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MBT High Synchronous Torque Motors
10.2.3
Mean speed
10.2.4
Trapezoidal speed
General
The mean speed is required to determine the mechanic continuous power of
the drive. The following calculation can be used for a user-friendly determina‐
tion of trapezoidal or triangular speed profiles:
Fig. 10-5:
Triangular or trapezoidal velocity profile
n
Mean speed for speed segment with duration t
avgi
n
Initial speed of the speed segment in min
a
n
Final speed of speed segment in min
e
n
Mean speed via total duration in min
avg
t
Duration of speed segment in s
i
t
Total duty cycle time, including breaks and/or standstill time, in
all
s
Fig. 10-6:
Determining the mean speed of triangular or trapezoidal speed pro‐
files
This mode of operation is characteristic for the most applications. After the
acceleration phase, constant speed is used for operation until the decelera‐
tion phase.
Motor dimensioning
in min
i
-1
-1
-1
R911298798_Edition 08 Bosch Rexroth AG
291/409
-1
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