The ACS800-04/U4 and ACS800-04M30Printed circuit boardsThe drive contains the following printed circuit boards as standard:ï main circuit board (AINT)ï motor control and I/O board (RMIO) with a fibre optic link to the AINT boardï input bridge control board (AINP)ï input bridge protection board (AIBP) which includes snubbers for the thyristorsand varistorsï power supply board (APOW)ï gate driver control board (AGDR)ï diagnostics and panel interface board (ADPI)ï brake chopper control board (ABRC) with option +D150Motor controlThe motor control is based on the Direct Torque Control (DTC) method. Two phasecurrents and DC link voltage are measured and used for the control. The third phasecurrent is measured for earth fault protection.
