ZkfU3uUO96s/Vk1qeGyiVqI/AAAAAAAAAlg/tS1YlVeqW2M/s576-Ic42/secondary.jpg]];var lpix_1=pix_1.length;var p1_0= [[484' alt='Transformer Winding Calculation Software' title='Transformer Winding Calculation Software' />Because it has three resins 1. Transformer winding consists Copper and copper losses are occurs in winding due to currentI. Transformer core obliviously made by. Im not an electrical engineer, but looking into a transformer issue. Does MVA rating refer to primary or secondary side of transformer I know there should be. Transformers-Calculator-for-Android.jpg' alt='Transformer Winding Calculation Software' title='Transformer Winding Calculation Software' />V, 5 Amp SMPS Battery Charger Circuit. Naruto Shippuden Dragon Blade Chronicles Iso. In this article we study a simple flyback converter design which is implemented as an SMPS 1. V, 5amp battery charger power supply. The proposed 1. 2V, 5 amp smps battery charger circuit employs a flyback converter topology which results in the required smps based high current, compact, mains isolated converter design. Here, the a high power mosfet becomes the main switching component and is used for triggering the ferrite primary winding with the set high frequency mains rectified Dc. When switched ON, the 4. The above action induces a voltage across the auxiliary winding of the transformer which results in a feedback voltage to the mosfet gate via the 2n. V capacitor forcing the mosfet to conduct even harder. As soon as this happens, the primary winding gets connected with the full 3. V DC rectified voltage via the mosfet drainsource terminals. During this process, the voltage across the 0. V level, which instantly triggers the transistor BC5. OFF. This also ensures cutting of the auxillary feedback voltage, restoring the entire primary section to its original switched OFF state. The cycle now begins afresh and is switched continuously at around 6. Hz rate which may be varied by increasing or decreasing the values of the 2n. F base capacitor of BC5. NPN its not recommended though. During the switched OFF periods of the primary winding, an induced equivalent back emf is transferred to the secondary winding which translates it into the specified stepped down low voltage, high current secondary output. The above secondary output is appropriately rectified and filtered by the high current diode and a filter capacitor. A feedback stage across the secondary and the primary stages is implemented via a optocoupler which determines the required fixed, regulated output voltage. The zener associated with the optocoupler may be tweaked for getting different stabilized outputs for the desired applications. Here it has been fixed to about 1. V which becomes the optimal level for charging a 1. V lead acid battery. The current output of this transformerless 1. V, 5 amp smps battery charger can also be changed by two methods. Either by modifying the secondary wire thickness of the transformer or by tweaking the value of the 0. The input stage typically consists of a bridge rectifier stage, followed by an NTC and filter stage. The input EMI coil is optional. Circuit Schematic. How to Wind the ferrite transformer. The ferrite transformer is wound over a 1. EE ferrite core compatible plastic bobbin. The one half primary is wound first, using a 0. Secure the end of this on one of the primary side pins of the bobbin. Cover the winding with a layer of insulation tape. Next wind the secondary winding 5 turns using 0. Terminate the ends on the secondary pins of the bobbin. Apply insulation tape over this winding. On this wind 3 turns of 0. Finally continue from the secured end of the first primary winding and wind 1. Put a few layers of insulation tape to finalize the winding insulation. Fix the EE cores and tape it yet again along its periphery. Make sure the EE core edges are separated with an air gap through a piece of insulation tape or a paper, this will prevent core saturation and stalling of the desired smps induction. THE CIRCUIT EXPLAINED ABOVE IS NOT ISOLATED FROM MAINS, AND THEREFORE IS EXTREMELY DANGEROUS TO TOUCH WHILE EXPERIMENTING IN POWERED CONDITION, AND ALSO THE DESIGN IS RECOMMENDED SPECIFICALLY FOR USERS HAVING ADVANCED KNOWLEDGE IN THE FIELD, NOT FOR THE NEWBIES. Liked it Please, Share it.