Danfoss VLT FCD 330 Design Guide

VLT
®
FCD Series
(boost) at start to disengage the mechanical brake.
To achieve this parameters 130 Start frequency and
131 Initial voltage are used.
Description of choice:
Set the required start frequency. It is a precondition
that parameter 121 Start function, is set to Start fre-
quency/voltage clockwise [3] or Start frequency
voltage in reference direction [4] and that in parame-
ter 120 Start delay a time is set and a reference
signal is present.
131
131 Initial voltage
(INITIAL VOLTAGE)
Value:
0.0 - 200.0 V
✭ 0.0 V
Function:
Initial voltage is active for the time set in parameter
120 Start delay, after a start command. This param-
eter can be used for example for lifting/dropping
applications (conical anchor motors).
Description of choice:
Set the required voltage necessary to cut out the
mechanical brake. It is assumed that parameter 121
Start function, is set to Start frequency/voltage clock-
wise [3] or Start frequency/voltage in reference
direction [4] and that in parameter 120 Start delay a
time is set, and that a reference signal is present.
132
132 DC brake voltage
(DC BRAKE VOLTAGE)
Value:
0 - 100% of max. DC brake voltage
✭ 0%
Function:
In this parameter, the DC brake voltage is set which
is to be activated at stop when the DC brake
frequency set in parameter 127 DC brake cut-in fre-
quency is reached, or if DC braking inverse is active
via a digital input or via serial communication. Sub-
sequently, the DC brake voltage will be active for the
time set in parameter 126 DC brake time.
Description of choice:
To be set as a percentage value of the max. DC
brake voltage, which depends on the motor.
133
133 Start voltage
(START VOLTAGE)
Value:
0.00 - 100.00 V
✭ Depends on unit
Function:
A higher start torque can be obtained by increasing
the start voltage. Small motors (< 1.0 kW) normally
require a high start voltage.
Description of choice:
The factory setting will be suitable for must applica-
tions, the value may need to be increase gradually
for high torque application.
W
arning: If the use of start voltage
i
s exaggerated, this may lead to over-
e
nergizing and overheating of the motor
and the frequency converter may cut out.
134
134 Load compensation
(LOAD COMPENSATIO)
Value:
0.0 - 300.0%
✭ 100.0%
Function:
In this parameter, the load characteristic is set. By
increasing the load compensation, the motor is given
an extra voltage and frequency supplement at
increasing loads. This is used e.g. in motors/applica-
tions in which there is a big difference between the
full-load current and idle-load current of the motor.
NB!:
If this value is set too high, the frequency
converter may cut out because of overcurrent.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.A1.02 - VLT is a registered Danfoss trade mark
62

Danfoss VLT FCD 330 Specifications

General

Brand	Danfoss
Model	VLT FCD 330
Category	DC Drives
Language	English