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RALE Design Examples of
Power Transformer and Inductor  Applications

Small Power Transformer Applications

 

Description

File

1

How we do design small power transformers

CAL0001E.pdf

2

Inherently shortt-circuit-proof, potted safety power transformer up to 10VA, 50Hz

CAL0002e.pdf

3

Not short-circuit-proof-low profile safety power transformeras,protected by a miniature fuse,18VA, 50Hz

CAL0003e.pdf

4

Non-inherently shortt-circuit-proof,protected by thermal fuse, safety halogen lamp power transformer, 60VA, 50Hz

CAL0004e.pdf

5

Rectifier safety power transformer for feed to voltage controllers of 5Vdc, 1Adc and 2x12Vdc,0.1Adc with RC-load

CAL0005e.pdf

6

Three-phase rectifier, safety power transformer for 24Vdc, 80Adc supply with RC load

CAL0006E.pdf

7

Low inrush current universal control power transformer, 800VA,50Hz

CAL0007E.pdf

8

8000VA power transformer for medical premises

CAL0008e.pdf

9

50kHz, 1200VA power transformer CAL0009E.pdf

10

100kHz, flyback transformers for input voltage125-700Vdc and power up to 500W CAL0010E.pdf

11

250kHz, 120W forward transformer with voltage controller, for input voltage range 200V to 350V CAL0011E.pdf

12

Low inrush current three phase universal autotransformer for 10kVA continuous output power CAL0012E.pdf
13 Motor starting three-phase power autotransformer for 100kVA continuous motor power CAL0013E.pdf
14 Non-short-circuit-proof, low profile safety transformers up to 42VA,in accordance with IEC 61558,protected by miniature fuse as per IEC 127 CAL0014E.pdf
     

 

Large Power Transformer Applications

Nr.

Description

File

1


Designing a simple 50kVA, 50Hz, 3 phase power transformer, in metric
 
 

2


Designing a 3 phase 500kVA, K-Factor=20,
 3x480V /3x208V /120V (DYn),60Hz,power transformer,in USA unita

 
 

3

 

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

 

 
4

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

 

5


Designing a 3 phase (Y0-Y0-Y12), 50Hz, high current rectifier transformer for Udc=12Vdc, Idc=30000Adc 
 
 

5


Designing a 1600kVA, 35kV, 50Hz Distribution Oil Transformer
 
 
Designing a  and 1600kVA, 35kV, 50Hz Distribution Oil Transforme and Oil Tank 
 
 

 

Creatung Input to Design the Rectifier Transformers  NEW
 
 
  Designing a 3 phase, 100kVA, 50Hz inverter transformer  
  Designing a single phase, 10kVA, 50-2000Hz frequency converter transformer  
  Designing a single phase, 1kVA, 50/60Hz transformer with cooling channels  
  Designing a 3 phase,1MVA, 50Hz, "dry" distribution transformer 3x35kVA/3x400V  
  Designing a single phase,100VA, 50Hz, transformer for duty cycle operation mode 10seconds-ON, 10 minutes OFF  
     
     
     

 

 

Small Choke Applicattions

Nr.

Description

File

1

How we do design  chokes an inductors

 

CAL3001E.pdf

2

Designing motor Filter Chokes  

3

Power Factor Correcton Chokes  

4

Commutation Chokes  

5

Smoothing Chokes  

6

LC Filter Chokes  
  Current Compensated Chokes:
One-Phase Common Mode Choke
Three-Phase Common Mode Choke
Drenage Chokes
 
  Indirect water cooled 3 phase inverter choke, 0.5mH, 600Arms, 60Hz  
  Motor Starting Chokes  
     
     
     
     

 

Rale's Technical Papers

Nr.

Description

File

1

Constant Current Transformer  

2

Transformer UI-Design  

3

Balancing 3 phase net wit a single phase Load New
3


Rale's workshop on CWIEME 2008 in Chicago

This Rale workshop approaches the design of transformers for a Transformer Manufacturer from point of view of a buyer and/or user of transformers. To demonstrate these applications, Rale selected about 20 design examples as follows:

  • Designing inherently short-circuit-proof, potted safety transformers 12V, 0.166A in accordance with IEC 61558
  • Designing inherently current limited, potted safety transformers 10V, 5A in accordance with UL 1585 Class 2
  • Designing inherently current limited single phase transformer 24V, 100A with integrated inductor
  • Designing high voltage ,potted transformers 10kV, 0.1A, 1500Hz
  • Designing mixed operation mode transformer, 230V/115V, 10A in autotransformer and 230V/115V, 10A galvanic separated connection
  • Designing three phase autotransformer, for 3x400V/3x380V, 10kVA output power and 25% one phase unsymmetrical load
  • Designing three phase, low inrush current universal autotransformer for 3x208V/120V, 50/60Hz, 9A
  • Designing rectifier transformer for battery charger 6Vdc, 40dc
    Designing rectifier transformer for welding with 26Vdc, 200Adc
    Designing the audio transformer for loudspeaker 25W, 16_Ohm
    Designing flyback transformer for capacitor charger 10kVdc, 0.1 F, 50W
  • Designing a 500 kVA, 60Hz, K-Factor, three phase dry transformer with cooling channels?
  • Designing a 3 phase, 50/60Hz rectifier transformer (YYD to supress 5. and 7. harmonics) with 2 parallel connected bridge rectifiers, for Udc = 400V and Idc = 1000A
  • Designing a 12Vdc, 30kAdc Rectifier Transformer
  • Designing a 1600kVA/35kVA, 50Hz Distribution Oil Transformer 
  • Designing Water Cooled Inverter Filter Choke, 0.5mH, 600Arms, 60Hz
    Power Factor Correction Chokes
  • Commutation Chokes
    Smoothing Chokes
    LC-Filter Chokes
    Current Compensated Chokes

The concept is to assist the Transformer Manufacturers to incorporate transformer designs as an integral part their business and also for the Transformer Manufacturers to get a better overview about new applications that they could be easily integrated in their production using Rale's design software. For this reason Rale has included very powerful design guidelines, for instance relating to water cooling, high voltage spacing, etc.
 


Workshop.pdf
 7.7MB