Lenze 9400 Bedienungsanleitung PDF herunterladen (Seite 187)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06 187

5 Motor interface

5.6 V/f control (VFCplus)

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5.6.1.5 Defining the current limit (Imax controller)

The current limit for the Imax controller is defined by the maximum current which must be set in

C00022

. If the motor current exceeds the value set in C00022, the Imax controller gets active.

• The Imax controller changes the field frequency so that the motor current does not exceed the

current limit. In motor mode, the frequency is reduced and in generator mode it is increased.

• Gain and reset time of the Imax controller can be parameterised in C00963

and C00964.

Short overview: Parameters for Imax controller

Optimising the Imax controller

• If oscillations occur during operation at the current limit, the Imax controller has to be

decelerated:

•Reduce gain (C00963

)

• Increase reset time (C00964

)

• If the Imax controller does not operate fast enough after having exceeded the current limit, it

must be accelerated:

•Increase gain (C00963

)

• Reduce reset time (C00964

).

Parameter Info Lenze setting

Value Unit

C00022 Maximum current 0.00 A

C00963 VFC: Gain - Imax controller 0.001 Hz/A

C00964

VFC: Reset time - Imax controller 100.0 ms

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