Motor-Side Converter; Reduced Run Capability - ABB ACS800-37-0060-3 Hardware Manual

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Motor-side converter

The motor control is based on the Direct Torque Control (DTC) method. Two phase
currents and DC link voltage are measured and used for the control. The third phase
control is measured for earth fault (ground fault) protection.
The motor-side converter is controlled by an RDCU drive control unit located in the
swing-out frame of the cabinet. The RDCU is connected to the inverter module(s) by
a fibre optic link, distributed through an optical branching unit. In the inverter
modules, the optic link connects to the AINT board, the terminals of which are
accessible through a hole on the front panel of the module.

Reduced run capability

This functionality is available for units with parallel-connected supply or inverter
modules only, i.e. frame sizes 2×R8i and up.
If one of the parallel-connected supply or inverter modules fails, the unit can
continue to be run at reduced power using the remaining modules. See page
information on utilising this feature.
The ACS800-37
110 for