Dc Magnetization - ABB ACS580 Firmware Manual

Settings
• Menu - Primary settings - Motor - Flux braking
• Parameter 97.05 Flux braking


DC magnetization

The drive has different magnetization functions for different phases of motor
start/rotation/stop: pre-magnetization, DC hold, post-magnetization and pre-heating
(motor heating).
Pre-magnetization
Pre-magnetization refers to DC magnetization of the motor before start. Depending
on the selected start mode
magnetization can be applied to guarantee the highest possible breakaway torque,
up to 200% of the nominal torque of the motor. By adjusting the pre-magnetization
time (21.02 Magnetization
example, the release of a mechanical brake.
Settings
Parameters 21.01 Vector start
time
DC hold
The function makes it possible to lock the rotor at (near) zero speed in the middle of
normal operation. DC hold is activated by parameter
both the reference and motor speed drop below a certain level (parameter
hold speed), the drive will stop generating sinusoidal current and start to inject DC
into the motor. The current is set by parameter
reference exceeds parameter
(page 333).
(21.01 Vector start mode
time), it is possible to synchronize the motor start and, for
mode, 21.19 Scalar start
21.09 DC hold
Program features 115
or 21.19 Scalar start
mode, 21.02 Magnetization
21.08 DC current
21.10 DC current
speed, normal drive operation
mode), pre-
control. When
21.09 DC
reference. When the