sasikumar Posted August 16, 2004 Report Share Posted August 16, 2004 Hi..currently im doing my final yr project on "single phase controlled rectifier(scr) for DC motor"...im having problem in designing the scr triggering circuit..my objective is to provide variable dc voltage so that i'd control the speed of motor.. im stuck already...my presentation would be on coming Sept.. at least i must manage to submit the simulation result of the said circuit to my lecture.. im helpless now.. would appreciate ur help if you could give me any sample circuits..plz help me!!!rgds,sasikumar Quote Link to comment Share on other sites More sharing options...
Kevin Weddle Posted August 16, 2004 Report Share Posted August 16, 2004 Your motor will have DC voltage so what is the phase? Phase involves two signals. Are you creating a PWM circuit? Does your motor have multiple windings? An SCR will require a means to turn it off which means you will have to have the voltage required for anode current interuption. If you are dealing with a small voltage then that won't be too difficult. Quote Link to comment Share on other sites More sharing options...
ante Posted August 16, 2004 Report Share Posted August 16, 2004 Kevin,That Quote Link to comment Share on other sites More sharing options...
Kevin Weddle Posted August 16, 2004 Report Share Posted August 16, 2004 Then we are talking PWM? Quote Link to comment Share on other sites More sharing options...
ante Posted August 16, 2004 Report Share Posted August 16, 2004 Kevin,No not PWM, but phase control. If you have Power Point installed in your computer, here it is: http://www.eas.asu.edu/~karady/360_stuff/Lectures/360_Topic_7_Power_Electronics.pptIf not check the PDF, sorry that the pages are sideways.SCR_phase_cont..pdf Quote Link to comment Share on other sites More sharing options...
sasikumar Posted August 18, 2004 Author Report Share Posted August 18, 2004 here i've attached the firing circuit for scr...need ur help to clarify my doubts.. thanksscr_triggering_circuits.zip Quote Link to comment Share on other sites More sharing options...
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