SPICE for Power Electronics and Electric Power 2nd. Edition by Muhammad H. Rashid, Hasan M. Rashid | 9780849334184 | 849334187 | Holooly

Electric Power, Power Electronic

SPICE for Power Electronics and Electric Power

84 SOLVED PROBLEMS

Question: 15.4

PROVIDING DC PATHS TO A PASSIVE FILTER A passive filter is shown in Figure 15.14. The output is taken from node 9. Plot the magnitude and phase of the output voltage separately against the frequency. The frequency should be varied from 100 Hz to 10 kHz in steps of one decade and 101 points per ...

Verified Answer:

The nodes between

C_{1}

and

...

Question: 15.3

TRANSIENT RESPONSE OF A SINGLE-PHASE FULL-BRIDGE INVERTER WITH VOLTAGE-CONTROLLED SWITCHES A single-phase bridge-resonant inverter is shown in Figure 15.8. The transistors and diodes can be considered as switches whose on-state resistance is 10 mΩ and whose on-state voltage is 0.2 V. Plot the ...

Verified Answer:

When transistors

Q_{1}

and

Q...

Question: 15.2

TRANSFER FUNCTION ANALYSIS OF A CIRCUIT WITH A NEGATIVE RESISTOR A circuit with negative components is shown in Figure 15.5. The input voltage is Vin = 120 V (peak), 60 Hz. Use PSpice to calculate the currents I(R1), I(R2), and I(R3) and the voltage V(2). ...

Verified Answer:

The PSpice schematic with a negative resistance is...

Question: 15.1

FINDING THE HYSTERESIS CHARACTERISTIC OF AN EMITTER-COUPLED CIRCUIT An emitter-coupled Schmitt trigger circuit is shown in Figure 15.1(a). Plot the hysteresis characteristics of the circuit from the results of transient analysis. The input voltage, which is varied slowly from 1.5 to 3.5 V and from ...

Verified Answer:

The input voltage is varied very slowly from 1.5 t...

Question: 14.4

FINDING THE TORQUE–SPEED CHARACTERISTIC OF AN INDUCTION MOTOR FOR VARYING ROTOR RESISTANCE Repeat Example 14.3 for rotor resistance Rr = 0.1 Ω, 0.2 Ω, 0.3 Ω, and 0.42 Ω. The slip is kept fixed at s = 0.1. ...

Verified Answer:

The PSpice schematic is similar to that as shown i...

Question: 14.3

FINDING THE TORQUE–SPEED CHARACTERISTIC OF AN INDUCTION MOTOR FOR VARYING SLIP The equivalent circuit of an induction motor is shown in Figure 14.8. Use PSpice to plot the torque developed against frequency for slip s = 0.1, 0.25, 0.5, and 0.75. The supply frequency is to be varied from 0.1 to 100 ...

Verified Answer:

The effective resistance due to slip is

R_{...

Question: 14.2

FINDING THE PERFORMANCE OF A SEPARATELY EXCITED MOTOR WITH A STEP CHANGE IN LOAD TORQUE CONTROLLED BY A DC–DC CONVERTER Use PSpice to plot the transient response of the motor speed of Example 14.1 if the load torque TL is subjected to a step change as shown in Figure 14.5. ...

Verified Answer:

The PSpice schematic is similar to that shown in F...

Question: 13.10

FINDING THE CLOSED-LOOP RESPONSE OF THE OUTPUT VOLTAGE FOR THE DIODE RECTIFIER–BOOST CONVERTER A diode rectifier followed by a boost converter is shown in Figure 13.36. The input voltage is vs = 170 sin(120πt). The circuit is operated closed loop, so that the output voltage is Vo = 220 ± 0.2 V, and ...

Verified Answer:

The peak input voltage is

V_{m}

= 1...

Question: 13.3

FINDING THE PERFORMANCE OF A DIFFERENTIATOR A practical differentiator circuit is shown in Figure 13.14(a). The input voltage is shown in Figure 13.14(b). Use PSpice to plot the transient response of output voltage for a duration of 0 to 4 msec in steps of 50 μsec. ...

Verified Answer:

The PSpice schematic is shown in Figure 13.15(a) w...

Question: 13.2

FINDING THE PERFORMANCE OF AN OP-AMP INTEGRATOR An op-amp integrator circuit is shown in Figure 13.11(a). The input voltage is shown in Figure 13.11(b). Use PSpice to plot the transient response of the output voltage for a duration of 0 to 4 msec in steps of 50 μsec. ...

Verified Answer:

The PSpice schematic shown in Figure 13.12(a) with...

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