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Magtrol Model DSP7000 Dynamometer ControllerChapter 4 – PID Settings
SETUP
4.3 SETTING THE CORRECT PID’S FOR YOUR MOTOR
Note: Each type of motor will have it’s own optimum PID setting at
different load points.
4.3.1 SeTTing THe piD wiTH an unknown MoTor or SySTeM
If the user is unfamiliar with the characteristics of the motor under test, it is recommended to
begin in Open Loop Control mode. In doing so, the user can safely get an idea of the motor’s
performance.
1. To enter Open Loop Control mode, begin with the motor and brake OFF. Press the OPEN
LOOP button. The display will appear as follows:
BRAKE STATUS SET POINT SET POINT PID
TORQUE SPEED USER DISPLAY
0.000 X
0.000 XX.XX 0
OFF 0.00 %
OPEN LOOP
PRELOAD
Figure 4–1 Open Loop Control Menu
2. Set the percent excitation to zero using the decrease/increase dial.
3. Start the motor.
4. Turn on the brake power.
5. Slowly increase the excitation current to the brake.
6. Make a note of the torque and speed values of which the motor is capable.
7. To exit the Open Loop Control mode and return to the main menu, turn the motor and brake
OFF and press the OPEN LOOP button.
4.3.2
SeTTing THe piD for Torque ConTrol
1. With the motor and brake OFF, set the desired Torque Set Point by pressing the TORQUE
SET button and using the and buttons and Decrease/Increase dial.
2. Set the P, I and D values to zero.
3. Turn the motor ON.
4. Turn the brake ON.
5. Slowly increase the P term until the torque read is about 25% of the desired load point.
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