28 Operation principle and hardware descriptionOperation principleThe ACS580-01 is a drive for controlling asynchronous AC induction motors andpermanent magnet synchronous motors.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 R0…R3. Conducts the surplus energy fromthe intermediate DC circuit of the drive to the brake resistor when necessary. Thechopper operates when the DC link voltage exceeds a certain maximum limit. Thevoltage rise is typically caused by deceleration (braking) of a high inertia motor. Theuser obtains and installs the brake resistor when needed.5 DC connection (UDC+, UDC-), for an external brake chopper in frames R4…R9.L1L2L3T1/UT2/VT3/WR- UDC+R+1 2 34UDC-5ACS580-01
