Page 7.6 - 6 COMBIVERT F5-A, -E, -H © KEB, 2012-10
Motor data and controller adjustments of the synchronous motor
7.6.1.5 IPM motors (reluctance torque)
Addr. Parameter Name Value Function
1128h dS.40
Torque mode 0: Off No support of the reluctance torque
1: on Calculation of the reluctance torque for the
operation without encoder "SCL“
2: On +Isd Tab (cS.35) Calculation of the reluctance torque with set-
ting of Id
Ref
from the table in cS.35.
→ Only for operation with encoder feedback!
0F22h cS.34
Set torque isq
table
0...127 Index
0F23h cS.35
Set torque isd
table
+ / 32000
Internal ADC -current resolution norm. Index
127 corresponds to the max. torque in dr.33
A reluctance torque can only be generated if there are differences in the inductance of the d/q axis. The in-
ductance (dr. 64) is indicated as Lsq and the inductance (dr. 31) as Lsd. This is particularly pronounced for IPM
motors (LSQ> Lsd). A current in the D-axis must be provided depending on the set torque in order to use the re-
luctance torque. The function IdRef = f (MRef) is too complex to be calculated in the inverter. It is calculated with
a KEB excel tool and stored as download in table cS.35. Please contact KEB to obtain the tool. If it is operated
in SCL mode (operation without encoder feedback) the presetting may not be activated. Here the magnetizing
current is automatically adjusted optimal by an angle deviation error in the estimation.
Torque equation of the PMSM :
→ M = 3 * zp [ isd * isq * (Lsd - Lsq) + Ψ
p
* Isq ]
To Next Page
Loading...
Need help?
General
