78 Program features
Pre-heating (Motor heating)
The pre-heating function keeps the motor warm and prevents condensation inside the
motor by feeding it with DC current when the drive has been stopped. The heating
can only be on when the drive is in the stopped state, and starting the drive stops the
heating.
When pre-heating is activated and the stop command is given, pre-heating starts
immediately if the drive is running below the zero speed limit (see bit 0 in parameter
). If the drive is running above the zero speed limit,
pre-heating is delayed by 60 seconds to prevent excessive current.
The function can be defined to be always active when the drive is stopped or it can be
activated by a digital input, fieldbus, timed function or supervision function. For
example, with the help of signal supervision function, the heating can be activated by
a thermal measurement signal from the motor.
The pre-heating current fed to the motor can be defined as 0…30% of the nominal
motor current.
Notes:
• In applications where the motor keeps rotating for a long time after the modulation
is stopped, it is recommended to use ramp stop with pre-heating to prevent a
sudden pull at the rotor when the pre-heating is activated.
• The heating function requires that the STO circuit is closed or not triggered open.
• The heating function requires that the drive is not faulted.
• Pre-heating uses DC hold to produce current.
Settings
•
Menu - Primary settings - Motor - Pre-heating
• Parameters
(page
).
Energy optimization
The function optimizes the motor flux so that total energy consumption and motor
noise level are reduced when the drive operates below the nominal load. The total
efficiency (motor and drive) can be improved by 1…20% depending on load torque
and speed. Energy optimization is enabled by default.
Note:
With permanent magnet and synchronous reluctance motors, energy
optimization is always enabled.
Settings
•
Menu - Energy efficiency
(page
).
Summary of Contents for ACQ580
Page 1: ...ABB drives for water Firmware manual ACQ580 pump control program ...
Page 4: ... 2017 ABB Oy All Rights Reserved 3AXD50000035867 Rev C EN EFFECTIVE 2017 06 21 ...
Page 30: ...26 Start up control with I O and ID run ...
Page 40: ...36 Default configuration ...
Page 304: ...300 Parameters ...
Page 340: ...336 Additional parameter data ...