Lenze 9400 Instrukcja Użytkownika Pobierz pdf (Strona 208)

5 Motor interface

5.8 Parameterisable additional functions

208

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

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Example: Voltage increase in the DC bus when field weakening is switched off

(For instance by an active setting of the controller inhibit or by tripping a fault or error at high motor

speed.)

[5-31] Example: Possible DC-bus voltage > 800 V if field weakening gets lost

Field weakening Speed n Motor voltage peak value

Switched off 4000 rpm 560 V

5700 rpm 800 V

6000 rpm

840 V

Switched-on 6000 rpm 560 V

• If pulse inhibit is set at 6000 rpm and switched-on field

weakening, the DC bus is charged to over 800 V ().

• A speed limitation to 5700 rpm is required, as this speed

generates a DC-bus voltage of 800 V when the field

weakening mode is switched off.

n

U

4000

840 V

560 V

6000

> 800 V



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