1-6
Engineering Guide CDA3000
1 Analysis of task
Functional analysis
In a functional analysis each component which performs a function must
merely be replaced by another one. In this case this means:
• the DC motor is replaced by an AC motor
• the tacho is replaced by a digital encoder and
• the DC controller is replaced by an inverter with field-oriented regula-
tion.
Figure 1.6 Solution from functional analysis
The functional analysis produces a solution with speed feedback - See
Table 1.1.
(1) Inverter with field-oriented regulation
(2) AC motor
(3) Encoder
(4) Gearing
(5) Screw return thrust bearing
DC drive Three-phase AC drive
1 DC controller 1 Inverter with field-oriented regulation
2 DC motor 2 AC motor
3 Tacho 3 Encoder
4 Gearing 4 Gearing
5 Screw return thrust bearing 5 Screw return thrust bearing
Old solution Functional analysis (NEW 1)
Table 1.1 Comparison between old solution and solution from functional
analysis
~
M
3~
M
1
~
(1)
(2)
(4)
(5)
(3)
~
To Next Page
Loading...
