Voltage Source Pulse - Analog Primitives - Engineering Assignment Help

Assignment Task :

Answer all questions asked.

• Create the circuit shown in Fig. 1. To place Vclock look in Components/Analog Primitives/Waveform Sources/Vsource and create Vclock as a pulse voltage source pulse with V1 = 0, V2 = 5, TD = 0, TR = 10n, TF = 10n, PW = 5u, PER = 10u. 

• To place the core (K1 in Fig. 1), look in Components/Analog Primitives/Passive Components/K. Use the screen shot in Fig. 2 to set the values of K. Parameters A, C, K, and MS set the hysteresis loop shape (width, slope and saturation level). 

• Note, entering 20 for L1 sets the number of turns it has, when L1 is coupled to the K (core), component. 

• Create S1 as a voltage controlled switch (look under Components/ Analog Primitives/ Special Purpose/ S(V-switch). 

• For S1 use the SBREAK model and set ROFF = 1e6, RON = 0.4, VOFF = 0.0, VON = 5.0. 

i. Use the L1 voltage and current waveform results from question 1 to calculate the inductance of L1, between 19.9 ms and 20 ms. Show your calculations.

ii. Calculate the peak B-field that results from operation under the conditions in question 1, between 19.9 ms and 20 ms. Show your calculations

iii. Calculate the peak B-field that occurs at start up, between 0 ms and 20 ms. 

Show your calculations. 3. 

i. Calculate the saturation flux density (saturation B-field), for the core material used in the simulation circuit (hint, use MS from Fig. 2). State whether, or not, the core may be saturating at start-up.

ii. Use the same conditions as used for question 1, but change the core gap to 0.003 cm. Plot B(L1) vs. time and plot H(L1) vs. B(L1). Use the results to explain why changing the core gap changes the nature of the current waveform though L1, in terms of its shape. 

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