Lenze 9400 Manual de usuario descargar pdf (Pagina 217)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06 217

5 Motor interface

5.9 Monitoring

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Speed-dependent evaluation of the motor current

By selecting a characteristic in C01196/1...8

the permissible motor current is evaluated depending

on speed for calculating the thermal motor utilisation.

• The speed-dependent evaluation can be more or less switched off by setting C01196/1...8

to

"100 %" each. The calculation simplified due to this setting corresponds to the calculation in

previous Lenze devices (e.g. 9300 servo inverter or ECS).

Parameter Characteristic point

C01196/1

n

1

/n

n

Speed = "0" (standstill)

C01196/2

I

1

/I

n

Permissible motor current at standstill

C01196/3

n

2

/n

n

Speed from which the torque must be reduced for self-ventilated motors.

• Below this speed the cooling air flow of the integral fan is not sufficient

anymore.

C01196/4

I

2

/I

n

Permissible motor current at speed n

2

(torque reduction)

C01196/5

n

3

/n

n

Rated speed

C01196/6

I

3

/I

n

Permissible motor current at rated speed

C01196/7

n

4

/n

n

Speed above the rated speed (in the field weakening range for asynchronous

motors)

C01196/8

I

4

/I

n

Permissible motor current at speed n

4

(field weakening)

 Note!

Self-ventilated standard motors are protected insufficiently at low speeds by setting

C01196/1...8

to "100 %" each.

Servo motors, however, do not have a point from which the torque must be reduced due

to a too low speed.

• When setting the characteristic in C01196/1...8

this point must not be ignored. Hence,

point 2 is to be set ideally to point 1 or point 3.

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