ee_285_Assignment_9

a) It is important to manage heat dissipation for power control components such as Thyristor. Draw a typical heatsink for a semiconductor power device and the equivalent heat schematic. b) Explain the rate of change of voltage of a thyristor in relation to reverse-biased. c) Draw and explain how a 3-phase fully controlled converter operates.

Commercially available strain gages, typically, have nominal resistance of either 120 or 350 Ohm. Discuss the advantages and disadvantages of each type in terms of measurement accuracy/precision and sensitivity.

Discuss the significance of integrated circuits (ICs) in the development of microchips and their impact on miniaturization and performance.

3.16 A three-phase, full-wave half-controlled rectifier bridge circuit is operating at a delay angle a = 67° when supplying full power. The per-phase inductance of the coupled transformer is 2 mH. The input voltage has an rms magnitude of 230 V per phase at 50 Hz. The load current in the d.c. side is 15 A at 200 V. It is required to: (a) Obtain the drop in the d.c. voltage due to current overlap. (b) Calculate the rms secondary voltage of the transformer. (c) Calculate the overlap angle. (d) Obtain the recovery angle while the converter in operating in the inversion mode with 15 A, 200 V d.c. input. (e) Obtain the firing angle for the conditions in (d). [Ans: (a) 4.5 V, (b) 450 V, (c) 1.06°, (d) 67.14°, (e) 111.8°]

3.16 A three-phase, full-wave half-controlled rectifier bridge circuit is operating at a delay angle a = 67° when supplying full power. The per-phase inductance of the coupled transformer is 2 mH. The input voltage has an rms magnitude of 230 V per phase at 50 Hz. The load current in the d.c. side is 15 A at 200 V. It is required to: (a) Obtain the drop in the d.c. voltage due to current overlap.

Industrial electronics -Differentiate line and load regulation. -Explain how a voltage regulator maintain a constant dc output voltage. Your answer

What are ASICs (Application-Specific Integrated Circuits), and in what scenarios are they preferred over general-purpose microchips?

Outline a method for solving a circuit that contains a single nonlinear element plus resistors, dc voltage sources, and dc current sources, given the volt–ampere characteristic of the nonlinear device.

What are the challenges and opportunities in designing power electronic circuits for high power applications in terms of efficiency, reliability, and cost-effectiveness?

Explain the role of integrated circuits (ICs) in the functionality of microchips. How are these circuits designed and fabricated?

Discuss the challenges and strategies involved in microchip power management, especially in battery-powered devices. How does dynamic voltage scaling (DVS) work?