8monitoring functions – Lenze i700 User Manual
Page 246
8
Monitoring functions
8.4
Monitoring of the motor utilisation (I²xt)
246
Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
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8.4.1
Example of how to enter the characteristic for standard and servo motors
The required data of the operating points result from the S1 characteristic of the prevailing motor:
Examples for S1 characteristics
Standard motor
* Standard motor forced ventilated
** Standard motor self-ventilated
Servo motor
Servo motor with derating at standstill
Object
Characteristic point
Info
Axis A
Axis B
0x2D4D:1 0x354D:1
n
1
/n
n
* 100 %
Speed = "0" (standstill)
0x2D4D:2 0x354D:2
I
1
/I
n
* 100 %
Permissible motor current at standstill
0x2D4D:3 0x354D:3
n
2
/n
n
* 100 %
Speed from which the current must be reduced for self-ventilated
motors.
• Below this speed the cooling air flow of the integral fan is not
sufficient anymore.
0x2D4D:4 0x354D:4
I
2
/I
n
* 100 %
Permissible motor current at speed n
2
(torque reduction)
0x2D4D:5 0x354D:5
n
3
/n
n
* 100 %
Rated speed
0x2D4D:6 0x354D:6
I
3
/I
n
* 100 %
Permissible motor current at rated speed
0x2D4D:7 0x354D:7
n
4
/n
n
* 100 %
Speed above the rated speed (in the field weakening range for
asynchronous motors)
0x2D4D:8 0x354D:8
I
4
/I
n
* 100 %
Permissible motor current at speed n
4
(field weakening)
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
160
I/I * 100 %
n
n/n
n
* 100 %
*
**
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
160
I/I * 100 %
n
n/n
n
* 100 %
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
160
I/I * 100 %
n
n/n
n
* 100 %