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Technical specifications for
1FK7103-2AF71-1QH0
The Siemens 1FK7103-2AF71-1QH0 synchronous motor
The Siemens SIMOTICS S 1FK7-CT synchronous motor (Article Number: 1FK7103-2AF71-1QH0) is a high-performance, compact permanent-magnet motor engineered for precise and demanding industrial applications. This model is rated for a power output of 4.4 kW and operates at a rated speed of 3,000 rpm under a DC link voltage of 600V. It delivers a static torque of up to 36.0 Nm at 100 K, with a rated torque of 14.0 Nm and a stall torque of 30.0 Nm at 60 K. The motor draws a rated current of 11.5 A, and the stall current reaches 26.0 A at 100 K.The motor features natural cooling, a shaft height of 100, and a flange-mounted IMB5 design (also compatible with IM V1 and IM V3), making it suitable for various mounting configurations. The unit integrates an absolute single-turn 20-bit encoder (AS20DQI) with Drive-CLiQ interface, ensuring precise feedback and seamless integration with Siemens drive systems. It includes a rotatable power connector and comes with a smooth shaft and holding brake, enhancing safety and operational control.
In terms of mechanical construction, the motor exhibits excellent build quality with radial runout tolerance of 0.050 mm, concentricity and axial runout tolerances of 0.10 mm, and conforms to vibration severity grade A. The torque constant is 1.39 Nm/A, and the voltage constant is 89.5 V per 1000 rpm at 20ºC. Additional physical characteristics include a winding resistance of 0.09 Ω, rotating field inductance of 2.4 mH, and electrical and mechanical time constants of 27.00 ms and 1.46 ms, respectively. The thermal time constant is 65 minutes, and the shaft torsional stiffness is 108,000 Nm/rad, supporting robust and stable operation.
The motor provides 93.0% efficiency, demonstrating its capability for energy-efficient operation. It also boasts a protection rating of IP64, ensuring solid resistance against dust and water ingress. The net weight of the motor is 33.0 kg, making it relatively lightweight for its power class while maintaining mechanical durability.
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