Lenze 9400 Uživatelský manuál stáhnout pdf (Strana 144)

5 Motor interface

5.4 Servo control (SC)

144

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

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

5.4.1.1 Optimising the current controller

An optimisation of the current controller is useful, as the two controller parameters gain (C00075)

and reset time (C00076

) depend on the maximum current required and the switching frequency set.

For this purpose, the controller parameters only need to be adapted once at a fixed switching

frequency.

We recommend to select a switching frequency

• as low as possible if the controller is to be operated frequently at the maximum current limit.

• of 8 kHz (up to and including model 7) or 4 kHz (from model 8 onwards) if the maximum current

limit will not be reached or will only be reached rarely.

The controller parameters are then automatically adapted to the other switching frequencies.

In a test mode you can select current setpoint step-changes and optimise the setting of both control

parameters by evaluating the step responses.

• The starting values for gain and reset time can be calculated with the following formula:

 Note!

The current controller should always be optimised if a motor of a third-party

manufacturer with unknown motor data is used!

Gain

Stator leakage inductance

340 μs

-------------------------------------------------------------------=

Reset time

Stator leakage inductance

Stator resistance

-------------------------------------------------------------------=

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 953 954

Komentáře k této Příručce

Žádné komentáře