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10.3 Additional Functions

10-11

Upgraded Versions

10.3.4 Second Stage Notch Filter and Changeable Q Value

The second stage notch filter is added. The Q value that determines the sharpness of notch was fixed to 0.7, but

the Q value can be changed so that more flexible setting is possible. The performances of first stage notch filter

and newly added second stage notch filter are identical.

The filtering is executed in the following order.

(1) Notch Filter Function

The notch filter function decreases the response to the set frequency, and effective when there are machine vibra-

tions. Adjusting the parameter setting according to the machine vibration frequency reduces the machine vibra-

tion.

First Stage Notch Filter

Second Stage Notch Filter

Torque Reference Filter

(Low-pass filter)

Torque Limit

Use First Stage Notch Filter.

Use Second Stage Notch Filter

Added

function

YES

End

Notch filtering

(fc = 1/Δt)

Torque

reference

waveform

Torque

reference

waveform

YASKAWA Sigma II Series User Manual

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