11 drive dimensioning – Lenze DSD User Manual
Page 320
11
Drive Dimensioning
11.2
Motor selection
320
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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Description of the parameters
Parameter
Unit
Description
Metric
Imperial
k
f
Field weakening factor
• With the slider you can adapt the max. speed in ad-
vance.
A
rated
~(n
max
)
Previously calculated utilisation of the motor
• The utilisation is calculated from the ratio of the max.
motor speed to its rated speed.
Possible messages:
Utilisation >100 %, regarding the max. torque ( 445)
A~(M
max
)
Utilisation of the motor calculated in advance with refer-
ence to the max. torque in the M-n characteristic.
A
th
,
M
~
(M
rms
)
%
%
Thermal utilisation of the motor with regard to the effec-
tive torque
Relevant topics:
Continuous rated curves (S1 characteristics) ( 317)
Possible messages:
Utilisation >100 %, regarding the effective torque
Type
Type code (excerpt)
• Specification of the motor type.
P
rated
kW
kW
Rated power of the motor
M
rated
Nm
lbfft
Rated torque of the motor
f
rated
Hz
Hz
Rated frequency
I
rated
A
A
Rated current
n
rated
rpm
rpm
Rated speed
P
th,av,M
kW
kW
Medium power loss of the motor
I
max
~
A
A
Previously determined max. required application current
k
J
~
Previously calculated load matching
• Mismatch of the moment of inertia
Relevant topics:
Possible message:
Max. mismatch is higher than permissible mismatch
cos ϕ
Power factor
IP
Protection type of the motor
Cooling
Type of motor cooling
S Naturally ventilated (surface-ventilated)
E Self-ventilated (integral fan)
F Forced ventilated
V
rated
V
V
Rated voltage
Y/Δ
Connection method
S Y-connection
D Δconnection