Need a solu 8. Four 32-channel TDM streams are multiplexed to form one input stream of an 8-streamTS switch. Determine the cost of the configuration including that of the multiplexers.11Lif the

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Answered: 8. Four 32-channel TDM streams are…

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter17: Commercial And Industrial Air-conditioning Control Systems

Section: Chapter Questions

Problem 25RQ

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Answer number 5
a) What is the advantage of increasing the switching frequency in switching converters (Buck, Boost etc.)and causes disadvantages to arise? b) General characteristics of IGBT and MOSFET, such as the current, voltage and switching frequency they can be producedCompare in terms of values. c) Output current and voltage ripples for a Buck-Boost type power converterWhat variables do (ripples) depend on? Explain.
*2. What are the main causes of turn-on and turn-off switching times of a BJT? What are the main causes of turn-on and turn-off switching times of a MOSFET? What are the main causes of turn-on and turn-off switching times of an IGBT? [Hint: A BJT is a current-controlled device, whereas a MOSFET is a voltage-controlled device].
During the turn-on and turn-off of a power transistor,the current-time and voltage-time relationshipsare as shown in the adjacent figure. Observe thewaveforms and calculate,1. The OFF-state power dissipation (static);2. The switch ON-state power dissipation(static);3. The average switching loss for the OFFtransition (dynamic);4. The average switching loss for the ONtransition (dynamic);Assume a switching frequency of 1kHz with Vx = 422V
3. Briefly explain the function of each terminal for Bipolar Junction Transistor. 4. Named the three BJT modes of operations? Explain each mode of operation. 5. Explain the Basic operation of a BJT. How is a BJT become an amplifier or a switch?
Q2 EMI is a very important aspect to be considered while designing a switching power supply. Discuss with examples what considerations at the circuit level and PCB level design to avoid failing EMC test. Shed some light also on the EMC test. а. What is EMI and EMC and how to conduct the test What considerations to be taken into account while designing a PCB for a switching power supply with examples b.
During turn on and turn off of a power transistor, the current-time and voltage -time relationships are as shown in the adjacent figure. Calculate 40) the show OFF state power dissipation(static); 41) the switch ON state power dissipation (static); 42) the average switching loss for the OFF transition (dynamic); 43) the average switching loss for the ON transition (dynamic). Assume a switching frequency of 2kHZ with 423
Sketch a hierarchical TDM multiplexer system to multiplex 5 channels together. Each individual multiplexer can combine, at most 3 channels.
During turn-on and turn-off of a power transistor, thecurrent-time and voltage-time relationships are asshown in the adjacent figure. Observe the waveformsand calculate,40) the OFF-state power dissipation (static);41) the switch ON-state power dissipation(static);42) the average switching loss for the OFFtransition (dynamic);43) the average switching loss for the ONtransition (dynamic);Assume a switching frequency of 2kHz with 397V as specified in Appendix A.
b) i. ii. Comparing Silicon (Si), Silicon Carbide (SiC) and Gallium Nitride (GaN) power transistors answer the following: Which one is expected to have shortest turn-on, turn- off transition times and why? Which one would be your preferred device for operating at high temperature and high power when moderate switching frequency is desired?
Please answer all three subparts with brief explain
One characteristic of the emitter follower is ______. A. low resistance output B. low current amplification C. high voltage amplification

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8. Four 32-channel TDM streams are multiplexed to form one input stream of an 8-stream TS switch. Determine the cost of the configuration including that of the multiplexers. 11 Lif the