nikhil arora Posted June 28, 2006 Report Share Posted June 28, 2006 how to reduce transformer heatinghow to take away heat from the transfomer as we use heatsing for transistors is this possible with transformerMy ckt needs 5.1V@200mA i have used 9Vac transformer 500mA rating on its box i cann't say how much it can deliver.Now i am drawing only 200mA even though it is heating. Quote Link to comment Share on other sites More sharing options...
ante Posted June 28, 2006 Report Share Posted June 28, 2006 Hi,Yes you can keep the transformer cooler if you bolt it to a metal chassis and put some heatsink compound in between. If it’s a toroide transformer you do it the opposite way, space it from the chassis and install a fan to keep it cool. Before you do any of the above, make sure you are not overloading your transformers ratings. Quote Link to comment Share on other sites More sharing options...
nikhil arora Posted June 29, 2006 Author Report Share Posted June 29, 2006 my ckt required only 200mA at 5.1V and transformer rating says 9Vac 500mA Quote Link to comment Share on other sites More sharing options...
audioguru Posted June 29, 2006 Report Share Posted June 29, 2006 A very poor quality (cheap) transformer heats too much:1) If it doesn't have enough turns in its windings then it heats even without a load.2) If the wire in its windings is too thin then it has too high a resistance which causes heat with a load. Then the voltage will be much higher without a load. Quote Link to comment Share on other sites More sharing options...
nikhil arora Posted June 30, 2006 Author Report Share Posted June 30, 2006 i think this is the problemso how to check the transfomer qualityin my city the quality is poor most of the timesis there any method to check transformer qualityI tested my ckt without load and even without regulator ckt only transformer was kept on and i observed that 70-80% percentange of heating was due to transformer itself. Quote Link to comment Share on other sites More sharing options...
audioguru Posted June 30, 2006 Report Share Posted June 30, 2006 I Quote Link to comment Share on other sites More sharing options...
nikhil arora Posted July 3, 2006 Author Report Share Posted July 3, 2006 yes another transformer heat is only 5-10% of the heat of the the first onebut the faulty transformer was still working and giving good voltage even it is short it is possbile. Quote Link to comment Share on other sites More sharing options...
nikhil arora Posted July 15, 2006 Author Report Share Posted July 15, 2006 I live in ahmedabad which is in gujarat stateNow can u tell me is there any dealer for maru in my city or near me Quote Link to comment Share on other sites More sharing options...
faizanbrohi Posted July 15, 2006 Report Share Posted July 15, 2006 Hey why not build your own toriodal transfer , i think it should be easy. anyone knows how to make a toriodal transformer Quote Link to comment Share on other sites More sharing options...
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