Control Structure In Advanced Vector Control - GE AF-650 GP Design And Installation Manual

Application Set-Up Examples

6.3.1 Control Structure in Advanced Vector Control

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Illustration 6.5 Control Structure in Advanced Vector Control Open Loop and Closed Loop Configurations
See Active/Inactive Parameters in Different Drive Control Modes in the Programming Guide for an overview of which control
configuration is available, depending on selection of AC motor or PM non-salient motor. In the configuration shown in
Illustration 6.5, parameter H-41 Motor Control Principle is set to [1] Advanced Vector Control and parameter H-40 Configuration
Mode is set to [0] Speed open loop. The resulting reference from the reference handling system is received and fed through
the ramp limitation and speed limitation before being sent to the motor control. The output of the motor control is then
limited by the maximum frequency limit.
If parameter H-40 Configuration Mode is set to [1] Speed closed loop, the resulting reference is passed from the ramp
limitation and speed limitation into a speed PID control. The Speed PID control parameters are located in parameter group
PI-0#. The resulting reference from the Speed PID control is sent to the motor control limited by the frequency limit.
Select [3] Process in parameter H-40 Configuration Mode to use the process PID control for closed loop control of for example,
speed or pressure in the controlled application. The Process PID parameters are located in parameter group PI-2# and PI-3#.
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