RALE Engineering  GmbH provides you with design examples for typical small transformers, large transformers, toroidal transformers and small chokes & inductors

FOR FREE

to help you save time and money.

Check them out and benefit from RALE’s know-how.

Get a booklet with 13 design examples (assembled by Pamela and Dan – our representatives for USA and Canada).

Below you will find design examples. We have also included the input files for almost each of the examples. You will find most of them at the top of each example. Just click.

– Designing inherently short-circuit-proof, potted safety transformers up to 10VA with the Rale Design Software, in accordance with IEC 61558

– Design a not short-circuit-proof 18VA – low profile safety transformer as per IEC 61558, protected by a miniature fuse in accordance with IEC 127.

– Design a 60VA (long stack EI42/98) – non-inherently short-circuit proof safety transformer for halogen lamps in accordance with IEC 61558, protected by a thermal fuse

– Design a rectifier safety transformer for feed to voltage controllers of 5Vdc,1Adc and 2x12Vdc,0.1Adc with RC-loading accordance with IEC 61558

– Design a three-phase rectifier/safety transformer for 24Vdc, 80Adc with RC load, as per IEC 38 and IEC 61558 ?

– Design a low inrush current universal control transformer for 800VA continuous output power
 as per IEC 61558

– Design an 8000VA transformer for medical premises in accordance with IEC 61558 

– Design a 50kHz, 1200VA transformer as per IEC 61558

– Design a 100kHz, universal flyback transformer for input voltage125-700Vdc and output power 200W

– Design a 250kHz, 120W forward transformer with voltage controller, for input voltage range 200V to 350V, as per IEC 61558

– Design a low inrush current three phase universal autotransformer for 10kVA continuous output power as per IEC 61558

– Design a motor starting three-phase autotransformer for 100kVA continuous motor power as per IEC 61558

– Designing non-short-circuit-proof, low profile safety transformers up to 42VA with Rale Design System, in accordance with IEC 61558,
protected by miniature fuse as per IEC 127

– Design a 50kHz, 240W resonance transformer for a LLC converter.

– Designing a 500 kVA, 50Hz, K-Factor 20, three phase dry transformer with litz & foil

– Designing a 3 phase, 50/60Hz rectifier transformer  (YYD) to suppress 5.and 7.current harmonics with 2 parallel connected bridge rectifiers for Udc=400V, Idc=1000A

– Designing a 12Vdc, 30kAdc Rectifier Transformer

– Designing a 1600kVA/35kV, 50Hz Distribution Oil Transformer with oil tank

– Designing an autotransformer for  400Vdc, 1000Adc with 2 parallel connected rectifiers in 12-pulse operating mode

– Creating a 4 lines 3 phases net in a 3 lines 3 phases net using a Zn-transformer

– Creating the Inputs to Design Rectifier Transformers

– Designing 24 pulse rectifier 4 x 600Vdc/1000Adc with 2 dry Dext/YD transformers, driven by 3 x 6000V, 50 Hz

– Designing a 200kVA, Three Phase Transformer, 400V/400V,50 Hz, DY with Indirect Water Cooling

– Designing a Constant Voltage Stabilizer 2000W, 1000V +-20%/11V+-1%,50Hz short circuit proof

Information for our customers: All single phase design examples (up to 10 kVA, 50/60 Hz) calculated with the Small Transformer Program can also be calculated with the Toroidal Transformer Program.

– How do we design a toroidal current transformer?

– Designing Motor Filter Chokes

– Single Phase, 25mH Common Mode Choke in 50 Hz net for suppressing up to 50 kHz current harmonics 

– Designing Power Factor Correction Chokes 

– Single Phase Commutation Choke

– Three Phase Commutation Choke

– Designing Smoothing Chokes

– Designing 3 Phase LC-Filter For Power Factor Correction, 50kVAr, parallel to Rectifier Bridge

– Single Phase, 25mH Common Mode Choke in 50Hz net for suppressing up to 50kHz current harmonics

– Drainage Choke between 2 parallel connected rectifiers 2x(24Vdc,500Adc) at 50Hz to support good DC current distribution and limit 150Hz current harmonic