ES Lab Report 5.docx

# ES Lab Report 5.docx - 1.0 INTRODUCTION . .As ,...

• Lab Report
• 9

This preview shows pages 1–5. Sign up to view the full content.

1.0 INTRODUCTION Transformers provide a simple means of changing an AC voltage  from one level to another. They may step up the voltage for  transmission of energy or step down the voltage for actual usage. As  electronic circuits need DC voltages to operate, rectifying circuits are  used to convert AC voltages to DC voltages, usually at voltages much higher than mains supply of 240V, 50Hz. For this laboratory, the  effects of internal factors within a transformer will be explored and  compared to ideal results. 2.0 SUMMARY OF RESULTS Transformer is a device used to change the voltages. The power in is  equal to the power in the transformer. And therefore the formula  I p *V = I s *V s . Also, the ratio of the number of turns (primary &  secondary)  is equal to the ratio of the input voltage over the output  voltage.

This preview has intentionally blurred sections. Sign up to view the full version.

3.0 CIRCUITS Circuit      1 Circuit      2
Circuit      3 Circuit      4

This preview has intentionally blurred sections. Sign up to view the full version.

4.0 RESULTS 4.1 TRANSFORMER TE S T NOLOAD Rated Voltage240 V N O M I NA L M E ASU R E D TURNS R A T I O I N P U T V O LT A G E I N P U T O U T P U T V P I P P IN V 21 V 22 V P /V 21 V P /V 22 50 V 51.3 V 0.0 mA - 2.68 V 5.34 V 19.05 9.52 100 V 99.3 V 0.0 mA - 5.16 V 10.38 V 19.42 9.68 150 V 149 V 0.0 mA - 7.92 V 15.82 V 19.35 9.68 200 V 197 V 465.0 mA - 10.28 V 20.52 V 18.87 9.50 240 V 239 V 670.0 mA 8.7 W 12.56 V 25.04 V 19.14 9.56 250 V 247 V 279.0 mA - 12.97 V 25.90 V 19.14 9.59 WITH LOAD On 12V Winding V 21 I N P U T V O LT A G E I N P U T C U RR E N T I N P U T P O W E R OUTPUT VOLTAGE Measured OUTPUT CURRENT C a lc u l a t e d OUTPUT POWER C a lc u l a t e d EFF I C I E N C Y % C a lc u l a t e d 240 V 103 mA 14.5 W 12.52 V 368 A 4.61 W 31.8% R = 34.2Ω 4.2 HALF WAVE R E C T I F I C A T I O N MEASUREMENT WITH DS O Q UAN T I T Y M E ASU R E D C A L C U L A TE D I N P U T S - - V IN (RMS) 12.4 V
This is the end of the preview. Sign up to access the rest of the document.
• One '14

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern