Derating Function
Libraries:
Motor Control Blockset /
Controls /
Controllers
Motor Control Blockset HDL Support /
Controls /
Controllers
Description
The Derating Function block generates the derating factor
(y
) according to the feedback
(ffeedback
) and maximum limit
(fmax
) values of the input reference
signal.
The derating factor:
Remains equal to one when
ffeedback
lies between positive and negative values of the Derating threshold. The derating factor varies linearly outside this range according toffeedback
.Remains equal to zero when the reference signal lies beyond (positive or negative)
fmax
.
Therefore, you can use the generated derating factor to derate a control signal after the reference signal crosses the specified Derating threshold.
This figure shows the block output when you use a sinusoidal wave as
ffeedback
.
Equations
The Derating threshold parameter, indicates the percentage of peak amplitude for the reference signal. The Derating threshold is 0.5 in the block output shown, which results in a threshold value of 2 (for the peak amplitude value of 4 for the sinusoidal reference signal).
This equation describes how the block computes the derating factor
(y
).
Ports
Input
Output
Parameters
Extended Capabilities
Version History
Introduced in R2020a