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PHASE-ANGLE CONTROL OF SCR USING AT89C51


Posted by: seminar class
Created at: Tuesday 22nd of March 2011 12:35:11 AM
Last Edited Or Replied at :Monday 22nd of April 2013 01:54:25 AM
phase angle control using scr , thyristor phase angle, scr zero crossing current detector , thyristor angle control, phase ange control in phase controlled rectifiers , zero crossing detector for 230v, firing angle pdf ppt , thyristor firing angle through microprocessor, ppt for firing of thyristor based on microcontroller , use scr to phase shift for controlling current, how to genarate firing pulses for scr , phase angle control of scr, scr zero crossing detector , microcontroller based 3ph firing angle control fundamentals, thyristor fire angle controller with microcontroller , zero crossing detector based scr firing, standalone zero crossing detector , at89c51,
rupt 0 and the message ‘SCR on.’ So after every 10ms, external interrupt INT1 is generated which starts the entire operation. Pressing switch S1 again disables external interrupt 0 and the message ‘SCR off’ is displayed. The complete SCR operation gets shut off.
On pressing S2, the delay increases by 1 ms (firing angle will shift by 18º) and firing of SCR is delayed by 1 ms. The power delivered to the load is also decreased by 10 per cent. The maximum delay that can be applied is 9 ms which will delay firing by an angle of 162º.When the limit is reached, it is indicated by LED3 and..................[:=> Show Contents <=:]



PHASE-ANGLE CONTROL OF SCR USING AT89C51


Posted by: seminar class
Created at: Tuesday 22nd of March 2011 12:35:11 AM
Last Edited Or Replied at :Monday 22nd of April 2013 01:54:25 AM
phase angle control using scr , thyristor phase angle, scr zero crossing current detector , thyristor angle control, phase ange control in phase controlled rectifiers , zero crossing detector for 230v, firing angle pdf ppt , thyristor firing angle through microprocessor, ppt for firing of thyristor based on microcontroller , use scr to phase shift for controlling current, how to genarate firing pulses for scr , phase angle control of scr, scr zero crossing detector , microcontroller based 3ph firing angle control fundamentals, thyristor fire angle controller with microcontroller , zero crossing detector based scr firing, standalone zero crossing detector , at89c51,
ic3). Capacitors C2 and C3 are used forpassing the ripples present in the regulated 5V power supply. A capacitor above 10µF is connected across the output of the regulator IC, while diode D6 protects the regulator IC in case their input is short to ground. LED5 acts as the Power-on indicator and resistor R5 limits the current through LED5.
This regulated 5V is also used as biasing voltage for both transistors (T1and T2) and the control section. A pulsating DC voltage is applied to the base of transistor T1 through diode D5 and resistors R1 and R2. When the pulsating voltage goes to zero, th..................[:=> Show Contents <=:]



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