Tuning The Speed Regulator; Tuning Procedure For The Vector Speed Loop; Initial Values; Relation Of Motor Voltage And Forced Slip - Reliance electric GV3000/SE Instruction Manual

Motor nom.
Voltage [%]
75%
25%
no-load
current
Figure 6-3: Relation of motor voltage and forced slip
7. For (LOCAL and AUTO) or REMOTE modes: If using a remote speed reference, check - using the
Local DISPLAY MODE - that the speed reference is correct (J4: +/-10VDC, or 0-20mA, or 4-20mA).
Take in account any values set into P.009 (Analog Reference Offset) and P.010 (Analog Reference
Gain) and P.011 (Invert Speed Reference Signal) that have scaled the speed reference. Refer to
Section 4 for description of General Parameters.

Tuning the Speed Regulator

Important: Tuning the speed regulator may not be required for the application.
1. Turn OFF, lock out or tag input power to the controller.
2. Connect the application load to the motor.
3. Turn Power ON.
4. Press the controller START key.
5. Adjust U.012 (Speed Regulator Prop. Gain) or U.013 (Speed Regulator Integral Gain) if necessary.
U.012 is the proportional gain of the speed regulator, which determines how smoothly and quickly
the controller responds to request of speed changes. A typical value is 2.0.
Greater values result in faster response, but may show less stability.
If the motor speed "overshoots" the speed reference when changes to the speed reference are
made, or if the motor speed is unstable, reduce the value of U.012.

Tuning Procedure for the Vector Speed Loop

The recommended pre-set value for the proportional and the integral gain of the speed loop parameters
are based on a total drive's inertia of twice the motor's inertia.

Initial values

Power module sizes
<= 37 kW
75 kW
132 kW
Special tuning
Further speed loop tuning is required, if
• the load inertia is larger than twice the motor's inertia.
• a higher speed loop response is required.
49'1329 e
6 - VECTOR REGULATION MODE
Test range to check U.005
75%
nominal operation point
U.012: Proportional Gain
8
16
25
125%
100%
U.013: Integral Gain
GV3000/SE
decrease U.005
hot
}
+/- 5%
Correct !
cold
increase U.005
motor current
[% nom. motor curr.]
15
15
15
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