Winco AS480 User Manual

Page 5

TD_AS480 AVR_04.08_02_GB

EBS - Circuit description:

The EBS comprises an add-on permanent magnet

generator (EBG) with embedded control electronics

(the EBC module).

The main functions of the EBC are as follows:

The Input Rectifier and Power-Supply provides

supplies to the internal control parts of the EBC.

The Micro-controller measures the drive signal

(DR) generated by the AVR and determines the

need for excitation power support. As this support is

required it is delivered at low, medium or high levels to the

exciter field. The AVR control function

maintains generator voltage within broad limits until both

AVR and EBS are fully conducting.

The micro processor contains three timer functions: to

prevent actinnnvation on generator run up, operation below

30Hz and to disconnect the booster power after a period of

boost operation i.e. preventing the generator from

overheating. This function is designed to follow

the approximate thermal state (temperature) of the machine

windings.