B-204-B-23 Kollmorgen
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The Kollmorgen B-204-B-23 is part of the Goldline B and BH Motors series and provides a continuous stall torque of 4.47 N-m with a torque constant of 0.85 N-m per amp RMS. This motor supports a maximum line voltage of 250 volts RMS and weighs 6.2 kilograms. Its rotor inertia is 0.0001729 kg-m², and it features a mounting bolt circle of 100 mm.
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Product Description:
The B-204-B-23 is a brushless servo motor produced by Kollmorgen within the Kollmorgen Goldline B and BH Motors series. This rotary unit is intended for closed-loop motion axes in industrial automation where accurate torque and velocity control are necessary for positioning tables, pick-and-place heads, or process tooling. Its electromagnetic design interfaces directly with matched digital amplifiers to sustain commanded torque while allowing rapid speed changes. Because the motor is brushless, commutation is handled electronically rather than through mechanical brushes, which helps support repeatable motion in applications with frequent starts, stops, and reversals.
The motor delivers a continuous stall torque of 4.47 N-m, produced with phase current that scales by its 0.85 N-m/A RMS torque constant. A back electromotive force of 51.2 VRMS/kRPM is generated at rated speed, informing drive commutation. The winding inductance of 38.0 mH and a DC resistance of 2.48 Ω set the electrical time constant that the amplifier must regulate. Up to 250 Volts RMS line potential can be applied, giving headroom for high-speed operation while respecting insulation limits. These electrical values describe how the motor responds to current and voltage changes during torque production and speed control.
The rotor inertia is 0.0001729 kg-m², enabling the drive to reach the specified maximum theoretical acceleration of 80000 rad/s² when commanded. Static friction is 0.10 N-m and viscous damping is 0.009 N-m/kRPM, parameters the controller compensates for during low-speed tuning and settling. Four electromagnetic poles are housed within a 275.8 mm overall length stator that mounts to machinery through a 100.00 mm bolt circle. Heat produced by copper and iron loss is transferred to the ambient with a thermal resistance of 0.73 °C/Watt, and the motor constant of 0.464 N-m/W expresses the torque available per thermal watt. The assembly weighs 6.2 kg, which matters when the motor is installed on moving axes where total carried mass affects responsiveness.
Frequently Asked Questions about B-204-B-23:
Q: What is the continuous stall torque rating of the B-204-B-23 motor?
A: The B-204-B-23 servo motor has a continuous stall torque of 4.47 N-m, providing sustained torque for steady operation.
Q: What is the maximum line voltage supported by the B-204-B-23 motor?
A: This model can operate at a maximum line voltage of 250 Volts RMS.
Q: What is the back EMF constant for the Kollmorgen B-204-B-23?
A: The B-204-B-23 has a back EMF constant of 51.2 VRMS per kRPM.
Q: What is the inductance value of the B-204-B-23 servo motor?
A: The inductance of the B-204-B-23 motor is specified at 38.0 mH.
Q: How much does the Kollmorgen B-204-B-23 motor weigh?
A: This motor weighs 6.2 kg, making it suitable for applications requiring moderate weight.
