GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions
3-105
Speed Feedback Calculatio n
The Speed Feedback Calculation function provide s a set of speed feedba ck signals
for control and display purposes.
Function inputs
There are three main sour ces of speed feedback informat ion: tachometer feedback,
estimated speed, and simulated speed. The following table specifies the input
variables of t he Speed Feedback Calculation function.
Variable Description
Tach speed, i nstr. Measured ta chometer speed. Radians/secon d
Simulated s peed Simulated speed from motor simulation or from external
source. Radians/second
Output freq, unfil Estimated electrical frequency. Hertz

Function control outputs

The following table specifies the control output variables of the Speed Feedback
Calculation function.
Variable Description
Speed reg fbk Speed feedback for the speed regulator. Appropriate selection
of input speed signal filtered for control purposes. RPM

Function display outputs

The following table specifies the display output variables of the Speed Feedback
Calculation function.
Variable Description
Motor speed Display versi on of either tachom eter speed or sim ulated
speed. RPM
Speed feedback Display version of speed regulator feedback. RPM
Calculated speed Display ver sion of estimated speed feedback. RPM
Output frequency Display version of the estimated electrical frequency. Hertz