If the drive has field current regulator, the field voltage will increase as the temperature (and resistance) of the winding increases.
Only half the field is burnt – the inner windings? May be due to too thin wire being used.
Some field windings are wound with larger wire dimensions in the...
Thank you for your interest.
The current limit is set according to the motor In = 527A which is much lower than the drive In = 800A, the overcurrent protection is set to motor In x 1.05.
Yes, the peaks are there when the thyristors overlap and from what I have been able to find about thyristor...
Hello all
Can anyone here in the forum explain the reason for the steep peaks in this current curve measured in a dc drive (ASEA Tyrak8) at high load. The fault was detected after a disconnect for overcurrent, from the drive's electronic overload protection. The system could be restarted shortly...
