User`s manual

63
Magtrol Model DSP6001 Dynamometer Controller
Chapter 7 – Manually Controlled Operation
OPERATION
Note: If the response is too slow or oscillatory, adjust the values for P,
I and D. (For more detailed instruction, refer to Chapter 5– PID
Settings.)
Caution: do not exCeed the Capabilities of the dynamometer or the power
sourCe in use. motors draw very large Currents when held at
loCked rotor and overheating may result. when using torque
Control, induCtion motors Cannot be tested beyond breakdown,
exCept at loCked rotor. refer to Section 7.5 – How to Set Speed
control.
7.5 HOW TO SET SPEED CONTROL
Note: When using speed control, motors between 0 and 100 rpm cannot
be tested unless the dynamometer is equipped with an optional,
high resolution speed encoder.
1. Beginning with the brake in the OFF position, press SHIFT.
2. Press MAX SPEED button. The display should appear as follows:
POWER
BRAKE STATUS SET POINT SET POINT P I D
TORQUE SPEED STATUS
Figure 7–5 Max Speed Menu
3. Use UP  and DOWN  buttons and the Decrease/Increase dial to set a value equal to or
slightly greater than the free-run speed of the motor under test.
Note: PID values should be set at this time. See Section 5.5 – Setting the
Correct PID’s for Your Motor.
3. Use the BRAKE ON/OFF button to turn the brake ON.
4. Start the motor under test.
5. Press the TORQUE SET button and adjust the set point to the desired load.
6. Check the torque display to make sure that the dynamometer loads the motor under test to
that torque load.
Desired Results
The dynamometer should load the motor under test to the load point quickly
with little or no overshoot when the BRAKE function cycles ON or OFF.