MSD Multi-Axis System Operation Manual DC-AC Servo Drive
79
9 Planning
9.7.1
Determining the drive power required per axis
To determine the drive power per rotary axis the following information is required:
Maximum torque
Effective torque
Maximum speed
Gear ratio
− Formula for effective torque
(for torque curves with constant sections):
√
∑M
i
²
.
t
i
T
M
eff
=
− Formula for maximum torque:
1
i
˜n
˜t
1
n
gear
M
max
=
M
load
M
accel
= 2 · °
M
accel
+
1
i
2
J
load
)
(J
Motor
+
To determine the drive power for linear motors, the following information is required per
axis:
•
Maximum thrust
•
Effective thrust
•
Maximum feed velocity
Example with six axes
Individual
AC-AC axes
AC-AC Servo Drive
as supply
Power Supply Unit
Components
6x G392-024/G395-024
6x mains choke
6x braking resistor
5x G393-024/G397-026
1x G392-143/G395-170 with
- Mains choke
- Mains filter
- Braking resistor
6x G393-024/G397-026
1x G396-110
1x LCL set
Investment costs
100 %
115 %
142 %
Energy saving
1)
-
5 %
10 %
Electricity price
0.1264 €/kWh
2)
Operating time
16 hours/day, 20 days/month
Amortisation of
the additional
costs after
-
11 months
16 months
1) Compared to individual AC axes, this value is to be determined individually for each application
2) Bundesverband der Energie-Abnehmer e.V., German electricity price comparison I/2011 for medium-sized industrial custom-
ers, average electricity price in former West German states
Table 9.3 Cost-effectiveness calculation for six axes
9.7 Dimensioning
This section provides you with an overview on how you can design the MSD Multi-Axis
System to suit your application. A large number of parameters need to be taken into
account during the design of a multi-axis system. You can compile all relevant data for
dimensioning your application using the instructions in this chapter.
NOTE
Based on these data, the specialists in Moog planning support will prepare
a detailed dimensioning calculation. You can contact planning support via
[email protected].
moog
Id. no.: CA97554-001 0
5
/2017
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