Product Description:

Kollmorgen’s CH042B-13-3105 belongs to the Cartridge DDR Motors series and functions as a permanent-magnet, direct-drive rotary servo package. The cartridge concept combines a factory-aligned bearing system with a hollow shaft so the motor can be clamped directly to the machine frame in minutes, eliminating couplings and belts. Operating from a 400/480 VAC bus and using digital EnDAT feedback, it supplies precise position and velocity data to the drive. In typical automation cells, the unit replaces traditional gearbox stages on indexing tables, material-handling spindles, and electronic assembly axes.

Physical and electrical ratings describe how the motor behaves during dynamic moves. The stator outside diameter is 108 mm, and the assembly mass is 5.67 kg, so mounting loads on small fixtures are possible without reinforcing the frame. When rapid acceleration is required, the drive may deliver a peak current of 27.6 A; at that value, the electromagnetic circuit can generate 22.8 Nm of peak torque for short bursts. Continuous performance is shaped by a torque constant of 0.93 Nm/A, meaning nearly one newton-meter is produced for every ampere of phase current. The sealed housing prevents coolant mist or abrasive dust from entering, and the ten-pole rotor combines with the digital feedback interface to maintain sub-arc-minute positioning accuracy.

At zero speed, the motor draws 9.19 A of standstill current to sustain 8.46 Nm of continuous holding torque, overcoming a static friction of 0.066 Nm at the bearing cartridge. The rotor’s reflected inertia is 8.87 kgcm², keeping servo loop gains high while still allowing smooth reversal cycles. The electrical response is influenced by the phase inductance of 5.0 mH and a winding resistance of 0.96 Ω, which together limit heat rise when the supply bus modulates rapidly. A voltage constant of 56.1 mV per min⁻¹ assists the drive in estimating back-EMF during sensor checks.