Lust CDA3000 - Page 21

Engineering Guide CDA3000
1-11
1 Analysis of task
DE
EN
1
2
3
4
5
6
7
A
Figure 1.10 Movement solution split into traction and mechanical function
v/t diagram
The processing cycle of a machine or plant is typically described by the
velocity/time profile, also termed the v/t diagram. From that diagram the
acceleration/deceleration time and the startup and shutdown frequency
can be determined. This repetition rate of the startup and shutdown
process determines the
For more information on the subject of the v/t diagram refer to the formula
bank in See Appendix A.2.9.
➢ motor rating
➢ current load of the
inverter module
➢ and the braking
chopper design
y
x
x y(x(t))
t
Movement solution
Drive function x(t) Mechanical function y(x)
S
S
0
ϕ
x
t
start
enter
stop
return
Example of a movement solution
M
eff
M
1
2
t
1
M
2
2
t
2
M
n
2
t
n
⋅+⋅+⋅
T
-----------------------------------------------------------------=
I
eff
I
1
2
t
1
I
2
2
t
2
I
n
2
t
n
⋅+⋅+⋅
T
--------------------------------------------------------=
P
eff
P
1
2
t
1
P
2
2
t
2
P
n
2
t
n
⋅+⋅+⋅
T
-------------------------------------------------------------=