Power transformer design software and applications by RALE

Properties of the Small Transformers Program

Languages	English, French, German, Italian and Spanish
Units	Metric and USA units
Power range per phase at 50/60 Hz	10kVA per phase
Frequency range	10Hz ...500kHz
Input /Output voltage range and form	1V ...10kV, independent of the form (sine wave, rectangular,...)
Primary	Max. 8 taps for the inputs and the outputs in autotransformer operation mode.
Secondary	Max. 8 secondary, connected to the load direct or via the rectifiers with R, RL or RC load, together with autotransformer operation available
Wire	Cu- round and flat wires, with 3 insulation grades
Steels	Cold rolled, grain oriented, Ne-Fe alloys, ferrite, amorphous and powder
Bobbins	Single section, double section and single section without flange, open and closed The cores and bobbins, which do not exist in the core data pools, can be created by user.
Case	Potted and not potted
Core assembly	Alternately stacked EI,UI,..., C-cores, welded, ready cores, modulus cores and alternately stacked strips
Winding assembly	Primary inside or outside, alternately windings 50%/100%/500%, 33%/66%/66%/33% and 25%/50%/50%/50%/25%
Cooling channel	One cooling channel, only in the front and in the back of the winding, between the primary and the secondary
Ventilation	Max. 5m/sec
Impregnation	Dry, one component varnish and 2 components varnish, under vacuum.
Chassis	Wood, printed board, metal
Duty cycle operation mode	Min. time 5 seconds, with 2 times and 2 loads
Criterion of the design:	Regulation of the output voltage: 1% to 150% or Temperature rise in nominal, short-circuit or duty cycle operation: 10°K ...250°K
Induction	Optimized in accordance with the temperature rise, no-load operation and the inrush current
Ambient temperature	-100°C ... 120°C
Core families data pool	EI, EE,..., UI, LL,..., 3PhEI, C-cores, EC, ETD, RM, PM, P, EFD, EPC, RS, DS, PQ,... The cores and bobbins, which do not exist in the core data pools can be created by user.
Design mode	In this mode the program designs in accordance with the input data.
Test and simulating mode	In this mode the user can change manually the turns, wire sizes, loads, input voltage, frequency, duty cycle, steel,... and recalculate the transformer.
Typical applications	DC/DC converters : The program supports flyback, forward (simultaneous too) and all transformers, driven by the "impressed" input voltage or "impressed" input current (bridge, push-pull, resonant,... converters) Battery chargers, Adapters: The program supports the operation of the one and three phase transformers with the rectifiers on the R, RL or RC load Inherently short-circuit proof, not-inherently short-circuit proof and not short-circuit proof transformers Medical transformers Control transformers Universal transformers or universal autotransformers Autotransformers Motor starting transformers or autotransformers Voltage transformers Current transformers Toy transformers Bell transformers Audio transformers Transmitters K-factor transformers