COMPUTERIZED SURVEY OF CURRENT INTENSITY IN SERIES RLC CIRCUIT VARYING POWER FREQUENCY " Integration of InnoVativE MeThodologies for ELectrical Measurements VET-ELM Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

WORKING GROUP Prof. Salvatore Aviani dirigente scolastico Prof. Biagio De Rosa vicepreside Prof. Mariarosaria Damato inglese Prof. Vincenzo DAntonio elettrotecnica/sistemi Prof. Lomonte Paolo TDP/Impianti elettrici Prof. Roberto Scognamiglio elettronica Prof. Vincenzo Veneruso elettrotecnica/sistemi Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

INDEX INTRODUCTION EDUCATIONAL OBJECTIVES OF THE MEASURE PREREQUISITES DESCRIPTION OF THE EXERCISE COMPONENTS AND INSTRUMENTS Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

INDEX TEST RUN THEORETICAL FORMULAS COMPUTERIZED DEVELOPMENT OF THE MEASUREMENT RESULTS SIMULATION WITH SOFTWARE NATIONAL INSTRUMENT MULTISIM EVALUATION GRID Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

INTRODUCTION Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

INTRODUCTION IN ITALY THE TEACHING OF "ELECTRICAL MEASUREMENT" AS PART OF THE CURRICULUM OF STUDIES " INDUSTRIAL EXPERT - ELECTRICAL AND AUTOMATION SPECIALIZAZTION" IS NO LONGER AN AUTONOMUS SUBJECT. THE SUBJECT S CONTENT IS PART OF ELECTRICAL ENGINEERING INCLUDING LABORATORY HOURS DURING WHICH STUDENTS ARE TESTED THROUGH EXERCISES. I.T.I.S. A. Volta-Napoli

INTRODUCTION IN PARTICULAR THE SUBJECT "AUTOMATIC ELECTRIC SYSTEMS", HAS BEEN INTRODUCED, WHICH MOREOVER, HAS THE TASK OF CREATING A SYNTHESIS BETWEEN THE ACQUIRED KNOWLEDGE DURING THE ENTIRE COURSE OF STUDY, INCLUDING A CONTINUOUS LINK WITH OTHER DISCIPLINES, FIRST OF ALL ELECTRICAL AND ELECTRONICS ENGINEERING COMPUTING. I.T.I.S. A. Volta-Napoli

INTRODUCTION ON THE STRENGTH OF THESE INNOVATIONS, EVEN "ELECTRICAL MEASUREMENT TEACHING HAS EXPERIENCED AN UPGRADE, INTRODUCING ELEMENTS OF ELECTRONICS AND COMPUTERS. HERE BELOW YOU CAN SEE AN EXAMPLE OF A "MEASURES EXERCISE " I.T.I.S. A. Volta-Napoli

EDUCATIONAL OBJECTIVES OF THE MEASURE Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

EDUCATIONAL OBJECTIVES OF THE MEASURE AT THE END OF THE EXERCISE STUDENTS WILL: 1.GAIN AWARENESS OF THE CONDUCT OF SIMPLE AC CIRCUITS AND OF THE PHENOMENON OF RESONANCE 2.ACQUIRE THE ABILITY TO INTEGRATE KNOWLEDGE OF THE FOLLOWING DISCIPLINES: ELECTRIC MEASURES ELECTRONICS AUTOMATIC SYSTEMS I.T.I.S. A. Volta-Napoli

PREREQUISITES Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

PREREQUISITES PUPILS SHOULD KNOW: BASIC PRINCIPLES OF ALTERNATING CURRENT; BASIC PRINCIPLES OF ELECTRICAL MEASUREMENT (MEASURES); SOFTWARE USUALLY USED IN A PC; SOFTWARE MICROSOFT EXCEL. I.T.I.S. A. Volta-Napoli

DESCRIPTION OF THE EXERCISE Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

DESCRIPTION OF THE EXERCISE THE EXERCISE PLANS TO MAKE A SERIES OF CURRENT MEASUREMENT IN ORDER TO DESCRIBE THE CONDUCT OF A A.C. CIRCUIT WHEN POWER FREQUENCY CHANGES. THE RESULTS ARE INPUTTED ON A PERSONAL COMPUTER, AND TRASFERRED THROUGH FILE TO THE SOFTWARE EXCEL FOR GRAPHIC AND ANALYTICAL PROCESSING OF DATA. I.T.I.S. A. Volta-Napoli

DESCRIPTION OF THE EXERCISE STEP OF WORK: 1 - DIRECT MEASUREMENT OF CURRENT IN A SERIES RLC CIRCUIT POWERED WITH VARIABLE FREQUENCY 2 - TRANSFER OF DIGITAL DATA MEASURED BY A DIGITAL MULTIMETRO ON A PERSONAL COMPUTER 3 - ANALYSIS OF THE BEHAVIOUR OF COMPONENTS AND CIRCUIT THROUGH AN EXCEL SPREADSHEET. I.T.I.S. A. Volta-Napoli

DESCRIPTION OF THE EXERCISE THE FOLLOWING FIGURE SHOWS THE SETUP CIRCUIT. I.T.I.S. A. Volta-Napoli Figure 1

COMPONENTS AND INSTRUMENTS Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

COMPONENTS AND INSTRUMENTS A FUNCTION GENERATOR WITH VARIABLE FREQUENCY FROM 10 A Hz A RESISTOR: 1 kOhm AN INDUCTANCE: 100 mH A CAPACITOR: 330 nF DIGITAL MULTIMETER DM3051 RIGOLI COMPLETE WITH USB CONNECTION AND SOFTWARE INTERFACE PERSONAL COMPUTER SOFTWARE MICROSOFT EXCEL I.T.I.S. A. Volta-Napoli

COMPONENTS AND INSTRUMENTS DIGITAL MULTIMETER FEATURES: HIGH PRECISION MULTIFUNCTIONAL SUITABLE FOR AUTOMATIC DATA ACQUISITION ACCESSORY WITH N. 2 SOFTWARE INTERFACE WITH PC (ULTRASENSOR AND ULTRALOGGER) I.T.I.S. A. Volta-Napoli

COMPONENTS AND INSTRUMENTS DIGITAL MULTIMETER PICTURES I.T.I.S. A. Volta-Napoli

COMPONENTS AND INSTRUMENTS DIGITAL MULTIMETER: DATASHEET MULTIMETER I.T.I.S. A. Volta-Napoli

COMPONENTS AND INSTRUMENTS DIMENSIONING OF CIRCUIT COMPONENTS : COMPONENTS HAVE BEEN CHOSEN IN ORDER TO OBTAIN A RESONANCE FREQUENCY OF APPROXIMATELY 870 Hz AND TO LIMIT THE CIRCUIT CURRENT TO A VALUE NOT EXCEEDING 5 mA I.T.I.S. A. Volta-Napoli

TEST RUN Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

TEST RUN THE CIRCUIT WILL POWERED BY A SINUSOIDAL SIGNAL VARIABLE FREQUENCY FROM 10 TO Hz N. 25 MEASURES WILL BE MADE FOR VALUES OF GROWING FREQUENCY. BY INCREASING THE FREQUENCY THE CURRENTE VALUE WILL INCREASE ACHIEVING ITS MAXIMUM VALUE AT THE RESONANCE RATE. AFTER REACHING ITS RESONANCE RATE ITS VALUE WILL DECREASE. I.T.I.S. A. Volta-Napoli

TEST RUN I.T.I.S. A. Volta-Napoli

THEORETICAL FORMULA Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

THEORETICAL FORMULA V = Z I Z = R + j (XL – XC) XL = 2*π*f*L XC = 1/(2*π*C ) fr = 1/(2π*L*C ) 1/2 I = V / Z I.T.I.S. A. Volta-Napoli

COMPUTERIZED DEVELOPMENT OF THE MEASUREMENTS RESULTS Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

COMPUTERIZED DEVELOPMENT OF THE MEASUREMENTS RESULTS THE RESULTS OF THE MEASUREMENTS ARE TRANSFERRED TO THE SOFTWARE TOOL KIT. ONCE ACQUIRED THE RESULTS ON AN INTERCHANGE FILE, DATA ARE INSERTED INTO AN EXCEL FILE AND PROPERLY PROCESSED I.T.I.S. A. Volta-Napoli

COMPUTERIZED DEVELOPMENT OF THE MEASUREMENTS RESULTS I.T.I.S. A. Volta-Napoli

COMPUTERIZED DEVELOPMENT OF THE MEASUREMENTS RESULTS I.T.I.S. A. Volta-Napoli

SIMULATION WITH SOFTWARE NATIONAL INSTRUMENT MULTISIM Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

SIMULATION WITH SOFTWARE NATIONAL INSTRUMENT MULTISIM FOR EDUCATIONAL USE, A MULTISIM SOFTWARE SIMULATION WAS MADE, BEFORE THE LAB TESTS. I.T.I.S. A. Volta-Napoli

SIMULATION SOFTWARE WITH NATIONAL INSTRUMENT MULTISIM ON THE FOLLOWING PAGES WILL BE SHOWN : 1 – THE CIRCUIT DIAGRAM 2 – PERFORMANCE CHART WITH THE FUCTION OF CURRENT INTENSITY - FREQUENCY 3 - SURVEY ON THE CHART OF THE FREQUENCY OF RESONANCE I.T.I.S. A. Volta-Napoli

SIMULATION SOFTWARE WITH NATIONAL INSTRUMENT MULTISIM THE CIRCUIT DIAGRAM I.T.I.S. A. Volta-Napoli

SIMULATION SOFTWARE WITH NATIONAL INSTRUMENT MULTISIM PERFORMANCE CHART WITH THE FUNCTION OF CURRENT INTENSITY/ FREQUENCY (BODE) I.T.I.S. A. Volta-Napoli

SIMULATION SOFTWARE WITH NATIONAL INSTRUMENT MULTISIM I.T.I.S. A. Volta-Napoli SURVEY ON THE CHART OF THE FREQUENCY OF RESONANCE

EVALUATION GRID Leonardo da Vinci PARTNERSHIPS DG Education and Culture ISTITUTO TECNICO INDUSTRIALE STATALE ALESSANDRO VOLTA NAPOLI

EVALUATION GRID I.T.I.S. A. Volta-Napoli

EVALUATION GRID I.T.I.S. A. Volta-Napoli

EVALUATION GRID I.T.I.S. A. Volta-Napoli