Vector V/f control (r0108.2 = 0)

 

 

 

 

 

 

 

5.1 Introduction

 

 

 

 

 

 

 

Table 5-1

V/f characteristic (p1300)

 

 

 

 

 

 

 

Parameter

Meaning

Application / property

 

 

 

 

 

values

 

 

 

 

 

 

 

 

0

Linear characteristic

Standard (w/o voltage boost)

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9Q

 

 

 

 

 

 

 

 

 

S



 

 

 

 

 

 



 

 

 

IQ

I

 

 

 

 

 

 

 

1

Linear characteristic

Characteristic that compensates for

9

 

 

 

 

 

 

with flux current control

voltage losses in the stator resistance

9PD[

 

 

 

 

 

 

(FCC)

for static / dynamic loads (flux current

U

 

 

 

 

 

 

 

control FCC).

S

 

 

 

 

 

 

 

This is particularly useful for small

 

 

 

 

 

 

 

 

motors, since they have a relatively

 

 

 

 

/RDG

 

 

high stator resistance.

 

 

 

 

FXUUHQW

 

 

 

 

 

 

 

GHSHQGHQW

 

 

 



 

 

 

 

I

 

 

 

 

 

 

S

 

2

Parabolic characteristic

Characteristic that takes into account

9

 

 

 

 

 

 

 

 

 

 

 

 

 

the motor torque curve (e.g. fan/pump).

 

 

 

 

 

 

 

 

a) Quadratic characteristic (f2

9Q

 

 

 

 

 

 

 

characteristic)

 

 

 

 

 

 

 

 

b) Energy saving because the low

 

 

 

 

 

 

 

 

voltage also results in small currents

 

 

 

 

 

 

 

 

and drops.

 

 

 

 

 

 

 

 

 

 

 

S



 

 

 

 



 

 

 

IQ

I

 

 

 

 

 

 

 

3

Programmable

Characteristic that takes into account

9

 

 

 

 

 

 

 

 

 

 

 

 

characteristic

motor/machine torque curve (e.g.

9PD[

 

 

 

 

 

 

 

synchronous motor).

U

 

 

 

 

 

 

 

 

S

 

 

 

 

 

 

 

 

S

 

 

 

 

 

 

 

 

S

 

 

 

 

 

 

 

 

S

 

 

 

 

 

 

 

 

U

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 



I

I

I

I

IPD[

 

 

 

 

 

 

 

 

S SS S

S

170

Drive Functions

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

Page 170
Image 170
Efficient Networks S120 manual Vector V/f control r0108.2 = Introduction, Meaning, Fcc, Rdg