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National Bird Day: Why Birds Matter to Us

National Bird Day is celebrated every year on 5 January . This day is observed to spread awareness about birds, their importance in nature, and the need to protect them. Birds are beautiful living beings and play a very important role in keeping our environment healthy. Origin of National Bird Day National Bird Day was first celebrated in the year 2002 . It was started by bird lovers and environmental groups to protect birds from dangers like deforestation, pollution, and illegal hunting. The main aim of this day is to teach people, especially students, why birds are important and how we can help save them. Why Is National Bird Day Celebrated Every Year? National Bird Day is celebrated every year because many bird species are disappearing due to human activities. Cutting trees, using plastic, pollution, and climate change are harming birds and their homes. This day reminds us that: Birds need protection Nature should be respected Everyone has a responsibil...
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Introduction of power electronics

Introduction of power electronics

  • Power electronics belongs partly to power engineers and partly to electronics engineers. It means it is the combination of power engineering and electronics engineering.
  • Power engineering is mainly concerned with generation, transmission, distribution and utilization of electric energy at high efficiency.
  • The simple engineering is guided by distortion-less production, transmission and reception of data and signals of very low power level of the order of a few watts, or milliwatts without much consideration of the efficiency.
  • Power electronics is also known as industrial electronics.
  • The apparatus associated with power engineering is based mainly on electromagnetic principles, whereas in electronics engineering they are based on physical phenomenon in vacuum, gases/vapours and semiconductors.
  • This subject concerns the application of electronic-principles into situations that are rated at power levels rather than signal levels.
  • It may also be defined as a subject that deals with the apparatus and equipment working on the principle of electronics, but rated at power level, not at signal level.

Applications of Power electronics


Aerospace

  • Space shuttle power supplies
  • Satellite power supplies
  • Aircraft power systems

Commercial

  • Advertising
  • Heating
  • Air conditioning
  • Central refrigeration
  • Computer and office equipment
  • Uninterruptible power supplies
  • Elevators
  • Light dimmers and flashers

Industrial

  • Arc and industrial furnace
  • Blowers and fans
  • Pump and compressors
  • Industrial lasers
  • Transformers
  • Tap chargers
  • Rolling mills
  • Textile mills
  • Excavators
  • Cement mills
  • Welding

Residential

  • Air-conditioning
  • Cooking
  • Lighting
  • Space heating
  • Refrigerators
  • Electric-door openers
  • Dryers
  • Fans
  • Personal computers
  • Vacuum cleaners
  • Washing and sewing machines
  • Light dimmers
  • Food mixers
  • Electric blankets
  • Food warmer trays

Telecommunication

  • Battery chargers
  • Power supplies (dc or UPS)

Transportation

  • Battery chargers
  • Electric locomotives
  • Street cars
  • Trolley buses
  • Subways
  • Automotive electronics

Utility system

  • High voltage dc transmission (HVDC)
  • Excitation systems
  • Static circuit breakers
  • Fans and boiler-feed pumps
  • Supplementary energy systems (solar, wind)
To know about this lecture in more detail please visit on https://youtu.be/Yfwi8uHUIxY
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