Operation Principle; Layout - ABB ACS580 Series Hardware Manual

36 Operation principle and hardware description

Operation principle

The ACS580-01 is a drive for controlling asynchronous AC induction motors,
permanent magnet motors and synchronous reluctance motors (SynRM).
The figure below shows the simplified main circuit diagram of the drive.
A
L1
L2
L3
A Drive
1 Rectifier. Converts alternating current and voltage to direct current and voltage.
2 DC link. DC circuit between rectifier and inverter.
3 Inverter. Converts direct current and voltage to alternating current and voltage.
4 Built-in brake chopper (R-, R+) in frames R1...R3. Conducts the surplus energy
from the intermediate DC circuit of the drive to the brake resistor when necessary.
The chopper operates when the DC link voltage exceeds a certain maximum limit.
The voltage rise is typically caused by deceleration (braking) of a high inertia
motor. The user obtains and installs the brake resistor when needed.
5 DC connection (UDC+, UDC-), for an external brake chopper in frames R4...R9.

Layout

Frames R1...R2
The layout of a frame R1 drive is presented below. The main structure of frame R2
is similar to R1. IP55 / UL Type 12 frames are also slightly different from IP21 /
UL Type 1 frames, for example, IP21 / UL Type 1 front cover has two parts while
IP55 / UL Type 12 front cover only has one part.
1 2
4
R- UDC+
3
5
UDC-
R+
T1/U
T2/V
T3/W