File translated into English by Vladimir Denisenko and Andrew Buckin

[TITLE]
title = Forward - Calculation of single-ended forward converter transformer
version = Version

[ABOUT]
s1 = Vladimir Denisenko, Russia, Pskov
s2 = I would be thankful for financial support

[MENU]
s1 = About
s2 = Help
s3 = Language
s4 = English

[BASE CORES]
s1 = Magnetic core
s2 = Shape
s3 = Material
s4 = Dimensions of the core:
s5 = Parameters of the core:
s6 = Effective permeability
s7 = Effective cross section area
s8 = Area of the core window
s9 = Length of the magnetic path
s10 = Volume of the core
s11 = Ae, mm2
s12 = An, mm2
s13 = le, mm
s14 = Ve, cm3
s15 = Other
s16 = Adding to database (input dimensions)
s17 = Adding to database (input data)
s18 = Add to database
s19 = Delete from database
s20 = Please enter the name for the new core when you add it to the database.
s21 = For "Other" core type please use actual specs from the specified ferrite manufacturers i.e. TDK, Ferroxcube, Cosmo etc.
s22 = Enter the dimensions for simple core types, such as ring or EE.
s23 = Enter the parameters for complex core types, such as RM or PQ.
s24 = You forgot to enter a name for the core.
s25 = You forgot to enter the permeability.
s26 = You forgot to enter all dimensions.
s27 = You forgot to enter all parameters.
s28 = Are you sure you want to remove it from the core database?

[INITIAL DATA]
s1 = Initial data
s2 = Value of the non-magnetic gap, mm
s3 = Amplitude of flux density, not above, T
s4 = Remanence (desired), T
s5 = Duty cycle, maximum
s6 = Switching frequency, kHz
s7 = Winding fill factor
s8 = Current density, A/mm2
s9 = Rds(on), Ohm
s10 = Saturation voltage, V
s11 = Input voltage (min., rated, max.), V
s12 = Secondary windings (outputs)
s13 = Rated voltage, V
s14 = Rated current, A
s15 = Minimal current, A
s16 = Diode's forward voltage, V
s17 = Diameter of the wires (desired)
s18 = Standard of wires
s19 = Metrical, mm
s20 = Standard AWG
s21 = AWG
s22 = DC
s23 = AC
s24 = Wires size (desired)
s25 = Use the desired diameters of the wires
s26 = 
s27 = 
s28 = 
s29 = 
s30 = The current density depends on the cooling conditions and the size of the core.\nWith natural cooling one should choose 4-6A/mm^2.\nIf a fan is used, the current density can be set higher, up to 8-10A/mm^2.\nHigher current density indicates smaller cores.\nWith artificial cooling, the allowed current density depends on its intensity.
s31 = The winding fill factor describes what part of the core window is filled by the winding.\nThe winding fill factor can be in the range of 0.1-0.4, depending on the size of the core, lower values indicate smaller sizes.
s32 = Flux density range is 50-300mT. The hysteresis losses depend on the combination of the flux density and frequency.\nAt high frequencies and high flux density, the losses will turn out to be so high, that the heating of the core will exceed reasonable limits.\nHence the peak flux density is limited automatically depending on the entered frequency.
s33 = Frequency range is 25-300 kHz.\nWe see no reason for DIY to run faster due to higher switching losses and potentially worse EMI performance.
s34 = This field is for the maximum duty cycle. Should apply UC3844 controllers, and the like with the working time is not more than 50% or push-pull controllers, but use only one output.
s35 = In this field the resistance of the open channel has to be entered Rds(on).
s36 = This field is for the BJT or IGBT saturation voltage.\nFor field-effect transistors this field shows the calculated value for the voltage loss of the transistor.
s37 = This switch is used for MOSFET.
s38 = This switch is used for BJT or IGBT saturation voltage.
s39 = The calculation is made assuming minimal input voltage.\nPlease note, that feedback is taken from the first output ONLY, so it is better if it will be the rail with the highest load.\nTo improve the regulation for all rails together try using the common choke.
s40 = These fields are for the minimal current consumption value, which is used for the calculation of the minimal inductance for the output choke.\nFor instance it can be the bias current of the amp etc.\nOne should not set the value too low though, because it can result in high inductance. It might be hard to make an inductor for a high inductance, and a low minimal current, because one has to consider not letting the core reach saturation.
s41 = Please refer to the diode's datasheet and check the Vf parameter for the actual current.\nIf the Diodes aren't loaded with nominal current, then one can evaluate the decline of the entered current by the graph in the datasheet.
s42 = This field is for the desired remanence.
s43 = Primary winding wire diameter.
s44 = To use the desired wire diameters put a tick here.\nI suggest to let the program calculate the diameters of the wires and the number of the wires in the windings first to make the best of a given diameter.

[RESULTS]
s1 = Results of the calculation
s2 = The required non-magnetic gap, not below
s3 = Remanence
s4 = Amplitude of flux density
s5 = Power loss in the core
s6 = Power loss in the transistor
s7 = Power loss in the diodes
s8 = Winding fill factor
s9 = Rated transformer power
s10 = Output power
s11 = Primary inductance
s12 = Primary magnetizing current
s13 = Amplitude of primary current
s14 = Current consumption
s15 = Primary winding turns and degaussing winding turns
s16 = Wire diameter for the primary winding
s17 = Wire diameter for the degaussing winding
s18 = Wire skin diameter
s19 = Secondary windings (outputs)
s20 = Winding turns
s21 = Diameter õ number
s22 = Volt. ampl. min, V
s23 = Volt. ampl. rated, V
s24 = Volt. ampl. max, V
s25 = Choke inductance, µH
s26 = Size õ number
s27 = Efficiency (copper losses are excluded)
s28 = Duty cycle for input voltage
s29 = min.        rated       max.
s30 = Wire size for the primary winding
s31 = Wire size for the degaussing winding
s32 = Winding fill factor is above 0.4.\nCalculate layout of the winding or select a larger core.

[BUTTONS]
s1 = Exit
s2 = Calculate
s3 = Load
s4 = Save
s5 = Load initial data from a .sav file.
s6 = Save initial data as a .sav file.

[OTHERS]
s1 = Open file
s2 = Open
s3 = Save as
s4 = Save
s5 = File name
s6 = Replace the file
s7 = Cancel
s8 = Attention!
s9 = The file is not in the root folder
s10 = V
s11 = A
s12 = W
s13 = kHz
s14 = mH
s15 = µH
s16 = µS
s17 = Ohm
s18 = mm
s19 = T
s20 = A/mm2
s21 = Drop at the transistors is too large.\nIncorrectly selected transistors.\nLarge channel resistance or saturation voltage.
s22 = Number of turns of the primary coil is < 4!\nReduce the frequency.
s23 = Winding fill factor is above 0.3.\nCalculate layout of the winding or select a larger core.
s24 = The desired diameter is replaced by the nearest standard diameter
