Motors-D81.1-complete-English-06-2020

© Siemens 2020
SIMOTICS XP 1MB1, 1MB5 explosion-protected motors
Orientation
■ Technical specifications
Individual drive check of variable speed drive (VSD) systems
(IC411 self-ventilated motors) with configuration characteristics
for converter operation – 1MB1/1MB5 motors (all types of protection).
Limits for example control ranges are listed in the power tables
on the following pages. For individual drive checks, the following
configuration characteristics apply to frame sizes 71 to 355.
For driven machine power or torque less than or equal to rated
data, operation up to f max in accordance with the power tables is
possible. This applies to configurations with any load torques
and control ranges.
The maximum admissible speed in field weakening can be calculated
by dividing f max 120 by the motor's number of poles.
Checking the feasibility of the required operating point
To do this, (derived from reference point A)
• The desired load/power P 2 must be divided by the VSD power
P VSD
• The desired control speed n must be divided by the VSD asynchronous
speed n asyn VSD
• The desired load/torque T D must be divided by the VSD torque
T VSD.
These calculated values should be checked afterwards against
the following diagrams to determine whether the desired operating
point (from speed 0) is below the VSD load/torque limit
T D /T VSD and the load/power limit P 2 /P VSD.
1.1
1.1
Torque limit T D /T VSD
1
0.9
0.8
BT
Cooling method IC411 - standard
AT/P
1.00
Cooling method IC411 - standard
DP
1
0.9
0.8
Power limit P 2 /P VSD
0.7
CT
0.7
0.6
0.5
0.50
BP
DT
0.6
0.5
0.4
0.3
Constant flow range
Field-weakening range
0.4
0.3
5
0.2
0.2
0.1
0
0
CP
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
0.1
0
2
G_D081_EN_01078
Control speed nn /
asyn VSD
Torque limit at cooling method IC411 - standard
TD
/T
VSD
Power limit at cooling method IC411 - standard P2
/P
VSD
Configuration characteristics for frame sizes 71 to 200
AM/P: Reference point for general selecting/dimensioning
AP: Typical load point for applications with square-law load
torque, e.g. fans and pumps
BM/CM: Typical load point for applications with constant load
torque, e.g. hoisting gear, conveyor belts etc.
DM/DP: Typical load point for applications with increased
speed/frequency
Siemens D 81.1 · 06/2020
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