A Hybrid Electric Vehicle (HEV) can be described using transfer function below. 0.04 T(s)= 82+0.04 As a control engineer you are assigned to analyze and improve the performance of the system by identifying the parameter and solving the problem given below. (NOTE: write NAN if the answer is not available). i) Natural frequency, Wn = ii) Damping ration, = iii) Setting time, T, = %3D

A Hybrid Electric Vehicle (HEV) can be described using transfer function below. 0.04 T(s)= 82+0.04 As a control engineer you are assigned to analyze and improve the performance of the system by identifying the parameter and solving the problem given below. (NOTE: write NAN if the answer is not available). i) Natural frequency, Wn = ii) Damping ration, = iii) Setting time, T, = %3D

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Mcq Q1) What is the benefit of using two pulse transformers to drive the SCR of a single-phase bidirectional AC voltage controller? * - to isolate the SCRs from the source - to isolate the SCRs from getting short - to isolate the load from the source to control the rms output voltage
Question 3: If the currents are in the same direction for a pair of parallel running wires, the currents on the wires are referred as Common Mode currents, ICM. On the other hand, if one of the currents is running in reverse direction (as they should normally do), the currents are referred as Differential Mode currents, IDM. It is essential in analog circuit design to keep track of differential and common mode currents. Referring to the following illustrations, assume that the separation between the wires, d, is 4 mm, the magnetic field observation point, S, is 20 mm away from the right wire, ICM- 5 mA, and IDM= 150 mA.
2. A transformer-coupled class A amplifier drives an 8-ohm speaker through a 4:1 transformer. Using a power supply of Vcc = 36 V, the circuit delivers 3 W to the load. a. Calculate the following: i. Plac) across transformer primary. ii. Vlac). iii. Vjac) at transformer primary. iv. The rms values of load and primary current. b. Draw the circuit diagram of a class A transformer-coupled amplifier using an npn transistor.
a) Given the choice between a MOSFE Open with for a high voltage application. State your selection with reasons. b) The parameters for the power MOSFET in the circuit shown in the Figure 1 are as follows: rise time, t₁ =2 µs; on resistance, Ros(on) = 0.202; duty cycle, D = 0.7; and switching frequency, f = 30 kHz. Determine: i. the power-loss in the on state. ii. the power-loss during the turn-on interval. Vos 100 V ID D S R₁ = 120 Figure 1 c) Draw a clearly labeled diagram of the thermal equivalent circuit of a transistor. d) The maximum junction temperature of a power transistor is T; = 150 °C and the ambient temperature is T₁ = 25 °C. If the thermal impedances are Rjc = 0.4 C/W, Rcs=0.1 °C/W, and RSA = 0.5 °C/W. Calculate, i. the maximum power dissipation. ii. the case temperature.
Part 1) Consider a step down converter with a resistive load. It is supplied by a DC power source of magnitude Vs = 160 V. The switching period is 0.25 ms and the duty cycle k is first set to 0.5. The load is resistive with R=10 Ohms. The critical value of L and the critical value of C are equal to: a. 0.625mH and 0.392uF b. 0.625mH and 0.196uF c. 0.312mH and 0.196uF d. None of these Part2) Now consider the same given but the load is an inductive load with R=10 Ohms and L=10 mH. The switch is ideal. Calculate The RMS load current Io and the RMS converter current Ir are equal to: Select one: a. 5A and 3.54A b. None of these c. 8A and 5.66A d. 12.5A and 8.84A
4: Design a buck converter to produce an output voltage of 18 V across a 10-_ load resistor. The output voltage ripple must not exceed 0.5 percent. The dc supply is 48 V. Design for continuous inductor current. Specify the duty ratio, the switching frequency, the values of the inductor and capacitor, the peak voltage rating of each device, and the rms current in the inductor and capacitor. Assume ideal components.
QUESTION 1 Design a high efficiency 3.3 V, 5A d.c.to d.c. power converter from a 4 to 5.5 Vdc source. The maximum allowable inductor current ripple and output voltage ripple are 0.1A and 20 mV, respectively. Assume a switching frequency of 20 kHz. a) Design a suitable converter power circuit using a MOSFET switch, showing all calculation of inductor and capacitor values and drawing a circuit diagram of the final design including component values. Indicate the peak inverse voltage and forward current rating of any diode required, and the maximum drain- source voltage of the MOSFET. b) On the Schematic diagram, draw the path of the current flow during the ON time and the OFF time. c) Describe the effect of changing the values of the inductor and the capacitor in the circuit. d) What is the effect of switching frequency in the circuit? e) Draw the schematic diagram of a circuit with the output voltage higher than the input voltage.
2. A transformer-coupled class A amplifier drives an 8-ohm speaker through a 4:1 transformer. Using a power supply of Vcc = 36 V, the circuit delivers 3 W to the load. a. Calculate the following: i. Piecj across transformer primary. ii. Vuscd- ii. Vjac) at transformer primary. iv. The rms values of load and primary current. b. Draw the circuit diagram of a class A transformer-coupled amplifier using an npn transistor.
gially Sta 4. Answer the following i. Define Phase Margin and Gain Margin for continuous and discrete systems. Discuss similarities and differences for (i). ii.
Draw the AC equivalent circuit and find Zi, Zo, Av, Ai (ignore the effect of To). Show all the necessary derivations and label all the parameters properly.
An ideal boost converter is required to have a constant output voltage of 12 V at 24 W load.The input voltage varies from 2.7 to 4.5 V (as in a battery cell). Select a switching frequency of100 kHz. The value of the inductance in the boost converter is 2.2 uH. Determine:(a) The range of duty cycle that the converter will operate with (hint: mode?), and(b) The minimum value of the output capacitance such that the pk-to-pk load voltage rippleis less than 2%.
7. For certain applications of power supply a power semiconductor switch is required to operate with 400V, 200A load and switching frequency of 100 kHz .The power switching device suitable for this task is: (a) GTO (b) IGBT (c) MOSFT (d) BJT (e) Triac 8. The latching current of an SCR used in a phase-control circuit, comprising an inductive load of R= 10 ohms in series with L= 0.1H, is 10mA.The supply voltage is 325 sin 314 t volts. Obtain the minimum gate pulse width required for reliable triggering of the SCR if it is gated at an angle of 45° in every positive half-cycle. The load current i(t) for the circuit is given by : i(t)=[Vm/√R² + (ot)2] [sin (314t+45°-p) - sin( 45°-p)exp(-Rt/L)] where Vm= 325 V, -314, tan q = 3.14 (ANS: At> 4.35 µS) 9. The gate-cathode junction of the SCR in problem (8) above has a voltage - current characteristic which is a straight line passing through the origin with a gradient of 3000 volts/amp, calculate the minimum required gate source resistance given…