Danfoss ADAP-KOOL Drive, Руководство по программированию

Страница: 53 / 262

speed exceeds the speed set in this parameter, becomes a “start-zone” where the current limit and
motoric torque limit is set to what is maximum possible for the drive/motor combination. This pa-
rameter is normally set to the same value as par. 4-11
Motor Low Speed Limit
. When set to zero
the function is inactive.
In this “starting-zone” par. 3-82
Starting Ramp
is active instead of par. 3-41
Ramp 1 Up Time
to
ensure extra acceleration during the start and to minimize the time where the motor is operated
under the minimum speed for the application. The time without protection from the Current Limit
and Torque Limit must not exceed the value set in par. 1.79
Compressor Start Max Time to Trip
or
the drive will trip with an alarm [A18] Start Failed.
When this function is activated to get a fast start then also par. 1-86
Compressor Min Speed for
Trip
is activated to protect the application from running below minimum motor speed e.g. when in
current limit.
This function allows high starting torque and use of a fast starting ramp. To ensure the build-up of
a high torque during the start, various tricks can be done through clever use of start delay / start
speed / start current.
1-78 Compressor Start Max Speed [Hz]
Range: Function:
Application
Depend-
ent* [0.0 - par. 4-14 Hz] The parameter enables “High Starting Torque”. This is a function, where the Current Limit and
Torque Limit are ignored during start of the motor. The time, from the start signal is given until the
speed exceeds the speed set in this parameter, becomes a “start-zone” where the current limit and
motoric torque limit is set to what is maximum possible for the drive/motor combination. This pa-
rameter is normally set to the same value as par. 4-11
Motor Low Speed Limit
. When set to zero
the function is inactive.
In this “starting-zone” par. 3-82
Starting Ramp
is active instead of par. 3-41
Ramp 1 Up Time
to
ensure extra acceleration during the start and to minimize the time where the motor is operated
under the minimum speed for the application. The time without protection from the Current Limit
and Torque Limit must not exceed the value set in par. 1.79
Compressor Start Max Time to Trip
or
the drive will trip with an alarm [A18] Start Failed.
When this function is activated to get a fast start then also par. 1-86
Compressor Min Speed for
Trip
is activated to protect the application from running below minimum motor speed e.g. when in
current limit.
This function allows high starting torque and use of a fast starting ramp. To ensure the build-up of
a high torque during the start, various tricks can be done through clever use of start delay / start
speed / start current.
1-79 Compressor Start Max Time to Trip
Range: Function:
5.0 s* [0.0 - 10.0 s] The time, from the start signal is given until the speed exceeds the speed set in par. 1-77 must not
exceed the time set in the parameter or the drive will trip with an alarm [A18] Start Failed.
Any time set in par. 1-71
Start Delay
for use of a start function must be executed within the time
limit.
3.3.7 1-8* Stop Adjustments
Parameters for setting special stop features for the motor.
1-80 Function at Stop
Option: Function:
Select the frequency converter function after a stop command or after the speed is ramped down
to the settings in par.1-81
Min Speed for Function at Stop [RPM]
.
[0] * Coast Leaves motor in free mode.
[1] DC Hold/Motor Preheat Energizes motor with a DC holding current (see par.2-00 DC Hold/Preheat Current ).
ADAP-KOOL ® Drive Programming Guide 3 Parameter Description
MG.11.N1.02 - VLT ® is a registered Danfoss trademark
53
3