Operation; Printed Circuit Boards; Motor Control - ABB ACS800-U4 Hardware Manual

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Operation

This table describes the operation of the main circuit in short.
Component
Six-pulse rectifier
Capacitor bank
IGBT inverter

Printed circuit boards

The drive contains the following printed circuit boards as standard:
• main circuit board (RINT)
• motor control and I/O board (RMIO)
• EMC filter board (RRFC) when EMC equipment is selected or varistor board
(RVAR) otherwise.

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.
ACS800-04/U4
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Description
Converts the three-phase AC voltage to DC voltage.
Energy storage which stabilizes the intermediate circuit DC voltage.
Converts the DC voltage to AC voltage and vice versa. The motor
operation is controlled by switching the IGBTs.