I$EV
$EV
 

Servo control

3.7 Current setpoint filter

 

 

 

 

 

 

 

˶1

 

 

$EV

 

 

 

 

 

 

 

 

 

 

Denominator natural frequency

 

I

= I  

 

1

 ˭

6S

 

 

 

 

 

I

 

 

 

 

 

 

 

 

'

 

 

%%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

$EV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Denominator damping

 

 

6S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



I

 

 

 

 

 

General low-pass with reduction

Table 3-6

Example of general low-pass with reduction

 

 

 

 

 

 

 

 

 

 

 

STARTER filter parameters

Amplitude log frequency curve

 

Phase frequency curve

Characteristic frequency fAbs = 500 Hz

 

 

 

 

 

 

 

 

 

 

I$EV +]

 

 

 

Damping D = 0.7

 

 

 

 

 

 

 

G%

 

 

 

Reduction Abs = -10 dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$EV  G%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conversion to parameters for general order filters:

● Numerator natural frequency fZ = fAbs (start of reduction)

I=

● Numerator damping

Denominator natural frequency fN

Denominator damping DN

Transfer function general 2nd-order filter

 

 

 

 



 

 

 

 

 

 

V

 

 

'=

V



 

 

 

 

+ V

 

 

˭I=

 

 

 

˭I=

 

 

 

 

 

 

 

 

 



'1

 

 

 

 

 

V

 

 

 

 

 

 

 

 

V



 

 

˭I1

 

 

˭I1

 

 

 

 

 

 

Numerator natural frequency fZ

Numerator damping DZ

Denominator natural frequency fN

Denominator damping DN

82

Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

Page 82
Image 82
Efficient Networks S120 manual General low-pass with reduction, Transfer function general 2nd-order filter