
Program features 51
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 (vector or scalar) pre-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, it is
possible to synchronize the motor start and, for example, the release of a
mechanical brake.
Settings and diagnostics
Parameters
(page
).
Events: -
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
. When both
the reference and motor speed drop below a certain level, the drive will stop
generating sinusoidal current and start to inject DC into the motor. The current
is set by parameter
. When the reference exceeds parameter
drive operation continues.
Reference
Motor speed
DC hold
t
t
Summary of Contents for ACS280
Page 1: ... ABB MACHINERY DRIVES ACS280 coldplate drives Firmware manual ...
Page 4: ......
Page 10: ...10 ...
Page 16: ...16 Control panel ...
Page 20: ...20 Start up ID run and use ...
Page 24: ...24 Default control connection ...
Page 88: ...88 Program features ...
Page 298: ...298 Parameters ...