Siemens simovert masterdrives Configuration Manual

Configuration
3.3 Dimensioning
Load duty cycle
A load duty cycle defines the characteristics of the motor speed and the torque with respect
to time.
Figure 3-6 Example of a load duty cycle
A load torque is specified for each time period. In addition to the load torque, the average
acceleration. It may be necessary to take into account a frictional torque that opposes the
direction of motion.
load moment of inertia and motor moment of inertia must be taken into account for
The gear ratio and gear efficiency must be taken into account when calculating the load
and/or accelerating torque to be provided by the motor. A higher gear ratio increases
positioning accuracy in terms of encoder resolution. For any given motor encoder resolution,
as the gear ratio increases, so does the resolution of the machine position to be detected.
For more information about gear units, see the motor descriptions.
For the motor torque in a time slice Δ
t
k
the following applies:
()
•
1
•
) ++•
60
2
• ( +••
60
2
•+=
i
MM
t
n
Ji
t
n
JJM
*
5
ORDGL
L
ORDGL
ORDG
L
ORDGL
*
0
LPRW
The motor speed is:
ORDGLLPRW
i
nn •=

The rms torque is obtained as follows:
t
M
M
∑
Δ•
=
2
PRWUPV
L
PRWL
T
General Section for Synchronous Motors
3-10 Configuration Manual, (PJAL), 11.2005 Edition, 6SN1 197-0AD07-0BP4

Siemens simovert masterdrives Specifications

General

Brand	Siemens
Model	simovert masterdrives
Category	DC Drives
Language	English