Title

Three-Phase LC-Resonance Filter Choke, connected in series with capacitor

Input

·         Set  inductance at peak current (View the peak value on the current diagram). The resonance frequency is 189Hz for Ul/Uc=7%

·         Select the AC inductance : L-Type = 1

·         Select Cu round wire: Wire = 0

·         The frequency of the first harmonic is 50Hz

·         Set the rms values of harmonics of the thermal current. These harmonics have to be prescribed by your customer!

·         Set the temperature rise

·         Select grain oriented steel. Note that the induction will be optimized by program in order to get optimal relationship between core losses and winding losses

·         Set Gap = 1 and Core Assembly = 2 or better

·         Select  suitable 3 phase core family. If there are 3. and 9. harmonics (circuit c) then you need to use 3 one phase cores.

Output

·         Control the value of induction, gap and connected wires in parallel

Test

·         Round the number of turns

Note

·         In order to calibrate the choke, connect it on the calculated calibration 3 phase AC-voltages (rms value) with the calibration frequency (normally 50Hz or 60Hz) and then vary the gap until you get the calculated calibration 3 phase AC-current (rms value).