Lenze 8400 StateLine C

8400 StateLine C | Reference manual
Motor control (MCTRL)
Sensorless control for synchronous motors (SLPSM)
182 L Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
5.8.4.1 Optimise current controller
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.
 Gain and reset time can be calculated as per the following formulae:
 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«!
Parameter Info Lenze setting
Value Unit
C00075 Vp current controller 7.00 V/A
C00076
Ti current controller 10.61 ms
V
p
= Current controller gain (C00075)
T
i
= Current controller reset time (C00076)
L
ss
= Motor stator leakage inductance (C00085)
R
s
= Motor stator resistance (C00084)
T
E
= Equivalent time constant (= 500 μs)
V
p
L
ss
H[]
T
E
s[]
--------------- -=
T
i
L
ss
H[]
R
s
Ω[]
--------------- -=
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