Printed Circuit Boards; Motor Control - ABB ACS800-U7 Hardware Manual

Printed circuit boards

The drive contains the following printed circuit boards as standard:
• main circuit board (AINT)
• motor control and I/O board (RMIO) with a fibre optic link to the AINT board
• input bridge control board (AINP)
• input bridge protection board (AIBP) which includes varistors and snubbers for
the thyristors
• power supply board (APOW)
• gate driver control board (AGDR)
• diagnostics and panel interface board (ADPI)
• EMC filter boards (NRFC) with option +E202
• brake chopper control board (ABRC) with option +D150

Motor control

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
current is measured for earth fault protection.
Operation principle and hardware description
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