Optimise Current Controller - Lenze 8400 StateLine C Reference Manual

8400 StateLine C | Reference manual
Motor control (MCTRL)
Sensorless control for synchronous motors (SLPSM)
5.8.4.1

Optimise current controller


Note!
An optimisation of the current controller should generally be carried out unless
a power-adapted standard motor is used or the motor has been selected from
the motor catalogue of the »Engineer«!
An optimisation of the current controller is sensible since the two control parameters gain
(C00075) and reset time (C00076) depend on the required maximum current and the set
switching frequency.
Parameter
C00075
C00076
 Gain and reset time can be calculated as per the following formulae:
V
p
T
i
182
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Info
Vp current controller
Ti current controller
V = Current controller gain (C00075)
p
L H
[ ]
ss T = Current controller reset time (C00076)
i
= --------------- -
T s [ ]
L = Motor stator leakage inductance (C00085)
ss
E
R = Motor stator resistance (C00084)
s
T = Equivalent time constant (= 500 μs)
E
L H
[ ]
ss
= --------------- -
R
[ ] Ω
s
L
Lenze setting
Value Unit
7.00 V/A
10.61 ms
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011