diff options
Diffstat (limited to '1445/CH8/EX8.2/Ex8_2.sce')
| -rw-r--r-- | 1445/CH8/EX8.2/Ex8_2.sce | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/1445/CH8/EX8.2/Ex8_2.sce b/1445/CH8/EX8.2/Ex8_2.sce index 0046becf5..199e2e038 100644 --- a/1445/CH8/EX8.2/Ex8_2.sce +++ b/1445/CH8/EX8.2/Ex8_2.sce @@ -1,10 +1,10 @@ //CHAPTER 8- DIRECT CURRENT MACHINES //Example 2 +clc; disp("CHAPTER 8"); disp("EXAMPLE 2"); -// 230 V DC shunt machine //VARIABLE INITIALZATION v_t=230; //terminal voltage in Volts r_a=0.5; //armature resistance in Ohms @@ -14,17 +14,17 @@ I_l=40; //line current in Amperes //SOLUTION //for generator -I_f=v_t/r_f; //current through the shunt field winding -I_a=I_l+I_f; //Armature Current -E_a=v_t+(I_a*r_a); //E_a=emf of generator +I_f=v_t/r_f; +I_a=I_l+I_f; +E_a=v_t+(I_a*r_a); //here E_a=emf of generator //for motor I_f=v_t/r_f; I_a=I_l-I_f; -E_b=v_t-(I_a*r_a); //E_b=emf of motor -//ratio of speed as generator to speed as motor +E_b=v_t-(I_a*r_a); //here E_b=emf of motor + ratio=E_a/E_b; //E_a:E_b=(k_a*flux*N_g):(k_a*flux*N_m) =>E_a:E_b=N_g:N_m (as flux is constant) -disp(sprintf("The ratio of speed as a generator to the speed as a motor is %.3f",ratio)); +disp(sprintf("The ratio of speed as a generator to the speed as a motor i.e. N_g:N_m is %f",ratio)); //END |