SMPS Vs Transformer for 4KVA DC output

Discussion in 'The Projects Forum' started by Bhargavkr, Jun 16, 2009.

  1. Bhargavkr

    Thread Starter New Member

    Jun 16, 2009
    Hi ,
    Iam a Mechanical engineer experimenting with Electrolysis equipment and got suggested by a friend of mine to replace an existing part of my Auto transformer based power supply . Please see picture attached .

    Description of circuit :
    Inlet Voltage : 220V AC wall inlet

    Output Voltage : 200 VDC
    Output current : 15 AMPS continuous

    (1) The friend told me that using SMPS instead of Transformer design will give me savings on Electricity consumption . IS this true ?

    (2) What exactly will be the difference between a transformer based DC power supply to SMPS ?

    (3) How feasible will it be to construct a SMPS of such a output wattage ( almost 4KVA ) ? What impact on the price can i expect if we include adjustable output Voltage and current feature on SMPS ?

    (4) Any ideas about the target price of such a product ? Any potential company that i may approach ? Iam located in India.

    Thanks for your time.

    Last edited: Jun 18, 2009
  2. Bhargavkr

    Thread Starter New Member

    Jun 16, 2009
    I guess the title was misleading . It is SMPS vs Auto transformer ( Variac ) . Please do let me know if it is the wrong forum :(
  3. kubeek

    AAC Fanatic!

    Sep 20, 2005
    If your setup works right, I don't think there is any reason to go for a costly new SMPS. Transformers are quite efficient things, so I don't think a SMPS will make any difference to your electrical bill, and it would have to be custom-made and will cost a lot.