Lenze ECS series User Manual

Technical data
Current characteristics
Increased continuous current depending on the control factor
3

46
EDBCSXA064 EN 3.2
Example:
The ECS axis module suitable for operation in conjunction with a Lenze motor of type
MCS 14L32 is to be determined.
ƒ Rated motor data
– Rated motor torque (M
mot
) = 17.2 Nm
– Rated motor speed (n
mot
) = 3225 rpm
– Motor voltage at 3250 rpm (U
mot_n3250
) = 275 V
– Rated motor current (I
mot
) = 15 A
– Max. motor current (I
mot_max
) = 92 A
ƒ Application data:
– Max. torque (M
max
) = 35 Nm
– Max. operating speed (n
max
) = 2500 rpm
– An effective process power (P
eff
) of 4.5 kW arises on the basis of the Mn diagram.
– The drive rating results in an effective motor current (I
Mot_eff
) of 14.8 A.
A first estimation based on the rated current of the ECS axis module would probably lead
to selecting the ECSxA048 module with a rated current of 17.0 A.
However, if we take into account the increased continuous current for smaller control
factors, the more cost−effective ECSxA032 axis module with a rated current of 12.7 A can
be used here.
ƒ When the MCS 14L32 is operated with 2500 rpm, the real motor voltage is
(U
Mot_n2500
):
U
Mot_n2500
+ U
Mot_n3250
@
n
max
n
Mot
Þ
275V @
2500rpm
3250rpm
+ 212V
ƒ This leads to the following max. control factor (α
max
) of the axis module:
a
max
+
U
Mot_n2500
U
max
Þ
212V
360V
+ 0.59 + 59%
Using the current characteristic of Fig. 3−1 ( 44), a continuous current of 15.5 A can
be determined for the ECSxA032 axis module when the control factor (α
max
) is 59 %.
ƒ Result:
Under the conditions mentioned above the MCS 14L32 Lenze motor can be operated
continuously on the ECSxA032 axis module.

Lenze ECS series Specifications

General

Brand	Lenze
Model	ECS series
Category	Control Unit
Language	English