Schering Bridge Group 2 Kelzang Choden Kinley Tshering Tenzin Jamtsho 2 What is Schering Bridge? The Schering bridge is one type of AC bridge, which is used to measure the unknown capacitance, relative permeability, dissipation factor, and dielectric loss of a capacitor. 3 Fig 2.1: Basic AC bridge circuit Fig 2.2: Low-voltage-Schering-bridge 4 Formulas to calculate unknown resistance and capacitance; 5 NI Multisim NI Multisim allows you to design an electronic circuit right on your computer. It is simple and easy to use, making it great for educators and students. NI Multisim includes all kinds of electronic components in its huge database. 6 Problem Satement For a given Schering Bridge in fig. 2.2, the parameters are as follows π 4 = 470 π΄ πΆ4 = 0.01ππΉ πΆ2 = 0.1ππΉ π 3 = 100πΎπ΄ calculate the unknown resistance and capacitance. 7 Solution Formula for calculation of unknown capacitance and resistance: π 4 πΆ1 = πΆ2 , π 3 πΆ4 π1 = π 3 πΆ2 π 4 πΆ1 = πΆ2 = 0.47ππ π 3 πΆ4 π1 = π 3 = 10ππ΄ πΆ2 8 Procedure οΌ Open the multisim simulation software tool. οΌ Model the Schering bridge using the required component by going to the place component after right clicking on the workspace. (or by clicking ctrl+w) οΌ Vary the resistance R4 and C4 to obtain zero current through the multi-meter which has been set to measure current. οΌ These measurements can be used to obtain the values of capacitor and resistor under study using the given formula. 9 Simulation result from using multisim software tool Using multisim Software tool value of R4 and C4 was determined to calculate unknown r1 and C1 10 Thanks! π Any questions?