Question

part g

Q4. Most electronic systems need a dc voltage to work properly. The AC-to-DC power supply system is including a transformer, a rectifier and a capacitor input filter. The AC input voltage is 110 Vrms at 60 Hz. (a) Draw the full wave bridge rectifier circuit with transformer which steps down voltage to safer and lower levels that are more suitable for use with diodes (b) Show how the capacitor input filter connects to the rectifier output in the drawing at (a). (c) Describe the functions of the full wave bridge rectifier and the capacitor input filter (d) If the turn ratio of the transformer is n :1 where n = N2N1 and the load resistor is RL, find the rectifier output DC load voltage and output frequency if the diodes are ideal. (N2 10.N1-10, R 8n) (e) Sketch the rectifier output waveform the DC power supply with appropriate parameters. (f) If the capacitance of 150μF is used in the capacitor input filter, find the ripple voltage of the power supply (g) Sketch the filter output waveform with appropriate parameters.

Answer 1

aui PEA KIPPLE Voc WITHOUT caPhCTIOR tine 1ド T1 RC 8X150 지 X60

SINCE THE CAPACITOR WAS IN MICROFARADS MAGNITUDE AND RIPPLE VOLTAGE BEING INVERESELY PROPORTIONAL TO THE CAPACITOR , WE HAVE VERY HIGH RIPPLE AT THE FILTER OUTPUT END and this causes huge difference between the Rectifier output voltage and Peak voltage of 2160 Volts.

Also Do not treat difference of V_DC and V _PEAK as ripple voltage , since ripple voltage depends on CAPACITOR RATING !!!!