Table of Contents
9.3.4.3 C2: V/F control parameters
V/f control is a control strategy where the ratio between Voltage (V) and frequency
(f) is maintained constant to keep the maximum torque output of the motor constant
while controlling the speed as per our requirement.
V/f curve selection
Code
Name
C2.00
V/f curve mode
• 0: Linear
• This mode refers to linear voltage / frequency control, which is used for normal
Constant torque loads. The default mode is Linear. The frequency converter for
controlling the main pump electric motor used this control mode.
• 1: Square
• This mode refers to square voltage / frequency control, which is used for variable
torque loads of fans, pumps, etc. The frequency converter for controlling the cooler
fan of electric motor used this control mode.
Slip compensation factor configuration
Slip is defined as the relative difference between synchronous speed (speed of the
rotating magnetic field) and rated speed (rotor speed).
Slip compensation factor is used to compensate Motor rated slip frequency (C1.12,
default set automatically according to basic motor parameters) to the actual
applications in V/f control.
Code
Name
Slip
C2.07
compensation
factor
• 0 %: No slip compensation
• The slip compensation function is deactivated.
• 1...100 %: Full slip compensation
• Example: [C1.12] = 2.50 Hz, [C2.07] = 100 %
• The actual slip compensation is 2.50 Hz x 100 % = 2.50 Hz.
• 101...200 %: Over slip compensation
• Example: [C1.12] = 2.50 Hz, [C2.07] = 200 %
• The actual slip compensation is 2.50 Hz x 200 % = 5.00 Hz.
Hägglunds DOb, RE 15327-WA/05.2017, Installation and maintenance manual, Bosch Rexroth AB
VFD (Variable frequency drive)
Setting range
0: Linear
1: Square
2: User-defined
Setting range
Default
0...200 %
0
Default
Min
Attri.
0
-
Stop
Min
Attri.
1
Run
53/80
Table of Contents
