Power Electronics Problem Set 1b

This video tutorial covers two main problems related to converter efficiency and switching losses. The first problem involves analyzing the cost-effectiveness of a new converter with higher efficiency compared to an existing one. The second problem focuses on calculating energy losses during switching transitions in semiconductor devices. The tutorial provides detailed calculations and encourages viewers to engage with the material by attempting to solve the problems before reviewing the solutions.

What is the efficiency of the first converter discussed in the video?

• 76%

• 86%

• 96.8%

• 100%

How much does the first converter cost?

• £150

• £100

• £50

• £200

What is the annual energy loss cost for the first converter?

• £142.6

• £100

• £285.2

• £200

What is the efficiency of the new converter offered?

• 96.8%

• 90%

• 100%

• 86%

How long does it take for the new converter to pay back its cost according to the analysis?

• 10 years

• 5 years

• 1 year

• 2 years

What is the main focus of problem #5 introduced in the video?

• Thermal management

• Cost analysis

• Energy efficiency

• Switching transition

During the switching transition, what is the initial state of the current?

• Fluctuating

• Constant

• Maximum

• Zero

What is the correct formula for calculating energy loss during the switching transition?

• IV(T1 - T2)

• IV/2(T1 - T2)

• IV/2(T1 + T2)

• IV(T1 + T2)

What is the purpose of calculating the energy loss during the switching transition?

• To improve efficiency

• To reduce power output

• To determine cost savings

• To decide on heat sink necessity

What is the significance of understanding the basics before using software for calculations?

• To save time

• To ensure accuracy

• To reduce costs

• To avoid errors