ecelab2done - 1 Introduction The purpose of this experiment...

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1. Introduction: The purpose of this experiment was to learn how to put together a transformer safely by soldering. After that the experiment was mainly about building and testing half, full and bridge rectifier on the transformer and also understanding the output characteristics of the transformer by using DMM and also a Digital Oscilloscope. 2. Background information: V = I × R Equation Ohm's Law Equation I S = Saturation current V T = Thermal Voltage (25mV) I D = I S × ( e ( V D nV T ) - 1) Equation Diode Equation [1] Figure i-v Characteristic of Diode [1] Characteristic Value + unit Convert any RMS values to V P , then V PP Primary Voltage 115Vrms V P =162.61V V PP =325.22V Frequency 60Hz Secondary Voltage 18Vrms V P = 25.452V V PP =50.904V Secondary Current Limit 1.5A
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Calculate Power Limit (secondary V*I limit) 38.178W Calculate turn ratio (N P /N S ) 6.389 Equation Basic Transformer Eq. [3] Figure Step down Transformer [3] Equation PIV Equations for Bridge and Full Wave Rectifiers 3. Methods and Materials: Equipment Components (Quantity, Type & Symbol Name) 115V RMS – 18V RMS Center Tapped Transformer TX1 (1) Series Silicon Diode (1N4002), D1-D4 Keithley Multimeter - Model 175 (1) 16 kΩ Resistor, R1 Breadboard (1) 1 Ω Resistor, RL PSPICE (1) 10 Ω Resistor, R2 Digital Oscilloscope (2) Capacitors C1-C2 Table Equipment & Components List 4. Experimental Procedures: Part4.1: Prelab In this part of the lab, it was asked to read tutorial #2 on lab website in order to understand how to simulate circuits in PSPICE. Also the Table 1 was filled in with the characteristics of the transformer (Center Tapped Transformer TX1). After finishing the 2 Table Characteristics of the Transformer
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table about the transformer, it was time to start to do the circuits that were going to be tested in lab by using PSPICE. Each PSPICE on the manual was build and the output for all three different types of rectifiers were observed. The figures below are the ones that were built in the PSPICE; Figure Half-Wave Rectifier Figure Full-Wave Rectifier Figure Bridge-Rectifier Also apart from that a voltage doubler circuit was built with the help of capacitors, resistors and rectifiers. The figure below shows the circuit that was build and the output of it was observed with the help of PSPICE; Figure Voltage Doubler Circuit with a non-center tapped Transformer 3
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Part4.2: Determining the Turn Ratio of the Transformer
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