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VFD (Variable frequency drive)
Bosch Rexroth AB, Installation and maintenance manual, Hägglunds DOb, RE 15327-WA/05.2017
9.3.4.2 C1: Motor and system parameters.
Nameplate parameters configuration
Most of the motor data are available on the motor nameplate, based on which the
following parameters of the frequency converter need to be set accordingly.
Code
Name
C1.05
Motor rated power
C1.06
Motor rated voltage
C1.07
Motor rated current
C1.08
Motor rated frequency
C1.09
Motor rated speed
C1.10
Motor rated power factor
Motor thermal protection without temperature sensor
This function is to realize the motor thermal protection based on the thermal model
of motor. Since PTC in use, Motor thermal protection without temperature sensor is
inactive ([C1.69]=0).
Motor derating frequency at low speed
This function is used to reduce the overload and thermal risks as motors have low
cooling performance at low speed, compared to at rated speed.
• Low speed derating frequency
Code
Name
C1.69
Motor thermal protection
setting
When the output frequency is higher than [C1.75] 'Low speed derating frequency',
the allowed continuous current is [C1.07] 'Motor rated current'.
• When the output frequency is lower than [C1.75], the allowed continuous current
is reduced to [C1.76] ('C1.76'=Zero speed load).
Setting range
Default
0.1...1,000.0 kW
DOM
0...480 V
DOM
0.01...655.00 A
DOM
5.00...400.00 Hz
50.00
1...30,000
DOM
0.00...0.99
0.00
Setting range
Default
0: Inactive
1
1: Active
Min.
Attri.
0.1
Stop
1
Stop
0.01
Stop
0.01
Stop
1
Stop
0.00
Stop
Min.
Attri.
-
Stop
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