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GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions
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3-105
Speed Feedback Calculation
The Speed Feedback Calculation function provides a set of speed feedback signals
for control and display purposes.
Function inputs
There are three main sources of speed feedback information: tachometer feedback,
estimated speed, and simulated speed. The following table specifies the input
variables of the Speed Feedback Calculation function.
Variable Description
Tach speed, instr. Measured tachometer speed. Radians/second
Simulated speed
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 version of either tachometer speed or simulated
speed. RPM
Speed feedback Display version of speed regulator feedback. RPM
Calculated speed Display version of estimated speed feedback. RPM
Output frequency Display version of the estimated electrical frequency. Hertz