HEIDENHAIN iTNC 530 HSCI - Current Controller

866 HEIDENHAIN Technical Manual iTNC 530 HSCI
6.8.6 Current controller
Up to 20 digital current controllers for the axes and spindle(s) are possible in
the iTNC 530:
The nominal values for magnetizing current I
dnom
and torque current I
qnom
are
divided into the PWM signals U
1
, U
2
and U
3
through a PI controller and vector
rotator VD+, and are transferred to the power module through X51 to X60.
The actual current values I
1act
and I
2act
are determined by the power module
and are transferred to vector rotator VD– through X51 to X60. The vector
rotator determines the actual values of magnetizing current I
dAct
and torque
current I
qNom
.
Circuit diagram:
You adjust the current controller to attain the optimum result, with the position
and speed controller switched off.