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???
05/10/05 02:32
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 		 #93252 - AC Vs DC and dv/dt
Responding to: ???'s previous message
Dear Friends, Thanks for your kind responses but there's one more doubt left in mind please help me..

Is there any diffrence in emissions or noise generated due to supply to load being DC or AC. For example consider a case of a

1. Triac such as BT136 switching a 75 V AC 50 Hz across a 75 Ohm resisitive load causing 1A current through load. Firing being random.

2. A Darlington such as TIP127 swithing a 75V DC across same 75 ohm resistive load causing 1A current through load.

Is it true that in case of AC switching noise will be more due to sinus wave and harmonics or it will be same ?

Thanks & Regards,
Prahlad Purohit



List of 38 messages in thread
TopicAuthorDate
Resistive load soft switching.            01/01/70 00:00      
   basically            01/01/70 00:00      
      How is this HF generated that radiate.            01/01/70 00:00      
         Think about it this way...            01/01/70 00:00      
   you're welcome            01/01/70 00:00      
      Re: The underlying reason.            01/01/70 00:00      
         well            01/01/70 00:00      
            Re: Well.            01/01/70 00:00      
               switch with 1kHz & place AM radio nearby            01/01/70 00:00      
                  i agree but how to explain a theory worm            01/01/70 00:00      
                     a simple answer            01/01/70 00:00      
                        Re: Simple Answer.            01/01/70 00:00      
                           dv/dt and dI/dt            01/01/70 00:00      
                              OLD Europe ?            01/01/70 00:00      
                              Thanks Frieder,            01/01/70 00:00      
                           half of a square wave            01/01/70 00:00      
                              Thanks Erik,            01/01/70 00:00      
   WHY            01/01/70 00:00      
      Thanks Steve,            01/01/70 00:00      
   AC Vs DC and dv/dt            01/01/70 00:00      
   DC harmonics            01/01/70 00:00      
      Does mean DC switghin = more emission            01/01/70 00:00      
         generally            01/01/70 00:00      
            Thats why.....            01/01/70 00:00      
               What about negative time            01/01/70 00:00      
      Of course            01/01/70 00:00      
      A lot - sure, but            01/01/70 00:00      
   I suppose so..            01/01/70 00:00      
   Fouier and negative frequencies            01/01/70 00:00      
   Is this not a trick question?            01/01/70 00:00      
   I didnt realise it was all a test....            01/01/70 00:00      
   How to convince your friend...            01/01/70 00:00      
      Thanks Kai.            01/01/70 00:00      
      I am reopening this old thread            01/01/70 00:00      
   What to do with a welding machine??            01/01/70 00:00      
      apologia            01/01/70 00:00      
      what it has to do            01/01/70 00:00      
         Thanks Erik & Kai            01/01/70 00:00      

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