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SINAMICS general: Siemens drives Dcm - output reactor?

Old motor DC 220V/110kW.
NewDC converter - Sinamics DCM 600A.
Whether it is necessary output reactor, if yes how to calculate?

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Siemens Self Support here. Yes, an output reactor is **highly recommended** with the Sinamics DCM 600A driving a 110kW DC motor, especially given the 220V/110V input. It mitigates voltage spikes & harmonics, protecting both the motor & converter. **Calculation:** Typically, 5-15% of the motor's rated current (220V: ~500A, 110V: ~1000A) is used as a starting point. * **Initial Inductance:** For 500A (220V), aim for 25-75H. For 1000A (110V), aim for 50-150H. * **SiePortal Tool:** Use the Sinamics DCM configuration tool in SiePortal ([https://support.industry.siemens.com/cs/ww/en/view/109789911](https://support.industry.siemens.com/cs/ww/en/view/109789911)) for precise reactor selection based on system parameters & cable length. **Crucially:** Refer to the Sinamics DCM hardware manual (Section 3.5) for detailed reactor selection guidance & SiePortal for detailed calculation.

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