naiming@eng.umd.edu (Naiming Shen) (04/27/91)
I am confused with the definition of regulation of transformers. Say a transformer with 110 volts at primary and 24 volts(rms) at secondary with 10% regulation and 1 Amp(rms) at secondary. What is the correct explaination of this 24 volts(rms)? is this under 0 amp cureent or under full load current(1 amp)? Thanks in advance. -- ***************************************************************************** Naiming Shen naiming@bagend.eng.umd.edu *****************************************************************************
miker@polari.UUCP (Mike Ranta) (04/29/91)
>I am confused with the definition of regulation of transformers. >Say a transformer with 110 volts at primary and 24 volts(rms) at >secondary with 10% regulation and 1 Amp(rms) at secondary. >What is the correct explaination of this 24 volts(rms)? is this under >0 amp cureent or under full load current(1 amp)? The rated voltage is nearly always given at the rated current. The regulation figure indicates that for every 100% increase in load current there will be a 10% decrease in output voltage (within the maximum ratings of course). In other words, if we were to load your particular transformer at 0.5 amps, one would expect a 5% increase in voltage to 25.2 volts rms. This doesn't quite hold true in the limiting case of no load, but it's close.