M-803-A-A9-074 Kollmorgen
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The Kollmorgen M-803-A-A9-074 is a servo motor from the M Goldline Servo Motors series with a rated power of 7.9 kW and a rated speed of 2000 RPM. It provides a continuous stall torque of 44.6 Nm at 25°C and features a frameless resolver feedback type. The motor has a peak torque of 130.0 Nm and operates with a maximum line-to-line voltage of 250 V RMS.
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Product Description:
Kollmorgen's M-803-A-A9-074 is a three-phase permanent-magnet servo motor in the M Goldline Servo Motors series. The unit converts drive current into controlled rotational motion for positioning tables, gantries, and other automation axes that demand high torque density and fast response. It is designed for direct coupling to precision gearheads and belt drives. Its permanent-magnet design supports compact torque production and stable servo response during rapid starts, stops, and reversals. When paired with a Kollmorgen drive, the motor supports closed-loop control that improves cycle time and repeatability in packaging, material-handling, and process equipment.
At its rated operating conditions, the motor can carry a continuous line current of 24.9 A RMS and deliver 7.9 kW of mechanical power. At a winding temperature of 25 °C, it produces 44.6 N·m of continuous stall torque, while short-duration moves can reach 130.0 N·m. Motion is limited by a maximum shaft speed of 2000 rpm, which is also the rated operating speed for steady duty. These peaks require drive hardware that can source 81.0 A RMS momentarily without exceeding thermal limits. A rotor inertia of 0.0352 kg·m² helps balance acceleration and load damping, allowing fast index moves without excessive overshoot.
The electrical constants tie these mechanical values to the drive electronics. A back EMF constant of 102.0 VRMS/kRPM indicates the voltage the inverter must overcome at speed, while a phase inductance of 16.3 mH helps filter current ripple generated by PWM switching. With a torque sensitivity of 1.69 N·m/A RMS, each commanded ampere produces proportional torque output. These values influence current-loop behavior and the voltage demand seen by the drive as speed increases. Six magnetic poles support smooth commutation through the frameless resolver feedback, and the 0.361 Ω direct-current resistance governs copper loss. Continuous stall torque drops to 42.0 N·m at 40 °C, and the drive should remain below the 250 V RMS line-to-line limit.
Frequently Asked Questions about M-803-A-A9-074:
Q: What are the continuous stall torque ratings for the M-803-A-A9-074?
A: The M-803-A-A9-074 servo motor has a continuous stall torque of 44.6 N·m at 25°C and 42.0 N·m at 40°C.
Q: What type of feedback does the M-803-A-A9-074 servo motor use?
A: This motor uses a frameless resolver as its feedback type.
Q: What is the maximum operating speed of the M-803-A-A9-074?
A: The maximum rated speed and the rated speed for this servo motor is 2000 RPM.
Q: What is the peak torque output of the M-803-A-A9-074?
A: The M-803-A-A9-074 delivers a peak torque of 130.0 N·m.
Q: What is the rated power of the M-803-A-A9-074 servo motor?
A: Its rated power output is specified at 7.9 kW.
