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Unformatted text preview: EE210 - Electric Circuit I T T T r r r a a a n n n s s s i i i e e e n n n t t t A A A n n n a a a l l l y y y s s s i i i s s s u u u s s s i i i n n n g g g P P P S S S p p p i i i c c c e e e EE Dept. 2008-12-28 J J J o o o r r r d d d a a a n n n U U U n n n i i i v v v e e e r r r s s s i i i t t t y y y o o o f f f S S S c c c i i i e e e n n n c c c e e e a a a n n n d d d T T T e e e c c c h h h n n n o o o l l l o o o g g g y y y 1/8 Transient Analysis using PSPICE The new command her is ‘.TRAN’ which has several forms: (a) .tran[/op] print_step end_time [no_print_time [step_ceiling]] [UIC] If we are not interested in values for .print or .plot statements then we use (b) .tran end_time end_time [UIC] If we want to force a step_ceiling then we must specify no_print_time (0 here) (c) .tran end_time end_time 0 step_ceiling [UIC] Step_ceiling default=end_time/50 /op to find the (bias-point) operating point (similar to .OP command) Co n s id er a series RLC circu it with DC vo ltag e of 10 v o lts as d escrib ed in th e fo llowin g .CIR f i l e s - + 10 V 1 k Ω 1 H . 5 μ RLC.transient.m4 Transient in RLC circuit *RLC.Transient.cir V10 1 0 dc 10V R12 1 2 8k; 1k, 2k, 4k, 8k L23 2 3 1H ic=0 C30 3 0 0.5u ic=0 .tran/op 20m 20m 0 0.01m UIC; <final time> <final time> <print delay> <max time step> .probe .end The above .tran command will cause PSpice to carry out circuit analysis from t=0 to 20 milliseconds, using the initial conditions (UIC) on inductors and capacitors which are given elsewhere. The first 20m is the print step , and the second 20m is the final time for simulation and 0.01m is the step ceiling, i.e. simulation time steps should not exceed 0.01milli seconds. The 0 means the no print time , i.e. PSpice ignores results from time 0 to no print time and in our example all results will be collected and nothing omitted since no print time is zero....
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This note was uploaded on 03/25/2011 for the course ELECTRICAL 101 taught by Professor Unknown during the Spring '11 term at Jordan University of Science & Tech.
- Spring '11