Input BScI Filter SemI Regulation Load PaperI Dr

Input BSc-I Filter Sem-I Regulation Load Paper-I Dr. S. S. Jawale Head and Associate Professor Department of Electronics Yeshwantrao Chavan Mahavidyalaya, Tuljapur

Objective: • Design, construct, and test a dc power supply. The power supply includes a transformer, diodes, and a filter. All were investigated in previous experiments. This the major design project in the course.

DC-VOLTAGE POWER SUPPLY OPERATION Alternator Transformer or Power Company Rectifier Filter Regulator Load v t Input: 120 VAC RMS, 60 Hz Steps the input voltage up and down as needed Convert the ac to a pulsing dc Low-pass type for removing voltage variation Keeps voltage constant regardless of load change

Power Company Transformer Rectifier Regulator Load Filter v 167 118 Vrms 16. 7 ms or 60 Hz t

Alternator Transformer or Power Company v 167 Rectifier Filter Regulator Load v 118 Vrms 25. 5 18 Vrms 16. 7 ms or 60 Hz t

Alternator Transformer or Power Company Rectifier Filter v Regulator Load 60 Hz RLoad t half-wave rectifier v RLoad 120 Hz t full-wave rectifier

Alternator Transformer or Power Company v 25. 5 Rectifier ~ 0. 6 V 18 Vrms Filter v 24. 9 Regulator Load 60 Hz 12. 45 Vrms 16. 7 ms or 60 Hz t t half-wave rectifier t

Alternator Transformer or Power Company Rectifier Input sta 1 e g Filter sta 2 e g Filter Regulator Load Regulation Load

Input Filter Regulation Load C v sta 1 e g v ripple Vmax t without C t t with C t

? Vmax ? v ripple VDC 0 t t

Input Filter R Regulation Load C Vinput 2 e g sta One or more filter sections are usually used to reduce the amplitude of the ripple. The filter used in this experiment is a single-section low-pass RC filter.

Alternator Transformer or Power Company Rectifier Filter Regulator Load We design and built a 12 V dc regulated power supply. In this experiment you use a Zener diode that breaks down at 12 V.

IDC ILoad Iz 12 Volts breakdown voltage ID Forward Characteristics VD Reverse Characteristics Iz ~ I Max

IDC Vinput Rs Rz Voltage Divider Rs ILoad RLoad Iz = IDC ILoad Rz RLoad Iz ID VD ~ I Max

Summary Alternator Transformer or Power Company v t Rectifier Filter Regulator Load

Procedures: I- Design, construct, and test a dc power supply. Week 1 II- Simulate dc power supply. Week 2

Components: • • 18 Volts Transformer Variac Bridge rectifier (use 1 diode) Zener diode (Vbd=12 Vdc, 1 N 4742) 12 Watt, 1000 Ohm, variable resistor 2 Resistor Substitution Boxes 50, 100, and 200 F Fixed Capacitors

1 - Design, construct, test a dc power supply R? C? Peak to peak ripple voltage from the input stage = ? R? C? ILoad = ? R? VLoad =12 V dc Peak to peak ripple voltage at the load = ?

Vmax = 24. 9 v ripple VDC=22. 4 V Vmin=19. 92 0 t 20% ripple t

2 - Simulation of Part I Simulate the dc power supply! Show output wave form at points 1, 2, and 3. Comnpare these waveforms with your experiment. 1 2 3

? 118. 4 V RF=100 Rs=100 VLoad =12 V dc CI=250 u. F Variac CF=100 u. F variable Iz=10. 5 m. A Transformer 18. 0 V

Thank You….