features an 8-pole count, with a rotor inertia of 0.0000051 kg-m^2. It includes a 2000 pulses per revolution encoder and has a winding voltage of 230 V.
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Product Description:
The M.1015.6974 is a brushless servo motor manufactured by Kollmorgen and supplied within the YSM Brushless Servo Motors series. Intended for light-duty rotary axes in automated pick-and-place rigs, compact conveyors, and indexing fixtures, the motor converts regulated current into repeatable torque while occupying only 88.0 mm of stack length. An integrated optical encoder provides 2,000 pulses per revolution and draws up to 450 mA DC, allowing the drive to close a high-bandwidth control loop around the eight-pole rotor. This feedback supports accurate speed and position control during repetitive movements.
During continuous operation, the unit can deliver 0.4 Nm of shaft torque, while momentary load surges can be handled with a peak capacity of 0.97 Nm. Mechanical output remains stable at speeds up to 4500 rpm, based on the magnetic design and bearing selection. The back electromotive force has a voltage constant of 25 V/krpm, which helps with drive sizing so induced voltage remains within transistor limits at maximum speed. The stator coils have a winding inductance of 11.5 mH, which affects current-loop bandwidth and the response to commanded torque changes. At the rated winding voltage of 230 V, the sine-wave torque constant is 0.20 Nm/A, while the square-wave torque constant is 0.22 Nm/A. These constants support drive-current calculations for sinusoidal and six-step commutation.
The rotor has an inertia of 0.0000051 kg·m², permitting fast acceleration without excessive drive current. Copper losses are influenced by a winding resistance of 8.9 Ω, and heat is transferred to the housing through a thermal path with a resistance of 2.2 °C/W. The insulation has a dielectric withstand rating of 1500 VAC rms between the windings and case, supporting operation with floating or grounded drives. Proper thermal contact with the mounting surface helps the housing dissipate winding heat during sustained operation. The compact stack length allows the motor to fit space-limited machinery without sacrificing encoder-based motion control.
