blob: ff969b20e442c4eaf07f57536cf21200842ca257 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
//===========================================================================
//chapter 6 example 2
clc;clear all;
//variable declaration
Rm = 1; //instrument resistance in Ω
Rse = 4999; //series resistance in Ω
V = 250; //full-scale deflection voltage in V
Rs = 4999; //Shunt resistance in Ω(Rs =1/(499))
I1 = 50; //full-scale defelction current in A
//calculations
Rs1 = 1/(Rs);
Im = V/(Rm+Rse); //full-scale deflection current in A
I = Im*(1+(Rm/Rs1)); //current in A
N = I1/(Im);
Rsh = Rm/(N-1); //shunt resistance in Ω
//result
mprintf("full-scale defelction current in Im = %3.2f A",Im);
mprintf("\ncurrent range of instrument when used as an ammeter with coil connected across shunt is I = %3.2f A",I);
mprintf("\nShunt resistance for the instrument to give a full-scale deflection of 50A is Rsh = %3.4f Ω",Rsh);
|
