Ee 472l Expt 2.Docx

EE 472 Laboratory

Experiment No._2_

Separately Excited DC Generator

Performed by : Duldulao, Caryl Xyra L. Date Performed : November 27, 2012 Date Submitted : December 4, 2012

Engr. Timoteo V. Limsiaco
Laboratory Instructor

I. MATERIALS:

* Digital Wattmeter (DWM) * Digital Multi-meter (DMM) * Variac * Plastic Coupling * 10 Alligator Clips (Big Wire) * 10 Banana Plug (Big Wire) * 1 Banana Plug with Flat Plug Combination

II. WIRING DIAGRAM:

Circuit Diagram of the Connections

Actual Wiring of the Shunt Generator with Connected Loads

III. DATA AND RESULTS:

VS | Loads | VFL | IA | IF | IL | Eg | VnL | %VREG | 30 V | 1 | 40.2 | 1.3 | 0.13 | 1.17 | 1.69 | 40 | 0.74% | 40 V | 2 | 48.2 | 3.1 | 0.18 | 2.92 | 4.03 | 40 | 20.398% | 50 V | 3 | 55.5 | 4.6 | 0.22 | 4.38 | 5.98 | 40 | 27.9% | 60 V | 4 | 59.7 | 6.31 | 0.27 | 6.04 | 8.203 | 40 | 32.998% | 70 V | 5 | 60.6 | 8.22 | 0.31 | 7.91 | 10.686 | 40 | 33.99% |

PDEV | PDEL | | RA | 1.3 Ω | 52.39 W | 1.977 W | | Rf | 212 Ω | 149.42 W | 11.767 W | | RSE | 0.6 Ω | 255.3 W | 26.192W | | | | 367.707 W | 49.456W | | | | 448.132 W | 84.526 W | | | |

CALCULATIONS:

Eg=IaRa

Ea1=1.31.3=1.69V

Ea2=3.11.3=4.03V

Ea3=4.61.3=5.98V

Ea4=6.311.3=8.203V

Ea5=8.221.3=10.686V
PDEV=EaIa

PDEV1=1.69V1.3=2.197W

PDEV2=4.03V3.1=12.493W

PDEV3=7.36V4.6=33.856W

PDEV4=8.203V6.31=51.76W

PDEV5=10.686V8.22=87.84W

PDEL=EaIL

PDEL1=1.69V1.17=1.97W

PDEL2=4.03V2.92=11.767W

PDEL3=5.98V4.38=32.24W

PDEL4=8.203V6.04=49.55W

PDEL5=10.686V7.91=84.53W

%VREG=VnL-VFLVFLx 100%

%VREG1=40-40.340.3x 100%=0.74%

%VREG1=40-48.248.2x 100%=17.01%

%VREG1=40-55.555.5x 100%=27.9.%

%VREG4=86.1-59.759.7x 100%=32.998%

%VREG5=86.1-60.660.6x 100%=33.99%

IV. OBSERVATIONS: * We created the circuit according to the circuit diagram instructed to us to do.

* Before we