Stober PK - Page 78

Drive selection for motors
Determine the motor size
Motor selection finished
Determine the actual torques
Yes
2eff * 2th
M M£
Select a larger motor or,
where appropriate, a
different gear ratio
No
No
Yes
Motor with convection
cooling?
£
1eff * limK
M M
Yes
Select a larger motor
or, where appropriate,
a different gear ratio
No
Determine the actual
maximum motor speed
n1max*
£
1max* 1limK
n n
Determine the actual
maximum motor speed
n1max*
£
1max* 1limF
n n
Yes Yes
No
£
1acc* lim
M M
No
Select a smaller gear ratio
and, where appropriate, a
larger motor
Select a smaller gear
ratio and, where
appropriate,
a larger motor
2eff * 2th
M M£
£
1acc* lim
M M
£
1eff * limF
M M
The value for M
lim
, M
limK
, M
limF
, n
1limK
and n
1limF
can be found in the motor characteristic curve in the chapter
[}11.3]. Note the size, nominal speed n
N
and cooling type of the motor.
4.6 Project configuration 4 PHQplanetary geared motors
78