Automationdrive Fc 301 Vs. Automationdrive Fc 302 Control Principle - Danfoss FC 300 Design Manual

3 Introduction to AutomationDrive FC 300

3.2.3 AutomationDrive FC 301 vs. AutomationDrive FC 302 Control Principle

AutomationDrive FC 301 is a general purpose frequency converter for variable speed applications. The control principle is based on Voltage Vector Control
(VVC plus ).
AutomationDrive FC 301 can handle asynchronous motors only.
The current sensing principle in AutomationDrive FC 301 is based on current measurement in the DC link or motor phase. The ground fault protection
on the motor side is solved by a de-saturation circuit in the IGBTs connected to the control board.
Short circuit behaviour on AutomationDrive FC 301 depends on the current transducer in the positive DC link and the desaturation protection with feedback
3
from the 3 lower IGBT's and the brake.
Illustration 3.1: AutomationDrive FC 301
AutomationDrive FC 302 is a high performance frequency converter for demanding applications. The frequency converter can handle various kinds of
motor control principles such as U/f special motor mode, VVC
AutomationDrive FC 302 is able to handle Permanent Magnet Synchronous Motors (Brushless servo motors) as well as normal squirrel cage asynchronous
motors.
Short circuit behaviour on AutomationDrive FC 302 depends on the 3 current transducers in the motor phases and the desaturation protection with
feedback from the brake.
Illustration 3.2: AutomationDrive FC 302
20
plus or Flux Vector motor control.
MG.33.BC.02 - VLT ® is a registered Danfoss trademark
FC 300 Design Guide