What are the parts of a 48V DC charger?

What are the parts of a 48V DC charger?
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1 Answer

Answer :

Main transformer: This steps down the 3Φ 415V supply to the require value of voltage.

Synchronizing transformer for phase sequence: This gives the synchronizing signal to the firing card. That is, the pulses from this card if fed to the firing card. The firing card gives pulses to the SCR of R or Y or B depending upon which phase is positive maximum.

Half control module: This has a diode and a SCR for each phase. The firing card controls the firing angle of SCR.

Firing card: This gives the firing pulses to SCR depending on phase sequence and the feed back from output.

Controller card: This card monitors the output and gives signal to firing card to conduct at certain angle to maintain constant output voltage.

Power supply card: This gives power supply for the controller card, firing card and protection. 
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