M-203-C-33 Kollmorgen
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The Kollmorgen M-203-C-33 is a servo motor in the M Goldline Servo Motors series with a continuous stall torque of 2.44 Newton-meters and a continuous stall current of 5 Arms. It has a peak stall torque of 7.65 Newton-meters and a peak stall current of 16.6 Arms. The motor weighs 5 kilograms and features a back EMF constant of 29.4 Vrms per kRPM.
Internal Product Review
The M-203-C-33 is a Kollmorgen M Goldline servo motor with 2.44 N-m continuous stall torque and 5 Arms continuous stall current. Peak output looks especially strong, with 7.65 N-m peak stall torque and 16.6 Arms peak stall current for demanding motion profiles. Thermal behavior remains well controlled with 0.87 °C/W thermal resistance, making the motor a strong choice for consistent servo performance.
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Product Description:
The M-203-C-33 is a permanent-magnet brushless servo motor produced by Kollmorgen within the M Goldline Servo Motors series. It is intended to generate controlled torque and speed for industrial automation axes that require rapid response and repeatable positioning. The compact housing and flange pattern let machine builders integrate the unit into tight spaces while maintaining the dynamic response associated with the Goldline platform. When paired with a digital PWM amplifier, the motor supports fine contouring in printing, packaging, and semiconductor tools where smooth motion profiles directly influence process accuracy.
Under steady operation, the winding draws 5 A rms to deliver a continuous stall torque of 2.44 N·m. For rapid starts or shock loads, the drive can command 16.6 A rms, increasing the available stall torque to 7.65 N·m. The torque constant is 0.486 N·m/A rms, allowing current regulators in the amplifier to calculate torque directly from phase-current feedback. A phase resistance of 2.34 Ω influences copper losses, while the 25 mH inductance shapes current-loop bandwidth and minimizes ripple. The four-pole rotor works with sinusoidal commutation. A viscous damping value of 0.007 N·m/kRPM represents speed-related drag that must be overcome during continuous motion.
System modeling uses the back EMF constant of 29.4 Vrms/kRPM to determine the DC-bus voltage required for target speeds. A rotor inertia of 0.000836 kg·m² works with the 5 kg total mass and a static friction level of 0.08 N·m when calculating acceleration limits and settling behavior. Heat leaves the windings through a housing path rated at 0.87 °C/W, while temperature rise follows an 18-minute time constant before reaching equilibrium. These values inform controller gains, heat-sink sizing, and duty-cycle planning so the axis can achieve short cycles without exceeding electrical or thermal limits.
