Transformer Design Software | RALE Switzerland

Title

Swinging Smoothing Choke for 3 Phase Rectifier Bridge

Input

Set two LI-points: 2 inductance at 2 peak currents. Note that the induction corresponds to the first current
Select the differential inductance : L-Type = 4
Select Cu flat wire: Wire = 4
The frequency of the first harmonic is 300Hz
Set the harmonics of the thermal current: the rms-values of the first harmonic and of the DC-current
Set the temperature rise
Select cheap steel. Note that the induction will be optimized by program in order to get 2 prescribed inductance at 2 prescribed currents
Set Gap = 1 and Core Assembly = 2
Select suitable core family

Output	Press Ctrl+L in order see the diagram Inductance vs. Current
Test	Round the number of turns Change the peak value of the second LI-point in order to increase the current range of the diagram Inductance vs. Current
Note	In order to calibrate the choke, connect it on the calculated calibration AC-voltage (rms value) with the calibration frequency (normally 50Hz or 60Hz) and then vary the gap until you get the calculated calibration AC-current (rms value).

Title

Smoothing Choke for 1 Phase Rectifier Bridge

Input

Set the LI-point of the inductance, the induction at the peak current.
Select the differential inductance : L-Type = 4
Select Cu flat wire: Wire = 4
The frequency of the first harmonic is 100Hz
Set the harmonics of the thermal current: the rms-values of the first harmonic and of the DC-current
Set the temperature rise
Select cheap steel.
Set Gap = 1 and Core Assembly = 2
Select suitable core family

Output	Press Ctrl+L in order see the diagram Inductance vs. Current
Test	Round the number of turns Change the peak value in order to increase the current range of the diagram Inductance vs. Current
Note	In order to calibrate the choke, connect it on the calculated calibration AC-voltage (rms value) with the calibration frequency (normally 50Hz or 60Hz) and then vary the gap until you get the calculated calibration AC-current (rms value).

Title

High Frequency Smoothing Choke for 1 Phase Rectifier Bridge

Input

Set the LI-point of the inductance, the induction at the peak current.
Select the differential inductance : L-Type = 4
Select Cu flat wire: Wire = 0
Select core material: ferritee or powder
The frequency of the first harmonic is 50000Hz
Set the harmonics of the thermal current: the rms-values of the first harmonic and of the DC-current
Set the temperature rise
Select suitable core family and the gap position

Output	Press Ctrl+L in order see the diagram Inductance vs. Current
Test	Round the number of turns Change the peak value in order to increase the current range of the diagram Inductance vs. Current
Note	In order to calibrate the choke, connect it on the calculated calibration AC-voltage (rms value) with the calibration frequency (normally 50Hz or 60Hz) and then vary the gap until you get the calculated calibration AC-current (rms value).

Title

Drainage Choke between 2 phases of inverters

Input

Set inductance of both windings in series at approx. 5-10% of the nominal current Iout/2
Select the differential inductance : L-Type = 4
Select Cu flat wire or foil with layer insulation: Wire = 3 or 6
The frequency of the first harmonic is 50Hz
Set the rms values of the harmonics of the thermal current: Note that the sign "+" marks the compensated current harmonics.
Set the temperature rise
Select cold rolled steel.
Set Gap = 1 and Core Assembly = 2 or better
Select suitable core family (UI)

Output	Control the value of inductance
Test	Set the current in the LI-point higher and Press Ctrl+L to see the diagram Inductance vs. Current
Note	In order to calibrate the choke, connect both in series windings on the calculated calibration AC-voltage (rms value) with the calibration frequency (normally 50Hz or 60Hz) and then vary the gap until you get the calculated calibration AC-current (rms value).

Smoothing Chokes