SINAMICS DC MASTER to feed high inductances

To supply high inductances - such as the fields of large DC or synchronous motors or lifting solenoids - the gating unit is changed over to long pulses using the appropriate parameter settings. At high levels of inductance, the long pulses ensure that the thyristors are reliably triggered. In this case, the armature circuit of the units is not used to supply the armature of DC motors, but to supply large field windings.

Note:

An external overvoltage protective circuit must be provided at the DC voltage output of the SINAMICS DC MASTER (see Catalog D 23.1, section, Accessories).