Applying Power for the First Time 3-7
Instruction Manual
Torque Mode Operation
Operation
The MAX-430 drive can also operate in torque mode (or current mode), such that a controller
would provide an analog voltage signal proportional to the desired motor torque. For use as a
torque drive, a jumper must be installed from P2 pin 1 to P2 pin 2. With the VCS gain fully
clockwise, a 10 volt VCS signal applied to the drive will yield a 30 amp output to the motor. The
VCS adjustment “scales” the output to the level set by the potentiometer as shown in the figure
below. Scaling changes the Volts to Amps resolution of the drive.
It is not necessary to have tachometer feedback when used in the torque mode (current mode).
Jumper
P2 pin 1 to P2 pin 2
Intro
F
IGURE
3.2
VCS Torque Mode Scaling Examples
30
15
16 VCS # turns
820
30
15
16 VCS # turns
820
ILIM 50%
(4 turns CW)
10 Volts applied
ILIM 100%
(fully CW)
10 Volts applied
ILIM 100%
(fully CW)
10 Volts applied
External Current Limit
1.2 K
Ω
Resistor
(Reduces peak current
by approximately 50%.)
Ipeak (Amps)
Ipeak (Amps)
at VCS input
at VCS input
at VCS input
To Next Page
Loading...