KEB COMBIVERT F5 Servo User Manual

6
4
KEB COMBIVERT F5-M / S18
Name: Basis
12.05.04
Chapter Section Page Date
© KEB Antriebstechnik, 2002
All Rights reserved
Functional Desription Setpoint- and Ramp Adjustment
Fig. 6.4.9.c Graph with ramp modes
Calculations
The speed change per raster scan delta_t (step size delta_n) for the mode constant
ascent is calculated from the ramp time t_ramp and the reference speed (1000
rpm) as follows:
1000 rpm
delta_n= óóóóóóóóó
t_rampe / delta_t
For different set values the real ramp time is calculated according to following
formula:
n_soll
t = t_rampe * ó ó ó
1000 rpm
The actual step size for the mode constant time is calculated from the step size
delta_n and the actual set value n_set as follows:
n_soll
delta_n(variable) = delta_n * óóóó
1000 rpm
For a simplification of the internal calculations 1024 min-1 (resp. 2048 min-1 or
4096 min-1 dependent on ud.2) are used as reference speed.
n_set
delta_n(variable) = delta_n *óóóóó
1024 rpm
-1
This results in an error of -2.4 % for the real ramp time. If a specific real ramp time
shall be adjusted, the desired value is to be divided by 1.024. Example:
desired ramp time = 10 s
adjsuted ramp time = 10 s / 1.024 = 9.77 s
delta_f
konstant
delta_t
delta_f
konstant
delta_t
delta_f
konstant
delta_t
delta_f_2
variabel
delta_t
delta_f_1
variabel
delta_t
t_ram
p
et_1
f_1
t
t_2
f_2
f_soll
100 Hz
n_soll
n_2
1000 rpm
n_1
delta_n
konstant
delta_n
konstant
delta_n_2
variabel
delta_n_1
variabel
delta_n
konstant

KEB COMBIVERT F5 Servo Specifications

General

Brand	KEB
Model	COMBIVERT F5 Servo
Category	DC Drives
Language	English