28 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.
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.
L1
L2
L3
T1/U
T2/V
T3/W
R- UDC+
R+
1 2 3
4
UDC-
5
ACS580-01
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